mb3881pff Fujitsu Microelectronics, Inc., mb3881pff Datasheet - Page 30

• Manufacturer Part Number: mb3881pff
• Description: 8-ch Dc/dc Converter Ic With Synchronous Rectifier For Voltage Step-up And Step-down
• Manufacturer: Fujitsu Microelectronics, Inc.

30
MB3881
APPLICATION EXAMPLE
• General view
(3.6 V)
Vin
130 k
15 k
R37
12 k
20 k
20 k
16 k
R33
24 k
39 k
13 k
R46
24 k
39 k
13 k
R35
24 k
R43
threshold
R17
R18
R19
R20
R21
R22
R23
R24
R25
control
R27
control
signal
voltage
setting
voltage
R29
R30
Motor
signal
Motor
Over
R31
R39
C
D
5.1
k
k
G
k
A
B
E
F
15
75
nousity switching
30 k
R40
10 k
R49
10 k
R41
36 k
C30
0.1 F
C32
0.1 F
Back light lumi-
24 k
R48
24 k
H
0.1 F
0.1 F
R34
47 k
0.1 F
R47
47 k
0.1 F
R36
47 k
0.1 F
R26
20 k
0.1 F
R28
20 k
0.1 F
signal
R38
47 k
0.1 F
R32
10 k
R16
1 k
C21
1 k
C22
R10
1 k
C23
R11
1 k
C24
R12
1 k
C25
R13
1 k
IN5(C)
C26
R14
1 k
IN6(C)
C27
R15
1 k
C28
68 k
CTL-2
CTL-3
CTL-4
R9
DTC1
DTC2
DTC3
DTC4
DTC5
DTC6
IN8(C)
FB8
DTC8
R42
20 k
3 V 5 V
FB1
FB2
FB3
FB4
FB5
FB6
IN6
47 k
FB7
IN7
DTC7
IN8(C)
IN5
OVP
R44
IN8
IN8
CS
VB
Synchronous signal
IN1
IN2
IN3
IN4
IN5
IN6
IN7
C46
1 F
0 V
47
46
48
44
43
45
41
40
42
38
37
39
20
21
23
22
19
14
15
17
16
18
13
10
11
12
29
30
31
32
36
9
4
5
6
7
8
3
SYNC
35
12 k
R45
RT
33
CH2
CH3
CH1
CH4
CH5
CH6
CH7
CT
CH8
34
100 pF
C31
CSCP
26
0.1 F
VREF
C29
24
GND
25
58
50
49
52
51
53
54
56
57
55
59
60
63
61
62
64
27
28
2
1
VCC(O)-1
OUT1-1
VSS(O)-1
VDD(O)
OUT1-2
OUT2-1
3900 pF
OUT2-2
OUT3
3900 pF
OUT4
3900 pF
GND(O)-1
VCC(O)-2
OUT5
470 pF
VSS(O)-2
OUT6
680 pF
OUT7
2200 pF
RB8
GND(O)-2
OUT8
VCC
CTL-1
R6
1 k
R7
100
C14
C15
C16
R5
3 k
C17
C18
C19
R2
75
R3
75
R4
75
R8
12 k
2200 pF
VSS(0)
(1.8 V)
C20
C13
100 pF
VCC(0)
(5.8 V)
R1
240
H : ON (Power/CH1, 3, 4, 8)
L : OFF (Standby mode)
1 F
1 F
1 F
1 F
1 F
1 F
1 F
C40
1 F
C41
1 F
C33
C34
C35
C36
C37
C38
C39
Q1
Q2
Q3
Q4
Q5
Q6
Q7
15 H
D8
D9
6.8 H
6.8 H
15 H
Q8
L2
L10
Q9 D1
L4
L6
C8
C9
C10
C11
T1
Q10 D2
A
2.2 F
2.2 F
33 H
2.2 F
2.2 F
2.2 F
D10
L1
D3
D4
D5
D6
D7
D11
D12
D13
C1
B
C
D
E
F
G
H
15 H
2.2 F
15 H
2.2 F
15 H
2.2 F
33 H
2.2 F
33 H
2.2 F
15 H
2.2 F
C42
1 F
(2.0 V)
L3
L5
L7
L8
L9
L11
1 F
Vo1
C2
C3
C4
C5
C6
C7
C44
(DRUM)
(5.0 V)
1 F
1 F
(CAP)
C43
C45
(2.8 V)
(5.0 V)
(B.L)
Vo4
Vo5
Vo6
Vo7
Vo2
Vo3
Vo8-1
(15 V)
<CCD>
Vo8-2
(7 V)
<LCD>
Vo8-3
( 7 V)
<CCD>
Vo8-4
( 15 V)
<LCD>
A
C
B
(64 pin)