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MB39A106 Datasheet, PDF (4/46 Pages) Fujitsu Component Limited. – 2-Channel DC/DC Converter IC with Overcurrent Protection Symmetrical-Phase Type | |||
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MB39A106
â BLOCK DIAGRAM
FB1 2
âINE1 1
L priority
CS1 3
VREF 3 µA
100
kâ¦
Buff
CTL1 9
Open : CH1 ON
L : CH1 OFF
CTL1 = H
VTH = 1.4 V
6 kâ¦
Error
â Amp1
++
1.23 V
OVP
+ Comp.1
â
1.38 V
L priority
PWM
++ Comp.1
â
Max Duty 81%
Dtr ± 6%
VCC
24
VB Reg.
CH1
Drv
1-1
Drv
2-1
Current
Protection
Logic
H: at OCP
118 µA
6V
22 VB
30 CB1
29 OUT1-1
28 VS1
27 OUT2-1
26 PGND1
25 ILIM1
FB2 14
âINE2
CS2
L priority
15
13
VREF 3 µA
Error
Amp2
â
++
1.23 V
OVP
+ Comp.2
100
kâ¦
Buff
CTL2 10
Open : CH2 ON
L : CH2 OFF
CTL2 = H
VTH = 1.4 V
6 kâ¦
â
1.38 V
L priority PWM
Comp.2
++
â
Max Duty 81%
Dtr ± 6%
CH2
Drv
1-2
Drv
2-2
Current
Protection
Logic
H: at OCP
OCP
Comp.2
118 µA
16 CB2
17 OUT1-2
18 VS2
19 OUT2-2
20 PGND2
23 ILIM2
H: priority
SCP Comp.
H: at OVP
3.1 V
CTL
CTL1
CTL2
Latch1
SQ
R
H: at OVP
H: at OVP
H: at OCP
H: at SCP
10 µA
CSCP 11
CTL
CTL1
CTL2
VREF
SR
Latch
Latch2
UVLO
OSC
3.0 V
CT1
1.8 V
3.0 V
CT2
1.8 V
45 pF
5
RT
H: at
UVLO release
L: at protection
operation
PWRGOOD
12
Protection
control
signal
to Error amp reference
bias
1.23 V VCC
VREF
Power
VR1 ON/OFF
CTL
3.5 V
8
VREF
7
SGND
4 NC
21 NC
6 CTL
H : ON (Power On)
L : OFF (Standby mode)
VTH = 1.4 V
4
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