System and method of driving a switch circuit
AssigneeDialog Semiconductor (UK) Limited
InventorsDer Ju Hung, Yuan Wen Hsiao, Chi-Chia Huang
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Abstract
A sequential driving method for driving a switch circuit of a power converter is presented. The method has the steps of driving a switch circuit which contains a power switch, defining a driving sequence; and applying sequentially an electrical parameter to the power switch, based on the driving sequence. Defining a driving sequence includes defining a plurality of different driving levels associated with the electrical parameter and defining a plurality of time windows within a switching time period. Each time window is associated with a driving level among the plurality of driving levels.
Claims13
A method of driving a switch circuit comprising a first power switch coupled to a second power switch, and a driver coupled to the switch circuit;
- the method comprising the steps of:
- defining at least one driving sequence;
- applying sequentially an electrical parameter to at least one of the first power switch and the second power switch, based on the at least one driving sequence;
- and
- providing the driver with a first set of electronic circuits comprising a plurality of buffers, each buffer of the plurality of buffers being switchable between a first state wherein said each buffer has a first impedance and a second state wherein said each buffer has a second impedance, the first impedance being larger than the second impedance;
- wherein the driver comprises a first controller coupled to the first set of electronic circuits, wherein the first controller is adapted to switch at least one buffer of the plurality of buffers between the first state and the second state based on the at least one driving sequence;
- wherein said each buffer comprises an output, and wherein the outputs of the buffers are connected to each other;
- wherein the at least one driving sequence is adjustable and comprises a plurality of adjustable driving levels, and a plurality of adjustable time windows, each time window of the plurality of adjustable time windows being associated with a driving level among the plurality of adjustable driving levels;
- wherein the first controller comprises a first circuit for setting the plurality of adjustable time windows and a second circuit for setting the plurality of adjustable driving levels;
- and
- wherein the driver further comprises a buffer control unit coupled to the first circuit and to the second circuit;
- wherein the buffer control unit is adapted to receive timing information from the first circuit and driving level information from the second circuit and to generate a control signal to control the output of said each buffer of the plurality of buffers.
A driver for driving a switch circuit comprising a power switch, the driver being adapted to apply sequentially an electrical parameter to the power switch, based on an adjustable driving sequence;
- the driver comprising:
- a first set of electronic circuits comprising a plurality of buffers, each buffer of the plurality of buffers being switchable between a first state wherein said each buffer has a first impedance and a second state wherein said each buffer has a second impedance, the first impedance being larger than the second impedance;
- and
- a first controller coupled to the first set of electronic circuits, wherein the first controller is adapted to switch at least one buffer of the plurality of buffers between the first state and the second state based on the adjustable driving sequence;
- wherein said each buffer comprises an output, and wherein the outputs of the buffers are connected to each other;
- wherein the adjustable driving sequence comprises a plurality of adjustable driving levels, and a plurality of adjustable time windows, each time window of the plurality of adjustable time windows being associated with a driving level among the plurality of adjustable driving levels;
- wherein the first controller comprises a first circuit for setting the plurality of adjustable time windows and a second circuit for setting the plurality of adjustable driving levels;
- the driver further comprising a buffer control unit coupled to the first circuit and to the second circuit;
- wherein the buffer control unit is adapted to receive timing information from the first circuit and driving level information from the second circuit and to generate a control signal to control the output of said each buffer of the plurality of buffers.
A switching converter, comprising:
- a switch circuit comprising a first power switch coupled to a second power switch, and
- a driver coupled to the switch circuit, the driver being adapted to apply sequentially an electrical parameter to at least one of the first power switch and the second power switch, based on at least one adjustable driving sequence;
- the driver comprising:
- a first set of electronic circuits comprising a plurality of buffers, each buffer of the plurality of buffers being switchable between a first state wherein said each buffer has a first impedance and a second state wherein said each buffer has a second impedance, the first impedance being larger than the second impedance;
- and
- a first controller coupled to the first set of electronic circuits, wherein the first controller is adapted to switch at least one buffer of the plurality of buffers between the first state and the second state based on the at least one adjustable driving sequence;
- wherein said each buffer comprises an output, and wherein the outputs of the buffers are connected to each other;
- wherein the at least one adjustable driving sequence comprises a plurality of adjustable driving levels, and a plurality of adjustable time windows, each time window of the plurality of adjustable time windows being associated with a driving level among the plurality of adjustable driving levels;
- wherein the first controller comprises a first circuit for setting the plurality of adjustable time windows and a second circuit for setting the plurality of adjustable driving levels;
- the driver further comprising a buffer control unit coupled to the first circuit and to the second circuit;
- wherein the buffer control unit is adapted to receive timing information from the first circuit and driving level information from the second circuit and to generate a control signal to control the output of said each buffer of the plurality of buffers.
Dependencies are inferred from the claim text.