Intersil – ISL78693: Battery Charger Extends Backup Battery Life of Automotive eCall Systems

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The ISL78693 is an integrated single-cell Li-ion or Li-polymer battery charger capable of operating with an input voltage as low as 2.65V (cold crank case). This charger is designed to work with various types of AC adapters or a USB port. The ISL78693 operates as a linear charger when the AC adapter is a voltage source. The battery is charged in a Constant Current/Constant Voltage (CC/CV) profile. The charge current is programmable with an external resistor up to 1A. The ISL78693 can also work with a current-limited adapter to minimize the thermal dissipation.

FEATURES
• Integrated power transistor and current sensor
• 1% initial voltage accuracy
• Programmable CC up to 1A
• Accepts CV and CC types of adapters or USB bus power
• Guaranteed to operate down to 2.65V after start-up
• AEC-Q100 qualified
• 700nA reverse battery leakage
• Charge current thermal foldback
• NTC thermistor interface for battery temperature alert
• Preconditioning trickle charge
• 10-pin, 3 x 3mm DFN package
• 1k MSRP: $0.99 US

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