廬
ISL9212A
Data Sheet
November 14, 2006
FN6384.0
Charging System Safety Circuit
The ISL9212A is an integrated circuit (IC) optimized to
provide a Li-ion battery redundant safety protection from
failures of a charging system. The IC monitors the input
voltage, the battery voltage, and the charge current. When
any of the three parameters exceeds its limit, the IC turns off
an internal P-channel MOSFET to remove the power from
the charging system. In addition to the above protected
parameters, the IC also monitors its own internal
temperature and turns off the P-channel MOSFET when the
die temperature exceeds +140擄C. Together with the battery
charger IC and the protection module in a battery pack, the
charging system using the ISL9212A has triple-level
protection and is two-fault tolerant.
The IC is designed to turn on the internal PFET slowly to
avoid inrush current at power-up but will turn off the PFET
quickly when input overvoltage is detected, in order to remove
the power before any damage occurs. The ISL9212A has a
logic warning output to indicate the fault and an enable input
to allow the system to remove the input power.
Features
鈥?Fully Integrated Protection Circuit for Three Protection
Variables
- User Programmable Overcurrent Protection Threshold
- Input Overvoltage Protection in Less Than 1碌s
- Battery Overvoltage Protection
鈥?High Immunity of False Triggering Under Transients
鈥?High Accuracy Protection Thresholds
鈥?Warning Output to Indicate the Occurrence of Faults
鈥?Enable Input
鈥?Thermal Enhanced DFN Package
鈥?Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
鈥?Cell Phones
鈥?Digital Still Cameras
鈥?PDAs and Smart Phones
鈥?Portable Instruments
鈥?Desktop Chargers
Ordering Information
PART
NUMBER
ISL9212AIRZ*
(Note)
TEMP.
RANGE
PART
(擄C)
MARKING
2AZ
PACKAGE
PKG.
DWG. #
Related Literature
鈥?Technical Brief TB363 鈥淕uidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)鈥?/div>
鈥?Technical Brief TB379 鈥淭hermal Characterization of
Packaged Semiconductor Devices鈥?/div>
鈥?Technical Brief TB389 鈥淧CB Land Pattern Design and
Surface Mount Guidelines for QFN Packages鈥?/div>
-40 to +85 12 Ld 4x3 TDFN L12.4x3A
(Pb-free)
ISL9200EVAL1 ISL9200 Evaluation Board
*Add 鈥?T鈥?suffix for tape and reel.
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
ISL9212A
(12 LD 4x3 DFN)
TOP VIEW
Typical Application Circuit
INPUT
VIN
VIN
OUT
ISL6292
BATTERY
CHARGER
VIN
GND
WRN
ISL9212A
ILIM
VB
R
VB
EN
R
ILIM
GND
WRN
BATTERY
PACK
+
NC
NC
1
2
3
4
5
6
12 NC
11 OUT
EPAD
10 OUT
9
8
7
ILIM
VB
EN
C
1
NOTE: EPAD must be electrically connected to the GND pin.
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 漏 Intersil Americas Inc. 2006. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
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