Gate Driver Circuit For High-Side Switch
AssigneeMicrochip Technology Incorporated
InventorSureshkumar Ramalingam
Life of this patent
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Abstract
A gate driver circuit for driving a high-side switch is disclosed. The gate driver circuit comprises a sample and level-shift circuit. The sample and level-shift circuit is connected to the high-side switch. The gate driver circuit further comprises a sampling capacitor. The sampling capacitor is configured to sample an output voltage of an at least one amplifier. The gate driver circuit additionally includes at least one voltage supply. The at least one voltage supply is connected to the at least one amplifier. The sampling capacitor is configured to charge a gate capacitance of the high-side switch, and the at least one amplifier is configured to limit a high-side switch output current.
Claims18
A gate driver circuit for driving a high-side switch, the gate driver circuit comprising:
- a sample and level-shift circuit, the sample and level-shift circuit connected to the high-side switch;
- a sampling capacitor, the sampling capacitor configured to sample an output voltage of an at least one amplifier;
- and
- at least one voltage supply, the at least one voltage supply connected to the at least one amplifier;
- wherein:
- the sampling capacitor is further configured to charge a gate capacitance of the high-side switch;
- and
- the at least one amplifier is configured to limit a high-side switch output current.
A method for driving a high-side switch, the method comprising:
- supplying at least one voltage to an at least one amplifier;
- limiting an output current of the high-side switch via an at least one amplifier;
- sampling an output voltage of the at least one amplifier with a sampling capacitor configured for the sampling of the output voltage;
- level-shifting the output voltage of the at least one amplifier;
- and
- charging a gate capacitance of the high-side switch using the sampling capacitor.
A circuit, comprising:
- a high-side switch;
- and
- a gate driver circuit for driving a high-side switch, the gate driver circuit comprising:
- a sample and level-shift circuit, the sample and level-shift circuit connected to the high-side switch;
- a sampling capacitor, the sampling capacitor configured to sample an output voltage of an at least one amplifier;
- and
- at least one voltage supply, the at least one voltage supply connected to the at least one amplifier;
- wherein:
- the sampling capacitor is further configured to charge a gate capacitance of the high-side switch;
- and
- the at least one amplifier is configured to limit a high-side switch output current.
Dependencies are inferred from the claim text.