Control circuit for a semiconductor switch

Details Control circuit for a semiconductor switch Control circuit for a semiconductor switch

1992-12-09

1994-04-05

Beha, Jr., William H.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

307270, 307570, 363131, H02M 108

Patent

active

053010850

ABSTRACT:
The invention relates to a semiconductor switch control circuit comprising a timing logic unit (1), a first and a second driver (2, 3) controlled by the timing logic unit, a first and a second transformer (T1, T2), to which the first and the second driver (2, 3), respectively, apply an unmodulated ac voltage signal (A, B) for bringing the semiconductor switch into a conducting and non-conducting state, respectively, and the secondary windings of which are connected at the opposite ends to a reference potential (RP); a first and a second rectifier (4, 5) for rectifying dc voltages (V+, V-) of opposite polarity from a voltage (A, B) acting across the secondary windings of the transformers; a first and a second driver (10, 11) for maintaining the semiconductor switch (12) in a conducting and non-conducting state, respectively; and capacitor units (8, 9) for storing the turn-on and turn-off energy of the semiconductor switch, respectively.

REFERENCES:
patent: 4748532 (1988-05-01), Commander et al.
patent: 5019719 (1991-05-01), King
patent: 5055721 (1991-10-01), Majumdar et al.
Unique Chip Pair Simplfies Isolated High Side Switch Drive; O'Connor; Unitrode Integrated Circuits; Appl'n Note U-127; p. 118.

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