>Hi Technetters >I sent this a couple of weeks ago and had no responses, so after the >previous few days of technet I thought I'd try again. > >Previous message >Has anyone experienced any failures of TL783 series voltage regulators >manufactured by Texas Instruments? I have come across a number of devices >that have shut down unexpectedly. Failure analysis has indicated a higher >than normal contact resistance within one area of the internal circuit that >causes the spurious shutdown to occur. Once shut down, devices will remain >in this condition indefinitely, whether powered or not, at least until the >junction temperature is raised above 60-70F for a period of time. i.e. >failure occurs when the temperature drops. After recovery, the devices >appear to function correctly and do not shut down if the temperature is >reduced again. > >I have found it possible to keep failures in the "failed state" but only >with the use of cold conditions!!! > >NB Failures do occurabove the minimum specified operating temperature of >the >device. > >Any information on similar failures or faults would be appreciated. > Best Regards > >Ian Boyton > > >______________________________________________________ >Get Your Private, Free Email at http://www.hotmail.com > >################################################################ >TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c >################################################################ >To subscribe/unsubscribe, send a message to [log in to unmask] with following >text in the body: >To subscribe: SUBSCRIBE TechNet <your full name> >To unsubscribe: SIGNOFF TechNet >################################################################ >Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section >for additional information. >For technical support contact Hugo Scaramuzza at [log in to unmask] or >847-509-9700 ext.312 >################################################################ > > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################