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    • 4. 发明公开
    • SWITCHED CONVERTER FOR DRIVING LEDS OR FOR SUPPLYING FURTHER LED CONVERTER STAGE
    • EP3403472A1
    • 2018-11-21
    • EP16884358.9
    • 2016-01-13
    • Tridonic GmbH & Co. KG
    • LIN, Yaofeng
    • H05B37/02
    • A switched converter (1) for driving LEDs (16) or for supplying a further LED converter stage comprising a switch (2), a control unit (3) for controlling the switch (2), a sensing path with a shunt resistor (4) for sensing a voltage drop at the shunt resistor (4) representing the current through the switch (2) in the closed state of the switch (2), and a feedback path for feeding back a voltage signal to the control unit (3) that represents the voltage drop at the shunt resistor (4) of the sensing path, wherein the control unit (3) is configured to use the voltage signal, which is fed back on the feedback path, to control the clocking of the switch (2), and wherein the switched converter (1) further comprises a voltage scaling unit (5) in the feedback path for scaling the voltage signal, which is fed back on the feedback path, by at least two different scaling factors, or wherein the switched converter (1) further comprises for at least one phase of a mains voltage different mains connection terminals (15) for connecting with the corresponding phase and a voltage scaling unit (5) in the feedback path for scaling the voltage signal, which is fed back on the feedback path, by at least two different scaling factors depending on to which mains connection terminal (15) the phase is connected, or a voltage scaling unit in the sensing path for scaling the voltage drop at the shunt resistor unit by at least two different scaling factors depending on to which mains connection terminal (15) the phase is connected.