GENERAL DESCRIPTION

The ADP3810 and ADP3811 combine a programmable current

limit with a battery voltage limit to provide a constant current,

constant voltage battery charger controller. In secondary side,

off-line applications, the output directly drives the diode side of

an optocoupler to give isolated feedback control of a primary

side PWM. The circuitry includes two gain (gm) stages, a precision 2.0 V reference, a control input buffer, an Undervoltage

Lock Out (UVLO) comparator, an output buffer and an overvoltage comparator.

FEATURES

Programmable Charge Current

High Precision Battery Voltage Limit

Precision 2.000 V Reference

Low Voltage Drop Current Sense: 300 mV Full Scale

Full Operation in Shorted and Open Battery Conditions

Drives Diode-Side of Optocoupler

Wide Operating Supply Range: 2.7 V to 16 V

Undervoltage Lockout

SO-8 Package

ADP3810

Internal Precision Voltage Divider for Battery Sense

Four Final Battery Voltage Options Available: 4.2 V,

8.4 V, 12.6 V, 16.8 V

ADP3811

Adjustable Final Battery Voltage

APPLICATIONS

Battery Charger Controller for:

LiIon Batteries (ADP3810)

NiCad, NiMH Batteries (ADP3811)