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39A126 Schematic ( PDF Datasheet ) - Fujitsu Component Limited

Teilenummer 39A126
Beschreibung MB39A126
Hersteller Fujitsu Component Limited
Logo Fujitsu Component Limited Logo 




Gesamt 30 Seiten
39A126 Datasheet, Funktion
www.DataSheet.co.kr
FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27248-1E
ASSP for Power Supply Applications (Secondary battery)
DC/DC Converter IC for Charging
Li-ion Battery
MB39A125/126
DESCRIPTION
MB39A125/126 is a DC/DC converter IC for charging Li-ion battery, which is suitable for down-conversion, and
uses pulse width modulation (PWM) for controlling the output voltage and current independently. This IC integrates
the build-in comparator for the voltage detection of the AC adapter, and selects the AC adapter or battery auto-
matically for power supply to the system.
Provides a wide range of power supply voltage, low standby current, and high efficiency, which makes them ideal
as a built-in charging device in products such as notebook PC.
FEATURES
• High efficiency : 97% (MAX)
• Built-in two constant current control circuits
• Analog control of the charging current value (+INE1, +INE2 terminal)
• Built-in AC adapter voltage detection function (ACOK, XACOK terminal)
PACKAGES
(Continued)
24-pin plastic SSOP
28-pin plastic QFN
(FPT-24P-M03)
(LCC-28P-M11)
Datasheet pdf - http://www.DataSheet4U.net/






39A126 Datasheet, Funktion
www.DataSheet.co.kr
MB39A125/126
(Continued)
(TOP VIEW)
28 27 26 25 24 23 22
N.C.
GND
+INC2
N.C.
INC2
OUTC2
+INE2
1
2
3
4
5
6
7
21 FB123
20 CTL
19 +INC1
18 N.C.
17 INC1
16 SEL
15 N.C.
8 9 10 11 12 13 14
(LCC-28P-M11)
Note : Connect IC’s radiation board at bottom side to potential of GND.
6
Datasheet pdf - http://www.DataSheet4U.net/

6 Page









39A126 pdf, datenblatt
www.DataSheet.co.kr
MB39A125/126
MB39A126
INE1 8
OUTC1 10
13
+INC1
INC1 12
<Current Amp1>
+
×20
+INE1 9
INE2 4
OUTC2 2
+INC2 24
INC2 1
<Current Amp2>
+
×20
+INE2 3
FB123 15
INE3 16
R1
R2
ACIN
7
<AC Comp.>
+
VREF
1.4 V
ACOK
5
XACOK
18
<Error Amp1>
+
<Error Amp2>
+
<Error Amp3>
+
4.2 V/3.15 V
0.2 V <UV Comp.>
+
INC1
(Vo)
<PWM Comp.>
+
<OUT>
Drive
21 VCC
20 OUT
2.5 V
1.5 V
(VCC 6 V) 19 VH
VH
Bias
Voltage
<UVLO>
VREF
UVLO
SEL 11
Hi : 4 Cells
Lo : 3 Cells
VREF
< SOFT>
10 µA
CS 22
Slope
Control
<OSC>
500 kHz Max
4.2 V
Bias
<REF>
CT
(45 pF)
VREF
5.0 V
17 6
RT VREF
VCC
<CTL>
23
GND
14 CTL
12
Datasheet pdf - http://www.DataSheet4U.net/

12 Page





SeitenGesamt 30 Seiten
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