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TPA6304-Q1
45-W, 2.1-MHz analog input 4-channel automotive Class-D Burr-Brown™ audio amplifier
Data sheet
TPA6304-Q1
- 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 TA
- 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 µVRMS 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
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.
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Technical documentation
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View all 7 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPA6304-Q1 45-W, 2.1-MHz Analog Input 4-Channel Automotive Class-D Burr-Brown™ Audio Amplifier with Load Dump Protection and I2C Diagnostics datasheet (Rev. B) | PDF | HTML | 11 Dec 2020 |
| Application note | Understanding Thermal Capabilities of Automotive Class-D Amplifiers (Rev. A) | PDF | HTML | 08 Jun 2021 | |
| EVM User's guide | TPA6304-Q1 Evaluation Module (Rev. A) | PDF | HTML | 14 Oct 2020 | |
| Technical article | Concerned about transitioning from Class-AB to a Class-D? Well, you shouldn’t be. | PDF | HTML | 10 Oct 2019 | |
| White paper | Automotive Audio Design Considerations to Minimize Amplifier Size & Thermal Load | 09 Oct 2019 | ||
| Application brief | Diagnostics and Protections in Automotive Audio Systems (Rev. A) | 24 Sep 2019 | ||
| Application note | Inductor Selection Guide for 2.1 MHz Class-D Amplifiers (Rev. A) | 05 Sep 2019 |
Design & development
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Evaluation board
TPA6304Q1EVM — 2.1-MHz analog input 4-channel automotive Class-D audio amplifier evaluation module
The TPA6304-Q1 evaluation module showcases the industry's smallest 2.1-MHz 4-channel Analog Input Class-D Audio solution for Automotive Infotainment applications. TPA6304-Q1’s 2.1-MHz switching frequency allows customers to significantly reduce inductor size and cost and optimize total (...)
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Reference designs
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (DDV) | 44 | Ultra Librarian |
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