Sanyo LCD-39XR12F Service Manual page 19

2、 AMP IC APA3160
The APA3160 is a digital input, stereo, high efficiency, Class-D audio
amplifier available in a TQFP7x7-48P package.
The APA3160 accepts the digital serial audio data and using the digital
audio processor to convert the audio data becomes the stereo Class-D
output speaker amplifier. This provides the seamless integration between
the codec and the speaker amplifier.
The APA3160 is a slave device receiving clocks from external source, and
the Class-D's PWM switching frequency is 352.8kHz for the sampling rate
44.1kHz or 384kHz for sampling 48kHz, depend on the input signal's
sampling rate.