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Samsung DTOS403LH122B tuner is used as the main part of the front-end. A horizontal 
mounted  and  Digital  Half-Nim  tuner  is  used  which  covers  3  Bands(From  48MHz  to 
862MHz for COFDM, from 45.25MHz to 863.25MHz for CCIR CH). The tuning is available 
through the digitally controlled I2C bus (PLL). Below you will find info about the tuner.

The  Tuner  covers  3  Bands(from  48MHz  to  862MHz  for  COFDM,  from  48.25MHz  to 
863.25MHz for CCIR CH). Band selection and Tuning are performed digitally via the I2C 
bus.

 Digital Half-NIM tuner for COFDM

 Covers 3 Bands(From 48MHz to 862MHz for COFDM, from 48.25MHz to 

863.25MHz for CCIR CH)

 Including IF AGC with SAW Filter

 Bandwidth Switching (7/8 MHz) possible

 DC/DC Converter built in for Tuning Voltage

 Internal(or External) RF AGC, Antenna Power Optional

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

The DC voltages required at various parts of the chassis and inverters are provided by a 
main  power  supply  unit.  The power supply generates  24V, 12V,  5V,  3,3V and  5V,  3,3V 
stand  by mode DC voltages. Power stage  which is on-chasis generates 1,26V stand by 
voltage and 8V, 2.5V, 1,8V, 1,2V and 1V supplies for other different parts of the chassis.