General Description

The BU1840AMUV device provides the best system to the product charged with 1cell Li-ion battery and 3cell Nickel-metal-hydride batteries using the 2cell, 3cell, and 4cell solar panel.

Features

■ Synchronous Switch-Mode Charger for 2Cell Solar 400mA@Battery=3.7V,VIN=1V

■ MPPT control voltage range： 0.7V～ 1.5V

■ Charging current completion voltage： 5.0V (hysteresis: 0.075V)

■ Built in MPPT

■ Switching frequency (160kHz,320kHz)

■ Charging current monitor by I2C

■ UVLO-detect Voltage:0.625V

■ UVLO-release Voltage:0.700V

■ Thermal Shutdown

■ 24 pin VQFN024V4040 (4.1mm× 4.1mm)

Applications

■ Solar mobile phone

■ Solar audio

■ Solar portable charger

■ Solar LED illumination