LTM8061_15 Datasheet, PDF (1/22 Pages) Linear Technology – 32V, 2A Module Li-Ion/ Polymer Battery Charger

Features
n _{Wide Input Voltage Range: 4.95V to 32V}
(40V Absolute Maximum)
n _{Float Voltage Options:}
1-Cell: 4.1V, 4.2V
2-Cell: 8.2V, 8.4V
n _{Programmable Charge Current: Up to 2A}
n _{User-Selectable Charge Termination: C/10 or}
Onboard Termination Timer
n _{Dynamic Charge Rate Programming/Soft-Start Pin}
n _{Programmable Input Current Limit}
n _{Optional Reverse Input Protection}
n _{NTC Resistor Temperature Monitor}
n _{0.5% Float Voltage Accuracy}
n _{Bad-Battery Detection with Auto-Reset}
n _{Tiny, Low Profile (9mm × 15mm × 4.32mm) Surface}
Mount LGA Package
Applications
n _{Industrial Handheld Instruments}
n _{12V to 24V Automotive and Heavy Equipment}
n _{Professional Video/Camera Chargers}
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
LTM8061
32V, 2A µModule Li-Ion/
Polymer Battery Charger
Description
The LTM^®8061 is a high efficiency 32V, 2A µModule^®
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
detection 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.
Typical Application
Standalone Single Cell 2A Li-Ion Battery Charger
with C/10 Termination from 6V to 32V Input
V_IN
6V TO 32V
4.7µF
LTM8061-4.1
V_INA
BAT
V_INC/CLP
BIAS
V_IN
RUN
RNG/SS
CHRG
TMR
FAULT
NTC
GND
8061 TA01a
+ SINGLE
CELL
4.1V
BATTERY
AVAILABLE OPTIONS:
1-CELL: 4.1V, 4.2V
2-CELL: 8.2V, 8.4V
Battery Charging Profile
2500
2000
NORMAL CHARGING
1500
1000
500
0
0
PRECONDITION
TERMINATION
1
2
3
BATTERY VOLTAGE (V)
4
8061 TA01b
For more information www.linear.com/LTM8601
8061fa
1