Mp2615 CC-charge current

Battery Management
1

Hello,

I use the MP2615GQ IC to charge the 2s lithium polymer battery. I have input currents of 2 different inputs, 12V 2A and 12V 0.25A. If I choose the Rs1 resistor (current sensor resistance) as 50m ohm (2A) for the programmable CC charging current, could there be a problem for my circuit if the input providing 0.25A current is used?
Thanks in advance for your answer.

2

Hi,

If you use 50m ohms Rs1 for your 0.25A input, the input power is 12V0.25A=3W, but the output power is 7V2A=14W approximately, so it is impossible. You can not use 50m ohms Rs1 for your 0.25A input.

Best,
Fox

3

thanks for your answer. As I said, there will be two different attempts to be used at different times. Even if I use the input with low power value (3W) and the resistor value is 50m ohms, shouldn’t the output current provide 3/7 = 0.42 amperes? And will this cause any problems for integrated operation?