FUJITSU MICROELECTRONICS
DATA SHEET
DS04-27264-2E
ASSP for Power Management Applications
(Rechargeable Battery)
DC/DC converter IC
for Charging Li-ion battery
MB39A134
■
DESCRIPTION
The MB39A134 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 charge voltage and current independently.
MB39A134 has a AC adapter detection comparator independent of the DC/DC converter controller, and can
control the source of power supply to a system. It supports a wide input voltage range, enables low current
consumption in standby 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
•
•
•
•
•
•
Support 2, 3 and 4 Cell Battery Pack
Built-in two constant current control loops
Built-in AC adapter detection function (ACOK pin)
Charge voltage accuracy :
±0.7%
(Ta
= −10 °C
to
+85 °C)
Built-in charging voltage control without external setting resistor (4.20 V/Cell or 4.10 V/Cell)
Adjustable to charge voltage with external resistor
Built-in two high accurate current detection amplifiers (±1%) (At input voltage difference 100 mV)
(±5%) (At input voltage difference 20 mV)
Input offset voltage : 0 mV (Current Amp1)
: +3 mV (Current Amp2)
Built-in Charging Current Control without external resistor (R
S
=
20 mΩ : 2.85 A)
Adjustable charging current with external resistor
Setting of switching frequency using an external resistor
(Frequency setting capacitor integrated) : 100 kHz to 2 MHz
Built-in under voltage lockout protection
In standby mode (Icc
=
6
µA
Typ) , only AC adapter detection function is operated
Built-in VH regulator for reducing Qg loss of P-ch MOS FET
Package : TSSOP-24
•
•
•
•
•
•
■
APPLICATIONS
• Built-in charger for Notebook PC
• Handy terminal device
etc.
Copyright©2008 FUJITSU MICROELECTRONICS LIMITED All rights reserved
2008.9
MB39A134
■
PIN ASSIGNMENT
(TOP VIEW)
−INC1
OUTC1
ADJ1
COMP1
ACOK
VREF
ACIN
COMP2
ADJ2
OUTC2
CELLS
BATT
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
+INC1
GND
CVM
VCC
OUT
VH
VIN
RT
ADJ3
COMP3
CTL
+INC2
(FPT−24P−M08)
2
DS04-27264-2E
MB39A134
■
PIN DESCRIPTIONS
Pin No.
1
2
3
4
5
6
7
8
Pin Name
-INC1
OUTC1
ADJ1
COMP1
ACOK
VREF
ACIN
COMP2
I/O
I
O
I
O
O
O
I
O
Description
Current detection amplifier (Current Amp1) inverted input pin.
Current detection amplifier (Current Amp1) output pin.
Error amplifier (Error Amp1) non-inverted input pin.
Error amplifier (Error Amp1) output pin.
AC adapter voltage detection block (AC Comp.) output pin.
ACIN
=
H : ACOK
=
Lo-Z, ACIN
=
L : ACOK
=
Hi-Z
Reference voltage output pin.
AC adapter voltage detection block (AC Comp.) input pin.
Error amplifier (Error Amp2) output pin.
Charge current control block setting input pin.
ADJ2 pin “GND to 4.4 V” : Charge current control block output
=
ADJ2 pin
voltage
ADJ2 pin “4.6 V to VREF” : Charge current control block output
=
1.5 V
Current detection amplifier (Current Amp2) output pin.
Charge voltage setting switch pin (2 or 3 or 4 Cells).
CELLS = VREF: 4 Cells, CELLS = GND: 3 Cells, CELLS = OPEN: 2 Cells
Current detection amplifier (Current Amp2) inverted input pin.
Battery voltage input pin.
Current detection amplifier (Current Amp2) non-inverted input pin.
Power supply control pin.
Setting the CTL pin at “H” level places the DC/DC converter IC in the operating
mode.
Setting the CTL pin at “L” level places the DC/DC converter IC in the standby
mode.
Error amplifier (Error Amp3) output pin.
Charge voltage control block setting input pin.
