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.

BD3818KS specifications

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 design purpose

BD3818KS Advantages and Disadvantages

Here are the pros and cons of the BD3818KS:


  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.


  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)


What is BD3818KS?

BD3818KS is an integrated circuit commonly used for audio signal processing. It is produced by Rohm Semiconductor.

What are the main functions of BD3818KS?

BD3818KS is an audio signal processor used to process and optimize audio signals. It can be used in consumer audio equipment to provide clear, high-quality audio output.

What is the operating voltage of BD3818KS?

The operating voltage range of BD3818KS is 5V ~ 7.4V.

What is the packaging form of BD3818KS?

BD3818KS is packaged in 80-BQFP.

What are the application fields of BD3818KS?

BD3818KS is mainly used in consumer audio equipment, such as speakers, headphones, etc., to provide high-quality audio processing capabilities. It can also be used in other areas requiring audio signal processing.

What are the characteristics of BQFP packaging?

The BQFP package has four side pins, and protrusions (cushion pads) are provided at the four corners of the package body to prevent the pins from bending and deforming during transportation. This kind of packaging is suitable for high-frequency lines and is generally installed on PCB boards using SMT technology.

What scenarios is BQFP packaging suitable for?

BQFP packaging is suitable for high pin count, miniaturization and high frequency application scenarios, such as the packaging of highly integrated chips such as microprocessors, digital signal processors (DSP), and FPGAs. In addition, BQFP packaging is also suitable for scenarios that require miniaturization and thinness, such as mobile devices, tablet computers, etc.

What are the advantages of BQFP packaging?

The advantages of BQFP packaging include: small pin spacing and large number of pins, suitable for high-density PCB applications; the package body is thin and lightweight, which is conducive to miniaturization and thinning; using SMT technology, good mounting performance , high reliability.

What are the disadvantages of BQFP packaging?

Disadvantages of BQFP packaging include: due to the long pins, there may be challenges for high-speed signal transmission; compared with BGA packaging, its heat dissipation performance is poor; and the cost is higher.

What is the difference between BQFP packaging and QFP packaging?

The main difference between BQFP packaging and QFP packaging is the setting of the buffer pad. The BQFP package is equipped with protrusions (cushion pads) at the four corners of the package body to prevent the pins from bending and deforming during transportation. The QFP package does not have a buffer pad.