Description
Laptop Chip ADP3806 High-Frequency Switch Mode Li-Ion Battery Charger chipset
Description:
The ADP3806 is a complete Li-Ion battery-charging IC. The device combines high output voltage accuracy with constant current control to simplify the implementation of Constant- Current, Constant-Voltage (CCCV) chargers. The ADP3806 is available in three options. The ADP3806-12.6 guarantees the final battery voltage be selected to 12.6 V or 16.8 V, the ADP3806-12.5 guarantees 12.525 V/16.7 V and the ADP3806 is adjustable using two external resistors to set the battery voltage.
The current sense amplifier has rail-to-rail inputs to accurately operate under low drop out and short circuit conditions. The charge current is programmable with a dc voltage on ISET.
A second differential amplifier senses the system current across an external sense resistor and outputs a linear voltage on the ISYS pin. The bootstrapped synchronous driver allows the use of two NMOS transistors for lower system cost. 
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This product was added to our catalog on Wednesday 15 November, 2017.
