| 摘要 |
<p>An LED driver circuit 1 has a rectifier 3 to rectify AC mains 2 to provide a DC output. A waveform generator 5 is driven by the rectifier to create a low duty cycle waveform. An air cored choke 7 is provided in series with a switch 5A, such as a MOSFET, driven by the generator output and LEDs X are connected in series with the choke output. In use the time between pulses from the generator is such as to allow the choke to fully decay between generator pulses.</p> |
