MB3881 Datasheet, PDF (30/40 Pages) Fujitsu Component Limited. – 8-ch DC/DC Converter IC with Synchronous Rectifier for Voltage Step-up and Step-down

MB3881
s APPLICATION EXAMPLE
• General view
A
R17
12 kΩ
R18
20 kΩ
FB1
47
C21
0.1 µF
R9
1 kΩ
46
−IN1
DTC1
48
B
R19
20 kΩ
R20
16 kΩ
FB2
44
C22
0.1 µF
R10
1 kΩ
43
−IN2
R33
24 kΩ
DTC2
45
R34
47 kΩ
C
R21
39 kΩ
R22
13 kΩ
FB3
41
C23
0.1 µF
R11
1 kΩ
40
−IN3
R46
24 kΩ
DTC3
42
R47
47 kΩ
D
R23
39 kΩ
R24
13 kΩ
FB4
38
C24
0.1 µF
R12
1 kΩ
37
−IN4
R35
24 kΩ
DTC4
39
R36
47 kΩ
Vin
(3.6 V)
FB5
20
E C25
0.1 µF
R25 R13
5.1 1 kΩ
kΩ
21
−IN5
R26
20 kΩ
−IN5(C) ₂₃
Motor
control
signal
22
+IN5
DTC5 ₁₉
FB6
14
F C26
0.1 µF
R27 R14
15
kΩ
1 kΩ
15
−IN6
R28
20 kΩ
−IN6(C) ₁₇
Motor
control
signal
16
+IN6
R43 24 kΩ OVP
18
Over
R44
voltage
threshold
47 kΩ
setting
voltage
DTC6 ₁₃
G
R29
75
kΩ
R30
15 kΩ
FB7
10
C27
0.1 µF
R15
1 kΩ
11
−IN7
+IN7
12
Back light lumi-
nousity switching
signal
R37 24 kΩ DTC7
9
R38
47 kΩ
CH1
CH2
CH3
CH4
CH5
CH6
CH7
VCC(O)-1
58
R1
OUT1-1 240 Ω
50
C13
49 ^{2200 pF}
VSS(O)-1
52
VDD(O)
51
OUT1-2
Vo1
A
(2.0 V)
Q1
L1
33 µH
C33
C1
1 µF Q9 D1 2.2 µF
R2
75 Ω
OUT2-1
53
C14
3900 pF
Vo2
B
(2.8 V)
Q2
C8 2.2 µF L3
15 µH
L2
15 µH
C34
1 µF
C2
Q10 D2 2.2 µF
54
OUT2-2
R3
75 Ω
OUT3
56
C15
3900 pF
Vo3
(5.0 V)
C
Q3
C9 2.2 µF L5
15 µH
L4
6.8 µH
C35
1 µF
C3
D3 2.2 µF
R4
75 Ω
OUT4
57
C16
3900 pF
Vo4
D ^{(5.0 V)}
Q4
C10 2.2 µF L7
15 µH
L6
6.8 µH
C36
1 µF
C4
D4 ^{2.2 µF}
GND(O)-1
55
59 _VCC(O)-2
R5
3 kΩ
OUT5
60
C17
470 pF
63
VSS(O)-2
Q5
C37
1 µF
Vo5
E ^(DRUM)
L8
33 µH
C5
D5 2.2 µF
R6
1 kΩ
OUT6
61
C18
680 pF
Q6
C38
1 µF
Vo6
F ^(CAP)
L9
33 µH
C6
D6 2.2 µF
R7
100 Ω
OUT7
62
C19
2200 pF
Vo7
G
(B.L)
Q7
C11 2.2 µF L11
15 µH
L10
C39 ^{15 µH}
1 µF
C7
D7 2.2 µF
H
FB8
C28
4
R31
130 kΩ
0.1 µF
R16
1 kΩ
5
−IN8
R32
10 kΩ
R39
30 kΩ
+IN8
6
R40 C46
10 kΩ 1 µF
7
R48
−IN8(C)
68 kΩ
8
R49 +IN8(C)
10 kΩ
R41 DTC8
3
36 kΩ R42
20 kΩ
CH8
CTL-2 29
CTL-3 30
CTL-4 31
C30
0.1 µF
CS
32
VB ₃₆
C32
0.1 µF
35 33 34
Synchronous signal
3V∼5V
0V
SYNC
RT
R45
12 kΩ
CT _C31
100 pF
VSS(0)
(1.8 V)
VCC(0)
(5.8 V)
OUT8
64
C20
100 pF
2
RB8
R8
12 kΩ
C40
1 µF
D8
C41
1 µF
D9
Q8
H
T1
D10
C42
1 µF
Vo8-1
(15 V)
<CCD>
Vo8-2
(7 V)
D11 C43 <LCD>
D12 1 µF Vo8-3
(−7 V)
C44 <CCD>
1 µF Vo8-4
D13
C45
1 µF
(−15 V)
<LCD>
GND(O)-2
1
VCC
27
28 CTL-1 H : ON (Power/CH1, 3, 4, 8)
L : OFF (Standby mode)
26 24 25
CSCP VREF GND
C29
0.1 µF
A
B
C
(64 pin)
30