Steuervorrichtung für einen Resonanzwandler

Details

Veröffentlichungs-Nr.

EP2445098

Aktenzeichen

EP11186057

Anmeldetag

21. Oktober 2011

Veröffentlichung

7. August 2019

Erteilung

7. August 2019

Rechtsraum

EP

IPC

H02M3/337

Abstract

A control device (30) is described of a switching circuit (Q1, Q2) of a resonant converter (1) having an output direct current (Iout); said switching circuit (Q1, Q2) comprising at least a half-bridge of at least a first (Q1) and a second (Q2) transistor connected between an input voltage (Vin) and a reference voltage (GND). The half-bridge is adapted to generate a periodic square-wave voltage for driving the resonant circuit (300) of said resonant circuit and the periodic square-wave voltage oscillates between a high voltage corresponding to the input voltage and a low voltage corresponding to the reference voltage. Said control device (30) comprises generating means (6) adapted to generate a periodic square-wave signal (Vpwm) for driving the half-bridge. Said control device (30) comprises measuring means (200) adapted to measure the phase-shifting (¦, V ¦ ) between said periodic square-wave signal (Vpwm) generated by the generating means (6) and the current (Is) flowing through the resonant circuit, and adapted to control the turning off of the half-bridge when the phase-shifting exceeds a first phase-shifting value (Vth, ¦ th ). ( Fig. 2 )

Anmelder

Firma

STMicroelectronics Srl

Land

🇮🇹 Italien

Fachgebiete