Viper 16 hangs up

bsmith · ‎2013-05-09

Posted on May 09, 2013 at 10:12

I put in a technical support request on this but no response.

I'm running a Viper16 in a simple non-isolated buck configuration as per the data sheet.

There is a spark ignitor on the board and sometimes when the spark occurs, the Viper16 shuts down. I can understand it might go into one of its overload conditions but it does not recover. Vdd sits at 12V, 0.25V on FB and 0V on LIM and COMP.

If I inject current into Vdd, the Viper16 starts again. Strange.

Has anyone had this sort of problem with the Viper16 or other Viper chips?

lgeoffroy · ‎2014-05-20

Posted on May 20, 2014 at 16:41

Hi, I have a similar problem with the Viper26HN,

We do Surge testing on the board and the viper stop working, the output is at 0.38V, FB+Comp at 0.1v, and VDD a 13.5V. I need too kill the main input voltage for 10-20sec for the viper to restart.

Any solution ?