E-components

Purchasing solutions for LED electronic components requires consideration from many aspects, including demand analysis, supplier selection, quality assurance, price comparison, technical support and after-sales service, etc.

The following is a detailed introduction:

Component procurement demand analysis

Before purchasing LED electronic components, you must first clarify the specifications and performance parameters of the desired product, such as voltage, current, power, color, and size.

At the same time, the application scenarios of LEDs need to be considered, such as lighting, display, instructions, etc. Different application scenarios have different performance requirements for LEDs.

Electronic component supplier selection

In terms of supplier selection, it is necessary to consider the supplier’s size, strength, quality assurance, price and service.

You can filter through online inquiries, industry recommendations, etc., and select several suppliers that meet your needs for comparison.

Generally, there are suppliers or wholesalers of electronic components, agents and manufacturers of well-known electronic component brands; you can contact these different types of companies as needed.
Products generally available from electronic component suppliers include fixed resistors, variable resistors, potentiometers, chip capacitors, electrolytic capacitors, ceramic capacitors, mica capacitors, fixed inductors, variable inductors, coils, power transformers, Audio transformers, isolation transformers, electromagnetic relays, time relays, temperature relays, silicon rectifier diodes, transistors and thyristors, analog integrated circuits, chip resistors, digital integrated circuits, microprocessors, temperature sensors, humidity sensors, light sensors , pressure sensor, button switch, travel switch, toggle switch, resistor network, frequency component, infrared component, solar cell, crystal oscillator component.

Of course, you can also contact us, we provide electronic component products from world-renowned brands.

Quality Assurance

Quality assurance is one of the important considerations when purchasing LED electronic components. You need to understand the supplier’s quality control system, product testing standards and processes, etc., and you can ask the supplier to provide relevant quality certification documents and test reports.

Electronic components price comparison

Price comparison is another important consideration when purchasing LED electronic components. It is necessary to understand the price differences between different suppliers and analyze their rationality. At the same time, suppliers can be asked to provide quotation details to better understand product costs.

Technical Support

Technical support is one of the important considerations when purchasing LED electronic components. It is necessary to understand whether the supplier can provide technical support and solutions, as well as its technical strength and service level.

During the purchase process, you can ask the supplier for technical questions to better understand its technical support capabilities.

After-sales service

After-sales service is one of the important considerations when purchasing LED electronic components. It is necessary to understand the supplier’s after-sales service policy, maintenance and return and exchange regulations, so that you can receive timely and effective service support when needed.

To sum up, when purchasing LED electronic components, you need to comprehensively consider many aspects and choose a solution that meets your needs.

During the purchase process, you need to pay attention to quality assurance, price comparison, technical support and after-sales service, etc., so that you can choose the appropriate LED electronic components and ensure their performance and reliability.

Certification requirements

When selecting LED electronic components, you need to consider whether they comply with relevant certification standards, such as CE, RoHS, UL, etc. These certification standards have strict requirements on product safety performance, environmental performance and other aspects. Choosing products that meet certification standards can ensure their quality and reliability.

Delivery date guaranteed

For customers who need to purchase LED electronic components in large quantities, they need to consider the supplier’s delivery guarantee capabilities. Choosing suppliers with stable supply and fast delivery capabilities can ensure the smooth progress of production and avoid production delays caused by shortages.

Packing and shipping

LED electronic components require special attention during transportation because they are relatively fragile. It is necessary to consider whether the supplier can provide appropriate packaging and transportation services to ensure that the product is not damaged during transportation.

Long-term cooperation

For customers who need to purchase LED electronic components for a long time, they can consider establishing long-term cooperative relationships with suppliers.

By establishing long-term cooperative relationships, you can get more discounts and support, while also ensuring the stability of the supply chain.

To sum up, when purchasing LED electronic components, you need to comprehensively consider many aspects and choose a solution that meets your needs.

During the purchase process, you need to pay attention to aspects such as quality assurance, price comparison, technical support and after-sales service.

You also need to consider factors such as certification requirements, delivery guarantee, packaging, transportation and long-term cooperation.

By comprehensively considering these factors, you can ensure the purchase of suitable LED electronic components and ensure their performance and reliability.

LED electronic components FAQs

Designing a simple electronic component LED experiment requires detailed consideration of many factors, including the working principle of the LED, the required electronic components, circuit design and manufacturing process.

The process is introduced in detail below, but please note that this is a simple LED experimental example designed with electronic components. To learn more, please bookmark and follow our website, or contact us.

You may need to consult more information or guidance to obtain complete understanding and operational details.

All work on the LED project requires the selection and purchase of electronic components according to your needs.

Understand how LEDs work

1. LED (Light Emitting Diode) is a special electronic device that emits light when electric current passes through it. Its working principle is based on the characteristics of the PN junction. When forward biased, current flows from the anode to the cathode, and photons are emitted.
2. There are many types of LEDs with different colors. Common colors include red, green, blue and other colors. The wavelength of their light is determined by the materials used in the manufacturing process.

Select the required electronic components

1. LED: Choose an LED that suits your experimental needs, such as color, size, and brightness.
2. Resistor: used to limit the current flowing through the LED to protect the LED from damage due to excessive current. The formula for calculating the required resistor value is: R = V/I, where R is the resistor value, V is the supply voltage, and I is the current expected to flow through the LED.
3. Capacitor: used to filter noise in the circuit and protect the LED.
4. Battery or power supply: Provides power to the LED.
5. Breadboard: used to build and test circuits.
6. Wires: used to connect various components.

