LC-40CT2E (serv.man2) - Sharp TV Service Manual (repair manual). Page 18

17MB38 uses a 10W Class D Stereo Single Ended Audio Amplifer for audio. 

The MP7721 

is  a  stereo  10W  Class  D  Audio  Amplif

ier.  It  is  one  of  MPS’  second  generation of  fully 

integrated  audio  amplifiers  which dramatically  reduces  solution  size  by  integrating the 
following:

 180mΩ power MOSFETs

 Startup / Shutdown pop elimination

 Short circuit protection

 Mute / Standby

The MP7721 utilizes a single ended output structure capable  of delivering  2 x  10W into 
8Ω speakers.  MPS  Class  D  Audio  Amplifiers  exhibit the  high  fidelity  of  a  Class  A/B 
amplifier  at efficiencies  greater  than  90%.  The  circuit  is based  on  the  MPS’  proprietary 
variable frequency topology that delivers low distortion, fast response time and operates 
on a single power supply.

 2 x 10W Output at VDD = 24V into a 8Ω load

 THD+N = 0.06% at 1W, 8Ω

 93% Efficiency at 10W

 Low Noise (190µV Typical)

 Switching Frequency Up to 1MHz

 9.5V to 24V Operation from a Single Supply

 Integrated Startup and Shutdown Pop Elimination Circuit

 Thermal and Short Circuit Protection

 Integrated 180mΩ Switches

 Mute/Standby Modes (Sleep)

 Thermally Enhanced 20-Pin TSSOP Package with Exposed Pad

Applications
 Surround Sound DVD Systems

 Televisions

 Flat Panel Monitors

 Multimedia Computers

 Home Stereo Systems