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Main => General Discussion Board. => Topic started by: kurt-olsson on May 04, 2021, 01:50:22 AM
My first try was to use mosfets to control my 5V backlight.
Almost All mosfets are from 5V and higher voltages. I need 0-5V but cant find any. Also, these units run really hot even with heatsink. And also there is a sagnific voltage drop (~8V gives 5V with D4184 Mosfet).
I can use 12V hardware dimmer i guess but the dimming level will be bad. Almost all dimming the first 5% of knob position and 100% the rest.
I allready have lots of 5V PSU for backlight and if using real aircraft dimmer i need 28V units.
Any tip here? :) i am stuck! Haha
Please post your schematic, and explain how everything is connected. And please state clearly what you are trying to achieve.
I am using a cheap Chinese MOSFET module to dim an LED lighting strip at home. It is 24Vdc at around 30W. The MOSFET is driven by a 3.3V PWM signal. The module barely gets warm.
Sorry again for not posting schematic. Its impossible to help without it.
Murphys law!
Either i shortened the first one or bad from the factory.
I tried another one and it worked great!!!
No voltage drop worth mentioning and i pull about 7Amps without heatsink.
I can highly recommend the D4184 right now on initial testing.