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3.7v/2100mah Li-Ion Battery Charger and 5V/4A Load sharing system controller IC

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dhineshkumar23

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Hi All

I'm looking to design a circuit that can be either wall input 5v/4A or battery powered (3.7v/4A). When plugged into a 5v wall input it should charge the battery as well as run the device from the plugged-in source. When unplugged the 3.7v battery combined with boost converter should step-up the voltage to 5v/4A. I have found some standalone Li-ion battery charge management controller. But the current is limited to maximum 2A. So if anybody can guide me in right direction to find 5V/4A battery management IC that would be great. I would like to know as well what are the important parameters to be considered while designing battery charging circuit.

Thanks
 

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