ISL9203A

Li-ion/Li Polymer Battery Charger

Product Status: Mass Production

OVERVIEW

The ISL9203A is an integrated single-cell Li-ion or Li-polymer battery charger capable of operating with an input voltage as low as 2.4V. This charger is designed to work with various types of AC adapters.

The ISL9203A operates as a linear charger when the AC adapter is a voltage source. The battery is charged in a CC/CV (constant current/constant voltage) profile. The charge current is programmable with an external resistor up to 1.5A. The ISL9203A can also work with a current-limited adapter to minimize the thermal dissipation, in which case the ISL9203A combines the benefits of both a linear charger and a pulse charger.

The ISL9203A features charge current thermal foldback to guarantee safe operation when the printed circuit board is space limited for thermal dissipation. Additional features include preconditioning of an over-discharged battery and thermally enhanced DFN package.

KEY FEATURES

  • Complete Charger for Single-Cell Li-ion Batteries
  • Very Low Thermal Dissipation
  • Integrated Pass Element and Current Sensor
  • No External Blocking Diode Required
  • 1% Voltage Accuracy
  • Programmable Current Limit up to 1.5A
  • Charge Current Thermal Foldback
  • Accepts Multiple Types of Adapters
  • Guaranteed operation down to VIN = 2.65V after start up
  • Ambient Temperature Range: -20°C to +70°C
  • Thermally-Enhanced DFN Packages
  • Pb-Free Plus Anneal Available (RoHS Compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL9203A
Basic Information
Production Status
Mass Production
Output Voltage Typ (V)
4.2
Voltage Accuracy (%)
1
VIN1 (max) (V)
7
Output Current 1 Max (A)
1.6
Safety Timer
No
Self Termination
No
Accepts CC Adapter
Yes
VIN1 Trickle Charge (min) (% CC)
10
Thermal Regulation
Yes
Function (s)
Enable, Charge Status, Reference Voltage
Battery Chemistry
Single Cell Li+/Polymer
Qualification Level
Standard
Can Sample
YES
Temperature Range
0 to +70

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