FN6399 Rev 0.00

Page 1 of 11

March 21, 2007

FN6399

Rev 0.00

March 21, 2007

ISL9212B

Charging System Safety Circuit

DATASHEET

The ISL9212B 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°C. Together with the battery

charger IC and the protection module in a battery pack, the

charging system using the ISL9212B 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

ISL9212B has a logic warning output to indicate the fault and

an enable input to allow the system to remove the input

power.

Typical Application Circuit

Features

• Fully Integrated Protection Circuit for Three Protection

Variables

- User Programmable Overcurrent Protection Threshold

- Input Overvoltage Protection in Less Than 1µs

- Battery Overvoltage Protection

• High Immunity of False Triggering Under Transients

• High Accuracy Protection Thresholds

• Warning Output to Indicate the Occurrence of Faults

• Enable Input

• Thermal Enhanced DFN 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”

Ordering Information

PART

NUMBER

PART

MARKING

TEMP.

RANGE

(°C)

PACKAGE

PKG.

DWG. #

ISL9212BIRZ*

(Note)

2BZ

-40 to +85 12 Ld 4x3 TDFN

(Pb-free)

L12.4x3A

ISL9212EVAL1 ISL9212B Evaluation Board

*Add “-T” 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.

INPUT

ISL6292

BATTERY

CHARGER

BATTERY

PACK

ISL9212B

ILIM

WRN

VIN

GND

VB

OUT

EN

+

Pinout

ISL9212B

(12 LD 4x3 TDFN)

TOP VIEW

NOTE: EPAD must be electrically connected to the GND pin.

VIN

VIN

GND

WRN

OUT

ILIM

VB

NC

OUT

NC

NC

EN

2

3

4

1

5

11

10

9

12

8

6

7

EPAD