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Return to BlogSeries Protection Against High Voltage Transients
Posted Feb 07, 2012 at 1:40 pm
Figure 1
In many low-voltage applications, undesired voltage overshoots may occur at the input during the circuit operation. To avoid the harm of this overvoltage, we generally use parallel clamps such as fuses or other current limiting devices. The disadvantage of the parallel protection may be resetting or renewing the protector component. This circuit provides a series protection that turns off the power switch using a serially connected high voltage MOSFET ( IXFH26N50 – Q1) power switch and a fast overvoltage detector IC, MAX1614. The series connected rectifier diode D1 and the power switch is together capable of protecting the load up to +/- 500V of either polarity.
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2 years ago: This really happens and we can't stop stop the occurrence of transient voltages. It will be a waste of money buying expensive appliances if you can't protect it from over voltage.
2 years ago: every electronic projects and circuits should implement this to avoid damage on the components