Hi I am using an MP2617B with a lithium-ion 18650 cell and the output of the system uses a MP3424 step up converter to generator +5V. The system uses 5V/1A under normal conditions or less, but periodically sees a transient current spike (4-5A for 150-200 us from the 5V output, so the battery is seeing closer to 6-8A). This transient current spike causes the output voltage to be interrupted causing a fault condition. This does not occur when using external power provided by a 5V/3A USB-C adapter and the battery is capable of much higher current values. Is there anything which can be done to still utilize the MP2617? The datasheet on page 21 discusses battery discharge protection which limits the chip to output more than 5A. I believe this is the MP2617 discharge protection circuit limiting the output . Is there any possible way to bypass this current limit or slow down the pulse? I have tried placing additional electrolytic capacitors on the 5V output stage, but that did not provide much help.
Hi eprast,
We’ve reached out to you via email, and we’ll talk more about this through there.