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5.14 STR-G6551-F8 (IC901) : Switch regulator
• Block diagram
• Pin function
Pin No.
Symbol
1
D
Drain terminal
2
S
Source terminal
3
GND
Ground terminal
4
Vin
Power supply terminal
5
O.C.P/F.B
Over current / Feedback terminal
5.15 TC74HC08AF-X(IC704) : 2-input and gate
• Pin layout
Description
MOS FET drain
MOS FET source
Ground
Input of power supply for control circuit
Input of over current detection signal and constant voltage
control signal
• Truth table
A
L
L
H
H
Function
B
Y
L
L
H
L
L
L
H
H
XV-NA7SL
47
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