Patent ID: 9653913
Date: 2017-05-16
CPC Classifications: H02H

Claim:
1. An overcurrent protection device integrated into a silicon substrate, comprising: an input terminal to receive an input current; an output terminal coupled to the input terminal; a current limiter circuit integrated into the silicon substrate and arranged between the input terminal and output terminal and comprising: wherein the series pass element comprises a main SCR, wherein the overcurrent protection device further comprises a silicon controlled switch (SCS) that is coupled to the main SCR and configured to trigger into an ON state that starves the main SCR of internal regenerative current when the sense voltage exceeds a predetermined sense voltage level, wherein the main SCR comprises an SCR anode and includes a gate current feed from the SCR anode, wherein as a supply voltage connected to the input terminal rises when a load is connected to the overcurrent protection device, gate current flows from an anode connected feed into the main SCR until internal regeneration turns the main SCR to a latched low resistance conduction state that places the series pass element in the pass state; and a drive transistor coupled to a cathode gate or anode gate of the SCR, the drive transistor configured to turn on the SCR at the cathode gate or anode gate, respectively.