TPA6304-Q1 Texas instruments

TPA6304-Q1

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TPA6304-Q1

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Описание

The TPA6304-Q1 device is a four-channel analog-input Class-D Burr-Brown™ audio amplifier that implements a 2.1 MHz PWM switching frequency that enables a cost optimized solution in a very small 2.7 cm2 PCB size, high impedance single ended inputs and full operation down to 4.5 V for start/stop events.The TPA6304-Q1 Class-D audio amplifier has an optimal design for use in entry level automotive head units that provide analog audio input signals as part of their system design. The Class-D topology dramatically improves efficiency over traditional linear amplifier solutions.The output switching frequency can be set either above the AM band, which eliminates the AM band interference and reduces output filter size and cost, or below AM band to further optimize efficiency.The device is offered in a 44 pin HTSSOP package with the exposed thermal pad up.

Highest efficiency Class-D
- Significantly more efficient than Class-AB
- Reduce thermal solution with 75% less heat dissipation than Class-AB
Start/stop operation down to 4.5 V
AEC-Q100 Qualified for automotive applications:
- Temperature grade 1: –40°C to 125°C T_A
- HBM ESD Classification level 2
- CDM ESD Classification level C2B
27 W, 10% THD into 4 Ω at 14.4 V
- Drives 4 Ω and 2 Ω loads
Load diagnostics
- Output open, shorted load
- Output-to-battery or ground shorts
- Tweeter connected
Designed with advanced gate drive to meet CISPR25-L5 EMC specification
- Class-D at 2.1 MHz, no AM interference
- Spread Spectrum mode, Phase Offset, Slew Rate Control
Protection
- 40 V Load dump
- Output short protection
- DC offset and over temperature
- Fortuitous open ground and power tolerant
Audio inputs
- 4 Channel single-ended analog input
- 10 dB, 16 dB, 22 dB or 28 dB Gain option
Supports parallel channel drive (PBTL)
Audio performance into 4 Ω at 14.4 V, 1 kHz
- THD+N < 0.006%
- 42 µV_RMS Output Noise
- 80 dB PSRR
- Efficiency > 80%
Special features
- Programmable clip detection
- Load current limiter
- Thermal gain foldback
- Fast and autonomous startup diagnostics
- AC load impedance measurement with < 10 mA load current

Audio input type	Analog Input
Architecture	Class-D
Speaker channels (max)	4
Rating	Automotive
Power stage supply (max) (V)	18
Power stage supply (min) (V)	4.5
Load (min) (Ω)	2
Output power (W)	45
THD + N at 1 kHz (%)	0.09
Iq (typ) (mA)	175
Control interface	I2C
Closed/open loop	Closed
Analog supply (min) (V)	4.5
Analog supply (max) (V)	18
Sampling rate (max) (kHz)	96
PSRR (dB)	75
Operating temperature range (°C)	-40 to 125