1x 6 meter long RGB LED strip (4 pins: 12v, Red Ground, Green Ground and Blue Ground) Collectively consuming 7.2A of current.
TLC5947 RGB LED driver
I need to use the TLC5947 to variably control the brightness of the Red, Green and Blue channels of this one long 6 meter LED strip. Obviously I can't connect the grounds of the strip directly to the TLC channel because it can only sink 60mA of current. So I need to come up with some sort of way to use a mosfet instead. Have the 3x mosfets control the ground connections of the LED strips red, green and blue channels.
What can I use to do so? The TLC is a ground based PWM controller, meaning that instead of sending 0 - 5v, it opens and closes it's ground connection. Understandable but now with a high Current Consuming LED strip like this, I need to use a Mosfet and with a mosfet you usually send the 0 - 5 v to open and close the mosfet gate to various degrees. How can I use the ground pin of the TLC to open and close the mosfet?
Some things to note.
- I only have 3 channels remaining free on the TLC so that's all I can work with, no cascading another TLC stuff.
- I need to be able to use the PWM of the TLC (main reason why I need to use it) otherwise I would just use an Due without nothing else and just DigitalWrite pins on and off. But I need the PWM.