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ISL6255EVAL1Z Evaluation Board
Setup Procedure
General Description
The ISL625xEVAL1B EV kit includes all the circuitry needed
to demonstrate the capabilities of the ISL6255 Lithium-Ion
battery-charger with integrated AC adapter current limit. The
user can experiment with an extensive matrix of battery
charge parameters, AC adapter current limit, monitor
functions, and load switching.
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.
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 Plus Anneal Available (RoHS Compliant)
Applications
• Notebook, Desknote and Sub-notebook Computers
• Personal Digital Assistant
Ordering Information
PART
NUMBER
(Notes 1, 2)
PART
MARKING
TEMP
RANGE (°C)
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL6255HRZ ISL 6255HRZ -10 to +100 28 Ld 5x5 QFN L28.5×5
ISL6255HAZ ISL 6255HAZ -10 to +100 28 Ld QSOP M28.15
ISL6255AHRZ ISL6255 AHRZ -10 to +100 28 Ld 5x5 QFN L28.5×5
ISL6255AHAZ ISL6255 AHAZ -10 to +100 28 Ld QSOP M28.15
NOTES:
1. Intersil Pb-free plus anneal 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.
AN1296.0
April 10, 2007
Application Note
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. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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