Design circuit

1. Determine the positive and negative poles of the LED. Generally speaking, the long leg is the positive pole and the short leg is the negative pole.
2. Design a simple circuit to connect the battery, resistor and LED. Make sure the resistor is connected between the positive terminal of the LED and the battery to limit the current flow.

Build and test circuits

1. Place all components on the breadboard and connect them using wires.
2. Make sure all connections are tight and there is no risk of short circuit.
3. Add power and observe whether the LED glows. If the LED does not light up, check that the connections are correct and that all components are working properly.
4. Adjust the brightness of the LED by changing the resistor value or battery voltage.

Further experimentation and exploration

1. Try using LEDs of different colors to observe their lighting effects under the same conditions.
2. Use multiple LEDs to design different display modes or patterns.
3. Connect the LED to the microcontroller and explore ways to program the LED to turn on and off.
4. Explore using different types of LEDs, such as ultra-bright LEDs or infrared LEDs.
5. Try connecting the LED to another type of power supply, such as AC power or an adjustable power supply.
6. Extend the experiment by adding other electronic components, such as using transistors to implement more complex control logic.

Safety Precautions

1. Always use caution and follow basic safety guidelines when handling circuits and electronic components.
2. Avoid short circuit or overload during operation to avoid damage to electronic components or risk of fire.
3. Make sure the power supply voltage matches the rated voltage of the electronic component and avoid using too high or too low voltage.
4. After the experiment, remember to disconnect the power supply and clean the work area.
5. If you encounter difficulties or problems, seek professional guidance or consult relevant professionals.

Through this simple electronic component LED experiment, you can gain an in-depth understanding of the working principle of LED, electronic circuit design and basic electronic operation skills. Through continuous experimentation and exploration, you can expand your knowledge and improve your skill level. Remember to always focus on safety issues and follow correct operating procedures and technical requirements.

Understand the relationship between LED brightness and current

The brightness of an LED is directly related to the current flowing through it. By adjusting the resistor value in the circuit, you can change the current flowing through the LED, thereby adjusting the brightness of the LED. This characteristic makes LED a flexible light source that can be used in a variety of different application scenarios.

Understand the lifespan and reliability of LEDs

LEDs generally have longer lifespans because they are less prone to failure under normal operating conditions. However, if the current is too high or the temperature is too high, the LED may be damaged. Therefore, when designing a circuit, you should consider using appropriate protection components, such as resistors and capacitors, to ensure the normal operation of the LED.

Explore different LED applications

LEDs are used in a wide range of applications, including but not limited to lighting, displays, indicators, backlights, communications, etc. Through this experiment, you can explore the application of LEDs in various scenarios and understand their working principles and design requirements.

Cultivate practical ability and innovative spirit

By designing and building circuits with your own hands, you can develop your practical skills and innovative spirit.

Experiment with different circuit designs and component combinations to explore new applications and solutions. Along the way, you may encounter various problems, but by solving them, you can continue to grow and learn.

In general, through this simple electronic component LED experiment, you can have an in-depth understanding of the working principle, circuit design and electronic operation skills of LED.

At the same time, you can also cultivate your practical ability and innovative spirit, laying a solid foundation for future study and work.

I hope this experiment can stimulate your interest and enthusiasm for electronics and lead you to a broader world of technology.

Frequently Asked Questions

BD3818KS is an audio-specific integrated circuit manufactured by Rohm Semiconductor. It is an 80-BQFP packaged integrated circuit mainly used for audio signal processing.

This integrated circuit has 6 channels, the interface type is serial, the operating voltage range is 5V to 7.4V, and the operating temperature range is -20°C to 75°C.

This integrated circuit is mainly used in consumer audio equipment and has audio signal processing functions.

Which country is Rohm Semiconductor from?

ROHM Semiconductor Group is a Japanese company founded in 1958 and is one of the most well-known semiconductor manufacturers in the world.

BD3818KS design purpose

BD3818KS and BD3811K1 are 5.1-channel audio processors developed and produced by ROHM, specially designed for home audio and video systems.

BD3811K1 and BD3818KS have built-in mode selectors, input selectors, and have multiple functions, including 6-channel volume, gain amplifier, bass, treble, mix (BD3818KS), dynamic bass boost (BD3818KS) and bass boost (BD3811K1) , these functions are integrated on one chip.

BD3818KS Advantages and Disadvantages

Here are the pros and cons of the BD3818KS:

Advantage:

1. High performance: BD3818KS is a high-performance audio-specific integrated circuit with excellent audio processing capabilities.
2. High integration: This integrated circuit integrates multiple audio processing functions on one chip, simplifying circuit design and reducing the number of external components.
3. Easy to use: BD3818KS has a simple and easy-to-use interface to facilitate connection and communication with other devices such as microcontrollers.
4. High reliability: This integrated circuit has undergone strict quality control and testing and has high reliability.

Disadvantages:

1. Higher price: BD3818KS is a dedicated audio integrated circuit with a relatively high price, which may increase the cost of the entire system.
2. Limited scope of application: This integrated circuit is mainly used for consumer audio equipment and may not be suitable for other types of audio equipment.
3. Lack of flexibility: Since BD3818KS is an application-specific integrated circuit, its functions and performance may be more fixed than general-purpose chips and lack flexibility.

What devices is the BD3818KS suitable for?

BD3818KS is suitable for use on equipment with audio processing requirements, especially for consumer audio equipment.

Since it is an audio-specific integrated circuit, it can play its advantages in devices that require audio signal processing, amplification, sound effect enhancement and other functions. Specifically, devices suitable for using BD3818KS include but are not limited to:

1. Audio player: used to play music or sounds and perform audio signal processing.
2. Audio recording equipment: used to record sounds and perform audio signal processing.
3. Smart speaker: As the core chip for speech recognition and audio output.
4. Game console: used for audio signal processing and sound effect enhancement.
5. TV: used for audio signal processing and sound effect enhancement.

