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Overvoltage Protection in Power Supplies
Application Note
Introduction Overvoltage Crowbar
Overvoltage (OVP) is an important
security feature in power supplies. An operator error or a component failure in the regulating feedback loop can drive
By using this feature, we can protect a power supply's output voltage to many times its preset value. The function of the
the device under test (DUT) from a crowbar circuit is to protect the load against this possibility. The circuit ensures
higher voltage than the DUT was that the power supply voltage across the load will never exceed a preset limit.
designed to handle. OVP is useful in This protection is valuable because of the extreme voltage sensitivity of today's
a variety of applications in electronics semiconductor devices.
manufacturing and the educational
market. The |
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