1

®

FN9174.1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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ISL6294

High Input Voltage Charger

The ISL6294 is a cost-effective, fully integrated high input

voltage single-cell Li-ion battery charger. The charger uses a

CC/CV charge profile required by Li-ion batteries. The

charger accepts an input voltage up to 28V but is disabled

when the input voltage exceeds the OVP threshold, typically

6.8V, to prevent excessive power dissipation. The 28V rating

eliminates the overvoltage protection circuit required in a low

input voltage charger.

The charge current and the end-of-charge (EOC) current are

programmable with external resistors. When the battery

voltage is lower than typically 2.55V, the charger

preconditions the battery with typically 20% of the

programmed charge current. When the charge current

reduces to the programmable EOC current level during the

CV charge phase, an EOC indication is provided by the CHG

pin, which is an open-drain output. An internal thermal

foldback function protects the charger from any thermal

failure.

Two indication pins (PPR and CHG) allow simple interface to

a microprocessor or LEDs. When no adapter is attached or

when disabled, the charger draws less than 1µA leakage

current from the battery.

Features

• Complete Charger for Single-Cell Li-ion/Polymer Batteries

• Integrated Pass Element and Current Sensor

• No External Blocking Diode Required

• Low Component Count and Cost

• 1% Voltage Accuracy

• Programmable Charge Current

• Programmable End-of-Charge Current

• Charge Current Thermal Foldback for Thermal

Protection

• Trickle Charge for Fully Discharged Batteries

• 28V Maximum Voltage for the Power Input

• Power Presence and Charge Indications

• Less Than 1µA Leakage Current off the Battery When No

Input Power Attached or Charger Disabled

• Ambient Temperature Range: -40°C to 85°C

• 8 Ld 2x3 DFN Packages

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• Mobile Phones

• Blue-Tooth Devices

•PDAs

• MP3 Players

• Stand-Alone Chargers

• Other Handheld Devices

Pinout

ISL6294

(8 LD DFN)

TOP VIEW

Ordering Information

PART

NUMBER

PART

MARKING

TEMP.

RANGE (°C)

PACKAGE

PKG.

DWG. #

ISL6294IRZ-T

(Note)

94Z

-40 to 85

8 Ld 2x3 DFN

(Pb-free)

L8.2x3

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.

2

3

4

1

7

6

5

8

VIN

PPR

CHG

EN

BAT

IREF

IMIN

GND

Data Sheet

October 4, 2005