Hi everyone,
I'm really a novice when it comes to this stuff, so I'm sure there are some gaps in my understanding. Please don't be afraid to tell me I've done this entire thing wrong!
Anyway, I'm using the TLC5940 (datasheet) as a 16-channel, current-sinking PWM multiplexor for my Arduino to independently control 10cm segments of my current-limited 12v RGB LED strips. (circuit of single strip)
I'm hoping to use an n-channel MOSFET in series with each channel of the TLC5940 to avoid overheating my 5940s. (circuit)
My questions are:
The TLC5940 has a current limiting resistor. To what current should I be limiting to? I want the smallest value possible to reduce heat to the 5940, right?
What do I need to set the pull-down resistor to?
I currently have some NTE2395s (datasheet), but I'm not opposed to buying new MOSFETs if that's what should be done.
Thanks for reading. Any help would be greatly appreciated.
I'm really a novice when it comes to this stuff, so I'm sure there are some gaps in my understanding. Please don't be afraid to tell me I've done this entire thing wrong!
Anyway, I'm using the TLC5940 (datasheet) as a 16-channel, current-sinking PWM multiplexor for my Arduino to independently control 10cm segments of my current-limited 12v RGB LED strips. (circuit of single strip)
I'm hoping to use an n-channel MOSFET in series with each channel of the TLC5940 to avoid overheating my 5940s. (circuit)
My questions are:
The TLC5940 has a current limiting resistor. To what current should I be limiting to? I want the smallest value possible to reduce heat to the 5940, right?
What do I need to set the pull-down resistor to?
I currently have some NTE2395s (datasheet), but I'm not opposed to buying new MOSFETs if that's what should be done.
Thanks for reading. Any help would be greatly appreciated.