MB3782PF FUJITSU [Fujitsu Component Limited.], MB3782PF Datasheet - Page 4
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MB3782PF
Manufacturer Part Number
MB3782PF
Description
ASSP Power Supplies BIPOLAR Switching Regulator Controller
Manufacturer
FUJITSU [Fujitsu Component Limited.]
Datasheet
1.MB3782PF.pdf
(27 pages)
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4
MB3782
BLOCK DIAGRAM
DTC1
DTC2
DTC3
+ IN1
– IN1
– IN2
– IN3
SCP
FB1
FB2
FB3
13
12
11
18
16
14
17
4
5
6
7
SCP Comp.
1.25 V
Triangular wave
R
3
T
oscillator
+
–
–
+
1.25 V
–
+
1.25 V
Error Amp.1
Error Amp.2
Error Amp.3
1 A
–
–
–
+
C
2
T
2.1 V
S
Latch
2.5 V
R
PWM Comp.
PWM Comp.
PWM Comp.
V
+
+
–
+
+
–
+
+
–
V
REF
1
Reference
REF
voltage
source
U.V.L.O.
Power on/off
V
20
CC
control
circuit
Ch.1
Ch.2
Ch.3
CLT
19
10
15
9
8
GND
OUT1
OUT2
OUT3