Circuit for driving two power mosfets in a half-bridge configura

Details Circuit for driving two power mosfets in a half-bridge configura Circuit for driving two power mosfets in a half-bridge configura

1992-06-04

1994-11-15

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

327390, 327427, H03K 1756

Patent

active

053651189

ABSTRACT:
A driver circuit for driving top and bottom power transistors stacked between two supply terminals is provided. The driver circuit includes shoot-through reduction means for monitoring the gate-to-source voltages of the two power transistors so as to inhibit the turning-ON of each power transistor until the gate-to-source voltage of the other power transistor has fallen to a voltage level indicative of the other transistor being OFF. Additionally, the driver circuit which can utilize a bootstrap capacitor for providing enhanced voltages to drive the top power transistor, also includes a bootstrap capacitor recharge means to monitor the output voltage of the circuit so as to inhibit the turning-ON of the top power transistor until the bootstrap capacitor has had sufficient time to recharge.

REFERENCES:
patent: 4527081 (1985-07-01), Stewart
patent: 4954729 (1990-09-01), Urai
patent: 5099138 (1992-03-01), Fukunaga
patent: 5214322 (1993-05-01), Neldorff et al.
"Si9975/Si9976 N-Channel Half-Bridge Driver," Advance Information Data Sheet published by Siliconix, Santa Clara, Calif., pp. 5-83, in 1990/1991 Power Products Data Book.
"Si9976DY N-Channel Half-Bridge Driver", Advance Information Data Sheet published by Siliconix, dated Feb. 14, 1992, Santa Clara, Calif., pp. 55-59.

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