MB3875 Fujitsu Media Devices, MB3875 Datasheet - Page 5
MB3875
Manufacturer Part Number
MB3875
Description
DC/DC Converter IC for Charging
Manufacturer
Fujitsu Media Devices
Datasheet
1.MB3875.pdf
(27 pages)
- Current page: 5 of 27
- Download datasheet (294Kb)
BLOCK DIAGRAM
OUTC1
OUTC2
INC1
INC1
INC2
INC2
INE1
INE1
INE2
INE2
INE3
FB1
FB2
FB3
IN3
CS
11
10
13
12
24
16
15
22
8
9
6
4
1
7
3
2
<Current Amp.1>
<Current Amp.2>
<SOFT>
VREF
1 A
R2
50 k
R1
25
25
2.5 V
1.5 V
(4.2 V)
VREF
<Error
<Error
<Error
Amp.1>
Amp.2> VREF
Amp.3> VREF
(45 pF)
VREF
<OSC>
RT
17
<PWM
VREF
Comp.>
bias
(V
<REF>
Bias voltage
block
:
CC
MB3875 100 k
MB3877 150 k
<VH>
5
V
<UVLO>
UVLO)
VREF
ULVO
CC
(0.77 V)
<OUT>
0.91 V
GND
MB3875/MB3877
<CTL>
215 k
V
23
35 k
(V
Drive
CC
CC
V
CC
5 V)
21
20
19
18
14
V
OUT
VH
V
CTL
CC
CC
(O)
5
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