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The TAS6684QPHDRQ1 is a four-channel automotive Class D audio amplifier launched by Texas Instruments, mainly applied in high-power automotive audio systems. The following are its core features:

Compliant with the AEC-Q100 standard for automotive applications, TA temperature class 1: -40°C to +125°C

Normal operation

The power supply voltage is 4.5V to 45V, and the load suddenly drops to 50V

Supports 1.8V and 3.3V I/O

I2C control, with eight address options

The idle power loss at 14.4V is less than 2W, and the maximum VBAT+PVDD turn-off loss is less than 8uA

Integrated DSP processing

H-class power supply voltage control

Thermal monitoring and turnaround

Clipping detection, PVDD monitoring and turnaround

Output current detection is carried out by channel through I2S/TDM without the need for external circuits

Real-time load diagnosis

Monitor the output conditions when playing audio

Open-circuit load, short-circuit load, power supply short circuit and ground short circuit detection

Diagnosis of DC and AC standby loads

Audio input

2-4 channel I2S or 4-16 channel TDM input

Input sampling rates: 44.1kHz, 48kHz, 96kHz, 192kHz

Low latency: <100μs (at a sampling rate of 96k)

Audio output

4-channel bridging load (BTL), configurable 2-channel parallel BTL (PBTL)

The output switching frequency can be configured from 384kHz to 2MHz

Channel output current up to 13A

400VA peak BTL output power

118W (45V, 8Ω, 1% THD, BTL)

218W (45V, 4Ω, 1% THD, BTL)

Audio performance

THD+N 0.03% (8Ω, 1W, 1kHz)

SNR: 111 dB

Output noise: 37µV (14.4V), 80µV (45V)

"Protection"

Output short-circuit protection

Dc offset voltage, undervoltage and overvoltage

Configurable overheating warning and single-channel shutdown

I2C temperature and power supply voltage readings

Easily meet the CISPR25-L5 EMC specification and feature advanced spread spectrum functionality

For details

The TAS6684QPHDRQ1 is a four-channel, digital input, high-voltage, Class D audio amplifier that supports a power supply voltage up to 45V. Combining an output current of up to 13A, this device can provide ultra-high output power and high-fidelity audio under both high-impedance and low-impedance loads. TAS6684QPHDRQ1 offers four channels at 118W (45V, 8Ω, 1% THD, BTL) and 218W (45V, 4Ω, 1% THD, BTL).

The TAS6684QPHDRQ1 integrates DC and AC load diagnostic functions, which can determine the status of the connected load before enabling the output stage. During audio playback, the status can be monitored through the output current detection function applicable to each channel and the temperature of each channel, and the measurement results can be reported to the host processor with an ultra-small delay via TDM. The TAS6684QPHDRQ1 uses a real-time load diagnosis function that operates independently of the host and audio input to monitor the output load status when playing audio.

To optimize system efficiency, the DSP integrated in TAS6684QPHDRQ1 supports H-class envelope tracking control, eliminating the need to develop complex tracking software and enabling local boost control without an external microcontroller.

The TAS6684QPHDRQ1 device provides an additional low-latency signal path for each channel, offering up to 70% faster signal processing speed at 48kHz and supporting an audio signal path delay of less than 100us at a sampling rate of 96kHz. Thereby supporting time-sensitive active noise cancellation (ANC) and road noise cancellation (RNC) applications.

Target application

Automotive external amplifier

Car audio host

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