单节锂电池充电器AIC1790的特性及应用
1 Cell Linear Lithium-Ion Battery Charger
FEATURES
Complete Linear Charger for 1 Cell Lithium-Ion Battery.
Ideal for Low-Dropout Designs for Single-Cell Li-ion or Li-Pol Packs in Space Limited Applications.
No External MOSFET, Sense Resistor or Block-ing Diode Required.
Up to 1000mA Charge Current.
Reverse Leakage Protection Prevents Battery Drainage.
Integrated Current and Voltage Regulation.
Charge Termination by 1/10 Full Charge Current.
Precharge With Safety Timer.
Status Outputs for LED or System Interface Indi-cates Charge and Fault Conditions.
Battery Insertion and Removal Detection.
Available in Tiny Thermally Enhanced MSOP10 Exposed Pad Package.
APPLICATIONS
Cellular Phones
Handheld Devices
Digital Still Cameras
MP3 Players
PDAs
Charging Docks and Cradles
USB Chargers
DESCRIPTION
The AIC1790 is highly integrated Li-ion and Li-Pol linear charge devices targeted at space limited portable applications. It offers integrated power MOSFET and current sensor, reverse blocking protection, high accuracy current and voltage regu-lation, charge status, and charge termination, in a small package.
The AIC1790 charges the battery in three phases, precharge, constant current and constant voltage. Charge is terminated based on 1/10 full charge current. An internal charge timer provides a backup safety feature for charge termination. AIC1790 automatically restarts the charge if the battery vol-tage falls below an internal threshold. AIC1790 au-tomatically enters sleep mode when VCC supply is removed.
In addition to the standard features, AIC1790 offers a multitude of additional features. These include temperature-sensing input for detecting hot or cold battery packs; power good (PG) output indicating the presence of input power.
TYPICAL APPLICATION
Copyright 2007 by Analog Integrations Corporation
