Introduction Of Main Ic - Buffalo FTD-G731AS Service Manual

6.2 Introduction of main IC

TSU16AK-LFT: the MST8111B is a high performance, and fully integrated graphics processing IC solution for
LCD monitors with resolutions up to XGA. It is configured with an integrated triple-ADC/PLL, a high quality scaling
engine, an on-screen display controller, a built-in output clock generator, and LVDS display interface. To further
reduce system costs, the MST8111B also integrates intelligent power management control capability for green-mode
requirements and spread-spectrum support for EMI management.
SG6841D: PWM control, low start-up current (30uA) and low working current (3mA). The circuit unit has
functions such as low-voltage protection, over-current protection, over-voltage protection, Temperature protection
and etc. The function of each pin and the inside circuit diagram are as follows:
Pin NAME
1 GND
2
3 VIN
4
FUNCTION
Ground
FB Feedback voltage input
Start-up current input
RI Reference setting
Pin NAME
5 RT Temperature protection
6 SENSE Current test pin
7 VDD Power supply
8 GATE PWM drive output
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BUFFALO Service Manual
FUNCTION