It should be noted that the specific scope of application of BD3818KS needs to be determined based on its technical specifications and performance indicators, as well as the overall circuit design and system requirements of the device.

Bd3818ks datasheet manual download (Bd3818ks datasheet pdf)

BD3818KS FAQs

Hello everyone, my name is AnWen, and today we will share with you the solar charging control PCB design.

In the future, I will share with you DFM manufacturability analysis, PCB design, DFM tools, circuit design and other related knowledge here. Please give me your advice.

What I want to share with you today is: PCB project – MPPT solar charge controller using LT3652. (Attached with project schematic diagram + project information (Gerber) file, please remember to send me a private message to receive it)

Almost every solar-based system has a battery associated with it that must be charged from the sun, and the energy from the battery is used to drive the load. But to use solar panels to charge batteries, a better option is MPPT or maximum power point tracker topology, which has better accuracy than PWM controlled charger.

Working principle of MPPT solar charge controller

MPPT is an algorithm commonly used in solar chargers. The charge controller measures the output voltage of the panel and the battery voltage. By taking these two data, comparing them to determine the optimal power that the panel can provide to charge the battery. .

In any case, whether the sunlight conditions are good or poor, the MPPT charge controller uses this maximum power output factor and converts it into the optimal charging voltage and current for the battery. Whenever the power output of the solar panel decreases, the battery charging current also decreases.

Therefore, in low sunlight conditions, the battery is continuously charged based on the output of the solar panel. This doesn’t usually happen with regular solar chargers. Because every solar panel comes with a maximum output current rating and a short circuit rating.

MPPT is approximately 90%-95% efficient in conversion. Efficiency then also depends on solar driver temperature, battery temperature, solar panel mass and conversion efficiency.

In this project, build a solar MPPT charger for lithium batteries.

Design MPPT Charger

Will charge 2P2S battery (6.4-8.4V)
Charging current is 600mA
There will be an additional charging option using an adapter

List of components required to build the MPPT controller

LT3652 driver
1N5819 – 3 pcs.
10k pot
10uF capacitor – 2 pcs
Green LED
Orange LED
220k resistor
330k resistor
200k resistor
68uH inductor
1uF capacitor
100 uF capacitor – 2 pcs.
Battery – 7.4V
2 1k resistors
Barrel socket

MPPT solar charger circuit diagram

The complete solar charge controller circuit is shown below:

This circuit uses the LT3652, a complete monolithic step-down battery charger that operates from an input voltage range of 4.95V to 32V. Therefore, the maximum input range for solar and adapter is 4.95V to 32V.

The LT3652 provides a constant current/constant voltage charging feature that can be programmed through a current sense resistor for a maximum charge current of 2A.

Output Section: The charger uses a 3.3V float voltage feedback reference so any desired battery float voltage up to 14.4V can be programmed using a resistor divider.

The LT3652 also contains a programmable safety timer using a simple capacitor, which is used to terminate charging after a desired time, useful for detecting battery failure.

The LT3652 requires MPPT setting, and one of the potentiometers can be used to set the MPPT point. When the LT3652 is powered by a solar panel, the input regulation loop is used to maintain the panel at peak output power. How to maintain regulation depends on the MPPT setting potentiometer.

MPPT solar charger value setting

1. Battery voltage setting
   VR1 is used to set the MPPT point, R2, R3, and R4 are used to set the 2S battery charging voltage (8.4V). The formula for setting the battery voltage is as follows:

RFB1 = (VBAT(FLT) • 2.5 • 10 5 )/3.3

RFB2 = (RFB1 • (2.5 • 10 5 ))/(RFB1 – (2.5 • 10 5 )) (set battery voltage formula)

2. Timer settings
   Capacitor C2 is used to set the charging timer, which can be set using the following formula:

tEOC = CTIMER • 4.4 • 10 6 (in hours) (set timer)

D3 and C3 are the boost diode and boost capacitor that drive the internal switch and promote saturation of the switching transistor. The boost pin operates from 0V to 8.5V.

3. Charging current setting
   R5 and R6 are parallel current sensing resistors, and the charging current can be calculated using the following formula:

RSENSE = 0.1/ICHG(MAX) (set charging current)

The current sense resistors in the schematic are chosen to be 0.5 Ω and 0.22 Ω, which are combined in parallel to produce 0.15 Ω. Using the above formula it will produce a charging current of almost 0.66A, C4, C5 and C6 are the output filter capacitors.

How the DC barrel jack is connected: If you plug the adapter jack into the adapter socket, the solar panel will disconnect. D1 will protect the solar panel or adapter from reverse current flow during no charging conditions.

Solar Charge Controller PCB Design

For the MMPT circuit discussed above, the MPPT charger controller 3D PCB diagram is designed, as shown below:

The design has a GND copper plane with appropriate connecting vias, the LT3652 requires an adequate PCB heatsink, which is created using a GND copper plane and placing the vias in the solder plane.

Assembling the MPPT Solar Charge Controller

The physical picture of the MPPT charger controller PCB is shown below:

Testing the MPPT Solar Charger

To test the circuit, a solar panel rated 18V .56A was used. The picture below is the detailed specifications of the solar panel.

Detailed specifications of solar panels

The complete circuit was tested under mild sunlight conditions using a 2P2S battery (8.4V 4000mAH) battery for charging –

After everything is connected, set the MPPT when the sun conditions are right and control the potentiometer until the charging LED starts glowing and the circuit is working smoothly.

