| 摘要 |
-22- ABSTRACT A DC-DC converter for driving one or more LED (38), which converter comprises an integrated circuit (12) having a switch mode power circuit (24) and a 5 temperature sensing circuit (40) for providing an output indicating a temperature of said integrated circuit (12), the arrangement being such that, in use, said integrated circuit consumes power, some ofwhich power is dissipated in said integrated circuit as heat causing a rise in said internal temperature, and wherein a change in said output from said temperature sensing circuit (40) is used by said integrated circuit to 10 adjust said consumed power wherebysaidinternal temperature may be controlled |
