BC3770: 2A Switch-Mode Li-ion/Li-Polymer Battery Charger
The BC3770 is a fully programmable switching charger with dual-path output for single-cell Li-Ion and Li-Polymer battery.
This dual-path output allows mobile applications with a fully discharged battery to boot up the system. High efficiency and switch-mode operation of the BC3770 reduces heat dissipation and allows for higher current capability for a given package size. In addition, the BC3770 features single input with a 20V withstanding input and charges the battery with an input current up to 2A. The charging parameters and operating modes are fully programmable over an I2C Interface that operates up to 400kHz.
The BC3770 is a highly integrated synchronous switch-mode charger, featuring integrated OVP and Power FETs. The charger and boost regulator circuits switch at 1.5MHz to minimize the size of external passive components. The BC3770 is able to operate as a boost regulator for USB-OTG function via either I2C command or an external pin from the host/processor.
The BC3770 is available in a 25-bump, 2.27mm x 2.17mm, WLCSP package.