Isolated uni-polar transistor gate drive
First Claim
1. A transistor gate drive comprising:
- a first input configured to be coupled to a DC voltage source;
a second input configured to receive a control signal;
a third input configured to couple to a ground connection;
a transformer having a primary winding and at least one secondary winding, the primary winding having a first end and a second end;
a first switch having a control input and configured to couple the first input to the first end of the primary winding in response to receipt of the control signal having a first level, and to decouple the first input from the first end of the primary winding in response to the receipt of the control signal having a second level;
a second switch having a control input and configured to couple the second end of the primary winding to the third input in response to receipt of the control signal having the first level, and to decouple the second end of the primary winding from the third input in response to the receipt of the control signal having the second level;
a Pulse Width Modulation (PWM) controller coupled to the first switch and the second switch and configured to generate the control signal;
a first diode coupled between the first switch and the first end of the primary winding and further coupled to the third input; and
a second diode coupled to the first input and further coupled between the second switch and the second end of the primary winding.
3 Assignments
0 Petitions
Accused Products
Abstract
According to one aspect, a transistor gate drive comprises a first input configured to be coupled to a DC voltage source, a second input configured to receive a control signal, a third input configured to couple to a ground connection, a transformer, a first switch configured to couple the first input to a first end of a primary winding of the transformer in response to receipt of the control signal, and to decouple the first input from the first end of the primary winding in response to the receipt of the control signal, a second switch configured to couple a second end of the primary winding to the third input in response to receipt of the control signal, and to decouple the second end of the primary winding from the third input in response to the receipt of the control signal.
22 Citations
16 Claims
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1. A transistor gate drive comprising:
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a first input configured to be coupled to a DC voltage source; a second input configured to receive a control signal; a third input configured to couple to a ground connection; a transformer having a primary winding and at least one secondary winding, the primary winding having a first end and a second end; a first switch having a control input and configured to couple the first input to the first end of the primary winding in response to receipt of the control signal having a first level, and to decouple the first input from the first end of the primary winding in response to the receipt of the control signal having a second level; a second switch having a control input and configured to couple the second end of the primary winding to the third input in response to receipt of the control signal having the first level, and to decouple the second end of the primary winding from the third input in response to the receipt of the control signal having the second level; a Pulse Width Modulation (PWM) controller coupled to the first switch and the second switch and configured to generate the control signal; a first diode coupled between the first switch and the first end of the primary winding and further coupled to the third input; and a second diode coupled to the first input and further coupled between the second switch and the second end of the primary winding. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of operating a transistor gate drive circuit, the method comprising:
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receiving a DC input voltage at a first input of the transistor gate drive circuit; receiving, in a turn-on mode, a control signal at a second input of the transistor gate drive circuit from a Pulse Width Modulation (PWM) controller, the control signal having a first level and a duty cycle; coupling, responsive to receipt of the control signal having the first level, the first input to a first end of a primary winding of a transformer; coupling, responsive to receipt of the control signal having the first level, a second end of the primary winding of the transformer to a ground connection; receiving, in a turn-off mode, the control signal at the second input of the transistor gate drive circuit, the control signal having a second level; and discharging, in response to the receipt of the control signal having the second level, the transformer. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification