Tridonic Gmbh Co. Kg

Harald Netzer

Frank Lochmann

Deepak Makwana

Markus Mayrhofer

Patrick Marte

Hans Auer

Christian Nesensohn

Stefan Stark

Ludwig Erasmus De Clercq

Xinhai Li

Jagjitpati Shukla

Lukas Saccavini

Jakob Maldoner

Markus Schertler

Yaofeng Lin

Oliver Wynnyczenko

Clemens Kucera

Zongjie Wu

David Reimondez

Blazej Szyler

Sascha Gstir

A source circuit, a power supply and an electric system. The source circuit includes at least one voltage source supplied from a mains circuit and used to provide at least one voltage for at least one device and at least one switch respectively connected to the at least one voltage source and controlled to be turned on according to a voltage of the mains circuit and/or at a timing after the mains circuit being applied corresponding to the device.

Source circuit and power supply and electric system

The invention relates to a method () for operating an isolated primary side switched converter () for providing a voltage supply to an LED load (), wherein the converter comprises a galvanic isolation stage (), the method comprising the steps of:

Primary side switched converter for providing a voltage supply to an LED load

The invention relates to an isolated resonant primary side switched converter (), comprising a galvanic isolation stage (), an auxiliary winding (L-) on the primary side () of the isolation stage () which is magnetically coupled to at least one secondary side winding (L-, L-) of the isolation stage (), wherein the auxiliary winding (L-) is configured to detect a feedback signal as to a secondary side voltage, and a control unit () configured to sample the feedback signal, in each or every nswitching cycle, during a sampling period in which a current is flowing on the secondary side () of the isolation stage (), and to process the sampled signal for a feedback control of the secondary side voltage by controlling the switching operation of a primary side switch (M, M).

Isolated primary side switched converter

The invention relates to an isolated converter () for providing a current supply to an LED load, comprising: a galvanic isolation stage (); a sensing circuit () on a primary side of the isolation stage (), which is magnetically coupled to a secondary side of the isolation stage (); wherein the sensing circuit () is configured to receive a feedback signal that is proportional to a secondary side current; and a control unit () configured to determine an output current of the converter () based on the feedback signal; wherein at least one electrical characteristic of the sensing circuit () and/or the control unit () is adjustable to convert the feedback signal from a first ratio to a second ratio to the secondary side current.

Isolated converter with improved current sensing

The invention relates to an LLC stage for an LED driver (), comprising a half bridge or full-bridge circuit () comprising two switches (M, M), connected in series, a control circuitry (), such as e.g. a microcontroller or ASIC, for controlling switching operations of the switches (M, M), wherein the control circuitry () for switches is arranged to monitor the middle point voltage between the two switches (M, M) and enables the switch on of one of the switches (M, M) only if the middle point voltage meets defined criteria. The control circuitry () is designed to issue an error signal, if a dead time, during which both switches are non-conducting and resulting from the monitoring of the midpoint voltage, is greater than a preset threshold value.

LLC stage for LED drivers

A switched power converter () is arranged for supplying lighting means () as a load, having at least one (M, M) switch controlled by a control unit (),

Switched power converter system

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Dornbirn, Austria

Harald Netzer