PMP9774
適用於音訊功率放大器並採用 TPS61088 的封包追蹤電源參考設計
PMP9774
概覽
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.
特點
- 2.7-4.2V input voltage range
- 5.5-11.75V output voltage range
- The output voltage changes linearly with the amplitude of the input audio signal
- Output voltage rise up from 5.5V to 11.75V within 1ms under a full range step up of the audio signal
- Higher efficiency compared to that of the traditional fixed supply PA
| 輸出電壓選項 | PMP9774.1 |
|---|---|
| Vin (最小值) (V) | 2.7 |
| Vin (最大值) (V) | 4.2 |
| Vout (Nom) (V) | 5.5 |
| Iout (最大) (A) | 2 |
| 輸出功率 (W) | 11 |
| 隔離式/非隔離式 | Non-Isolated |
| 輸入類型 | DC |
| 拓撲結構 | Boost- Synchronous |
已開發完全組裝的電路板，僅供測試與性能驗證，且為非賣品。
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| 類型 | 標題 | 下載最新的英文版本 | 日期 | |||
|---|---|---|---|---|---|---|
| * | 測試報告 | Envelope-Tracking Power Supply for Audio Power Amplifiers TPS61088 Design Guide | 2015/9/10 |