深圳市微桥科技有限公司

EMC5754-Standalone Linear Li-Ion Battery Charger with Thermal Regulation in SOT-25  SOP-8-EP DataSheet 

General Description

    The EMC5754 is a complete linear charger for single cell lithium-ion batteries. With small SOT-25 package and few external components, EMC5754 is well suited for portable applications. In addition, the EMC5754 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 EMC5754 always preconditions the battery with 1/10 of the programmed charge current at the beginning of a charge cycle, until 40μs after it verifies that the battery can be fast-charged. The EMC5754 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached.

    The EMC5754 consumes zero reverse current from the battery at standby, shutdown and sleep modes. This feature reduces the charge and discharge cycles on the battery, further prolonging the battery life. The EMC5754 can also be used as a LDO when battery is removed. Other features include shutdown mode, charge current monitor, under voltage lockout, automatic recharge and status indicator.

Features

 Programmable charge current up to 1A

 No MOSFET, sense resistor or blocking diode required

 Complete linear charger in SOT-25 for single cell Lithium-ion batteries

 Typical zero reverse current from battery

 Thermal regulation maximizes charge rate without risk of overheating

 Charges single cell Li-ion batteries directly from USB port

 Act as a LDO when battery is removed

 Preset 4.2V charge voltage with ±1% accuracy

 Automatic recharge

 Charge status indicator

 C/10 charge termination

 45μA shutdown supply current

 2.9V trickle charge threshold

 Soft-start limits inrush current

 RoHS compliant and Pb-free

Applications

 Wireless handsets

 Hand-held instruments

 Portable information appliances

 Bluetooth application

 Charging docks and cradles