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®
Data Sheet
ISL6252, ISL6252A
August 25, 2010
FN6498.3
Highly Integrated Battery Charger
Controller for Notebook Computers
The ISL6252, ISL6252A is a highly integrated battery charger
controller for Li-ion/Li-ion polymer batteries. High Efficiency is
achieved by a synchronous buck topology. The low side
MOSFET emulates a diode at light loads to improve the light
load efficiency and prevent system bus boosting.
The constant output voltage can be selected for 2, 3 and 4
series Li-ion cells with 0.5% accuracy over-temperature. It can
also be programmed between 4.2V + 5%/cell and
4.2V - 5%/cell to optimize battery capacity. When supplying
the load and battery charger simultaneously, the input current
limit for the AC adapter is programmable to within 3%
accuracy to avoid overloading the AC adapter, and to allow
the system to make efficient use of available adapter power
for charging. It also has a wide range of programmable
charging current. The ISL6252, ISL6252A provides outputs
that are used to monitor the current drawn from the AC
adapter, and monitor for the presence of an AC adapter. The
ISL6252, ISL6252A automatically transitions from regulating
current mode to regulating voltage mode.
Ordering Information
PART
NUMBER
(Notes 1, 2, 3)
PART
MARKING
TEMP
RANGE PACKAGE PKG.
(°C) (Pb-Free) DWG. #
ISL6252HRZ ISL 6252HRZ -10 to +100 28 Ld 5x5 L28.5x5
QFN
ISL6252HAZ ISL 6252HAZ -10 to +100 24 Ld
QSOP
M24.15
ISL6252AHRZ ISL6252 AHRZ -10 to +100 28 Ld 5x5 L28.5x5
QFN
ISL6252AHAZ ISL6252 AHAZ -10 to +100 24 Ld
QSOP
M24.15
NOTES:
1. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ
special Pb-free material sets, molding compounds/die
attach materials, and 100% matte tin plate plus anneal
(e3 termination finish, which is RoHS compliant and
compatible with both SnPb and Pb-free soldering
operations). Intersil Pb-free products are MSL classified
at Pb-free peak reflow temperatures that meet or
exceed the Pb-free requirements of IPC/JEDEC J STD-
020.
3. For Moisture Sensitivity Level (MSL), please see device
information page for ISL6252, ISL6252A. For more
information on MSL please see techbrief TB363.
Features
• ±0.5% Charge Voltage Accuracy (-10°C to +100°C)
• ±3% Accurate Input Current Limit
• ±3% Accurate Battery Charge Current Limit
• ±25% Accurate Battery Trickle Charge Current Limit
• Programmable Charge Current Limit, Adapter Current
Limit and Charge Voltage
• Fixed 300kHz PWM Synchronous Buck Controller with
Diode Emulation at Light Load
• Overvoltage Protection
• Output for Current Drawn from AC Adapter
• AC Adapter Present Indicator
• Fast Input Current Limit Response
• Input Voltage Range 7V to 25V
• Support 2-, 3- and 4-Cells Battery Pack
• Up to 17.64V Battery-Voltage Set Point
• Thermal Shutdown
• Less than 10µA Battery Leakage Current
http://www.DataSheet4U.net/
• Supports Pulse Charging
• Pb-free (RoHS Compliant)
Applications
• Notebook, Desknote and Sub-notebook Computers
• Personal Digital Assistant
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2007, 2008, 2010. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

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ISL6252, ISL6252A
Pinouts
ISL6252, ISL6252A
(28 LD QFN)
TOP VIEW
28 27 26 25 24 23 22
EN 1
21 CSOP
CELLS 2
20 CSIN
ICOMP 3
19 CSIP
VCOMP 4
18 NA
ICM 5
17 NA
VREF 6
16 PHASE
CHLIM 7
15 UGATE
8 9 10 11 12 13 14
ISL6252, ISL6252A
(24 LD QSOP)
TOP VIEW
VDD
ACSET
EN
CELLS
ICOMP
VCOMP
ICM
VREF
CHLIM
ACLIM
VADJ
GND
1
2
3
4
5
6
7
8
9
10
11
12
24 DCIN
23 ACPRN
22 CSON
21 CSOP
20 CSIN
19 CSIP
18 PHASE
17 UGATE
16 BOOT
15 VDDP
14 LGATE
13 PGND
http://www.DataSheet4U.net/
2 FN6498.3
August 25, 2010

