H - Electricity – 02 – M
Patent
H - Electricity
02
M
H02M 7/217 (2006.01) H02M 3/158 (2006.01) H03K 17/0814 (2006.01)
Patent
CA 2136476
A switching boost type voltage regulator includes a resonant snubber network connected in parallel with its FET power switch. The snubber includes a FET auxiliary switch that is connected and turned on in order to reduce the voltage across the FET power switch to a zero level at its turn-on transition. A driver circuit, driven by a voltage regulating pulse width modulation (PWM) pulse, initially turns on the FET auxiliary switch to reduce a voltage across the FET power switch and then turns on the FET power switch when the voltage across drops below a threshold level. The FET auxiliary switch is turned off when the FET power switch is turned on. A latch circuit insures the complimentary states of these two switches. The snubber circuit is disabled a near to zero voltage regardless of line and load levels and hence the power dissipation in the snubber is significantly reduced.
Garcia Richard Ralph
Zaveri Pradhuman S.
American Telephone And Telegraph Company
Kirby Eades Gale Baker
LandOfFree
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