Current source having improved dimming device

Current source having improved dimming device

The invention relates to a dimmable, multi-channel voltage/current source (47) with several outputs (CH1, CH2) for connecting an electrical load (10, 20), which provides a regulated direct current (I1, I2) at every output (CH1, CH2). The voltage source (47) comprises, for every output (CH1, CH2), a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: GRUBER STEPHAN, MEYHOEFER GERD, FRANZKY RENE, BEYER WINFRIED
Format: Patent
Sprache:chi ; eng
Schlagworte:
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
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Beschreibung
Zusammenfassung:The invention relates to a dimmable, multi-channel voltage/current source (47) with several outputs (CH1, CH2) for connecting an electrical load (10, 20), which provides a regulated direct current (I1, I2) at every output (CH1, CH2). The voltage source (47) comprises, for every output (CH1, CH2), a first dimming device (3), with which part of the current (I1', I2'') flowing to the output (CH1, CH2) can be conducted to a reference potential (GND) and which in each case comprises a switch (17, 27) that is controlled by a first PWM signal, and a second dimming device (4) with a second switch (12, 22) that is arranged in series to the electrical load (10, 20) and which is controlled by a second PWM signal (open1, open2).