臺灣明智類比有限公司
臺北市內湖科學園區11493洲子街
臺灣總部電話:
00886-283598088
深圳辦事處：
周小姐
電話：18902476385
地址：深圳市南山區科技園高新南路賦安科技大廈A座
IA1408 is a complete constant-current & constant voltage linear charger for single cell lithium-ion and Lithium-Polymer batteries. Its SOT-23 package and low external component count make IA1408 ideally suited for portable applications. Furthermore, the IA1408 is specifically designed to work within USB power specification. At the same time, IA1408 can also be used in the standalone lithium-ion and Lithium-polymer battery chargers. No external sense resistor is needed, and no blocking diode is required due to the internal MOSFET architecture. Thermal feedback regulates the charge current to limit the die temperature during high power operation or high ambient temperature. The charge voltage is fixed at 4.2V, and the charge current can be programmed externally with a single resistor. The IA1408 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached.
When the input supply (wall adapter or USB supply) is removed, the IA1408 automatically enters a low current stage, dropping the battery drain current to less than 1uA. The IA1408 can be put into shutdown mode, reducing the supply current to 25uA.
Other features include charge current monitor, undervoltage lockout, automatic recharge and a status pin to indicate charge termination and the presence of an input voltage. IA1408 is intentionally designed to have slightly negative Tempco. This provides extra protection to Lithium battery during charging.
Features:
Reverse connection protection of positive and negative electrode of battery
BAT short circuit IC stop working
VIN voltage is too high chip automatically stop working
Compatible size 3mA-200mA programmable charge current.
No MOSFET, Sense Resistor or Blocking Diode Required.
Constant-Current/Constant-Voltage Operation with Thermal Protection to Maximize Charge Rate without Risk of Overheating.
Charges Single Cell Li-Ion Batteries Directly from USB Port.
Preset 4.2V Charge Voltage with ±1% Accuracy
2.9V Trickle Charge Threshold
Soft-Start Limits Inrush Current.
Typical Application:
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