Current mode controlled power converter

摘要

A current mode controlled power converter controllable in a digitally processing current mode even during an on time. In the power converter, each control period based on a reference signal includes a slope calculation period in which a slope compensation signal for the control period is calculated by a slope compensation unit. During each slope calculation period, the slope compensation unit negates the slope compensation signal calculated previous to the control period including the slope calculation period, and a reset signal generation unit compares a current detection signal detected by a current detection unit with a current instruction set to an error signal generated by an error signal generation unit to generate a reset signal.

主权项

1. A current mode controlled power converter comprising:
a switching unit configured to convert an input voltage into a desired output voltage through a switching operation; a current detection unit configured to detect a current flowing through the switching unit; an input voltage detection unit configured to detect the input voltage; an output voltage detection unit configured to detect the output voltage; an error signal generation unit configured to generate an error signal on the basis of the output voltage detected by the output voltage detection unit and a voltage instruction value; a slope compensation unit configured to calculate and output a slope compensation signal on the basis of the current detection signal, the input voltage, and the output voltage; a reset signal generation unit configured to generate a reset signal on the basis of the current detection signal, the error signal, and the slope compensation signal; a reference signal generation unit configured to generate a reference signal having a predetermined period; and a drive unit configured to generate a drive signal on the basis of the reset signal and the reference signal to drive the switching unit, wherein each control period based on the reference signal includes a slope calculation period in which the slope compensation signal for the control period is calculated, and during each slope calculation period, the slope compensation unit negates the slope compensation signal calculated previous to the control period including the slope calculation period, and the reset signal generation unit compares the current detection signal with a current instruction set to the error signal to generate the reset signal.