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The BT8931H is a high-performance Bluetooth audio SoC launched by Bluetrum, specifically designed for head-mounted noise-cancelling headphones, TWS earphones, and smart audio devices. The chip features a 32-bit RISC-V processor core with an integrated DSP instruction set, supports Bluetooth 6.0 (compatible with BR/EDR/BLE), and offers features such as hybrid active noise cancellation (ANC), high-definition audio codec, and ultra-low power management, making it widely applicable in the high-end wireless headphone market.

BT8931H Core Features

High-performance processor

32-bit RISC-V core, 140MHz clock speed, supports DSP instruction acceleration, optimises audio processing efficiency.

16Mbit Flash + 320KB RAM, supports complex algorithm execution (e.g., neural network noise cancellation).

Bluetooth 6.0 Dual-Mode Connectivity  

Bluetooth 5.4+BR+EDR+BLE (QDID: 207169), compatible with TWS master-slave switching, supporting low-latency audio transmission.  

Maximum transmit power +10.5dBm, receive sensitivity -94.5dBm @2M EDR, enhancing signal stability.

Professional-grade audio processing

Stereo DAC (104dB SNR), supports differential/VCMBUF mode, enhancing audio purity.

5-channel ADC (102dB SNR) + 5-channel MIC input, supports AI call noise reduction and multi-microphone beamforming.

8–192 kHz sampling rate, compatible with LDAC/LHDC high-definition decoding (Hi-Res certified).

Smart noise cancellation and low power consumption

Hybrid active noise cancellation (Hybrid ANC), supports feedforward + feedback microphones, with noise cancellation depth up to -48 dB.

Neural network processing unit (NPU) optimises environmental sound recognition and adaptive noise cancellation.

Integrated PMU (charging/step-down/LDO) with extremely low standby power consumption and up to 80+ hours of battery life.

Rich peripheral interfaces

Programmable GPIO supports touch buttons, in-ear detection and other functions.

Analogue MUX flexibly switches audio input/output channels.

Key Parameters  

Model: BT8931H  

Processor: 32-bit RISC-V + DSP (140MHz)

Bluetooth Version: 6.0 (compatible with 5.4+BR+EDR+BLE)  

DAC/ADC: Stereo DAC (104dB SNR) / 5-channel ADC (102dB SNR)  

Noise Cancellation Performance: Hybrid ANC (-48dB depth)  

Storage: 16Mbit Flash + 320KB RAM  

Package: QFN40 (4×6mm)

Operating Temperature: -40°C to +85°C

BT8931H Typical Applications

Over-ear noise-cancelling headphones (e.g., FIIL Key Max, Baseus H1S).

True Wireless Stereo (TWS) earbuds with low-latency gaming mode support.

Smart speakers/wearable devices with integrated voice assistant wake-up functionality.

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