ISL9209 Datasheet, PDF (1/11 Pages) Intersil Corporation – Charging System Safety Circuit

®
Data Sheet
April 25, 2006
ISL9209
FN6274.0
Charging System Safety Circuit
The ISL9209 is an integrated circuit (IC) optimized to provide
a redundant safety protection to a Li-ion battery 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 temperature exceeds
140°C. Together with the battery charger IC and the
protection module in a battery pack, the charging system
using the ISL9209 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 the input is overvoltage in order to remove the
power before any damage occurs. The ISL9209 has a logic
warning output to indicate the fault and an enable input to
allow the system to remove the input power.
Ordering Information
PART NUMBER PART
TEMP.
PACKAGE PKG.
(NOTE) MARKING RANGE (°C) (Pb-Free) DWG. #
ISL9209IRZ 09Z
-40 to 85 12 Ld 4x3 TDFN L12.4x3A
ISL9209IRZ-T 09Z
12 Ld 4x3 TDFN 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.
Typical Application Circuit
INPUT
VIN
C₁
OUT
ISL6292
Battery
Charger
R_ILIM
ISL9209
ILIM
VB
EN
GND
WRN
R_VB
Battery
Pack
Features
• Fully Integrated Protection Circuit for Three Protected
Variables
• High Accuracy Protection Thresholds
• User Programmable Over-Current Protection Threshold
• Input Over-Voltage Protection in Less Than 1μs
• High Immunity of False Triggering Under Transients
• Warning Output to Indicate the Occurrence of Faults
• Enable Input
• Easy to Use
• Thermal Enhanced TDFN Package
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• Cell Phones
• Digital Still Cameras
• PDAs and Smart Phones
• Portable Instruments
• Desktop Chargers
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• Technical Brief TB379 “Thermal Characterization of
Packaged Semiconductor Devices”
• Technical Brief TB389 “PCB Land Pattern Design and
Surface Mount Guidelines for QFN Packages”
Pinout
ISL9209
(4x3 TDFN)
TOP VIEW
VIN 1
VIN 2
GND 3
WRN 4
NC 5
NC 6
EPAD
12 NC
11 OUT
10 OUT
9 ILIM
8 VB
7 EN
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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