What is PWM controller LD5535E1GL
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
The internal structure of LD5535E1GL consists of circuit board, LED lamp beads, driver chip, control chip, bracket and box. This structure enables the LD5535E1GL to achieve efficient control performance and protection functions, making it a widely used PWM controller.
The LD5535E1GL is a high-efficiency PWM controller with features such as low starting current, green mode power-saving operation, current sensing leading edge blanking and internal slope compensation. In addition, it has protection functions such as OLP (overload protection), OTP (overtemperature protection) and OVP (overvoltage protection) to prevent circuit damage from occurring under abnormal conditions.
The PWM controller controls the output voltage or current by adjusting the pulse width to control the speed, temperature and other parameters of the motor.
PWM controller has the advantages of high precision, high reliability, and easy implementation, so it is widely used in motor control, power management and other fields.
The frequency and duty cycle of the PWM controller can be adjusted through programming or external hardware. In programming, a timer or counter is usually used to generate a PWM waveform, and the frequency and duty cycle are adjusted by changing the count value or the threshold of the comparator. In external hardware, a potentiometer or variable resistor can be used to adjust the duty cycle of the PWM signal.
By changing the duty cycle of the PWM controller, the input voltage to the motor driver can be controlled, thereby changing the speed of the motor. The larger the duty cycle, the faster the motor speed; the smaller the duty cycle, the slower the motor speed.
PWM controllers usually have certain anti-interference capabilities. When subjected to external interference, the output voltage or current of the PWM controller may fluctuate, but some measures can be taken to improve the anti-interference capability, such as adding filters, reducing the PWM frequency, etc.
LD5535E1GL is suitable for various application fields that require PWM control, such as LED lighting, motor control, power management, solar inverters, etc. Due to its efficient control performance and protection functions, it is particularly suitable for applications requiring long operation and high reliability.
LD5535E1GL has a built-in frequency exchange function, which can control the operation of the circuit by changing the frequency of the PWM signal. This helps reduce noise levels and reduces interference with other circuits. The frequency swap function makes the LD5535E1GL an ideal controller choice, especially where low noise and efficient control are required.
Configuration of the LD5535E1GL can be performed via a microcontroller or other programming tool. Through programming, the frequency, duty cycle and other related parameters of the PWM signal can be set to meet the needs of specific applications. In addition, protection features can be enabled or disabled to ensure safe operation of the circuit.
