ISL9220B Switching Charger for 1-Cell Li-ion Batteries

ISL9220B

Switching Charger for 1-Cell Li-ion Batteries

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	Technical Documentation		Tools And Support
	Pricing / Samples		Related Devices

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	ISL9220BIRTZ-T	Details

Datasheet
	ISL9220B
	Switching Charger for 1-Cell Li-ion Batteries

V_OUT (typ) (V)

4.2

Voltage Accuracy (%)

V_IN1 (max) (V)

V_IN2 (max) (V)

N/A

I_OUT1 (max) (A)

I_OUT2 (max) (A)

N/A

Safety Timer

Self Termination

Accepts CC Adapter

V_IN1 Trickle Charge (min) (% CC)

V_IN2 Trickle Charge (min) (% CC)

N/A

Thermal Regulation

Functions
(Pin)

Enable, Charge Status, Fault

Product Information

Key Features

Highly Integrated Battery Charger IC
Charges 1 Li-ion or Li-Polymer Batteries
Up to 2A Charge Current
Synchronous Buck Topology, with Integrated Power FETs
1.2MHz Switching Frequency
0.5% Charge Voltage Accuracy
Input Current Limit Programmable with One External Resistor
Thermistor Interface for Battery Detection and Temperature Qualified Charging
Two Status Outputs
Programmable Charge Safety Timer
Short-Circuit and Thermal Protection
Small 4x4mm TQFN Package
-40°C to +85°C Operating Temperature Range

Description

The ISL9220B is a cost-effective and versatile battery charger for 1-cell Li-Polymer based portable applications.

The device features synchronous PWM technology, maximizing power efficiency, thus minimizing charge time and heat. The 1.2MHz switching frequency allows use of small external inductors and capacitors.

A simple charge current programming method is provided. External resistors program the fast charge and end-of-charge currents.

The two status outputs can be used to drive LEDs, or can be connected to the host processor.

A programmable charge timer provides the ability to detect defective batteries, and provides a secondary method of detecting charge termination.

A thermistor interface is provided for battery presence detection, and for temperature qualified charging conditions.

Additional features include preconditioning of an over-discharged battery, automatic recharge, and thermally enhanced QFN package.

Pricing / Packaging / Samples / Ordering

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	Part No.	Design-In Status	Temp.	Package	MSL	Price US $

	ISL9220BIRTZ-T	Active	Ind	20 Ld TQFN T+R	1	2.30

The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice.
MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020
SMD = Standard Microcircuit Drawing

Technical Documentation

Datasheet(s):
Switching Charger for 1-Cell Li-ion Batteries

Tools And Support
iSim Design Simulation
No Models Available

Applications

PDAs and Smart Phones
MP3 and Portable Media Players
Handheld GPS Devices
Digital Still Cameras
Industrial Handheld Scanners

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