MB39A112 Datasheet, PDF (4/35 Pages) Fujitsu Component Limited. – 3-ch DC/DC Converter IC

MB39A112
s BLOCK DIAGRAM
−INE1 2
VREF
10 µA
CS1 1
FB1 3
L
priority
Threshold voltage
1.0 V ± 1%
Error
− ^Amp1
++
1.0 V
PWM
Comp.1
+
−
CH1
Drive1
Pch
IO = 150 mA
20 VCCO
19 OUT1
−INE2 9
VREF
10 µA
CS2 10
FB2 8
L
priority
Threshold voltage
1.23 V ± 1%
Error
− ^Amp2
++
1.23 V
PWM
Comp.2
+
−
CH2
Drive2
Pch
IO = 150 mA
18 OUT2
−INE3 12
VREF
10 µA
CS3 11
Threshold voltage
1.23 V ± 1%
Error
− ^Amp3
++
FB3 13
L
priority
1.23 V
H
priority
SCP
Comp. +++
−
2.7 V
CSCP 14
SCP
2.5 V
2.0 V
H: at SCP
H: UVLO release
OSC
UVLO
PWM
Comp.3
+
−
CH3
Drive3
Pch
IO = 150 mA
VCCO − 5 V
Bias
Voltage
VH
Error Amp Power Supply
SCP Comp. Power Supply
bias
3.5 V
ErrorAmp Reference
1.0 V/1.23 V
VREF
Power
VR ON/OFF
CTL
GND
5
6
RT CT
7
GND
17 OUT3
16 VH
15 GNDO
4 VCC
4