Battery Charger. ISL6297 Datasheet

ISL6297 Datasheet PDF


Part Number

ISL6297

Description

Li-ion/Li Polymer Battery Charger

Manufacture

Intersil Corporation

Total Page 16 Pages
Datasheet
Download ISL6297 Datasheet



ISL6297
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ISL6297
FN9215.2
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’s 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™, a thermal
foldback function that automatically reduces the charge
current when the internal die temperature exceeds a +100°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.
Pinout
ISL6297
(16 LD QFN)
TOP VIEW
16 15 14 13
VIN 1
GRN 2
RED 3
TIME 4
12 VSEN
11 TEMP
10 IMIN
9 IREF
5678
Features
• Complete Charger for Single-Cell Li-ion Batteries
• Integrated Pass Element and Current Sensor
• No External Blocking Diode Required
• Very Low Thermal Dual-Mode Operation
• 0.7% Voltage Accuracy with Remote Sense
• Pre-charge circuit verification with LED status indication
• Drives a bi-color LED
• Programmable Safety Timer
• Programmable Current Limit up to 1.5A
• Programmable End-of-Charge Current
• THERMAGUARD™ Charge Current Thermal Foldback
• NTC Thermistor Interface for Battery Temperature Monitor
• Two-Level Ambient Temperature Setting
• Guaranteed to Operate at 2.65V After Start-Up
• Ambient Temperature Range: -20°C to +70°C
• Thermally-Enhanced QFN Packages
• 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 Plus Anneal Available (RoHS Compliant)
Applications
• PDAs, Cell Phones and Smart Phones
• Portable Instruments, MP3 Players
• Medical Handhelds
• Self-Charging Battery Packs
• Stand-Alone Chargers
Ordering Information
PART
NUMBER
PART
TEMP.
PKG.
MARKING RANGE (°C) PACKAGE DWG. #
ISL6297CR* ISL 6297CR -20 to +70 16 Ld 4x4 QFN L16.4x4
ISL6297CRZ* 62 97CRZ
(Note)
-20 to +70 16 Ld 4x4 QFN L16.4x4
(Pb-free)
*Add “-T” suffix for tape and reel. Please refer to TB347 for details on
reel specifications.
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 Intersil Americas Inc. Copyright Intersil Americas Inc. 2005-2006, 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

ISL6297
ISL6297
Absolute Maximum Ratings
Supply Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 7V
All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 5.5V
Recommended Operating Conditions
Ambient Temperature Range . . . . . . . . . . . . . . . . . . .-20°C to +70°C
Supply Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3V to 6.5V
Maximum Pin Voltage (Except VIN). . . . . . . . . . . . . . . . . . . . . 5.25V
Thermal Information
Thermal Resistance (Notes 1, 2)
JA (°C/W) JC (°C/W)
4x4 QFN Package . . . . . . . . . . . . . . . .
41
4
Junction Temperature Range . . . . . . . . . . . . . . . . .-55°C to +150°C
Operating Temperature Range . . . . . . . . . . . . . . . . .-40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +150°C
Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
NOTES:
1. JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
Tech Brief TB379.
2. JC, “case temperature” location is at the center of the exposed metal pad on the package underside. See Tech Brief TB379.
Electrical Specifications Typical values are tested at VIN = 5V and +25°C ambient temperature. Maximum and minimum values are
guaranteed over recommended operating conditions, unless otherwise noted.
PARAMETER
SYMBOL
TEST CONDITIONS
POWER-ON RESET, OVER VOLTAGE PROTECTION, PRE-REGULATOR
Rising VIN Threshold
Falling VIN Threshold
2.9V Reference Output Voltage
2.9V Reference Output Current
V2P9
ILOAD = 2mA
VIN-BAT Comparator Offset
STANDBY CURRENT
VBAT Pin Sink Current
VIN Pin Supply Current
VIN Pin Supply Current
Charger Reverse Current
ISTANDBY
IVIN1
IVIN2
VIN floating or EN pin is floating
BAT Pin floating, EN = LOW
BAT Pin floating, EN = HIGH
VIN = 4.3V, VSEN = BAT= 4.5V, EN = HIGH
VOLTAGE REGULATION
Output Voltage
Dropout Voltage
CHARGE CURRENT
VCH
VBAT = 3.7V, ICHARGE = 0.65A
Charge/Protection Current
Trickle Charge Current
End-of-Charge Current
CHARGE VOLTAGE THRESHOLDS
ICHARGE
ITRICKLE
RIREF = 80k, VBAT = 3.7V, VIN = 5V
RIREF = 80k, VBAT = 2.0V, VIN = 5V
RIMIN = 133k
Short-Circuit Threshold
Trickle Charge Threshold - Rising
Trickle Charge Threshold - Falling
Recharge Threshold - Falling
Difference from Final Battery Voltage
VSC
VMIN
VMIN
VRECHRG
Open Circuit Test Threshold- Rising
VOCR
MIN
2.9
2.3
-
-
30
-
-
-
-
4.17
-
900
85
56
0.9
2.7
2.6
3.90
-
-
TYP
3.4
2.4
2.9
-
-
-
1.0
0.5
-
4.20
250
1000
110
63
1.0
2.9
2.7
4.00
-210
4.4
MAX UNITS
4.0 V
2.65 V
-V
30 mA
- mV
3.0 A
1.5 mA
1.0 mA
6.0 A
4.23 V
300 mV
1100
135
70
mA
mA
mA
1.1 V
3.2 V
3.0 V
4.08 V
- mV
-V
2 FN9215.2
July 30, 2007




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