US 12,218,653 B2
Control driver circuit and method for power transistor
Iman Abdali Mashhadi, Kanata (CA)
Assigned to Infineon Technologies Canada Inc., Ottawa (CA)
Filed by Infineon Technologies Canada Inc., Ottawa (CA)
Filed on Mar. 31, 2023, as Appl. No. 18/194,240.
Prior Publication US 2024/0333275 A1, Oct. 3, 2024
Int. Cl. H03K 17/0412 (2006.01); H03K 17/16 (2006.01)
CPC H03K 17/04123 (2013.01) [H03K 17/162 (2013.01); H03K 2217/0081 (2013.01)] 14 Claims
OG exemplary drawing
 
14. A method for driving an on-off state of a power transistor so as to more quickly turn the power transistor off than on, the method comprising:
turning on a switching transistor coupled between a first voltage supply node and an output node, the output node being coupled to a control node of the power transistor, the turning on causing a current to be induced within an inductive element that is coupled between the switching transistor and a second voltage supply node, the turning on also causing a voltage from the first voltage supply to be provided to the control node of the power transistor to thereby turn on the power transistor;
turning off the switching transistor, the turning off causing the induced current to be drawn from the output node to thereby turn the power transistor off; and
clamping a control voltage present on the control node to prevent the control voltage from dropping below a threshold that is below a second voltage provided by the second voltage supply node.