Active noise reduction HI-FI Bluetooth headset solution

describe

Driven by the removal of the 3.5mm interface on Apple phones , wireless headphones, especially low-cost wireless earphones, have experienced explosive growth in recent years. As the growth of low-cost wireless earphones approaches saturation, manufacturers have recently turned to wireless high-fidelity in-ear and headphone, and wireless high-fidelity headphones have also gained a good market space.

In view of the gradual saturation of the above-mentioned markets, it is particularly important to seek more attractive markets. With the rapid development of the headphone market, noise-canceling headphones have gradually entered the mainstream market, and the market potential is huge. However, since noise-canceling headphones are currently monopolized by a few brands and are expensive, the market potential is far from being tapped. Developing a headphone with lower cost, equivalent noise-canceling performance, and high-quality sound quality equal to that of high-fidelity headphones will obviously become a new force in the market, injecting fresh blood into noise-canceling headphones, driving them to expand to ordinary users, and tapping market potential.

Shenzhen Yongfukang Technology Co., Ltd. has launched a low-cost, adaptive active noise reduction, high-fidelity Bluetooth headset solution based on this market consideration. It adopts the TP4101 + YFK2017 + HT97220 solution, which can achieve high-performance adaptive active noise reduction performance without expensive independent active noise reduction chips, and has high-fidelity professional-grade HiFi sound quality.

Among them, YFK2017 is a fully integrated adaptive active noise reduction dual-mode Bluetooth headset chip with the characteristics of full integration, high performance, low power consumption, etc. It can support BT4.2 and BLE4.2 at the same time , support HIFI sound quality (192Khz/24bit) , SNR greater than 100dB , support EQ and various sound effects technologies ( such as subwoofer, 3D surround, etc. ) , support multiple noise cancellation technologies, especially high-performance adaptive active noise reduction technology, which can allow high-end active noise reduction headphones to save expensive independent active noise reduction chips.

The HT97220 is a professional Hi-Fi grade headphone amplifier with an extremely streamlined BOM , no output DC blocking capacitors required , extraordinary distortion, signal-to-noise ratio, completely eliminated click-pop sound, and excellent low-frequency fidelity.

Program Features

1. Bluetooth version 2.1 + 4.2  dual-mode Bluetooth headset with call function ( A2DP v1.3/AVRCP v1.5/HFP v1.5 )   

2. Support SD/MMC card 

3.  USB 2.0 communication protocol

4.  2 active noise cancellation microphones, 2 microphone voice recognition ports

5. Main power supply 3.1V -- 5.5V 

6.  5 - band fully configurable EQ function

7. With I2S digital audio output interface 

8. External HI_FI field fever-grade headphone amplifier HT97220 maximum output 125mW 

9. Efficient dynamic battery charging management TP4101 

characteristic

●  Suitable for HI_FI audiophile-grade noise-cancelling headphones 

●   BGA package occupies a very small area

●   With ultra-high signal-to-noise ratio, it can restore the real acoustic content and enjoy the natural sound quality

Ultra -   low power consumption

●   600mA high-efficiency and fast lithium battery charging circuit with overcharge, over-discharge and short-circuit protection functions

Block Diagram / Schematic Diagram

PCB DEMO board