PMP9774, Envelope-Tracking Power Supply Reference Design for Audio Power Amplifiers with TPS61088

PMP9774, Envelope-Tracking Power Supply Reference Design for Audio Power Amplifiers with TPS61088. 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 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