Frequently Asked Questions

A triode is an electronic component made on a semiconductor substrate. It consists of two PN junctions that are very close to each other.

These three parts divide the entire semiconductor into three parts: base area, emitter area and collector area.

Depending on the arrangement of the semiconductor materials, there are two types of transistors: PNP and NPN.

The pin design of the triode means that the triode has three pins, which are the base (Base, referred to as B), the collector (Collector, referred to as C) and the emitter (Emitter, referred to as E).

Transistor pin design core

These three pins correspond to the three areas inside the triode, and each pin has its specific function and role.

Base (B):

The base is the control electrode of the triode. It controls the amplification of the triode by controlling the input of current. Small changes in the base current will cause large changes in the collector current, thereby achieving current amplification.

Collector (C):

The collector is the main output terminal of the triode. It is responsible for collecting and outputting the amplified current. When the triode is working, a certain voltage needs to be applied between the collector and the emitter to maintain the normal operation of the triode.

Emitter (E):

The emitter is another important output terminal of the triode. It forms a PN junction together with the base and collector to achieve current amplification. The current change of the emitter is controlled by the base current. When the base current increases, the emitter current will also increase accordingly.

In the actual application of triodes, the pin design allows the triode to be easily connected and combined with other electronic components to achieve various complex circuit functions.

For example, in the microcontroller application circuit, the triode mainly plays the role of a switch, controlling the on-off of the entire circuit by controlling the on-off of the base current. In addition, triodes can also be used for circuit functions such as signal amplification and modulation.

Why do we need to design the pins of the triode?

The pins of the transistor are designed for efficient connection and utilization. First of all, through reasonable pin design, reliable connection between the triode and other electronic components can be achieved to ensure the stability and reliability of the circuit. Secondly, the pin design can optimize the input and output of current and signals, thereby optimizing the working efficiency and performance of the triode. In addition, reasonable pin design can also facilitate the detection, repair and replacement of triodes, improving the maintainability and reliability of electronic equipment. In short, the pins of the triode are designed to meet various needs in practical applications and to achieve efficient, stable and reliable operation of electronic equipment.

How are the pins of the triode designed?

The transistor is a common electronic component with three electrodes, namely base b, collector c and emitter e.

In terms of pin design of transistors, certain standards are generally followed to ensure compatibility with other components and circuits.

Here are some key points about transistor pin design:

1. Pin arrangement: The pin arrangement sequence of triodes is usually determined according to international standards. Normally, the three pins of a triode are arranged in a certain order, usually in the order of base, collector and emitter. In circuit diagrams, they are also labeled and annotated in this order.
2. Pin function: The function of each pin is specific. The base is the control electrode, the collector is the input electrode, and the emitter is the output electrode. In the circuit, by controlling the size of the base current, the current flow between the collector and the emitter can be controlled, thereby achieving functions such as signal amplification and switching control.
3. Package type: There are many package types of transistors, and each package type has different pin arrangements and sizes. For example, TO-92 packaging, TO-220 packaging, SOT-23 packaging, etc. When designing these package types, factors such as pin arrangement, pin spacing, and pin length need to be considered to ensure that the components can be successfully installed on the circuit board.
4. Pin spacing: Pin spacing refers to the distance between two adjacent pins. The size of this distance has a certain impact on the installation of components and the layout of the circuit board. Generally speaking, the larger the pin spacing, the easier it is to install and solder components, and it will also help improve the anti-interference performance of the circuit board.
5. Lead length: Lead length is the length from the bottom of the component to the top of the lead. When selecting the pin length, two factors need to be considered: one is the convenience during soldering, and the other is the space for the circuit board layout. If the pin length is too long, it may cause problems such as instability during soldering or short circuits with other components; if the pin length is too short, it may affect the layout and routing of the circuit board.

When designing the transistor pins, you also need to pay attention to the following points:

1. Consider package type and size: Different package types have different sizes and pin arrangements. You need to choose the appropriate package type and size according to actual needs.
2. Consider circuit board layout and wiring: When selecting pin length and spacing, you need to consider the needs of circuit board layout and wiring to ensure the stability of component installation and the reliability of circuit performance.
3. Follow standards: When designing pins, international standards and industry specifications should be followed to ensure that the designed transistor is compatible with other components and circuits.
4. Conduct simulation and testing: During the design process, simulation and testing can be performed to verify the feasibility and reliability of the design. This helps reduce errors and defects in the design and improves the success rate of the design.

In short, transistor pin design is a process that requires consideration of multiple factors. In the design, multiple aspects such as package type, functional requirements, circuit board layout, and standard specifications should be comprehensively considered.

Through reasonable design, the stability and reliability of the triode in the circuit can be ensured, thereby improving the performance and quality of the entire circuit.

International standards

There is no unified international standard for transistor pin design, because different manufacturers and different application scenarios may use different pin arrangement sequences. However, there are some common pin ordering and labeling methods to facilitate user understanding and use.

A common pin arrangement is the TO-92 packaged triode, whose pin arrangement is base, collector, and emitter. On the pins of the TO-92 package, the numbers 1, 2, and 3 are usually marked, corresponding to the base, collector, and emitter respectively. In addition, the letters B, C, and E are also marked on the pins of some triodes, which represent the base, collector, and emitter respectively.

Another common pin arrangement is the SOT-23 packaged transistor, whose pin arrangement is emitter, base, collector. On the pins of the SOT-23 package, the numbers 1, 2, and 3 are usually marked, corresponding to the emitter, base, and collector respectively. In addition, the letters E, B, and C are also marked on the pins of some triodes, which represent the emitter, base, and collector respectively.

