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  1. SPK627

    PCB reliability and cost single vs double sided

    Thanks to everyone for your responses. What I've decided to do is to do two layouts - one single-sided and the other double-sided. That way we'll be able to see which, if either, of the layouts will work. If they both work, then I guess we'll just stick with the single-sided approach, but if...
  2. SPK627

    PCB reliability and cost single vs double sided

    Gunnar, I wish this were for a happy meal toy! This circuit is for a xenon strobe with a piezoelectric horn. The grounding problem is aggrevated by the discharge of the xenon flash tube. Basically this circuit is a DC/DC boost converter with a 16 kHz switching frequency. We don't have a...
  3. SPK627

    PCB reliability and cost single vs double sided

    I'm working on a new circuit board layout that has so far gone through 3 revisions and a fourth revision is required. The main problem with the layout has been due to ground trace placement. We are forced to use single sided layouts because of the cost, but I am trying to convince my boss that...
  4. SPK627

    switch contact ratings

    I have a switch that is rated for 125VAC, 0.3 A. My question is if I use it in a 70VAC, 35W circuit, producing a current of 0.5A, am I trouble?
  5. SPK627

    Schottky diode failure

    Sometimes they are dead shorts, other times they are near shorts, less than 20 ohms. We also have parts that appear to fail but measure normal (~0.2V) as a diode, but the reverse leakage current is through the roof. I would be surprised to have the cause of the failure be excessive current...
  6. SPK627

    Schottky diode failure

    I am having a problem with a 60V Schottky diode. We are having around a 1% failure rate of the diodes in production. This appears to be an early break-in type of failure, since we don't have any failures that show up during life testing. The failure mode is a short. We have not been able to...

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