The invention relates to a feed circuit for supplying power to LEDs from a primary DC voltage, wherein in the current circuit of at least one LED, a regulating transistor, a current sensor and a comparator are provided. The output end of the comparator is connected to the control input end of the regulating transistor, wherein the rated value of a current is input into the first input end of the comparator and the actual value of the current is input into the second input end of the comparator, wherein a capacitive pre-converter is arranged and converts the primary DC voltage into an intermediate circuit voltage according to the level of the intermediate circuit. The capacitive pre-converter has a longitudinal switch controlled by the PWM output end of a microcontroller, wherein the inputend of the microcontroller is supplied with a voltage value proportional to the primary DC voltage, and the microcontroller contains a lookup table indicative of a relationship between the supplied voltage value and the duty cycle of a signal at the PWM output end to convert the primary DC voltage to the intermediate circuit voltage, wherein an LED current circuit is at an intermediate circuit capacitor.


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    Titel :

    SPEISESCHALTUNG ZUR VERSORGUNG VON LEDS AUS EINER PRIMÄREN GLEICHSPANNUNG


    Weitere Titelangaben:

    POWER SUPPLY CIRCUIT FOR SUPPLYING LEDS FROM A PRIMARY DC VOLTAGE
    CIRCUIT D'ALIMENTATION DESTINÉ À ALIMENTER DES DEL À PARTIR D'UNE TENSION CONTINUE PRIMAIRE


    Beteiligte:
    WEBER EMANUEL (Autor:in) / KOLLER JAN (Autor:in)

    Erscheinungsdatum :

    2020-05-13


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Deutsch


    Klassifikation :

    IPC:    H05B ELECTRIC HEATING , Elektrische Heizung / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen