MB39A104 Datasheet, PDF (4/36 Pages) Fujitsu Component Limited. – 2-ch DC/DC Converter IC

MB39A104
s BLOCK DIAGRAM
−INE1 10 _VREF
10 µA
CS1 11
1.24 V
FB1 9
Error
− ^Amp1
++
L priority
DTC1 6
−INE2 15 _VREF
10 µA
CS2 14
FB2 16
DTC2 19
1.24 V
Error
− ^Amp2
++
L priority
H: at SCP ^{H priority}
SCP
Comp.
L priority
PWM
++ ^Comp.1
−
CH1
Drive1
Pch
IO = 200 mA
at VCCO = 12 V
Current
Protection
Logic
L priority
PWM
++ ^Comp.2
−
CH2
Drive2
Pch
IO = 200 mA
at VCCO = 12 V
Current
Protection
Logic
1 VCCO
3 OUT1
4 VS1
5 ILIM1
22 OUT2
21 VS2
20 ILIM2
CSCP 8
(3.1 V)
SCP
Logic
UVLO
H:UVLO
release
OSC
12 13
RT CT
2.5 V
1.5 V
bias
Accuracy
±1%
5.0 V
17
VREF
H: at OCP
VCC − 5 V
VH
Bias
Voltage
Error Amp Power Supply
Error Amp Reference
1.24 V
Power
VREF VR1 ON/OFF
CTL
18
GND
2 VH
23 GNDO
7 VCC
24 CTL
4