Envelope-Tracking Power Supply Reference Design for Audio Power Amplifiers with TPS61088
Description
This reference design delivers an envelope-tracking power supply circuit for audio power amplifier (PA) with TPS61088. By adding an audio envelope signal to the FB pin: the TPS61088’s output voltage can change in accordance with the envelope of the audio signal. So the TPS61088 provides a dynamically changing supply voltage to the PA. Thus the PA can always keep high efficiency in the whole output power range.
Features
- 2.7-4.2V input voltage range5.5-11.75V output voltage rangeThe output voltage changes linearly with the amplitude of the input audio signalOutput voltage rise up from 5.5V to 11.75V within 1ms under a full range step up of the audio signalHigher efficiency compared to that of the traditional fixed supply PA
Applications
- AV receiver
- Tablet (multimedia)
- Chromebook & WOA
- Smartphone
- Standard notebook PC
Product Categories
- Power management
| Download the bill of materials for PMP9774 | Download |
Test Data
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Download the test file for PMP9774| Title | Updated | Type | Size (KB) | |
|---|---|---|---|---|
| PMP9774 Gerber | 08 Dec 2015 | ZIP | 616 | |
| PMP9774 CAD Files | 08 Dec 2015 | ZIP | 1536 | |
| PMP9774 PCB | 08 Dec 2015 | 726 | ||
| PMP9774 Assembly Drawing | 08 Dec 2015 | 128 | ||
| PMP9774 BOM | 08 Dec 2015 | 122 | ||
| PMP9774 Schematic | 08 Dec 2015 | 353 |