The ISL9204 is a cost-effective, fully integrated high input

voltage single-cell Li-ion battery charger. This charger

performs the CC/CV charge function required by Li-ion

batteries. The charger accepts an input voltage up to 28V

but is disabled when the input voltage exceeds the OVP

threshold, minimum 10V, to prevent excessive power

dissipation. The 28V rating eliminates the overvoltage

protection circuit required in a low input voltage charger.

The charge current and the end-of-charge (EOC) current are

programmable with external resistors. When the battery

voltage is lower than a typical value of 2.8V, the charger

preconditions the battery with typically 17 of the

programmed charge current. When the charge current

reduces to the programmable EOC current level during the

CV charge phase, an EOC indication is provided by the CHG

pin, which is an open-drain output. An internal thermal

foldback function protects the charger from any thermal

failure.

Two indication pins (PPR and CHG) allow simple interface to

a microprocessor or LEDs. When no adapter is attached or

when disabled, the charger draws less than 1µA leakage

current from the battery.

Features

• Complete Charger for Single-Cell Li-ion/Polymer Batteries

• Integrated Pass Element and Current Sensor

• No External Blocking Diode Required

• Low Component Count and Cost

• 1 Voltage Accuracy

• Programmable Charge Current

• Programmable End-of-Charge Current

• Charge Current Thermal Foldback for Thermal

Protection

• Trickle Charge for Fully Discharged Batteries

• 28V Maximum Voltage for the Power Input

• Power Presence and Charge Indications

• Less than 1µA Leakage Current Off the Battery when No

Input Power Attached or Charger Disabled

• Ambient Temperature Range: -40°C to 85°C

• 2x3 DFN 8 Ld Packages

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• Mobile Phones

• Blue-Tooth Devices

• PDAs

• MP3 Players

• Stand-alone Chargers

• Other Handheld Devices