Transformer-coupled gate-drive power regulator system

摘要

A transformer-coupled gate-drive power regulator system is provided that includes a feedback stage that generates a PWM signal having a duty-cycle that is based on a magnitude of an output voltage in an output stage. A switch driver stage configured to provide each of a first control signal and a second control signal based on the PWM signal. A switching stage comprising a first transformer input stage, a second transformer input stage, and a control switch. The first transformer input stage activates the control switch via the first control signal while the second transformer input stage is deactivated, and the second transformer input stage activates the control switch via the second control signal while the first transformer input stage is deactivated. The control switch can be configured to provide current through an output inductor in the output stage to generate the output voltage in response to being activated.

主权项

1. A signal transformer-coupled gate-drive power regulator system comprising: a feedback stage configured to generate a pulse-width modulation (PWM) signal having a duty-cycle that is based on a magnitude of an output voltage in an output stage, the duty-cycle being defined by an on-time in a given period of the PWM signal; a switch driver stage configured to provide each of a first control signal and a second control signal based on the PWM signal; and a switching stage comprising a first signal transformer input stage, a second signal transformer input stage, and a control switch, the first signal transformer input stage being configured to activate the control switch via the first control signal while the second signal transformer input stage is deactivated, the second signal transformer input stage being configured to activate the control switch via the second control signal while the first signal transformer input stage is deactivated, and the control switch being configured to provide current through an output inductor in the output stage to generate the output voltage in response to being activated, wherein the switch driver stage is configured to provide the first control signal substantially concurrently with the on-time and to not provide the second control signal during a period of the PWM signal in response to the on-time being less than a duty-cycle threshold associated with the period of the PWM signal, and wherein the switch driver stage is configured to provide the first control signal during a first portion of the duration of the on-time and to provide the second control signal during a second portion of the duration of the on-time in response to the on-time being greater than the duty-cycle threshold.