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TIDA-020033
Automotive Class-H audio and tracking power supply reference design
TIDA-020033
Overview
This reference design demonstrates a Class-H audio and tracking power supply audio subsystem. The TAS6584-Q1 audio amplifier tracks the envelope of the digital audio input and adjusts the LM5123-Q1 boost output voltage to meet the power efficiency requirements without the need for an external microcontroller. This reference designs leads to improved efficiency, thermal performance, and a smaller total footprint. In addition, this reference design allows for a Class-H implementation to be plug-and-play with minimal software changes to the rest of the automotive audio architecture.
Features
- Self-contained Class-H control allows for simplified implementation in external amplifier applications and minimizes the need for additional digital power controller or software
- Includes an input protection circuit to protect against external transients, reverse battery conditions, and system overcurrent events
- This reference design uses TAS6584-Q1, which is the first 45-V automotive Class-D audio amplifier with integrated current sense and integrated Class-H control in the industry. This design delivers maximum output power and high fidelity audio
- The design also contains LM5123-Q1, which is a 2.2-MHz wide-VIN low-IQ synchronous boost controller with a TRACK pin for simplified tracking power-supply design
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
Design files & products
Design files
Download ready-to-use system files to speed your design process.
TIDUA71.PDF (867 K)
Reference design overview and verified performance test data
Products
Includes TI products in the design and potential alternatives.
Boost controllers (external switch)
LM51231-Q1 — 2.2-MHz wide-VIN, synchronous boost controller with output voltage tracking
Data sheet: PDF | HTMLSpeaker amps
TAS6584-Q1 — Automotive 45-V, 10-A digital input, four-channel Class-D audio amplifier with current sense
Data sheet: PDF | HTMLTechnical documentation
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| Type | Title | Date | ||
|---|---|---|---|---|
| Design guide | Automotive Class-H Audio and Tracking Power Supply Reference Design | PDF | HTML | Jan. 10, 2022 |
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