access icon free Small-signal model for a flyback converter with peak current mode control

This study presents a systematic block diagram for a peak current mode controlled flyback converter to investigate its dynamic properties at high switching frequencies. At low frequencies, the proposed block diagram approximates the converter current loop to a current source. To verify the proposed model, a flyback circuit was tested. The control-to-output transfer function obtained from derived small-signal model shows good agreement in frequency response between the derived result and the experimental one spanning from the DC to the approaching half-switching frequency.

Inspec keywords: frequency response; electric current control; switching convertors; switched mode power supplies

Other keywords: small-signal model; systematic block diagram; flyback converter; peak current mode control; switching mode power supply; current source; SMPS circuits; converter current loop; control-to-output transfer function; frequency response; half-switching frequency; flyback circuit

Subjects: Current control; Power electronics, supply and supervisory circuits

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