Isolierter Led-Wandler

Details

Veröffentlichungs-Nr.

EP4380316

Aktenzeichen

EP22210722

Anmeldetag

1. Dezember 2022

Veröffentlichung

26. November 2025

Erteilung

26. November 2025

Rechtsraum

EP

IPC

H05B45/382H05B45/385H02M3/335

Abstract

Disclosed is an isolated LED converter (1), comprising a main transformer (111; 121), a primary-side current sensing circuit (112), a secondary-side current sensing circuit (13), and a primary-side control circuit (14). The main transformer (111; 121) comprises inductively coupled windings (111; 121), being arranged on a primary side (11) and on a secondary side (12) of the converter (1), respectively. The primary-side current sensing circuit (112) is arranged in series to the primary-side winding (111), and is configured to sense a signal (113) indicating a current (114, I<prim>) through the primary-side winding (111). The secondary-side current sensing circuit (13) is arranged in parallel to the secondary-side winding (121), and is configured to sense a signal (131, I<SNS>) indicating a current (123) through a load (3) of the converter (1). The primary-side control circuit (14) is configured to sample and hold the signal (131, I<SNS>) indicating the current (123) through the load (3) during a sample-and-hold period (1421) in accordance with a zero-crossing, ZX (1141), of the signal (113) indicating the current (114, I<prim>) through the primary-side winding (111). This assures a correct sampling in a plateau phase of the signal (131, I<SNS>) indicating a current (123) through the load (3).

Anmelder

Firma

Tridonic GmbH & Co. KG

Land

🇦🇹 Österreich

Fachgebiete