Voltage protection

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04:28:36

Step Down (Buck) Regulator Voltage Spike Protection 

Step down regulators work with feedback.  For example if you set the output of LM2596 at 3.3V.  There will be +5V voltage at the output for a while (if the input voltage is more than 3.3V).  It may burn out some sensitive circuits working with 3.3V over time.  A 2.8 or 2.7V zener diode and a 3V relay (coil resistance must be minimum 60 or 45ohm) are required for the circuit to work.  It is a little difficult to find in the market.  If the input voltage is 3.3V, the LED turns on.  But if it is more than +3.3V, the LED turns off.

published 1 year ago

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