| 摘要 |
<p>An apparatus for reducing DC ripples for LED lighting according to the present invention includes: a DC voltage converter (10) for outputting DC voltage (Vdc) by receiving AC voltage and converting the AC voltage into DC power; a transistor (Q) having an emitter connected with an outer terminal (OT), a base, and a collector connected with the DC voltage (Vdc); a capacitor (C) having one terminal connected with one terminal of the first resistor (R1) and the other terminal connected with a grounding voltage (Vs); a second resistor (R2) having one terminal connected with the base of the transistor (Q) and the other terminal connected with the one terminal of the first resistor (R1); a zener diode (ZD) having an anode and a cathode, the anode being connected with the base of the transistor (Q), the cathode being connected with the output terminal (OT); and a plurality of diodes (D1, D2, D3) connected with in series between the collector and the emitter of the transistor (Q) so that predetermined voltage is applied between the collector and the emitter of the transistor Q.</p> |
