Buffalo FTD-G731AS Service Manual page 14

BA9741F: PWM control, voltage range for working: 3.6~35V, Has such functions as short-voltage
protection, Over-voltage protection, over-current protection and etc. The function of each pin and the circuit
diagram inside are as follows:
PIN NAME
1 CT External timing capacitor
2 RT External timing resistor
3 1IN+ Positive input for error amplifier 1
4 1IN- Positive input for error amplifier 2
5 1FBK Error amplifier 1 output
Output 1 dead time/soft start
6 1DTC
setting
7 1OUT Output 1
8 GND Ground
FUNCTION PIN NAME
9 VCC Power supply
10 2OUT Output 2
11 2DTC Output 2 dead time/soft start setting
12 2FBK Error amplifier 2 output
13 2IN+ Positive input for error amplifier
14 2IN- Positive input for error amplifier
15 SCP Timing latch setting
16 REF Reference voltage output (2.5v)
14
BUFFALO Service Manual
FUNCTION