05086364 is referenced by 30 patents and cites 5 patents.

The voltage (U.sub.DS) on a power MOSFET (1) is compared with a voltage (U.sub.V) derived from the sum of the voltages of a Zener diode (3) and the threshold voltage (U.sub.T) of a second MOSFET (5) to detect a short circuit in a load (2) in series with the power MOSFET (1). When this total voltage is exceeded, the second MOSFET conducts. Its load current is then evaluated as the short circuit signal.

Title
Circuitry for detecting a short circuit of a load in series with an FET
Application Number
382524
Publication Number
5086364
Application Date
February 19, 1991
Publication Date
February 4, 1992
Inventor
Roland Weber
Munich
DE
Jenoe Tihanyi
Munich
DE
Rainald Sander
Munich
DE
Ludwig Leipold
Munich
DE
Assignee
Siemens Aktiengesellschaft
DE
IPC
H02H 3/20
View Original Source