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ISL6252, ISL6252A
ICM
ACSET
ACPRN
ACLIM
+
- 1.26V
VREF
152kΩ
152kΩ
ADAPTER
CURRENT
LIMIT SET
-
gm3
+
CSIP CSIN
+-
X19.9
CA1
LDO
REGULATOR
DCIN
VDD
ICOMP
VCOMP
VADJ
CELLS
VREF
MIN
CURRENT
BUFFER
MIN
VOLTAGE
BUFFER
Σ
300kHz
RAMP
-
PWM
+
VREF
514kΩ
514kΩ
gm1
-
2.1V
VOLTAGE
SELECTOR
VDD
REFERENCE
-0.25
288kΩ
32kΩ
gm2
-
16kΩ
48kΩ
http://www.DataSheet4U.net/
CA2
X19.9
-+
GND
FB CSON CSOP CHLIM
FIGURE 1. FUNCTIONAL BLOCK DIAGRAM
BOOT
UGATE
PHASE
VDDP
LGATE
PGND
1.065V
-
+
EN
3 FN6498.3
August 25, 2010

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ISL6252, ISL6252A
AC ADAPTER
R8
130k
1%
R9
10.2k
1%
D3
C8
0.1µF
DCDICNIN
ACASCESTET
D4
CSIP
TO HOST
CONTROLLER
C7
1µF
3.3V
R5
100k
C6 6.8nF
R10
4.7Ω
C9
1µF
IISSLL66225522
ISIISS6LL2665225522A
VDVDPDP
CCSSIINN
VDVDD
BBOOOOTT
ACAPCRPNRN UUGGAATTEE
ICICOOMMPP PPHHAASSEE
R21 2.2Ω
C2
0.1µF
R2
20mΩ
R22 22Ω
VDDP C1:10 µF
D2
C4
0.1µF
Q1
SYSTEM LOAD
R6 C5 10nF
4.7k FLOATING
4.2V/CELL
VCVOCMOMP P
VAVDAJDJ
LLGGAATTEE
PPGGNNDD
Q2
D1
OPTIONAL
L
4.7µH
R11 22Ω
CHARGE
ENABLE
EENN
CCSSOOPP
C3
0.047µF
R1
20mΩ
ACALCILMIM
VREF
R12 2.6A CHARGE LIMIT
20k 1% 253mA TRICKLE CHARGE
R13
1.87k
TRICKLE 1%
CHARGE
R11
130k
1%
Q6
VRVREFEF
CHCHLILMIM
CCSSOONN
CELLS
VDD
4 CELLS
R12 22Ω
C10
22µF
ICM
R7: 100Ω
GND
http://www.DataSheet4U.net/
C11
3300pF
D5 R23
1N914 10k
BAT+
BATTERY
PACK
BAT-
VDD
FIGURE 2. ISL6252, ISL6252A TYPICAL APPLICATION CIRCUIT WITH FIXED CHARGING PARAMETERS
4 FN6498.3
August 25, 2010

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ISL6252, ISL6252A
ADAPTER
R8
130k
1%
R9
10.2k
1%
D3
C8
0.1µF
DDCCININ
AACCSSEETT
D4
CCSSIPIP
VCC
DIGITAL
INPUT
C7
1µF
R16
100k
C9
1µF
R5
100k
R10
4.7Ω
ISLIS6L2IS652L562252 CCSSININ
ISL6252A
ISISLL6252
VVDDDDPP
VVDDDD
BBOOOOTT
UGUAGTAETE
AACCPPRRNN
PHPAHSAESE
LGLGATAETE
D/A OUTPUT
OUTPUT
A/D INPUT
HOST
AVDD/VREF
SCL
SDL
A/D INPUT
GND
CCHHLLIMIM
R7: 100Ω
C11
3300pF
5.15A INPUT
CURRENT LIMIT
R11, R12
R13: 10k
C6
6.8nF
EENN
ICICMM
AACCLLIMIM
VVRREEFF
ICICOOMMPP
R6
4.7k
VVCCOOMMPP
C5
10nF
PGPGNDND
CCSOSOPP
CSCOSONN
CCEELLSLS
VAVADDJJ
http://www.DataSheet4U.net/
GGNNDD
R21 2.2Ω
C2
0.1µF
R2
20mΩ
R22 22Ω
SYSTEM LOAD
VDDP
D2
C4
0.1µF
C1:10µF
Q1
Q2
D1
OPTIONAL
L
4.7µH
R11 22Ω
C3
0.047µF
GND R12 22Ω
3-CELLS
FLOATING
4.2V/CELL
R1
20mΩ
C10
22µF
VDD
R23
10k
D5
1N914
CSON
BAT+
BATTERY
PACK
SCL
SDL
TEMP
BAT-
FIGURE 3. ISL6252, ISL6252A TYPICAL APPLICATION CIRCUIT WITH µP CONTROL
5 FN6498.3
August 25, 2010