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PDF MB39A132 Data sheet ( Hoja de datos )
| Número de pieza | MB39A132 | |
| Descripción | Synchronous Rectification DC/DC Converter IC | |
| Fabricantes | Fujitsu | |
| Logotipo |  |
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FUJITSU SEMICONDUCTOR
DATA SHEET
DS04–27265–5E
ASSP For Power Management Applications
(Rechargeable Battery)
Synchronous Rectification DC/DC
Converter IC for Charging Li-ion Battery
MB39A132
■ DESCRIPTION
MB39A132, which is used f or charging Li-ion batter y, is a synchronous rectification DC/DC con verter IC
adopting pulse width modification (PWM). It can control charge voltage and charge current separately and
supports the N-ch MOS driver. In addition, MB39A132 is suitable for down-conversion.
MB39A132 has an AC adapter detection comparator, which is independent of the DC/DC converter control
block, and can control the source supplying voltage to the system.
MB39A132 suppor ts a wide input v oltage range, enables low current consumption in standb y mode, and
can control the charge voltage and charge current with high precision, which is perfect for the built-in Li-ion
battery charger used in devices such as notebook PC.
■ FEATURES
• Supports 2/3/4-Cell battery pack
• Two built-in constant current control loops
• Built-in AC adapter detection function (ACOK pin)
• Charge voltage setting accuracy: 0.5 (Ta 25 C to 85 C)
• Charge voltage control setting can be selected without using an y external resistor. (4.00 V/Cell, 4.20 V/
Cell, 4.35 V/Cell)
Output voltage can also be freely set by using the external resistor.
• Two built-in high-precision current detection amplifiers
:Input offset voltage:+3 mV
:Detection accuracy: 1 mV (+INC1, +INC2 3 V to VCC)
• Charge current control setting can be selected without using any external resistor. (RS 20 m: 2.85 A)
Charge current can also be freely set by using the external resistor.
• Switching frequency can be set by using the external resistor
(MB39A132 has a built-in frequency setting capacitor.):100 kHz to 2 MHz
• Built-in off time control function
• In standby mode (Icc 6 A Typ), only the AC adapter detection function is in operation.
• Built-in output stage for N-ch MOS FET synchronous rectification
• Built-in charge stop function at low VCC pin voltage
• Built-in soft-start function whose setting time can be adjusted
• Equipped with the function enabling the independent operation of the AC adapter current detection amplifier
• Package: QFN-32
■ APPLICATIONS
• Internal charger used in notebook PC
• Handy terminal device
etc.
Copyright©2008-2011 FUJITSU SEMICONDUCTOR LIMITED All rights reserved
2011.8
http://www.Datasheet4U.com
1 page  
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
45
<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
A BC
2.85 A
Io
RS
20 mΩ
VO
Battery
8 15 16 20
COMP1 COMP2 COMP3 RT
21 22
VREF GND
(32-pin)
DS04–27265–5E
5
5 Page 
MB39A132
(Ta 25 C, VCC pin = 19 V, VB pin 0 mA, VREF pin 0 mA)
Parameter
Sym- Pin
bol No.
Condition
Value
Unit
Min Typ Max
I+INCH1
3
+INC1 pin 3 V to VCC pin,
Vin 100 mV
20
30 A
I+INCH2
12
+INC2 pin 3 V to VCC pin,
Vin 100 mV
30
45 A
Input current
I-INCH
INC1 pin INC2 pin
2,13 3 V to VCC
pin, Vin 100 mV
0.1 0.2 A
I+INCL
+INC1 pin +INC2 pin
3,12 0.1 V,
Vin 100 mV
240 160 A
I-INCL
INC1 pin INC2 pin
2,13 0.1 V,
Vin 100 mV
270 180
A
Current
Detection
Amplifier Block
[Current Amp1,
Current Amp2]
Input offset
voltage
Common
mode input
voltage range
VOFF1
VOFF2
VCM
10,11
+INC1 pin +INC2 pin 3 V
to VCC pin
10,11
+INC1 pin +INC2 pin 0 V
to 3 V
10,11
234
135
0
mV
mV
VVCC
V
Voltage gain
Av
10,11
+INC1 pin +INC2 pin 3 V
to VCC pin, Vin 100 mV
24.5
25.0
25.5
V/V
Frequency
bandwidth
BW 10,11 AV 0 dB
2* MHz
Output
voltage
VOUTCH 10,11
4.7 4.9 V
VOUTCL
10,11
+INC1 pin +INC2 pin 3 V
to VCC pin
50
75 100 mV
Output source
current
ISOURCE
10,11
OUTC1 pin
OUTC2 pin 2 V
2 1m A
Output sink
current
ISINK
10,11
OUTC1 pin
OUTC2 pin 2 V
25 50 A
OUTC1 pin
Output
voltage
VOUTC1 10 VIN pin 0 V
0 V
PWM
Comparator
Block
[PWM Comp.]
Threshold
voltage
VTL 30 Duty cycle 0 %
VTH 30 Duty cycle 100 %
1.4 1.5
2.5 2.6
V
V
Output Block Output
ROH 27,30 OUT1,OUT2 pin 45 mA
47
[OUT]
ON resistance ROL 27,30 OUT1,OUT2 pin 45 mA 13 .5
(Continued)
DS04–27265–5E
11
11 Page | ||
| Páginas | Total 56 Páginas | |
| PDF Descargar | [ Datasheet MB39A132.PDF ] | |
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