Digital Equipment 21BM18, Service Manual

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SERVICE MANUAL
3
4
3). Pin Configuration and Functions
Fig.19
3.1) Pin function for STR-G5653
Pin No. Symbol Function Description
1 D MOSFET drain
2 S MOSFET source
3 GND Ground
4 V
IN
Supply voltage input for control circuit
5 OCP/FB Over-current protection detection signal/ voltage-limiting signal input
3.2) Pin function for STR-F6654
Pin No. Symbol Function Description
1 OCP/FB Over-current protection detection signal/ voltage-limiting signal input
2 S MOSFET source
3 D MOSFET drain
4 V
IN
Supply voltage input for control circuit
5 GND Ground
4). Difference between STR-G5653 and STR-F6654
a. Different size: STR- F6654 is larger
b. Different pin functions
c. Different electric characteristics: Larger power output, switching current, avalanche-rated and
internal allowable power consumption for STR-F6654
d. internal allowable power consumption for STR-F6654