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MB3788
BLOCK DIAGRAM
Channel 1
+IN1 (E)
8
-IN1 (E)
7
FB1
6
0.6 V
-IN1 (C)
9
Channel 2
+IN2 (E)
17
-IN2 (E)
18
FB2
19
0.6 V
-IN2 (C)
16
SCP comparator
Timer circuit
1 A
SCP
15
4
Error amplifier 1
+
+
-
-
Comparator 1
+
-
Error amplifier 2
+
+
-
-
Comparator 2
+
-
-
-
+
2.1 V
V
REF
Low input
SR latch
voltage
circuit
protection
circuit
OFF current setting
PWM comparator 1
OFF current setting
PWM comparator 2
1.9 V
1.3 V
Reference
Power/channel
voltage
power (2.5 V)
10
12
-IN(PWM)
V
REF
Cb1
4
5
Ca1
V
(out)
1
CC
OUT1
2
3
VE1
1.5 V
Ca2
20
21
Cb2
OUT2
23
22
VE2
1.5 V
CTL2
14
V
CC
11
ON/OFF
CTL1
13
circuit
24
GND
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