廬
ISL6294
Data Sheet
October 4, 2005
FN9174.1
High Input Voltage Charger
The ISL6294 is a cost-effective, fully integrated high input
voltage single-cell Li-ion battery charger. The charger uses a
CC/CV charge profile required by Li-ion batteries. The
charger accepts an input voltage up to 28V but is disabled
when the input voltage exceeds the OVP threshold, typically
6.8V, to prevent excessive power dissipation. The 28V rating
eliminates the overvoltage protection circuit required in a low
input voltage charger.
The charge current and the end-of-charge (EOC) current are
programmable with external resistors. When the battery
voltage is lower than typically 2.55V, the charger
preconditions the battery with typically 20% of the
programmed charge current. When the charge current
reduces to the programmable EOC current level during the
CV charge phase, an EOC indication is provided by the CHG
pin, which is an open-drain output. An internal thermal
foldback function protects the charger from any thermal
failure.
Two indication pins (PPR and CHG) allow simple interface to
a microprocessor or LEDs. When no adapter is attached or
when disabled, the charger draws less than 1碌A(chǔ) leakage
current from the battery.
Features
鈥?Complete Charger for Single-Cell Li-ion/Polymer Batteries
鈥?Integrated Pass Element and Current Sensor
鈥?No External Blocking Diode Required
鈥?Low Component Count and Cost
鈥?1% Voltage Accuracy
鈥?Programmable Charge Current
鈥?Programmable End-of-Charge Current
鈥?Charge Current Thermal Foldback for Thermal
Protection
鈥?Trickle Charge for Fully Discharged Batteries
鈥?28V Maximum Voltage for the Power Input
鈥?Power Presence and Charge Indications
鈥?Less Than 1碌A(chǔ) Leakage Current off the Battery When No
Input Power Attached or Charger Disabled
鈥?Ambient Temperature Range: -40擄C to 85擄C
鈥?8 Ld 2x3 DFN Packages
鈥?Pb-Free Plus Anneal Available (RoHS Compliant)
Ordering Information
PART
NUMBER
PART
TEMP.
MARKING RANGE (擄C)
-40 to 85
PACKAGE
PKG.
DWG. #
Applications
鈥?Mobile Phones
鈥?Blue-Tooth Devices
鈥?PDAs
鈥?MP3 Players
鈥?Stand-Alone Chargers
鈥?Other Handheld Devices
ISL6294IRZ-T 94Z
(Note)
8 Ld 2x3 DFN L8.2x3
(Pb-free)
NOTE: 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.
Pinout
ISL6294
(8 LD DFN)
TOP VIEW
VIN
PPR
CHG
EN
1
2
3
4
8
7
6
5
BAT
IREF
IMIN
GND
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
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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.
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