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US 2013/0181748 A1Published application
Method and apparatus for driving a voltage controlled power switch device
OwnerFranc Zajcinventor
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Abstract
A driving circuit for at least one voltage controlled power switch device comprises a driver signal generating circuit and a trigger signal generating circuit adapted to generate trigger signals for said voltage controlled power switch device (PT). The trigger signal generating circuit includes a first driving transistor, and at least one energy buffer component coupled between the trigger signal generating circuit and the control electrode of said power switch device (PT).
Claims17
A driving circuit for at least one voltage controlled power switch device comprising:
- a driver signal generating circuit configured to receive a pulsed signal and to generate
- a first driver signal in response to a rising edge of the pulsed signal
- a second driver signal in response to a falling edge of the pulsed signal;
- a trigger signal generating circuit configured to generate a trigger signal for said voltage controlled power switch device, and comprising a first driving transistor configured to be switched on by the first driver signal such that an on-voltage of the trigger signal is supplied to a control electrode of said power switch device, and comprising a second driving transistor configured to be switched on by the second driver signal such that an off-voltage of the trigger signal is supplied to the control electrode of said power switch device;
- and
- at least one energy buffer component coupled between the trigger signal generating circuit and the control electrode of said power switch device,
- said energy buffer component being adapted to store signal energy of the on-voltage trigger signal until a threshold voltage of said power switch device is reached and adapted to release the stored signal energy to said control electrode of said power switch device when said threshold voltage of said power switch device has been reached, wherein the released energy stored in said energy buffer component provides a voltage oversway on the control electrode of said power switch device which accelerates the switching of said power switch device.
4 more elements
A method for driving at least one voltage controlled power switch device comprising the steps of:
- generating a first driver signal in response to a rising edge of a pulsed signal and a second driver signal in response to a falling edge of the pulsed signal,
- generating a trigger signal for a control electrode of said power switch device,
- wherein an on-voltage trigger signal is generated in response to an active first driver signal,
- wherein an off-voltage trigger signal is generated in response to an active second driver signal;
- and
- storing signal energy of said trigger signal until a threshold voltage of said power switch device is reached and releasing the stored signal energy to the control electrode of said power switch device when and after the threshold voltage has been reached,
- wherein the released energy provides a voltage oversway which accelerates the switching of said power switch device.
4 more elements
Dependencies are inferred from the claim text.