SCR with a fuse that prevents latchup

Details SCR with a fuse that prevents latchup SCR with a fuse that prevents latchup

2006-08-16

2009-02-03

Leja, Ronald W (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit interruption by thermal sensing

Reexamination Certificate

active

07486494

ABSTRACT:
A chip which utilizes a silicon controlled rectifier (SCR) for ESD protection prevents a latchup condition from occurring when the SCR misfires and turns on during normal operation by utilizing a fuse in series with the SCR. The fuse allows the SCR to perform normally during an ESD event, but blows if the SCR misfires and attempts to pull a pin voltage down to the holding voltage.

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