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PDF ISL6255A Data sheet ( Hoja de datos )
| Número de pieza | ISL6255A | |
| Descripción | Highly Integrated Battery Charger | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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Data Sheet
ISL6255, ISL6255A
April 19, 2005
FN9203.0
Highly Integrated Battery Charger with
Automatic Power Source Selector for
Notebook Computers
The ISL6255, ISL6255A is a highly integrated battery
charger controller for Li-Ion/Li-Ion 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 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 ISL6255, ISL6255A
provides outputs that are used to monitor the current drawn
from the AC adapter, and monitor for the presence of an AC
adapter. The ISL6255, ISL6255A automatically transitions
from regulating current mode to regulating voltage mode.
ISL6255, ISL6255A has a feature for 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 provides a DC adapter
monitor to support aircraft power applications with the option
of no battery charging.
Ordering Information
PART
NUMBER
TEMP
RANGE (°C)
PACKAGE
PKG.
DWG. #
ISL6255HRZ
(Notes 1, 2)
-10 to 100 28 Ld 5x5 QFN L28.5×5
(Pb-free)
ISL6255HAZ
(Notes 1, 2)
-10 to 100 28 Ld QSOP
(Pb-free)
M28.15
ISL6255AHRZ -10 to 100 28 Ld 5x5 QFN L28.5×5
(Notes 1, 2)
(Pb-free)
ISL6255AHAZ
(Notes 1, 2)
-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 are 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.
2. Add “-T” for Tape and Reel.
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
(ISL6255A)
• Programmable Charge Current Limit, Adapter Current
Limit and Charge Voltage
• Fixed 300kHz PWM Synchronous Buck Controller with
Diode Emulation at Light Load
• 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
• 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
• Support Pulse Charging
• Charge Any Battery Chemistry: Li-Ion, NiCd, NiMH, etc
• Pb-Free Available (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 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
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ISL6255, ISL6255A
Electrical Specifications
PARAMETER
DCIN=CSIP=CSIN=18V, CSOP=CSON=12V, ACSET=DCSET=1.5V, ACLIM=VREF, 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)
TEST CONDITIONS
MIN
TYP
MAX
UNITS
ADAPTER CURRENT LIMIT THRESHOLD
CSIP to CSIN Full-Scale Current Sense
Voltage
ACLIM=VREF
ACLIM=Float
97 100 103 mV
72 75 78 mV
ACLIM=GND
47 50 53 mV
ACLIM Input Bias Current
ACLIM= VREF
10 16 20 µA
ACLIM=GND
-20 -16 -10 µA
VOLTAGE REGULATION ERROR AMPLIFIER
Error Amplifier Transconductance from
CSON to VCOMP
CELLS=VDD
30 µA/V
CURRENT REGULATION ERROR AMPLIFIER
Charging Current Error Amplifier Trans-
conductance
50 µA/V
Adapter Current Error Amplifier Trans-
conductance
50 µA/V
BATTERY CELL SELECTOR
CELLS Input Voltage for 4 Cell Select
4.3 V
CELLS Input Voltage for 3 Cell Select
2V
CELLS Input Voltage for 2 Cell Select
2.1 4.2 V
MOSFET DRIVER
BGATE Pull-up Current
CSIP-BGATE=3V
10 30 45 mA
BGATE Pull-down Current
CSIP-BGATE=5V
2.7 4.0 5.0 mA
CSIP-BGATE Voltage High
8 9.6 11 V
CSIP-BGATE Voltage Low
50 0 50 mV
DCIN-CSON Threshold for CSIP-BGATE
Going High
DCIN=12V, CSON Rising
-100
0 100 mV
DCIN-CSON Threshold Hysteresis
250 300 400 mV
SGATE Pull-up Current
CSIP-SGATE=3V
7 12 15 mA
SGATE Pull-down Current
CSIP-SGATE=5V
50 160 370 µA
CSIP-SGATE Voltage High
8 9 11 V
CSIP-SGATE Voltage Low
-50 0 50 mV
CSIP-CSIN Threshold for CSIP-SGATE
Going High
2.5 5.5 10 mV
CSIP-CSIN Threshold Hysteresis
1 2 5 mV
LOGIC INTERFACE
EN Input Voltage Range
0
VDD
V
EN Threshold Voltage
Rising
1.030
1.06 1.100
V
Falling
0.985
1.000
1.025
V
Hysteresis
30 60 90 mV
EN Input Bias Current
EN=2.5V
1.8 2.0 2.2 µA
ACPRN Sink Current
ACPRN=0.4V
3 8 11 mA
5 FN9203.0
April 19, 2005
5 Page 
www.DataSheet4U.com
ISL6255, ISL6255A
ADAPTER
Q3
R8
130k
1%
VDD
Q5
C8
0.1µFCSON
R9
10.2k
1%
C7
1µF
To Host
Controller
3.3V
R5
100k
C6:6.8nF
R10
4.7Ω
C9
1µF
R6: 10k C5:10nF
DCIN
SGATE
ACSET
CSIP
ISL6255
ISISLL66225555AA
VDDP
CSIN
BGATE
VDD
BOOT
ACPRN UGATE
ICOMP PHASE
VCOMP LGATE
FLOATING
4.2V/CELL
VADJ
PGND
C2
0.1µF
R2
20mΩ
R3
18Ω
VDDP C1:10µF
D2
C4
0.1µF
Q1
Q4
D1 L
Q2 Optional 10 µH
CHARGE
ENABLE
EN
ACLIM
VREF
R12 2.6A CHARGE LIMIT
20k 1% 253mA Trickle Charge
R13
1.87k
TRICKLE 1%
CHARGE
R11
130k
1%
Q6
VREF
CHLIM
CSOP
CSON
C3 R4
1µF 2.2Ω
CELLS
VDD
4 CELLS
ICM
R7: 100Ω
GND
C11
3300pF
R1
40mΩ
C10
10µF
SYSTEM LOAD
BAT+
Battery
Pack
BAT-
FIGURE 15. ISL6255, ISL6255A TYPICAL APPLICATION CIRCUIT WITH FIXED CHARGING PARAMETERS
11 FN9203.0
April 19, 2005
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet ISL6255A.PDF ] | |
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