MITSUMI
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