廬
ISL6297
Datasheet
September 27, 2005
FN9215.0
Li-ion/Li Polymer Battery Charger
The ISL6297 is a Dual-Mode Lithium Ion battery charger
optimized for cellular phone travel charger applications. It
uses Intersil鈥檚
patent-pending
dual-mode charge
technology to minimize the heat normally generated in a
linear charger. By minimizing the heat generation, the
ISL6297 can be placed inside the connector of the travel
charger to completely remove the influence of the adapter
cable on the charging performance.
The ISL6297 is an enhancement of the original ISL6292B.
New features include improved accuracy, pre-charge circuit
verification, and enhanced LED indicator function.
Working with a current-limited AC/DC converter, the dual-
mode charger charges a Li-ion battery with the same current
profile as a traditional linear charger. The constant charge
current is determined by the current limit of the AC/DC
converter. The constant output voltage is fixed at 4.2V. When
the battery voltage is below 2.8V, the charger preconditions
the battery with a low trickle-charge current. The charge
status is indicated by a bi-color LED. A safety timer prevents
charging a dead battery for an excessively long period.
The ISL6297 also features THERMAGUARD鈩? a thermal
foldback function that automatically reduces the charge
current when the internal die temperature exceeds a 100擄C
limit to prevent further temperature rise. This function
removes the concern of thermal failure in the targeted
space-limited applications. An ambient temperature
monitoring circuit allows users to set two separate
temperature limit levels, for charge and non-charge
conditions. The thermally-enhanced QFN package further
improves the thermal performance of the ISL6297 in space-
limited applications.
Features
鈥?Complete Charger for Single-Cell Li-ion Batteries
鈥?Integrated Pass Element and Current Sensor
鈥?No External Blocking Diode Required
鈥?Very Low Thermal Dual-Mode Operation
鈥?0.7% Voltage Accuracy with Remote Sense
鈥?Pre-charge circuit verification with LED status indication
鈥?Drives a bi-color LED
鈥?Programmable Safety Timer
鈥?Programmable Current Limit up to 1.5A
鈥?Programmable End-of-Charge Current
鈥?THERMAGUARD鈩?Charge Current Thermal Foldback
鈥?NTC Thermistor Interface for Battery Temperature Monitor
鈥?Two-Level Ambient Temperature Setting
鈥?Guaranteed to Operate at 2.65V After Start-Up
鈥?Ambient Temperature Range: -20擄C to 70擄C
鈥?Thermally-Enhanced QFN Packages
鈥?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
鈥?Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
PDAs, Cell Phones and Smart Phones
Portable Instruments, MP3 Players
Medical Handhelds
Self-Charging Battery Packs
Stand-Alone Chargers
Pinout
ISL6297
16 LD QFN
TOP VIEW
BAT
BAT
VIN
VIN
Ordering Information
PART
NUMBER
12 VSEN
11 TEMP
10 IMIN
9
IREF
16
VIN
GRN
RED
TIME
1
2
3
4
5
GND
15
14
13
PART
TEMP.
MARKING RANGE (擄C)
ISL6297CR
6297CRZ
-20 to 70
-20 to 70
PACKAGE
PKG.
DWG. #
ISL6297CR
ISL6297CR-T
ISL6297CRZ
(See Note)
16 Ld 4x4 QFN L16.4x4
16 Ld 4x4 QFN L16.4x4
(Pb-free)
ISL6297CR 16 Ld 4x4 QFN Tape and Reel
6
DT
7
EN
8
V2P9
ISL6297CRZ-T 6297CRZ
(See Note)
16 Ld 4x4 QFN Tape and Reel
(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.
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.
Thermaguard is a trademark of Intersi Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
ISL6297 PDF文件相關(guān)型號(hào)
ISL6297CR,ISL6298,ISL6308
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