1

®

FN9173.4

ISL6298

Li-ion/Li-Polymer Battery Charger

The ISL6298 is an integrated single-cell Li-ion or Li-polymer

battery charger optimized for low current applications. The

targeted applications include mini-disk (MD) players, Blue

Tooth headsets, or other applications that use low-capacity

battery cells.

The ISL6298 is a linear charger that charges the battery in a

CC/CV (constant current/constant voltage) profile. The

charge current is programmable with an external resistor up

to 450mA during the CC phase. Once the battery voltage

reaches 4.2V (or 4.1V), the charger enters CV mode and the

charge current starts to reduce. When the charger current

drops to a user-programmable threshold, the charger

indicates the end-of-charge with a STATUS pin. The charger

does not actually terminate until a user-programmable total

fast charge time is reached. If the battery voltage drops to a

recharge threshold after termination, the charger will re-

charge the battery to its full capacity. The charger

preconditions the battery with 20% of the programmed CC

current if the battery voltage is below 2.8V. The total

precharge time is limited to 1/8 of the total fast charge time.

The ISL6298 features charge current thermal foldback to

guarantee safe operation when the printed circuit board is

space-limited for thermal dissipation. Additional features

include an NTC thermistor interface for monitoring the

ambient temperature, the ability to disable the time limit of

the fast charge, an FAULT indication, and a thermally

enhanced QFN or DFN package.

Features

• Complete Charger for Single-Cell Li-ion Batteries

• Integrated Pass Element and Current Sensor

• No External Blocking Diode Required

• 1% Voltage Accuracy

• Programmable Current Limit up to 450mA

• Programmable End-of-Charge Current

• Preconditioning with 20% Fast Charge Current

• 10% Accuracy at 250mA

• Charge Current Thermal Foldback

• NTC Thermistor Interface for Battery Temperature Monitor

• User Programmable Safety Timer

• Ambient Temperature Range: -20°C to 70°C

• Thermally-Enhanced QFN Packages

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• MD Players, Blue-Tooth Headsets and MP3 Players

• Portable Instruments

• PDAs, Cell Phones and Smart Phones

• Stand-Alone 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 # (NOTE)

PART

MARKING

TEMP.

RANGE

(°C)

PACKAGE

(Pb-FREE)

PKG.

DWG. #

ISL6298CR4Z

6298CR4Z -20 to 70 16 Ld 4x4 QFN L16.4x4

ISL6298CR4Z-T

6298CR4Z 16 Ld 4x4 QFN Tape and Reel

ISL6298-2CR3Z

982Z

-20 to 70 10 Ld 3x3 DFN L10.3x3

ISL6298-2CR3Z-T 982Z

10 Ld 3x3 DFN Tape and Reel

ISL6298-2CR4Z

6298CR4Z -20 to 70 16 Ld 4x4 QFN L16.4x4

ISL6298-2CR4Z-T 6298CR4Z 16 Ld 4x4 QFN 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.

Pinouts

ISL6298 (16 LD QFN)

TOP VIEW

ISL6298 (10 LD DFN)

TOP VIEW

1

3

4

15

VIN

FAULT

STATUS

TIME

16

14 13

2

12

10

9

11

6

57

8

VBAT

TEMP

IMIN

IREF

VIN

FAULT

STATUS

TIME

GND

VBAT

TEMP

IREF

V2P8

EN

2

3

4

1

5

9

8

7

10

6

Data Sheet

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

1-888-INTERSIL or 1-888-468-3774

Copyright © Intersil Americas Inc. 2004-2006. All Rights Reserved.

All other trademarks mentioned are the property of their respective owners.

March 9, 2006