© 1997 SEMTECH CORP.

652 MITCHELL ROAD NEWBURY PARK CA 91320

BATTERY

CHARGE CONTROLLER

SC1766

Janaury 30, 1998

TYPICAL APPLICATIONS (cont.)

Step Down Low-Side Current Sense Battery Charger

Test Circuit

Discharge Circuit of

Rechargeable Battery

FINAL VOLTAGE

OF BATTERY

R26

6V

6.8K

5V

5.1K

4V

3.9K

3V

2.7K

Buzzer Circuit for Trickle Charge Mode

NOTE: Frequency (about 1Hz) is determined by R33 and C33.

Buzzer will be activated when LED pin goes low.

NOTE: Frequency (about 1Hz) is determined by R33 and C33.

LED will flash when LED pin goes low.

Flashing-LED Circuit for Trickle Mode

NOTE: The final voltage of battery is determined by R26.

Discharge current is decided by R5. S1: Push to initiate discharge.