TDA8932B/33(B) Class D Audio Amplifier in Single Supply Single Ended Configuration

The following circuit diagram is a simplified application circuit of the TDA8932B/33(B) device when operated from an asymmetrical supply (single supply). Here’s the circuit diagram:

To simplify the design for an asymmetrical supply in SE configuration, the TDA8932B/33(B) is equipped with three integrated half supply voltages buffers. The first buffer is for the reference decoupling capacitor (Chvpref) on HVPREF (pin 11) and the rest (two other buffers) are for the two AC-couple capacitors (Cse) in series with the speaker. [Source: NXP Application Note]