A driving circuit includes a first differential amplifier, wherein the first differential amplifier includes: a delay adjustment circuit that generates a second differential signal by delaying a first differential signal in response to instantaneous voltage level of the first differential signal; a differential circuit that divides a source current into a first current and a second current in response to the second differential signal; and a first load resistor and a second load resistor that generate a positive phase component and a negative phase component of the differential output signal based on the first current and the second current, wherein a third differential amplifier operates in a non-saturated region when a voltage level of the first differential signal is in an input voltage range, and operates in a saturated region when the voltage level of the first differential signal is out of the input voltage range.

A driving circuit includes a first differential amplifier, wherein the first differential amplifier includes: a delay adjustment circuit that generates a second differential signal by delaying a first differential signal in response to instantaneous voltage level of the first differential signal; a differential circuit that divides a source current into a first current and a second current in response to the second differential signal; and a first load resistor and a second load resistor that generate a positive phase component and a negative phase component of the differential output signal based on the first current and the second current, wherein a third differential amplifier operates in a non-saturated region when a voltage level of the first differential signal is in an input voltage range, and operates in a saturated region when the voltage level of the first differential signal is out of the input voltage range.

A controller for a power converter comprising a drive circuit and an adaptive current limit generator. The drive circuit is coupled to receive a request signal representative of a power demand of an output of the power converter. The drive circuit is configured to generate a drive signal to control switching of a power switch in response to the request signal. The adaptive current limit generator configured to generate a current limit signal and the drive circuit is configured to turn off the power switch when a current sense signal reaches the current limit signal. The adaptive current limit generator is configured to vary an upper threshold of the current limit signal to a first value when a switching frequency is less than a frequency threshold and vary the upper threshold to a second value when the switching frequency is greater than the frequency threshold.

A controller for a power converter comprising a drive circuit and an adaptive current limit generator. The drive circuit is coupled to receive a request signal representative of a power demand of an output of the power converter. The drive circuit is configured to generate a drive signal to control switching of a power switch in response to the request signal. The adaptive current limit generator configured to generate a current limit signal and the drive circuit is configured to turn off the power switch when a current sense signal reaches the current limit signal. The adaptive current limit generator is configured to vary an upper threshold of the current limit signal to a first value when a switching frequency is less than a frequency threshold and vary the upper threshold to a second value when the switching frequency is greater than the frequency threshold.

A controller for a power converter comprising a drive circuit and an adaptive current limit generator. The drive circuit is coupled to receive a request signal representative of a power demand of an output of the power converter. The drive circuit is configured to generate a drive signal to control switching of a power switch in response to the request signal. The adaptive current limit generator configured to generate a current limit signal and the drive circuit is configured to turn off the power switch when a current sense signal reaches the current limit signal. The adaptive current limit generator is configured to vary an upper threshold of the current limit signal to a first value when a switching frequency is less than a frequency threshold and vary the upper threshold to a second value when the switching frequency is greater than the frequency threshold.

A controller for a power converter comprising a drive circuit and an adaptive current limit generator. The drive circuit is coupled to receive a request signal representative of a power demand of an output of the power converter. The drive circuit is configured to generate a drive signal to control switching of a power switch in response to the request signal. The adaptive current limit generator configured to generate a current limit signal and the drive circuit is configured to turn off the power switch when a current sense signal reaches the current limit signal. The adaptive current limit generator is configured to vary an upper threshold of the current limit signal to a first value when a switching frequency is less than a frequency threshold and vary the upper threshold to a second value when the switching frequency is greater than the frequency threshold.