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For 2Cell Solar, Synchronous Switch-Mode Charger IC - BU1840AMUV

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. It is possible to boost it according to the voltage of 2 cell solar panel with built-in the function to boost the low voltage input. Moreover, the solar battery maximum dissipation can be drawn out with built-in the peak power track function. It is possible to select the the switching frequency according to the terminal SEL. It is also possible to monitor the charging current by the I2C interface. Built in heat reckless driving protection (Thermal shutdown), decrease voltage protection, and input current protection for protection function.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part number
Status
Package
Unit Quantity
Minimum Package Quantity
Packing Type
RoHS
BU1840AMUV-E2 Active VQFN024V4040 2500 2500 Taping Yes
 
Specifications:
Grade Standard
Supply Voltage(Min.)[V] 0.625
Supply Voltage(Max.)[V] 1.98
ON Resistance [mΩ] 100
Operating Temperature (Min.)[°C] -30
Operating Temperature (Max.)[°C] 85
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)
 
 
Technical Data
Application Note

Thermal Resistance