Steuerschaltung für Sperrwandler und Verfahren zur Steuerung eines Sperrwandlers

Details

Veröffentlichungs-Nr.

EP4761084

Anmeldetag

8. Dezember 2025

Veröffentlichung

17. Juni 2026

Rechtsraum

EP

IPC

H02M1/00, H02M3/335

Abstract

Embodiments of a control circuit for a flyback converter and a method for controlling a flyback converter are disclosed. In an embodiment, a control circuit includes an integrator circuit configured to output a ramp signal in response to an AC feedback signal from a primary side of a flyback converter, a threshold generator circuit configured to output a threshold voltage in response to the ramp signal, wherein the threshold voltage is generated as a function of a peak voltage of the ramp signal, a comparator circuit configured to compare the ramp signal to the threshold voltage and to output a sampling signal when the ramp signal drops below the threshold voltage, and a sample and hold circuit configured to sample the AC feedback signal in response to the sampling signal and to output a sample of the AC feedback signal that is used to control the flyback converter.

Anmelder

Firma

NXP USA, Inc.

Land

🇺🇸 USA