Apparatus for PWM gate drive circuit
AssigneeFuturewei Technologies, Inc.
InventorsHeping Dai, Hengchun Mao, Zhihua Liu, Zhaozheng Hou
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Abstract
A converter comprises a high side switch, a low side switch connected in series with the high switch, a gate drive circuit comprising a first drive port coupled to a gate of the high side switch, a second drive port coupled to a gate of the low side switch, an SRE input port and a PWM input port coupled to a PWM controller, wherein the PWM controller is selected from the group consisting of a first PWM controller having two complementary PWM outputs, a second PWM controller having a tri-state PWM output and a third PWM controller having a single PWM output.
Claims20
A converter comprising:
- a high side switch;
- a low side switch connected in series with the high side switch;
- a gate drive circuit comprising:
- a first drive port coupled to a gate of the high side switch;
- a second drive port coupled to a gate of the low side switch;
- a control input port;
- and
- a PWM input port having an input interface suitable for a first PWM controller having two complementary PWM outputs, a second PWM controller having a single PWM output generating a tri-state PWM fed into the PWM input port and a third PWM controller having a single PWM output fed into the PWM input port and a control logic output fed into the control input port.
An apparatus comprising:
- a first gate drive port configured to generate a first gate drive signal;
- a second gate drive port configured to generate a second gate drive signal, wherein the second gate drive signal and the first gate drive signal are complementary during normal operation;
- a control input port;
- and
- a PWM input port having an input interface suitable for a first PWM controller having two complementary PWM outputs connected to the PWM input port and the control input port respectively, a second PWM controller having a single tri-state PWM output connected to the PWM input port and a third PWM controller having a single PWM output and a logic output connected to the PWM input port and the control input port respectively.
A method comprising:
- detecting a first signal at a PWM port and a second signal at a control port of a gate drive circuit, wherein the gate drive circuit includes an input interface suitable for a first PWM controller having two complementary PWM outputs connected to the PWM port and the control port respectively, a second PWM controller having a tri-state PWM output connected to the PWM port and a third PWM controller having a single PWM output and a logic output connected to the PWM port and the control port respectively;
- determining an operation mode of the gate drive circuit based upon the first signal and the second signal;
- and
- generating a first gate drive signal at a first gate drive port and a second gate drive signal at a second gate drive port based upon the first signal the second signal, wherein the first gate drive signal and the second gate drive signal are complementary signals.
Dependencies are inferred from the claim text.