ADP2291ARMZ Part Information

Details for ADP2291ARMZ by Analog Devices

Electronic & Electrical Components>Semiconductors - ICs>Battery Management

Part Description

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 tem- perature. 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-lead MSOP package and a 3 × 3 mm LFCSP package that is ideally suited for small, portable applications.

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Part 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 u00b11% accuracy over line and temperature 1 u00b5A shutdown supply current Small, 8-lead MSOP and 3 u00d7 3 mm LFCSP packages

Part Specifications

Battery Type Li-Ion
Input Voltage 12V
Battery Charge Voltage 4.2V
Charge Current Max 1.5A
Battery IC Case Style MSOP
No. of Pins 8Pins
No. of Series Cells 1
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (07-Jul-2017)
Base Number 2291
Battery Management Function Charge Controller
Operating Temperature Range -40°C to +85°C
Output Voltage Max 4.242V
Supply Voltage Min 4.5V
Termination Type Surface Mount Device
RoHS Compliant

Frequently Asked Questions

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What category does ADP2291ARMZ fall under?

The ADP2291ARMZ is listed under Electronic & Electrical Components > Semiconductors - ICs > Battery Management.

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Is the ADP2291ARMZ RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Farnell.

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