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发布者:微桥 发布时间:2012-6-21 阅读:4474次    关键字: 锂电充电
EMC5045-Standalone Linear Li-Ion Charger


EMC5045-Standalone Linear Li-Ion Charger with Thermal Regulation DataSheet

General Description
    The EMC5045 is a complete linear charger for single cell lithium-ion batteries. With E-SOP-8 packages and few external components, EMC5045 is well suited for portable applications. In addition, the EMC5045 is specifically designed to work within USB power specifications.
    No external sense resistor and blocking diode are required. Charging current can be programmed externally with a single resistor. The built-in thermal regulation facilitates charging with maximum power without risk of overheating.
    The EMC5045 always preconditions the battery with 1/10 of the programmed charge current at the beginning of a charge cycle, after it verifies that the battery can be fast-charged. The EMC5045 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached.
    The EMC5045 features 6.5V maximum rating voltage for AC adapter, and it provides the charge current up to 1.2A. Other features include battery temperature monitoring, reverse current protection, shutdown mode, charging current monitor, under voltage lockout, automatic recharge and status indicator.

Features
g Programmable charge current up to 1.2A
g No MOSFET, sense resistor or blocking diode required
g Complete linear charger in E-SOP-8 for single
cell li-ion batteries
g Thermal regulation maximizes charge rate without risk of overheating
g Thermistor input for temperature qualified charging
g Charges single cell Li-ion batteries directly from USB port.
g Preset 4.2V charge voltage with ±1% accuracy
g Automatic recharge
g Charge status indicator
g C/10 charge termination
g Battery reverse leakage current less than 1uA
g Over voltage protection up to 13.5V

Applications
g Wireless handsets
g Hand-held instruments
g Portable information appliances

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