Part Number:BQ25713
Hello TI power forum,
I'm testing a design based on the BQ25713 and have noticed that occasionally when cycling the power (VBUS) that the switcher will not start up but VSYS stays just over 1V and the SYS_SHORT bit is set. I've tried but cannot reproduce this behavior on the EVM module. We've stayed very close to the EVM reference design so I'm not too sure what is causing this issue. If I manually clear the SYS_SHORT bit then the switcher will immediately start-up.
Some additional observations. With the EV2400 connected and battery management studio open and monitoring the BQ25713 registers I notice that the SYS_SHORT bit actually gets set on a power down event (only sometimes). If I then turn power on immediately it will be stuck on a SYS_SHORT and power cycling will not help unless I power down long enough for the capacitance to drain and SYS_SHORT bit resets (about 5 seconds).
Any idea as to why this is occurring?? This seems to happen in about every 1 in 10 power downs and will only really manifest itself if I power up right away while the SYS_SHORT bit is set.
Thanks,
Dan C.