MB39A112EVB-01
5. Connection Diagram
Step-down
VD1
A
R6
R7
Q1
VCCO
20
2.2 kΩ
18 kΩ
R4
L1
MCH3312
−INE1
VO1
1.2 V
lo1 = 0.8 A to 1.5 A
A
2
1
CH1
VREF
L
Error
Amp1
PWM
R8
100 kΩ
0 Ω
2 μH
C17
0.1 μF
10 μA
Comp.1
−
C2
4.7 μF
Q4
CS1
Drive1
+
−
R1
+
+
D1
SBE001
OUT1
CTL1
R9
820 Ω
19
Pch
*
C1
C7
0.1 μF
GND1
0 Ω
2.2 μF
1.0 V
R19
priority
FB1
C8
*
3
9
Io = 150 mA
0.022 μF
CH1 ON/OFF signal
(L:ON, H:OFF)
R11
Step-down
a
VD2
B
R12
Q2
4.7 kΩ 56 kΩ
L2
MCH3312
−INE2
VO2
3.3 V
B
CH2
VREF
Error
Amp2
R13
36 kΩ
Q5
PWM
Comp.2
+
−
3.3 μH
10 μA
lo2 = 0.15 A to 1 A
−
C4
CS2
Drive2
R2
+
+
4.7 μF
10
D2
SBE001
OUT2
CTL2
R14
820 Ω
*
Pch
18
C12
0.1 μF
C3
GND2
0 Ω
L
2.2 μF
1.23 V
R20
priority
FB2
C11
*
8
0.01 μF
Io = 150 mA
CH2 ON/OFF signal
(L:ON, H:OFF)
Step-down
b
VD3
C
R15
680 Ω 30 kΩ
R16
Q3
L3
MCH3308
−INE3
VO3
5.0 V
CH3
C
12
VIN
(12 V)
VREF
Error
Amp3
PWM
Comp.3
R17
10 kΩ
Q6
10 μH
10 μA
lo3 = 0.15 A to 0.3 A
−
C6
Drive3
CS3
+
−
R3
+
+
4.7 μF
11
13
D3
SBS005
OUT3
Pch
CTL3
R18
1 kΩ
*
17
16
C13
0.1 μF
C5
GND3
0 Ω
L
2.2 μF
1.23 V
R21
priority
GND
FB3
C14
*
0.01 μF
Io = 150 mA
C16
0.1 μF
CH3 ON/OFF signal
(L:ON, H:OFF)
H priority
c
SCP
Comp.
VH
VCCO
− 5 V
+
+
+
−
Bias
Voltage
VH
2.7 V
GNDO
VCC
15
4
SCP
OSC
Error Amp power supply
SCPComp. power supply
Charge
current
H: at SCP
H:UVLO
CSCP
1
A
14
R5
OPEN
L
2.5 V
2.0 V
SW1
C15
1000 pF
Error Amp
reference
bias
3.5 V
0 Ω
CS1
CS2
release
a
b
c
(1.0 V/1.23 V)
C9
0.1μF
Power
VREF
UVLO
VR ON/OFF
CS3
NC
CTL
GND
5
6
7
RT
CT
GND
All channels are ON state
in above diagram
R10
5.1 kΩ
C10
100 pF
ICGND
<20 Pin>
* : Not mounted
Document Number: 002-08322 Rev. *A
Page 6 of 23
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