×

Inverting buck-boost converter drive circuit and method

  • US 10,122,279 B2
  • Filed: 05/11/2017
  • Issued: 11/06/2018
  • Est. Priority Date: 10/24/2014
  • Status: Active Grant
First Claim
Patent Images

1. A circuit, comprising:

  • a power transistor having a drain terminal coupled to a input node and a source terminal coupled to an output node;

    a drive circuit having an input configured to receive a drive signal and an output configured to output a first control signal;

    a first capacitor having a first terminal coupled to receive the first control signal from the drive circuit and a second terminal configured to generate a first boosted control signal at a first intermediate node;

    a diode having an anode coupled to the input node and a cathode coupled to the first intermediate node;

    a circuit path configured to apply the first boosted control signal from the first intermediate node to a gate terminal of the power transistor;

    an inverter circuit configured to invert the first control signal and generate a second control signal;

    a second capacitor having a first terminal coupled to receive the second control signal from the inverter circuit and a second terminal configured to generate a second boosted control signal at a second intermediate node; and

    a first transistor having a gate terminal coupled to receive the second boosted control signal from the second intermediate node, a drain terminal directly connected to the gate of the power transistor and a source terminal directly connected to the source terminal of the power transistor.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×