Semiconductor device providing overvoltage and overcurrent protection for a line
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United States of America Patent
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-
Jun 18, 2002
Grant Date -
N/A
app pub date -
Nov 8, 1999
filing date -
Apr 19, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An integrated circuit (40) providing overvoltage and overcurrent protection to a line (16). The integrated circuit (40) is constructed to provide overvoltage protection when a voltage exceeding a specified magnitude is impressed across the cathode and anode terminals (64, 66), irrespective of the gate-cathode current. A gate terminal (72) is provided to trigger the overvoltage protection device into conduction when a gate current exceeding a predefined value is carried on the line (16). The gate-cathode structure of the integrated circuit (40) includes a semiconductor resistance (74) which functions to make the gate current required for turn on higher, thereby allowing the gate-cathode terminals (64, 72) of the integrated circuit (40) too be connected in series with the line (16) to be protected.
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