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MB39A104
4
BLOCK DIAGRAM
+
+
+
+
+
+
+
+
+
+
+
+
10
VREF
VREF
11
9
6
15
14
16
19
8
INE1
CS1
FB1
DTC1
INE2
CS2
FB2
DTC2
CSCP
12 13 1817
RT CT GNDVREF
24
7
23
2
20
21
22
5
4
3
1
CTL
VCC
GNDO
VH
ILIM2
VS2
OUT2
ILIM1
VS1
OUT1
VCCO
10 µA
1.24 V
1.24 V
(3.1 V)
SCP
Comp.
SCP
Logic
UVLO
OSC
VREF
Bias
Voltage
Current
Protection
Logic
Current
Protection
Logic
I
O = 200 mA
at VCCO = 12 V
IO = 200 mA
at VCCO = 12 V
VR1
VH
V
CC 5 V
1.24 V
2.5 V
1.5 V
5.0 V
bias
Power
ON/OFF
CTL
10 µA
Pch
Drive2
Pch
Drive1
PWM
Comp.1
PWM
Comp.2
Error
Amp2
Error
Amp1
CH1
CH2
L priority
L priority
L priority
L priority
Accuracy
±1%
H:UVLO
release
H: at OCP
H priority
H: at SCP
Error Amp Reference
Error Amp Power Supply