Multi-lead protected power device having current and boot-strap

Details Multi-lead protected power device having current and boot-strap Multi-lead protected power device having current and boot-strap

1993-07-19

1995-05-23

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Voltage regulator protective circuits

361 93, H02H 900

Patent

active

054186749

ABSTRACT:
A multi-leaded protected power device having a boot-strap input has been provided. The power device includes a current controlled, boot-strap driven control die (20) for use with a power transistor (25). The control die includes an under voltage lock-out circuit (46) which inhibits drive to the power transistor until the input signals exceed a predetermined threshold level. Moreover, the control die includes a noise immunity enhancement circuit (56) for providing an excess reverse bias across an output SCR (58) for preventing false triggering of the output SCR. The power device further includes a status output lead (204) for indicating when a voltage occurring across the power transistor has exceeded a predetermined threshold, and a current output lead (220) for providing a current that is proportional to a current flowing through the power transistor.

REFERENCES:
patent: 4408136 (1983-10-01), Kirsch
patent: 5047662 (1991-09-01), Edwards

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