| 摘要 |
<p>The present invention relates to a power integrated circuit for LED lighting. According to one embodiment of the present invention, the power integrated circuit for LED lighting includes a rectifying part which outputs DC power; a DC/ DC convertor which outputs and converts the level of DC power outputted from the rectifying part; LED groups which are connected in series to each other, LED drivers which control current which flows through the connected LED groups; switching devices which are short or open according to a switching control signal; and a PWM control part. [Reference numerals] (101) Rectifying part; (102) Zero phase detector; (103) Output voltage detector; (104) PWM control unit; (106) Voltage control clock generator; (107) Current control clock generator; (108) Variable control clock generator; (109) Color rendition LED driver; (110) External communication unit; (112) DC/DC convertor; (114) Color rendition LED; (115-1) LED1 driver; (115-2) LED2 driver; (115-3) LED3 driver; (115-4) LED4 driver; (116-1) Switching device 1; (116-2) Switching device 2; (116-3) Switching device 3; (130) Illuminance detector; (140) Temperature detector</p> |
