MM1548 データシートの表示（PDF） - Mitsumi

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MM1548

Secondary Control for Energy-Saving AC Adaptor

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Secondary Control for Energy-Saving AC Adaptor MM1548

Timing Chart

Load / Energy-saving detection

Load current decrease

Load current decrease

5 Load current

Load detection current

(200mV/RLS)

Energy saving current

(115mV/RLS) 0mA

1 VCC PIN

2 OUT PIN

5.1V

4.9V

115mV

200mV

3 PO1 PIN

0V

Open

Low(Load 5kΩ)

VCC

OUT

4 CNT PIN

Open

Control

Load current increase

Load current increase

5 Load current

Load detection current

(200mV/RLS)

Energy saving current

(115mV/RLS) 0mA

1 VCC PIN

2 OUT PIN

5.1V

4.9V

200mV

3 PO1 PIN

0V

Open

Low(Load 5kΩ)

VCC

OUT

4 CNT PIN

Open

AC input

Rectifying

circuit

Delay circuit

Switching

interruption

control

Switching

circuit

Control

Smoothing

circuit

1

2

RLS

5 Output

+

4

VCC CNT OUT

MM1548

PO1 GND CS

RCS

–

3

signal detection

circuit

Photocoupler

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