锂电池充电器

ETA4044

ETA4044 is a single cell, fully integrated constant current(CC)/constant voltage (CV) Li-ion battery charger. Its compact package with minimum external components requirement makes the ETA4044 ideal for portable applications. No external sense resistor or blocking diode is necessary for the ETA4044. Build-in thermal feedback mechanism regulates the charge current to control the die temperature during high power operation or at elevated ambient temperature. The ETA4044 has a pre-charge function for trickle charging deeply discharged batteries. The fast charge current can be programmed by an external resistor. CV regulation mode is automatically enabled once the battery's charging curve reaches the constant voltage portion. The output current then decays and is finally terminated once the charge current drops to 1/10th of the programmed value. The ETA4044 keeps monitoring the battery voltage and enables a new charge cycle once the voltage drops by 150mV below the CV value

ETA4044 is in a tiny SOT23-5 package.

FEATURES
16V standoff input voltage at VIN and BAT pins
4.2V charge termination voltage
Charge current up to 750mA in SOT23-5 package
No damage when battery reversely connected
25uA supply current when standby
Soft-start limits in-rush current
S0T23-5 Package

APPLICATIONS
Toys
Bluetooth applications
Li-ion battery powered devices

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