In addition to the common pin arrangement order and labeling methods, there are also some special transistors that may use non-standard pin arrangement order and labeling methods. Therefore, when selecting and using a triode, users need to carefully check the triode’s specification sheet or circuit diagram to ensure correct connection and use.

It should be noted that the pin arrangement of transistors from different manufacturers may be different. Therefore, in actual use, it is necessary to carefully check the pin arrangement and labeling of the transistors to avoid connection errors that may cause abnormal circuit operation. At the same time, for some special application scenarios and specially packaged transistors, users need to select and use them according to specific requirements.

Transistor pin design FAQs

The SOT-23 package is a small surface mount package commonly used in integrated circuits (ICs) and semiconductor devices.

Generally, small-profile transistors with less than or equal to 5 pins.

SOT-23 stands for “Small Outline Transistor 23”. This package is widely used in many electronic devices due to its compact size, good heat dissipation performance and adaptability.

The SOT-23 package is a three-pin surface mount package commonly used for integrated circuits, diodes, transistors and other components.

Definition

It is divided into two types according to the surface width, one with a width of 1.3mm and the other with a width of 1.6mm. The corresponding Socket models are 4330 121 and 4331 121 respectively. Need to pay attention when using it.

Width category:

1.3mm, 1.6mm

Socket model:

4330 121 (corresponds to 1.3mm), 4331 121 (corresponds to 1.6mm)

Advantage

The advantages of SOT-23 packaging include the following aspects:

1. Miniaturization: The SOT-23 package has a compact size to meet the growing demand for miniaturized electronic products.
2. High reliability: Due to its sturdy and compact design, the SOT-23 package can effectively protect the internal components from the external environment, thus improving its reliability.
3. Easy to solder: SOT-23 package has good soldering performance, which can ensure reliable connection between components and circuit boards.
4. Reduce costs: Due to its miniaturization and high reliability, SOT-23 packaging can help manufacturers reduce production costs and improve production efficiency.
5. High performance: SOT-23 package can provide good electrical and thermal performance to support high-performance electronic applications.

In short, the SOT-23 package has the advantages of miniaturization, high reliability, easy welding, cost reduction, and high performance, so it is widely used in many electronic devices and products.

Disadvantage

The SOT-23 package also has some disadvantages in some aspects. First, due to its compact size, the SOT-23 package may not be suitable for applications requiring high power or high current. Secondly, because the components in its package are very dense, the heat dissipation performance may be limited, and special attention needs to be paid to thermal management issues. In addition, due to the higher price of the SOT-23 package, it may not be suitable for some cost-sensitive applications.

In summary, although the SOT-23 package has many advantages, you need to pay attention to its potential shortcomings when using it, and take appropriate measures to overcome these problems.

Classic application cases of SOT-23 packaging

The following are some application examples of SOT-23 in life. SOT is generally a small outline transistor with less than or equal to 5 pins.

Look at the picture, this is the SOT-23 package shape

SOT-23 is divided into two types according to the surface width, one is 1.3mm wide and the other is 1.6mm wide. The corresponding Socket models are 4330 121 and 4331 121 respectively. Need to pay attention when using it.

Mobile devices

SOT-23 packaged components are commonly used in mobile devices such as smartphones, tablets, and digital cameras. For example, power management chips, battery management chips, amplifiers, sensors, etc. can all be packaged in SOT-23.

Household electronic products

SOT-23 is commonly used in control circuits and signal processing circuits in household electronic products. For example, power management chips, amplifiers, filters and other components in televisions, audio equipment, wireless routers and other products may be packaged in SOT-23.

Automotive electronics

SOT-23 is also widely used in automotive electronic systems. For example, sensors, drivers, switches, etc. in the engine control unit (ECU) are often packaged in SOT-23. In addition, some auxiliary chips in vehicle entertainment systems, navigation systems, etc. may also be packaged in SOT-23.

Smart Home

SOT-23 packaged components can be used in control and sensing circuits in smart home devices. For example, microcontrollers, wireless communication chips, sensors, etc. in smart light bulbs, smart sockets, smart door locks and other products often use SOT-23 packaging.

Medical equipment

SOT-23 packaging also has certain applications in medical equipment. For example, control circuits, signal processing circuits, etc. in medical instruments can be packaged in SOT-23.

It should be noted that the specific applications of SOT-23 packaging in various fields may vary depending on product design and requirements. The above are just some common examples, and actual application scenarios may be more extensive and diverse.

SOT-23 packaging FAQs

Precision components refer to electronic components with high precision, good stability, and high reliability. They are usually used in circuits, systems, and instruments that require high precision.

Compared with ordinary components, precision components require higher precision and better stability, and can maintain relatively stable electrical parameters and mechanical properties in the working environment.

Common precision components include resistors, capacitors, inductors, transistors, integrated circuits, etc. These components have the characteristics of simple structure, clear principle, reliable performance and long service life.

The meaning of precision electronics

It refers to electronic products or components that are manufactured with very high precision and very small errors. In the machinery and electronics industries, the word precision is usually used to describe products or components that require extremely high precision, complex manufacturing processes, and require the use of advanced production equipment and testing methods to ensure product quality and stability.

Main feature

The main characteristics of precision electronic components include high precision, high reliability, high stability, high consistency, low noise and low power consumption.

