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MM1548

Secondary Control for Energy-Saving AC Adaptor

Mitsumi 

MITSUMI

Secondary Control for Energy-Saving AC Adaptor MM1548

Pin Description

Pin No.

1

Pin Name

OUT

Function

Output (+) pin.

Connect Registor for load detection

between VCC pin, and connect collector

of PNP power transistor.

Internal equivalent circuit

1

V CC

2

CNT

PNP power transistor control pin.

Connect base of PNP power transistor.

2

3

VCC

(+) power supply pin.

This pin doubles load detection pin.

Connect load detection resistor

between OUT pin, and connect emitter

of PNP power transistor.

3

1.25V

4

PO1

Photo diode drive pin of photocoupler

for constant-current and constant-

voltage control.

Connect to cathode of diode.

5

GND

Ground pin of this IC.

6

CS

Overcurrent detection pin.

This pin doubles as output- pin.

Connect Resistor for overcurrent

detection between GND pin.

4

V CC

6

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