MM1548 查看數據表（PDF） - Mitsumi

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MM1548

Secondary Control for Energy-Saving AC Adaptor

Mitsumi 

MITSUMI

Block Diagram

Secondary Control for Energy-Saving AC Adaptor MM1548

Load detection resistor

RLS

PC1

RLB

Primary-side switching

control

RL1

PO1

4

VCC

3

Photocoupler-turn-off

CNT

2

OUT

1

Voltage buffer

Input/output difference control

(VCC-OUT=200mV)

Load detection(current)

(115mV 200mV)

1.25V

Reference voltage

VCC=4.6V

VCC

5k

Over voltage

detection

(7V)

Load detection(voltage)

(VCC=3.5V)

Constant voltage control

(VCC=5.1V)

Constant current control

(CS=114.4mV)

ROS1

ROS2

5

GND

(CS=34mV)

Reference voltage decrease (drop)

6

RCS

CS

Constant current detection resistor

COUT

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