Types of precision electronic components

There are many types of precision electronic components, which can be roughly divided into the following categories according to their functions and uses:

1. Resistor: A resistor is a device used to control electrical transmission, mainly used to control current, voltage and power. According to different materials, they can be divided into carbon film resistors, metal film resistors, thermistors, etc. Among them, carbon film resistors have the characteristics of high precision and good stability, and are often used in precision measurement, circuit calibration and other fields.
2. Capacitor: A capacitor is a device used to store and release charges. It is mainly used to regulate voltage and current. It can be divided into ceramic capacitors, dielectric capacitors, ohmic capacitors, etc. according to materials. Among them, ceramic capacitors have the characteristics of fast frequency response and electrical stability, and are usually used in high-precision circuits such as electronic computers and navigation systems.
3. Inductor: An inductor is a component that can store magnetic field energy and is mainly used in circuits such as filtering, oscillation, and voltage transformation. Precision inductors have the characteristics of high precision, high Q value, and low loss, and are widely used in communications, radar, medical electronics and other fields.
4. Diodes and transistors: Diodes and transistors are semiconductor devices with functions such as amplification, switching, and voltage stabilization. Precision diodes and transistors have the characteristics of low power consumption, high speed, and high reliability, and are widely used in integrated circuits, power electronics and other fields.
5. Sensor: A sensor is a device that can convert physical quantities into electrical signals, such as pressure sensors, temperature sensors, photoelectric sensors, etc. Precision sensors have the characteristics of high precision, high sensitivity, and high stability, and are widely used in automation, robotics, aerospace and other fields.

In addition to the above types of components, there are many other types of precision electronic components, such as filters, oscillators, crystal oscillators, field effect transistors, etc. These components play an important role in their respective fields and provide a solid foundation for the development of modern electronic technology.

How to Make Precision Electronic Components

Manufacturing precision electronic components requires the use of a series of advanced processes and technologies, including microelectronics manufacturing technology, precision processing technology, thin film deposition technology, photolithography and etching technology, etc. These technologies can produce high-precision and high-stability electronic components at the nanometer level to meet various complex and precise application requirements.

Specifically, microelectronics manufacturing technology is a manufacturing technology that integrates microelectronic devices, circuits and systems on a chip. It includes integrated circuit manufacturing, micro-nano device manufacturing, thin film manufacturing and other aspects, and is one of the core technologies for manufacturing precision electronic components.

Precision machining technology is a technology for manufacturing mechanical components and structures with high precision, high surface quality, and high stability. It includes micro-cutting, grinding, grinding, polishing and other processes, which can process very fine and complex mechanical parts.

Thin film deposition technology is a technology that deposits thin film materials on the surface of a substrate. It includes physical vapor deposition, chemical vapor deposition and other methods, which can prepare thin film materials with high purity, high density and high adhesion. It is one of the important processes for manufacturing precision electronic components.

Photolithography and etching technologies are key technologies for manufacturing integrated circuits and micro-nano devices. Photolithography is to irradiate the designed circuit pattern onto the photosensitive material through a light beam to cause a chemical reaction to form a copy of the circuit pattern; etching is to use the copied circuit pattern to change the circuit pattern from the chemical reaction or physical impact. The base material is peeled off to form the actual circuit.

In addition to the above technologies, manufacturing precision electronic components also requires the use of a series of auxiliary processes and technologies, such as electroplating, coating, heat treatment, etc. These processes and technologies can improve the electrical performance, mechanical performance and environmental adaptability of components, thereby improving the reliability and stability of components.

In short, manufacturing precision electronic components requires the use of a series of high-precision processes and technologies, which requires a high degree of specialization and technology accumulation. At the same time, it is also necessary to continuously introduce new technologies and develop new products to meet the growing market demand.

Manufacturing Equipment

Precision electronic component manufacturing equipment mainly includes the following categories:

1. Manufacturing equipment: such as printing machines, placement machines, welding machines, cutting machines, etc., used to manufacture and assemble electronic components. These devices require high precision and stability to ensure that the electronic components manufactured meet the requirements.
2. Testing equipment: such as testing machines, microscopes, oscilloscopes, etc., used to test the performance and quality of electronic components. These devices require high precision and sensitivity to ensure the accuracy and reliability of detection results.
3. Auxiliary equipment: such as cleaning machines, dryers, coating machines, etc., used to assist in the manufacturing and testing of electronic components. These devices require high precision and efficiency to ensure the quality and production efficiency of electronic components.

These equipment need to have high precision, high stability, high reliability and other characteristics to meet the manufacturing and testing requirements of precision electronic components.

In addition, with the continuous advancement of technology and increasing application requirements, manufacturing equipment is also constantly developing and innovating to adapt to new manufacturing processes and higher performance requirements.

Application areas

1. Communication field: Precision electronic components are used to manufacture communication equipment, optical communication devices, mobile communication base stations, etc., supporting high-speed data transmission and signal processing.
2. Automotive electronics field: Precision electronic components are used in automobile control systems, sensors, actuators, etc. to improve the safety, comfort and fuel economy of automobiles.
3. Computer and network fields: Precision electronic components are indispensable components for manufacturing computer processors, memory modules, network equipment, etc., supporting the computing and data transmission of computers and networks.
4. Digital audio and video field: Precision electronic components are used in high-definition video processing, audio processing, etc. to provide high-quality audio-visual experience.
5. Aerospace field: Because precision electronic components have the characteristics of high stability and high reliability, they are used to manufacture aerospace equipment, satellite communications, etc.
6. Medical electronics field: Precision electronic components are used in medical equipment, such as medical imaging equipment, surgical robots, etc., to improve the level and efficiency of medical services.

These application fields have very high requirements on the performance and quality of precision electronic components, so advanced manufacturing processes and technologies are required to ensure their quality and stability.

At the same time, with the continuous advancement of technology and increasing application requirements, precision electronic components are also constantly developing and innovating to meet the stringent requirements of various fields.

