MB39A106 Datasheet, PDF (27/46 Pages) Fujitsu Component Limited. – 2-Channel DC/DC Converter IC with Overcurrent Protection Symmetrical-Phase Type

MB39A106
■ APPLICATION EXAMPLE
A
R13
430 Ω
C10
0.022
µF
FB1
2
R10
10 kΩ
R12
6.2 kΩ
R9
13 kΩ ₁
−INE1
CS1
C11
3
L priority
Error
− ^Amp1
++
0.1 µF
VREF ^{3 µA}
1.23 V
OVP
+ ^Comp.1
CTL1
100
kΩ
Buff
9
Open : CH1 ON
L : CH1 OFF
CTL1 = H
VTH = 1.4 V
6 kΩ
−
1.38 V
B
R16
120 Ω
R15
10 kΩ
R17
3.3 kΩ
VIN
C12 FB2
0.022
µF
14
R14
13 kΩ ₁₅
L priority _Error
Amp2
−INE2
CS2
C13
13
−
++
0.1 µF
VREF ^{3 µA}
1.23 V
OVP
+ ^Comp.2
AC/DC
Converter
(12 V) CTL2
100
kΩ
Buff
−
1.38 V
10
Open : CH2 ON
L : CH2 OFF
CTL2 = H
VTH = 1.4 V
6 kΩ
L priority
PWM
++ ^Comp.1
−
Max Duty 81%
Dtr ± 6%
VCC
24
C16
0.1 µF
VB Reg.
CH1
Drv
1-1
Drv
2-1
Current
Protection
Logic
H: at OCP
118 µA
L priority PWM
Comp.2
++
−
Max Duty 81%
Dtr ± 6%
CH2
Drv
1-2
Drv
2-2
Current
Protection
Logic
H: at OCP
118 µA
6 V ^VB
22
CB1
30
OUT1-1
29
VS1
28
OUT2-1
27
26 ^PGND1
ILIM1
25
R1
1.3 kΩ
CB2
16
OUT1-2
17
VS2
18
OUT2-2
19
20 ^PGND2
ILIM2
23
R5
1.3 kΩ
C9
4.7 µF
C3 0.1 µF _A
Q1 L1
VO1
(2 V/10 A)
22
µH
C25 C18
+ _0.1
82 µF
µF
C₊ 4 _C5
0.1 µF
150
µF
C6 0.1 µF _B
Q2 L2
VO2
(5 V/5 A)
22
µH
C26 C17
+ _0.1
82 µF
µF
C₊ 7 _C8
0.1 µF
150
µF
H: at OVP
H priority
SCP Comp.
3.1 V
CTL
CTL1
CTL2
Latch1
SQ
R
H: UVLO
release
H: at OVP
H: at OVP
H: at OCP
H: at SCP
10 µA
CSCP
11
C14
0.01 µF
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
R8
47 kΩ
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
C15
0.1 µF
7
SGND
NC
4
NC
21
R4
100 kΩ
CTL
6
H : ON (Power/ON)
L : OFF (Standby mode)
VTH = 1.4 V
27