ACE4702 Datasheet, PDF (1/15 Pages) ACE Technology Co., LTD. – 2 Cell Li-ion Battery Charger IC

ACE4702
2 Cell Li-ion Battery Charger IC
Description
The ACE4702 is a PWM switch-mode lithium ion battery charger controller for 2 cell li-ion battery in a
small package using few external components.
The ACE4702 is specially designed for charging lithium ion battery with constant current and constant
voltage mode. In constant voltage mode, the regulation voltage is fixed at 8.4V with ±1% accuracy. The
constant charging current is programmable with a single sense resistor.
Deeply discharged batteries are automatically trickle charged at 15% of the programmed constant
charging current until the cell voltage exceeds 2.8V/cell. The charge cycle is terminated once the charging
current drops to a level set by an on-chip resistor and an external resistor, and a new charge cycle
automatically restarts if the battery voltage falls below 4V/cell. ACE4702 will automatically enter sleep
mode when input voltage is lower than battery voltage.
Other features include undervoltage lockout, battery temperature monitoring and status indication, etc.
ACE4702 is available in a space-saving 16-pin TSSOP package.
Features
• Wide Input Voltage: 7.5V to 28V
• Complete Charger Controller for 2 cell Lithium-ion Battery
• Charge Current Up to 5A
• High PWM Switching Frequency: 300KHz
• Constant Charging Voltage Accuracy: ±1%
• Charging Current is programmed with a sense resistor
• Automatic Conditioning of Deeply Discharged Batteries
• End-of-Charge Current can be set by an external resistor
• Battery Temperature Monitoring
• Automatic Recharge
• Charger Status Indication
• Soft Start
• Battery Overvoltage Protection
• Operating Ambient Temperature
• -40℃ to ＋85℃
• Available in 16 pin TSSOP Package
• Pb-free, RoHS Compliant, and Halogen Free
Application
• Portable DVD, Walkie-Talkie
• Notebook Computers
• Battery-Backup Systems
• Portable Industrial and Medical Equipment
• Standalone Battery Chargers
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