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PDF ISL6253 Data sheet ( Hoja de datos )
| Número de pieza | ISL6253 | |
| Descripción | Highly Integrated Battery Charger | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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®
Data Sheet
August 2004
ISL6253
FN9117.2
Highly Integrated Battery Charger for
Notebook Computers
The ISL6253 is a highly integrated battery charger controller
for Li-Ion/Li-Polymer batteries. High Efficiency is achieved by
a synchronous buck topology and the use of a MOSFET,
instead of a diode, for selecting power from the adapter or
battery. 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 or 4
series Li-Ion cells with 0.5% accuracy over temperature. It
can also be programmed between 4.2V +5% per cell and
4.2V -5% per 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 programmable
charging current with 4% accuracy. The ISL6253 provides
outputs that are used to monitor the current drawn from the
AC adapter, and to monitor for the presence of an AC
adapter. The ISL6253 automatically transitions from
regulating current to regulating voltage. A conditioning
charge feature provides approximately 10% of full scale
charge current to safely charge deeply discharged lithium-
ion (LI+) battery packs when the battery voltage is below
3.0V/cell.
ISL6253 has a feature of automatic power source selection
by switching to the battery when the AC adapter is removed
or switching to the AC adapter when the AC adapter is
available. It also supports aircraft power applications while
powering the system and not charging the battery.
Ordering Information
PART #
TEMP.
RANGE (°C)
PACKAGE
PKG.
DWG. #
ISL6253HRZ
(Note 1)
-10 to 100 28 Ld 5x5 QFN
(Pb-free)
L28.5x5
ISL6253HAZ
(Note 1)
-10 to 100 28 Ld QSOP
(Pb-free)
M28.15
NOTES:
1. Intersil Pb-free products employ special Pb-free material sets;
molding compounds/die attach materials and 100% matte tin
plate termination finish, which is 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-020B.
2. Add “-T” for Tape and Reel.
Features
• ±0.5% Voltage Accuracy
• ±3% Input Current Limit Accuracy
• ±4% Accurate Battery Charge Current Limit
• Programmable Charge Limit Current, Adaptor Current
Limit and Charge Voltage
• Fixed 300kHz PWM Synchronous Buck Controller with
Diode Emulation at Light Load
• Output for Current Drawn from the AC Adapter
• AC Adapter Present Indicator
• Fast Input Current Limit Response
• Input Voltage Range 7V to 25V
• Up to 17.6V Battery-Voltage Set Point
• Trickle Charge Mode When Battery Voltage is below
3.0V/Cell
• Supports 2, 3 and 4 Cell Battery Packs
• Control Adapter Power Source Select MOSFET
• Thermal Shutdown
• Aircraft Power Capable
• DC Adapter Present Indicator
• Battery Discharge MOSFET Control
• Less than 10µA Battery Leakage Current
• QFN Package
- Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat
No Leads - Package Outline
- Near Chip Scale Package footprint, which improves
PCB efficiency and has a thinner profile
• Pb-free Available
Applications
• Notebook, Desknote and Sub-notebook Computers
