/diy/ - Do It Yourself

>>1281979
>Maybe 5 cents apiece?

ah. good one. I don't write very well..

For those LEDs, I have this in mind: I bought some of those DC-DC step-up converters as seen in the upper circuit. I'm using one to power some LEDs as discussed here >>1281925

The problem is that the LED current drifts a lot, like if I set the voltage so that a string of 10 LEDs has a current of 14 mA, 20 minutes later it might be 12 mA.

If I modify the circuit as seen below, should it work as long as the resistor is sized to give a voltage of 1.25 volts at the desired LED current (the XL6003 feedback threshold is 1.25 volts)?

the chip: https://www.pollin.de/productdownloads/D351434D.PDF

In the chip function block, is OVP what limits the output to 60 volts? In the case where an LED fails open, the output will go to 60 V and stop, correct? The output capacitor is rated at 50 volts. What would you expect to happen if it were subjected to 60 volts for a few hours?