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  1. J

    Why does the L5973D burn up if I turn R1 into 10K in this circuit?

    Hi, I want to ask for your help on my L5973D. I used to use L5973D to produce voltage of 3.3V/4.2V according to the typical circuit in the datasheet. The figures are same while the feedback resistance are different. The input is 24V DC. They worked well without anything wrong. (Test...
  2. J

    LM2575 regulators for my DC-DC converter

    To replace my overheating linear regulator DC-DC converter, I've designed this new board. This time I used a couple of switching 12V regulators .Here's the data sheet for reference: http://www.kynix.com/uploadfiles/pdf9675/LM2575-12BN.pdf I'm using two 1 amp regulators because my local supplier...
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