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.
| Output voltage options | PMP9774.1 |
|---|---|
| Vin (Min) (V) | 2.7 |
| Vin (Max) (V) | 4.2 |
| Vout (Nom) (V) | 5.5 |
| Iout (Max) (A) | 2 |
| Output Power (W) | 11 |
| Isolated/Non-Isolated | Non-Isolated |
| Input Type | DC |
| Topology | Boost- Synchronous |
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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| Type | Title | Date | ||
|---|---|---|---|---|
| Test report | Envelope-Tracking Power Supply for Audio Power Amplifiers TPS61088 Design Guide | Sep. 10, 2015 |
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