ADP2291

PRODUCTION

ADP2291

Compact, 1.5 A Linear Charger for Single-Cell Li+ Battery

PRODUCTION

Not the part you were looking for?

Go to Product Selection Table

View All Documentation

Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

Other places you can find help

Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 1

1ku List Price Starting From $1.83

Features

Simple, Safe Linear Charger for Single Cell Lithium Battery
4.5 V to 12 V Input Voltage Range
Adjustable Charging Current up to 1.5 A
Low Cost PNP External Pass Element
Automatic Reverse Isolation with No External Blocking Diode
Output Overshoot Protection

Deep Discharge Precharge Mode
Thermal Shutdown
Automatic Recharge
Programmable Termination Timer
LED Charging Status Indicator
4.2 V Output Voltage with ±1% Accuracy Over Line and Temperature.

Additional Details

The ADP2291 is a constant-current/constant-voltage linear charger for a single cell lithium ion battery, requiring just a few components to provide a simple and safe charging system that operates from a wide 4.5 V to 12 V input voltage range. It features an internally controlled, multistep charging cycle that improves battery life.

An external, low cost, PNP provides the charging current to the battery and an external resistor sets the maximum charge current. A small external capacitor programs the maximum charge time. The controller includes an LED driver to indicate the battery charging status.

Safety features include charging stop mode for battery faults, output overshoot protection, and thermal shutdown. The ADP2291 also features automatic reverse isolation, which does not require an additional blocking diode.

The multistep charge cycle optimizes the battery charging time in a safe manner. It features a trickle charge mode for a deeply discharged cell and a fast charging mode with a maximum current of 1.5 A. The ADP2291 controls the end of charge with a 4.2 V output voltage that is 1% accurate over line and temperature. It automatically recharges the battery if the cell voltage drops. When the input supply is removed, the part enters a low current state and reduces the current drawn from the battery to below 1 µA.

The ADP2291 is available in both a small, 8-pin MSOP package and a 3 × 3 mm LFCSP package that is ideally suited for small, portable applications.

View All Documentation

Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

Other places you can find help

Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 1

1ku List Price Starting From $1.83

Technical Documents 3

ADP2291: Compact, 1.5 A Linear Charger for Single-Cell Li+ Battery Data Sheet (Rev.A) 10/01/2004

Reverse Voltage Protection for Battery Chargers 06/01/2020

ADP2291 Evaluation Tools (ADP2291-EVAL) 01/28/2005

Design Resources 1

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.