Patent ID: 11876453
Assignee: RICHTEK TECHNOLOGY CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A driver circuit of a switching converter circuit, comprising:
a high side driver, which generates a high side driving signal according to a PWM signal when the high side driver is enabled by a high side enable signal;
a low side driver, which generates a low side driving signal according to the PWM signal when the low side driver is enabled by a low side enable signal; and
a dead time control circuit, which generates a dead time signal according to an output current of an output power, to adaptively delay the low side driving signal or a signal which is in-phase with the low side driving signal, and/or to adaptively delay the high side driving signal or a signal which is in-phase with the high side driving signal, so as to adaptively control a dead time;
wherein the high side MOSFET and the low side MOSFET switch a terminal of an inductor between a first voltage and a second voltage, to convert an input power to the output power;
wherein the dead time is a period when the high side MOSFET and the low side MOSFET are both nonconductive;
wherein the dead time control circuit includes a sensor MOSFET having an N-type conductivity type, wherein a gate of the sensor MOSFET is coupled to a gate of the high side MOSFET or a gate of the low side MOSFET, wherein the sensor MOSFET generates the dead time signal at a sensor resistor according to a high side current flowing through the high side MOSFET or a low side current flowing through the low side MOSFET, wherein the sensor resistor is coupled to the sensor MOSFET in series.