LTM8062

1

8062f

TYPICAL APPLICATION

FEATURES

DESCRIPTION

Tracking Battery Charger

tracking battery charger. The LTM8062 provides a con-

stant-current/constant-voltage charge characteristic, a 2A

maximum charge current, and employs a 3.3V float voltage

feedback reference, so any desired battery float voltage up

to 14.4V can be programmed with a resistor divider.

The LTM8062 employs an input voltage regulation loop,

which reduces charge current if the input voltage falls below

a programmed level, set with a resistor divider. When the

LTM8062 is powered by a solar panel, this input regulation

loop is used to maintain the panel at peak output power.

The LTM8062 also features preconditioning trickle charge,

bad battery detection, a choice of termination schemes

and automatic restart.

The LTM8062 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 LTM8062 is

RoHS compliant.

L, LT, LTC, LTM, Linear Technology, the Linear logo and μModule are registered trademarks of

Linear Technology Corporation. All other trademarks are the property of their respective owners.

APPLICATIONS

n

Complete Battery Charger System

n

Input Supply Voltage Regulation Loop for Peak

Power Tracking in MPPT (Maximum Peak Power

Tracking) Solar Applications

n

Wide Input Voltage Range: 4.95V to 32V

(40V Abs Max)

n

2A Charge Current

n

Resistor Programmable Float Voltage Up to 14.4V

n

Integrated Input Reverse Voltage Protection

n

User Selectable Termination: C/10 or Termination

Timer

n

0.75% Float Voltage Reference Accuracy

n

9mm

× 15mm × 4.32mm LGA Package

n

Industrial Handheld Instruments

n

12V to 24V Automotive and Heavy Equipment

n

Desktop Cradle Chargers

n

Solar Power Battery Charging

Charge Current vs Battery Voltage

8062 TA01a

LTM8062

GND

RUN

TMR

NTC

6V TO 32V

BAT

BIAS

CHRG

FAULT

ADJ

4.7μF

274k

2.87M

1-CELL

(3.6V)

BATTERY VOLTAGE (V)

0

0

2

2500

8062 TA01b

13

4

1000

500

1500

2000

NORMAL CHARGING

PRECONDITION

TERMINATION