Abstract: In the parallel operation of power supply units, a high line ripple current may be observed in output when the power supply units (PSUs) are supplied with different inputs. For example, a high line ripple current may be observed when PSUs were supplied with different line frequency inputs and/or when PSUs were supplied with different phase angle input lines. A low pass filter is in a control loop which is capable of filtering the line frequency to get an average current reference signal. The average current reference signal is compared with the real time output current to generate an error signal. This error signal is fed back to a voltage control loop to adjust the output in order to compensate the line ripple.

Abstract: In the parallel operation of power supply units, a high line ripple current may be observed in output when the power supply units (PSUs) are supplied with different inputs. For example, a high line ripple current may be observed when PSUs were supplied with different line frequency inputs and/or when PSUs were supplied with different phase angle input lines. A low pass filter is in a control loop which is capable of filtering the line frequency to get an average current reference signal. The average current reference signal is compared with the real time output current to generate an error signal. This error signal is fed back to a voltage control loop to adjust the output in order to compensate the line ripple.

Abstract: A switching power converter includes a power circuit and a control circuit for receiving an analog signal representing a parameter of the power circuit. The control circuit includes an ADC for converting the analog signal into a digital signal, and a switch driver for generating a control signal for controlling a switch in the power circuit over multiple switching cycles. The control circuit is configured to adaptively determine a trigger point for activating the ADC within a switching cycle to sample the analog signal, and activate the ADC at the determined trigger point so a control parameter generated based on the digital signal is provided to the switch driver a minimal period of time before the next switching cycle begins. The adaptively determined trigger point optimizes phrase margin loss and bandwidth in the control circuit. Other example switching power converters and control circuits are also disclosed.

Abstract: According to some aspects of the present disclosure, example interleaved power supplies and corresponding control methods are disclosed. Example interleaved power supplies include an input terminal, an output terminal, and a first phase circuit coupled between the input terminal and the output terminal. The first phase circuit includes a first inductor and a first switch. The power supply also includes a second phase circuit coupled between the input terminal and the output terminal. The second phase circuit includes a second inductor and a second switch. The power supply further includes at least one current sensor, and a controller operable to control the first phase circuit and the second phase circuit in an interleaved mode when the sensed output current is below a current threshold and to control the first phase circuit and the second phase circuit in an in-phase mode when the output current is above the current threshold.

Abstract: According to some aspects of the present disclosure, example interleaved power supplies and corresponding control methods are disclosed. Example interleaved power supplies include an input terminal, an output terminal, and a first phase circuit coupled between the input terminal and the output terminal. The first phase circuit includes a first inductor and a first switch. The power supply also includes a second phase circuit coupled between the input terminal and the output terminal. The second phase circuit includes a second inductor and a second switch. The power supply further includes at least one current sensor, and a controller operable to control the first phase circuit and the second phase circuit in an interleaved mode when the sensed output current is below a current threshold and to control the first phase circuit and the second phase circuit in an in-phase mode when the output current is above the current threshold.