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problem with bq500212A that comes and goes

Other Parts Discussed in Thread: BQ500212A

Hi

I posted this few weeks ago:

http://e2e.ti.com/support/power_management/wireless_power/f/693/t/305618.aspx

today when testing this evl again it worked fine. after letting it work for half an houre without problems I turn it off.

but when I tied to activate it again it didn't worked. the red led didnt turn on but when putting the bq50013B it doesnt respond.

what is the problem with this - do you know of a problem with this chip? or EVL? we have a PCB design ready for manufacuring with this component integrated but we afraid that there is somthing wrong with this chip.

please tell me what can be the problem.

thanks in advanced.