Frequently Asked Questions

Ultrasonic generator, also known as ultrasonic drive power supply, electrical box, and controller, is an important component of high-power ultrasonic system.

The high-frequency AC signal matched by the ultrasonic generator and the ultrasonic transducer is used to drive the ultrasonic transducer to work.

What is the function of ultrasonic generator

The function of the ultrasonic generator is to convert the mains power into a high-frequency AC signal that matches the ultrasonic transducer and drive the ultrasonic transducer to operate.

High-power ultrasonic power supplies generally use switching power supply circuits in terms of conversion power.

Ultrasonic power supplies are divided into self-excited and other-excited power supplies. The self-excited power supply is called ultrasonic simulation power supply, and the other-excited power supply is called ultrasonic generator.

Working principle of ultrasonic generator

An ultrasonic generator, also known as an ultrasonic power supply or ultrasonic transducer, is a device that converts electrical energy into mechanical energy. It uses the principle of the piezoelectric effect to drive the piezoelectric ceramic material by applying high-frequency AC voltage, causing it to produce mechanical vibrations of the same frequency.

The working principle of the ultrasonic generator can be summarized as follows:

1. AC voltage: Ultrasonic generators usually use 220V or 380V AC voltage as input, and convert it into DC voltage through rectification and filtering.
2. Oscillator: The oscillator is the core part of the ultrasonic generator. It can be a self-excited oscillator or a self-excited oscillator. The self-excited oscillator generates oscillation through a positive feedback circuit, while the self-excited oscillator requires an external signal source to provide an excitation signal.
3. Piezoelectric ceramics: Ultrasonic generators use the piezoelectric effect of piezoelectric ceramics to convert electrical energy into mechanical energy. When piezoelectric ceramics are acted upon by an external electric field, they deform and produce mechanical vibrations.
4. Resonance unit: In order for the ultrasonic generator to work properly, it needs to match the impedance and frequency of the ultrasonic resonance unit. The resonant unit usually consists of an adjustable capacitor and a fixed impedance resistor to adjust the resonant frequency and impedance matching.
5. Amplifier: Since the amplitude of the transducer output is low, usually only a dozen microns, an amplifier is needed to amplify the amplitude. The amplifier amplifies the mechanical vibration signal output by the transducer so that it has sufficient energy for various applications.

In short, an ultrasonic generator is a device that uses the piezoelectric effect to convert electrical energy into mechanical energy.

Its working principle is to drive the piezoelectric ceramic material by applying high-frequency AC voltage to produce mechanical vibration at the same frequency, and adjust the parameters of the output signal through the resonant unit and amplifier.

What are the types of ultrasonic generators?

There are many types of ultrasonic generators, which can be divided into the following types according to different classification methods:

1. According to the working frequency, it can be divided into low frequency (100hz) and medium frequency (100~10mhz) ultrasonic generators.
2. According to the energy conversion mode, it can be divided into electromagnetic, piezoelectric ceramic and semiconductor ultrasonic generators.
3. According to the output waveform, it can be divided into continuous wave and pulse wave ultrasonic generators.
4. According to power, it can be divided into small power, medium power and high power ultrasonic generator.
5. According to the circuit structure, it can be divided into self-excited and separately excited ultrasonic generators.

In addition, there are some specific classifications, such as frequency-adjustable ultrasonic generators, 100W/300W ultrasonic generators, low-power ultrasonic generators, high-frequency ultrasonic generators, large-function ultrasonic generators, and digital display ultrasonic generators according to function. Generator etc.

How to judge the quality of ultrasonic generator

The quality of ultrasonic generators is generally judged from the following two points:

1. Check whether the output power is constant. We know that when the voltage of the ultrasonic power supply changes. The output power of the ultrasonic power supply will also change. At this time, the mechanical vibration reflected on the ultrasonic transducer will become larger and smaller, causing the cleaning effect to be unstable. Therefore, it is necessary to stabilize the output power and adjust the power amplifier accordingly through the power feedback signal to make the power amplification stable.
2. Check whether frequency tracking is efficient. When the ultrasonic transducer works at the resonant frequency point, it has the highest efficiency and the most stable operation. However, the resonant frequency point of the ultrasonic transducer will change due to assembly reasons and aging of the work. Of course, this change is only a frequency drift and does not change. It will be huge. Frequency tracking can control the frequency of the ultrasonic generator to follow the resonant frequency point of the ultrasonic transducer within a certain range. Let the generator always work at its best.

Matching problem between ultrasonic generator and transducer

Among ultrasonic cleaning machines of the same model, if the ultrasonic generator and transducer are well matched and debugged, the cleaning effect will be better; if the ultrasonic generator and transducer are poorly matched and debugged, the cleaning effect will be poor.

For the same ultrasonic system, if the cleaning effect deteriorates after working for a period of time, or the vibration box is replaced, the impedance matching circuit needs to be re-adjusted.

Different from the matching of general electronic equipment, the impedance matching of ultrasonic generators not only solves the problem of rheostat, but also solves the problem of tuning.

At present, most companies conduct matching and debugging based on the personal experience of ultrasonic engineers, and the matching effect also depends on people. different.

In actual application scenarios, some manufacturers found that the ultrasonic wave debugged in the factory was not effective at the customer’s end.

There are also customers asking why their cleaning equipment is running normally, but the cleaning quality of the products is unstable. There are many factors involved, and the failure of the ultrasonic system to match well is one of the important factors.

The matching and debugging of the ultrasonic system is crucial for ultrasonic cleaning equipment, but the current manual matching and debugging method greatly restricts the manufacturing efficiency of the ultrasonic system and the stability of the cleaning equipment.