ADJ3 pin “GND to 0.2 V” : Charge voltage setting 4.10 V/Cell
ADJ3 pin “0.4 V to 4.4 V” : Charge voltage setting 2
×
V
ADJ3
pin voltage/Cell
ADJ3 pin “4.6 V to VREF” : Charge voltage setting 4.20 V/Cell
Triangular wAVe oscillation frequency setting resistor connection pin.
Power supply pin for ACOK function block.
Power supply pin for FET drive circuit (VH
=
VCC
−
6 V)
External FET gate drive pin.
Power supply pin for reference voltage , control circuit, and output circuit.
Constant voltage control state detection block (CV Comp.) output pin.
Ground pin.
Current detection amplifier (Current Amp1) non-inverted input pin.
9
ADJ2
I
10
11
12
13
OUTC2
CELLS
BATT
+INC2
O
I
I
I
14
CTL
I
15
COMP3
O
16
ADJ3
I
⎯
⎯
O
O
⎯
O
⎯
I
17
18
19
20
21
22
23
24
RT
VIN
VH
OUT
VCC
CVM
GND
+INC1
DS04-27264-2E
3
MB39A134
■
BLOCK DIAGRAM
TO SYSTEM
LOAD
CVM
ACIN
ACOK
22 7
VIN
5
<AC
−
Comp.>
+
18
<CV Comp.>
−
+
<Current Amp1>
+
✕
25
OUTC1
2
+INC1
21
VCC
24
1
-INC1
V
IN
<Error Amp1>
−
+
3
ADJ1
OUTC2
<PWM Comp.>
+
+
+
−
−2.5
V
−1.5
V
Bias
Voltage
<VH>
<OSC>
C
T
Drive
20
OUT
A
Io
B
2.85 A
V
O
10
+INC2
<Current Amp2>
VCC-6 V
19
VH
R
S
20 mΩ
Battery
A
B
BATT
ADJ2
13
12
9
✕
25
+
<Error Amp2>
−
+
3 mV
Charge Current
Control
VCC
UVLO
VREF
UVLO
16
ADJ3
VREF
:
4.20 V/Cell
GND
:
4.10 V/Cell
VO
REFIN
Control
<Error Amp3>
−
+
VCC
<VR1>
1.26 V
VR1
VCC
<REF>
<CTL>
14
CTL
5.0 V ON/OFF
VREF
11
OPEN
:
2Cells
GND
:
3Cells
VREF
:
4Cells
CELLS
4
COMP1
8
15
COMP2
17
RT
6
VREF
23
GND
(
24-pin
)
COMP3
4
DS04-27264-2E
MB39A134
■
ABSOLUTE MAXIMUM RATINGS
Parameter
Power supply voltage
Symbol
Vv
CC
VCC, VIN pin
VCC, VIN pin, t
≤
10
µs
OUT pin
Output current
CLT pin input voltage
Input voltage
I
OUT
V
CTL
V
INE
V
INC
Power dissipation
Storage temperature
P
D
T
STG
OUT pin
Duty
≤
5% (t
=
1/fosc
×
Duty)
CTL pin
ADJ1, ADJ2, ADJ3, CELLS, ACIN
pin
-INC1,
+INC1,
BATT,
+INC2
pin
Ta
≤ +
25
°C
Ta
= +
85
°C
⎯
Condition
Rating
Min
−
0.3
−
0.3
−
60
−
700
−
0.3
−
0.3
−
0.3
⎯
⎯
−
55
Max
+
28
+
32
+
60
+
700
+
28
V
VREF
+
0.3
+
28
1282*
1,
*
2
512*
1,
*
2
+
125
Unit
V
V
mA
mA
V
V
V
mW
mW
°C
*1 : See the diagram of “■ TYPICAL CHARACTERISTICS . Maximum Power Dissipation vs. Operating Ambient
Temperature”, for the package power dissipation of Ta from + 25
°C
to + 85
°C.
*2 : When IC is mounted on a 10x10 cm two-layer square epoxy board.
WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current,
temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings.
DS04-27264-2E
5
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