LTM8061

1

8061f

TYPICAL APPLICATION

FEATURES

DESCRIPTION

32V, 2A µModule Li-Ion/

Polymer Battery Charger

standalone Li-Ion battery charger. It is optimized for one

and two-cell packs, with fixed float voltage options: 4.1V,

4.2V, 8.2V and 8.4V. The LTM8061 provides a constant-

current/constant-voltage charge characteristic, with

maximum charge current up to 2A. A precondition feature

trickle charges a depleted battery, and bad battery detec-

tion provides a signal and suspends charging if a battery

does not respond to preconditioning.

The LTM8061 can be configured to terminate charging

when charge current falls to one-tenth the programmed

maximum current or to use an internal timer if a time-

based termination scheme is desired. Once charging is

terminated, the LTM8061 enters a low current standby

mode. An auto-restart feature starts a new charge cycle if

the battery voltage drops 2.5% from the float voltage, or

if a new battery is inserted into a charging system.

The LTM8061 is packaged in a thermally enhanced, com-

pact (9mm

× 15mm × 4.32mm) over-molded land grid

array (LGA) package suitable for automated assembly

by standard surface mount equipment. The LTM8061 is

RoHS compliant.

Standalone Single Cell 2A Li-Ion Battery Charger

with C/10 Termination from 6V to 32V Input

APPLICATIONS

(40V Absolute Maximum)

1-Cell: 4.1V, 4.2V

2-Cell: 8.2V, 8.4V

Onboard Termination Timer

× 15mm × 4.32mm) Surface

Mount LGA Package

RUN

RNG/SS

TMR

NTC

BAT

BIAS

CHRG

FAULT

GND

8061 TA01a

LTM8061-4.1

6V TO 32V

4.7μF

AVAILABLE OPTIONS:

1-CELL: 4.1V, 4.2V

2-CELL: 8.2V, 8.4V

SINGLE

CELL

4.1V

BATTERY

+

L, LT, LTC, LTM, Linear Technology, Linear logo, μModule and PolyPhase are registered

trademarks and PowerPath is a trademark of Linear Technology Corporation. All other

trademarks are the property of their respective owners

Battery Charging Profile

BATTERY VOLTAGE (V)

0

0

500

1000

1500

2

2500

8061 TA01b

13

4

2000

NORMAL CHARGING

TERMINATION

PRECONDITION