MB3782 Fujitsu Media Devices, MB3782 Datasheet - Page 4

• Manufacturer Part Number: MB3782
• Description: Switching Regulator Controller
• Manufacturer: Fujitsu Media Devices

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DataSheet
4
4
MB3782
U
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BLOCK DIAGRAM
DTC1
DTC2
DTC3
+ IN1
– IN1
– IN2
– IN3
SCP
FB1
FB2
FB3
12
18
16
14
13
11
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
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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