05130883 is referenced by 23 patents and cites 10 patents.

In a circuit for overvoltage protection of a low voltage device (11) arranged to control a load (12) an energy storage capacitor (17) is connected to charge from supply (+V) while the device is controlled from a control circuit (100). During overvoltage, the controller is disconnected by switch means (15) and capacitor connected by switch means (16, 18) across the device to maintain it in an on state so that overvoltage device damage is prevented. The circuit is suited to transitory overvoltage conditions such as automotive load dump and to integration with the controlled device.

Title
Circuit for overvoltage protection
Application Number
7/484313
Publication Number
5130883
Application Date
February 26, 1990
Publication Date
July 14, 1992
Inventor
Arthur J Edwards
Hoffman Estates
IL, US
Agent
Phillip H Melamed
Assignee
Motorola
IL, US
IPC
H02H 9/02
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