Other Parts Discussed in Thread: BQ24170,
Hello,
I am using CSD17313Q2 mosfets in my device for battery charging circuit which is designed on BQ24170 IC. I have currently 10 PCBs and out of 10, in 2 PCBs, the Mosfets are getting significantly hot when a current is flowing through them. The current flowing for each boards is about the same(1.2A). The temperature of the PCB near the mosfets is 35-37 degrees in 8 PCBs. But for the 2 which i mentioned above, temperature is is 47-51 degrees.
So I am not sure what could be the possible reason for this.
Is it that the part itself may have some variation from piece to piece?
Or it could be the assembly of the part? (By physically looking , it doesn't seem different compared to other PCBs. But if this could be a suspect, i can get it checked by assembly team using Xray.)
In my current layout design, I have missed to put stitching Vias near the mosfets. But I will put this into my next revision of PCBAs. Will this help if there is peice to piece variation in the mosfet part itself?
Also, is there a possibility that if the mosfets are getting so hot every time I charge my battery, later on there could be any reliability issue? Or the mosfet is still good enough to sustain ?
Kindly provide suggestion/inputs to handle this scenario.
Thanks,
Siddharth