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ADP3811 Datasheet Secondary Side/ Off-Line Battery Charger Controllers

Manufacturer: Analog Devices

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General Description

Secondary Side, Off-Line Battery Charger Controllers ADP3810/ADP3811 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.

The current limit amplifier senses the voltage drop across an external sense resistor to control the average current for charging a battery.

Overview

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Key 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.

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