| 摘要 |
FIELD: electricity.SUBSTANCE: device contains an alternating current source, bridge rectifier of AC voltage into DC voltage, filter capacitor, stabilised DC voltage supply, FET-based power key, standard microcircuit chip of pulse-type regulator that controls the average value of current in the circuit of LEDs connected in-series and ripple-filter choke by means of FET-based power key, current limiting resistance, the first inverse current diode, controlled generator of width-modulated pulses. The converter circuit is equipped additionally with parallel LC-loop, the second inverse current diode and high-frequency capacitor; one output of this loop and cathode of the second inverse current diode are connected to anode of the circuit of LEDs connected in-series and cathode of the first inverse current diode while the other output of the parallel LC-loop is connected to the positive arm of the filter capacitor with high-frequency capacitor connected to it; anode of the second inverse current diode is connected to the negative arm of the filter capacitor.EFFECT: improved efficiency of the converter.1 dwg |
