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<MAX>)

Applications
■ Solar mobile phone
■ Solar audio
■ Solar portable charger
■ Solar LED illumination