mm1548 Mitsumi Electronics, Corp., mm1548 Datasheet - Page 3

• Manufacturer Part Number: mm1548
• Description: Secondary-side Control For Energy-saving Ac Adaptor
• Manufacturer: Mitsumi Electronics, Corp.

MITSUMI
Pin Description
Pin No.
1
2
3
4
5
6
Pin Name
GND
OUT
CNT
PO1
V
CS
CC
Output (+) pin.
Connect Registor for load detection
between V
of PNP power transistor.
PNP power transistor control pin.
Connect base of PNP power transistor.
(+) power supply pin.
This pin doubles load detection pin.
Connect load detection resistor
between OUT pin, and connect emitter
of PNP power transistor.
Photo diode drive pin of photocoupler
for constant-current and constant-
voltage control.
Connect to cathode of diode.
Ground pin.
Overcurrent detection pin.
This pin doubles as output- pin.
Connect Resistor for overcurrent
detection between GND pin.
CC
pin, and connect collector
Function
Secondary-side Control for Energy-Saving AC Adaptor MM1548
Internal equivalent circuit
3
1
6
1.25V
V
CC
4
2
V
CC