• Personal Digital Assistants
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2004. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL6253
Electrical Specifications
DCIN = CSIP = CSIN = 18V, CSOP = CSON = 12V, ACSET = DCSET = 1.5V, VREF = ACLIM = CHLIM,
VADJ = Floating, EN = VDD = 5V, BOOT-PHASE = 5.0V, GND = PGND = 0V, CVDD = 1µF IVDD = 0mA,
TA = -10°C to +100°C, TJ ≤ 125°C, unless otherwise noted. (Continued)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNITS
ACLIM Input Bias Current
ACLIM = GND, or VREF
-25 25 µA
VOLTAGE REGULATION ERROR AMPLIFIER
Error Amplifier Trans-conductance from CSON to
VCOMP
CELLS = VDD
20 30 40 µA/V
VCOMP Voltage Range
0.3 4 V
CURRENT REGULATION ERROR AMPLIFIER
Charging Current Error Amplifier Trans conductance
50 µA/V
Adapter Current Error Amplifier Trans conductance
50 µA/V
ICOMP Voltage Range
0.3 4 V
BATTERY CELL SELECTOR
CELLS Input Low Voltage
0.5 V
CELLS Input Float Voltage
CELLS = Float
VREF VREF VREF
-0.3 + 0.3
V
CELLS Input High Current
VDD-
0.5
V
MOSFET DRIVER
BGATE Pull-up Current
CSIP-BGATE = 3V
1 1.4 2
mA
BGATE Pull-down Current
CSIP-BGATE = 5V
3.25 5.0
7
mA
CSIP-BGATE Voltage High
8.0 10 12
V
CSIP-BGATE Voltage Low
0 0.1
V
DCIN-CSON Threshold for CSIP-BGATE Going High DCIN = 12V, CSON Rising
-200 0 200 mV
DCIN-CSON Threshold for CSIP-BGATE Going Low DCIN = 12V, CSON Falling
0 300 500 mV
DCIN-CSON Threshold Hysteresis
250 300 400
mV
SGATE Pull-up Current
CSIP-SGATE = 3V
1.0 1.4 2.0
mA
SGATE Pull-down Current
CSIP-SGATE = 2.5V
40 150 350
µA
CSIP-SGATE Voltage High
5 8.5 15
V
CSIP-SGATE Voltage Low
0 0.1
V
CSIP-CSIN Threshold for CSIP-SGATE Going High
3 8.5 15 mV
CSIP-CSIN Threshold Hysteresis
1 2 6 mV
LOGIC INTERFACE
EN Low Level Input Voltage
0.8 V
EN High Level Input Voltage
2.0 V
ACPRN Sink Current
ACPRN = 0.4V
3 8 13 mA
ACPRN Leakage Current
ACPRN = 20V
-1 1 µA
DCPRN Sink Current
DCPRN = 0.4V
3 8 13 mA
DCPRN Leakage Current
DCPRN = 20V
-1 1 µA
ICM Output Voltage
Iload = 0 to 100µA, CSIP-CSIN = 103mV
1.885 1.980 2.085
V
Thermal Shutdown Temperature
Rising
150 °C
Thermal Shutdown Temperature Hysteresis
20 °C
NOTE:
7. This is sum of currents in these pins (CSIP, CSIN, BOOT, UGATE, PHASE, CSOP and CSON) tied together to 18V. EN, ACSET, DCSET, VADJ,
CELLS, ACLIM, CHLIM, VDD, DCIN = 0.
5
5 Page 
ISL6253
VCC
DIGITAL
INPUT
D/A OUTPUT
OUTPUT
A/D INPUT
HOST
AVDD/VREF
SCL
SDL
A/D INPUT
GND
INPUT: 7V TO 25V
Q3
R8
130K
1%
D3
R9
10.2K
1%
C12
1µF
R5
100K
C10
1µF
C9
0.1µF
CSON
R7
4.7Ω
DCIN
SGATE
ACSET
CCSSIPIP
ISLIS6L2652353
VDDP
CCSSININ
VDD
BBOOOOTT
ACPRN
UGUAGTAETE
CHLIM
PHPAHSAESE
R13: 100Ω
C13
0.1µF
5A INPUT
CURRENT LIMIT
EN
ICM
ACLIM
C7
6.8nF
VREF
ICOMP
R6 C6
10K 10nF
R10, R11, R12
10K FLOATING
4.2V/CELL
VCOMP
VADJ
LGLAGTAETE
PGPGNNDD
CCSOSOPP
CCSOSONN
CCELELLSLS
GGNNDD
DCDSCESTET
C3
0.1µF
R3: 18Ω
VDDP
D2
C5
0.1µF
R2
20mΩ
SYSTEM
LOAD
C1:10µF
C2
10µF
Q1
D1
Q2 OPTIONAL L
15µH
C4
1µF
R4
2.2Ω
4 CELLS
VDD
C11
22µF
R1
25mΩ
BAT+
BATTERY
PACK
SCL
SDL
TEMP
BAT-
FIGURE 17. TYPICAL APPLICATION CIRCUIT 1
11
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet ISL6253.PDF ] | |
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