hi
i am working on a smps in which i have used PIC micro-controller and for sensing of the output voltage i have used optocupler is there any one who can help me to find mathematical relation between the voltage on the collector of optocuppler and the voltage supplied to the LED via out put voltage .i have also used tl431 in this method which is a normal case as designer use in smps feed back control.i only need help in finding the relation so i can sense it using micro-controller.
i am working on a smps in which i have used PIC micro-controller and for sensing of the output voltage i have used optocupler is there any one who can help me to find mathematical relation between the voltage on the collector of optocuppler and the voltage supplied to the LED via out put voltage .i have also used tl431 in this method which is a normal case as designer use in smps feed back control.i only need help in finding the relation so i can sense it using micro-controller.