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MB3782 Datasheet, PDF (4/28 Pages) Fujitsu Component Limited. – Switching Regulator Controller | |||
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MB3782
s BLOCK DIAGRAM
RT
CT
3
2
1.25 V
VREF
1
2.5 V
VCC
CLT
20
19
Triangular wave
oscillator
+ IN1 4
â IN1 5
FB1 6
DTC1 7
â IN2 13
FB2 12
DTC2 11
â IN3 18
FB3 17
DTC3 16
Error Amp.1
+
â
Error Amp.2
â
+
1.25 V
Error Amp.3
â
+
1.25 V
Reference
voltage
source
PWM Comp.
+
+
â
Power on/off
control
circuit
Ch.1
PWM Comp.
+
+
â
Ch.2
PWM Comp.
+
+
â
Ch.3
SCP Comp.
â
â
â
+
SCP 14
2.1 V
1 µA
VREF
S
R
Latch
U.V.L.O.
9 GND
8 OUT1
10 OUT2
15 OUT3
4
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