EMC5754 Datasheet | Elite Semiconductor Microelectronics Technology

Description The EMC5754 is a plete linear charger for single cell lithium-ion batteries. With small SOT-23-5 package and few external ponents, 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 40s 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 - plete linear charger both in SOT-23-5 and E-SOP-8 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/4.35V charge voltage with ±1% accuracy - Automatic recharge - Charge status indicator - C/10 charge termination - 45A shutdown supply current - 2.9V trickle charge threshold - Soft-start limits inrush current - Ro HS pliant and Pb-free Applications - Wireless handsets - Hand-held instruments - Portable information...