| 摘要 |
An LED driver for powering an LED fixture is described, the LED driver comprising: - a switched mode power supply for providing a current to the LED fixture, and - a control unit for controlling a switch of the switched mode power supply; the control unit comprising an input terminal for receiving a set point representing a desired output characteristic of the LED fixture; the control unit further being adapted to - periodically determine an opening instance of said switch and a closing instance of said switch; - determining an average current estimate based on at least one measurement of the current to the LED fixture at at least one measurement instance determined on the basis of at least one of the opening instance or the closing instance of the switch. - applying the average current estimate as a feedback signal representing the average current for controlling the LED current. |
