MB39A132QN-G-ERE1 Datasheet, PDF (5/56 Pages) Fujitsu Component Limited. – ASSP For Power Management Applications (Rechargeable Battery) Synchronous Rectification DC/DC Converter IC for Charging Li-ion Battery

MB39A132
■ BLOCK DIAGRAM
TO
SYSTEM
LOAD
VIN
A
B
CTL2
32
VIN
24
-INE1
9
OUTC1
10
Buffer
+INC1
3
-INC1
2
<Current Amp1>
×25
ADJ1
3 mV
7
OUTC2
11
Buffer
+INC2 ^{<Current Amp2>}
12
-INC2 ₁₃
×25
3 mV
ADJ2
14
Charge
Current Control
<Error Amp1>
GM Amp
<Error Amp2>
GM Amp
-INE3
6
BATT
<UV Comp.>
C
17
VCC
0.1 V
ADJ3
18
VREF:4.20 V/Cell
2.4 V to 3.9 V:
4.35 V/Cell
1.1 V to 2.2 V:
2 × VADJ3/Cell
GND:4.00 V/Cell
CELLS ₂₅
GND: 2 Cells
OPEN: 3 Cells
VREF: 4 Cells
<SOFT>
VREF
VO
REFIN
Control
<Error Amp3>
VCC
UVLO
VREF
UVLO
VB
UVLO
GM Amp
Slope
Control
CS
19
10 μA
<Over Current Det.>
+INC2
-INC2
0.2 V
ACIN
ACOK
4
5
<AC Comp.>
<PWM Comp.>
Adaptor Det.
- 2.5 V
- 1.5 V
Off Time
Control
OSC
CT
<Sync Cnt.>
2.6 V
VB
Reg.
Drv1
VCC
1
VB
28
CB
31
OUT1
30
LX
29
Drv2
OUT2
27
PGND
26
<VR1>
<REF>
<CTL>
CTL1
23
5.0 V ON/OFF
VREF
AB
2.85 A
Io
RS
20 mΩ
C
VO
Battery
8
15
16
20
COMP1 COMP2 COMP3 RT
21
22
VREF GND
(32-pin)
DS04–27265–3E
5