In the Tube package, you will find it.To make it easier for you, it is included with the 16-WFQFN Exposed Pad package.There is a mounting type of Surface Mount for this device.Keeping the temperature at -40°C~125°C TJ will ensure reliable performance.BATTERY CHARGE CONTROLLER is the analog IC used in this device.The device requires Constant - Programmable of current to charge.This part number LTC4121 can be used to find its related parts.In total, there are 16 terminations.Battery pack voltage is 4.2V.In total, it has 16 pins.As far as the charging current is concerned, it is 400mA at full charge.In order for it to work, it requires 16 pins.A 15V battery should be sufficient.40V supply voltage is not a problem for it.During normal operation, Vsup should remain above 4.4V.
LTC4121IUD-4.2#PBF Features
Battery pack voltage of 4.2V 16-WFQFN Exposed Pad package
LTC4121IUD-4.2#PBF Applications
There are a lot of Linear Technology/Analog Devices LTC4121IUD-4.2#PBF Battery Chargers ICs applications.