COM-11452 run on 5 volts?

Components & Accessories LEDs
1

The datasheet for the LED is useless. Only information is

Voltage - Forward (Vf) (Typ) 4.5V”

Not sure if that is okay for USB 5 volts or not.

2

5 volts is probably OK but I’d stick a 25 to 100 ohm resistor in series with the LED just to be safe.

1 Like
3

You have to use a current-limiting resistor. Otherwise, it may get burnt if you keep it on for hours.

4

Hi John ( @John_G_Thompson ),

Please be aware that COM-11452 is not a regular LED. It has a built-in driver which cycles through the R-G-B colors.

The driver operating voltage is defined as 2.0V Min, 4.5V Typical, 5.0V Max. So you should be fine with 5.0V.

Adding a resistor may stop the LED from working, if it drops the voltage too much. 25 Ohms is probably OK, but 100 Ohms is probably too much (based on the quoted 50mA typical current draw). If green and blue appear dim, your resistor is too large.

I hope this helps,
Paul