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Glossary Term: Overvoltage Protection
Definition
Overvoltage Protector (OVP) refers to a circuit that protects downstream circuitry from damage due to excessive voltage. An OVP monitors the DC voltage coming from an external power source, such as an off-line power supply or a battery, and protects the rest of the connected circuitry using one of two methods: a crowbar clamp circuit or a series-connected switch.
The crowbar short-circuits or clamps the supply line to limit the voltage, possibly triggering other forms of protection such as a fuse. See Crowbar.
The series-connected switch uses a MOSFET or transistor connected as a switch in series with the supply line. During an overvoltage condition, the OVP circuit rapidly shuts off the MOSFET and disconnects the downstream circuit.
See: Protection and Isolation products.
Synonyms
Related Parts
- MAX6495 - 72V, Overvoltage-Protection Switches/Limiter Controllers with an External MOSFET
- MAX6496 - 72V, Overvoltage-Protection Switches/Limiter Controllers with an External MOSFET
- MAX6497 - 72V, Overvoltage-Protection Switches/Limiter Controllers with an External MOSFET
- MAX6498 - 72V, Overvoltage-Protection Switches/Limiter Controllers with an External MOSFET
- MAX6499 - 72V, Overvoltage-Protection Switches/Limiter Controllers with an External MOSFET
- MAX6397 - Overvoltage Protection Switch/Limiter Controllers Operate Up to 72V
- MAX6398 - Overvoltage Protection Switch/Limiter Controllers Operate Up to 72V
- MAX16010 - Ultra-Small, Overvoltage Protection/Detection Circuits
- MAX16011 - Ultra-Small, Overvoltage Protection/Detection Circuits
- MAX16012 - Ultra-Small, Overvoltage Protection/Detection Circuits
- MAX16013 - Ultra-Small, Overvoltage Protection/Detection Circuits
- MAX16014 - Ultra-Small, Overvoltage Protection/Detection Circuits
See Also
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