Analysis of development trends of ultrasonic generators

Develop

The development of ultrasonic generators has gone through four stages:

The first stage: the era of tube generators (before the 1980s);

The second stage: the era of transistor analog generators (1980s and 1990s);

The third stage: the era of switching generators (currently mainstream);

The fourth stage: digital generator era (future trend).

Future trends

With the continuous development of China’s science and technology and the continuous upgrading of industry, ultrasonic technology is also constantly innovating. In the wave of industrial digital transformation, various types of automated cleaning equipment are also undergoing digital upgrades to adapt to the requirements of future digital factories. Ultrasonic generators are about to enter the era of digital generators.

Ultrasonic generators of the future will become simpler, more versatile and smarter. Matching and debugging do not require professionals, anyone can easily achieve it with one click; the compatibility is greatly improved, and one generator can match loads of multiple frequencies and powers; it can be easily connected to the digital network to communicate with cleaning equipment and factory control communication.

More and more cleaning equipment manufacturing companies will tend to use ultrasonic generators with intelligent matching functions, and the pain points of the ultrasonic cleaning industry will also be solved with the development of technology.

Frequently Asked Questions

The PWM controller LD5535E1GL is a highly integrated power management chip with features such as green mode power-saving operation, low startup current, current sensing, and internal slope compensation.

In addition, it has built-in protection functions such as overload protection (OLP), over-temperature protection (OTP), and over-voltage protection (OVP) to help prevent circuit damage under abnormal conditions.

The PWM controller LD5535E1GL has a low component count or circuit space requirements in circuit design, making it particularly suitable for use in total solutions. Its low starting current and green mode operation also help reduce energy consumption, thereby extending the life of the device.

In addition, the LD5535E1GL also has a frequency swap function, which helps reduce noise levels and makes EMI filter design easier. This kind of controller is widely used in audio circuits, power circuits and other application scenarios.

It should be noted that although the LD5535E1GL has many advantages, its working conditions and limitations still need to be paid attention to in actual use, such as maximum power supply voltage, minimum operating temperature, maximum operating temperature and other parameters.

At the same time, for electronic systems or products that need to use the PWM controller LD5535E1GL, sufficient market research and risk assessment are also required to ensure their performance and safety.

Green Mode PWM Controller, Frequency Swapping and Integrated Protection LD5535E1GL has built in several features, protection and EMI improved solutions in a small package. It requires less component count or circuit space, making it ideal for low-cost total solutions.

Features implemented include low starting current, green mode power-saving operation, current sensing leading edge blanking and internal slope compensation. It also has more protections such as OLP (Overload Protection), OTP (Over Temperature Protection) and OVP (Over Voltage Protection) to prevent circuit damage from occurring under abnormal circumstances.

Additionally, the frequency swap feature is designed to reduce noise levels, thereby helping power circuit designers easily handle EMI filter design with minimal component cost and development time.

PWM controller LD5535E1GL principle circuit diagram

Characteristic

•High voltage CMOS process with excellent ESD protection

•Extremely low startup current (<1μA)

•Current mode control

•Green mode control

•UVLO (under voltage lockout)

•LEB (leading edge blanking) on CS pin

•Internal frequency exchange, slope compensation

•OVP (Over Voltage Protection) on VCC and CS pins

•OTP (Over Temperature Protection) via NTC

•OLP (overload protection)

•Output short circuit protection

•Gate source/sink capability: 255mA/-500mA @output pin, 33nF capacitor

How does LD5535E1GL work?

LD5535E1GL is a PWM controller with multiple built-in functions. Its working principle is as follows:

By changing the duty cycle of the control signal, the brightness of the LED lamp beads can be controlled. When the duty cycle of the control signal increases, the brightness of the LED lamp bead increases; conversely, when the duty cycle of the control signal decreases, the brightness of the LED lamp bead decreases.

In addition, LD5535E1GL also has protection functions such as overload protection, over-temperature protection and over-voltage protection.

When the circuit encounters abnormal conditions such as overload, overtemperature or overvoltage, LD5535E1GL will automatically cut off the control signal to protect the circuit and LED lamp beads from damage.

In addition, the LD5535E1GL also features low startup current, green mode power-saving operation, and current sensing cutting edge cutting. These features enable the LD5535E1GL to achieve efficient control performance and protection functions, making it a widely used PWM controller.

Application

•Switch AC/DC adapter and battery charger

•Open frame switching power supply

Where can I buy LD5535E1GL?

If you purchase in large quantities, we provide PWM controller LD5535E1GL power management chip. The LD5535E1GL costs approximately $1.00 each. Welcome to contact us to purchase LD5535E1GL Tongjia electronic component chip On-Bright chip IC wholesale products.

In the entire analog IC, the power management IC plays a very important role. In addition to the increasing popularity of power-saving and low-power portable products, emerging alternative energy sources, such as solar energy, bioenergy, etc., are energy-saving and environmentally friendly, including panel driver IC, LDO, white light backlight LED driver IC, charging device CMOS Sensor, etc. It has become an area where analog IC companies have begun to invest.

Most of the operating current of portable electronic products is below 300mA, and most of them use 5# nickel-cadmium and nickel-metal hydride batteries. If 1 to 2 batteries are used and the voltage is boosted to 3.3V or 5V and required to output a current of more than 500mA, the battery life will be short. The long or short charging interval makes it inconvenient to use. At this time, a buck-type DC/DC converter is used, whose efficiency is similar to that of a boost-type converter, but the battery life or charging interval is much longer.

FAQs