Do I simply supply ~14v to the Emitter, connect the output of the TLC5940 to the Base, and ground the LED from the Collector?
Also how would I best compensate if the power supply is 15v?
The output of the TLC5940 is only 5V, that is not enough to hold a PNP transistor off
2. If you intend to drive more than about 4 channels at once, insert a 1K resistor in series with the base of each TIP107. The resistor will dissipate 100mW of the 125mW, so the 5940 now dissipates only 25mW or so per pin.
I intend to drive all 16 channels at once, with 5A being more than required (I estimate most channels will need 2-4A). By inserting a 1k resistor in series with the base of each TIP107, will this not drastically lower the TIP107 output?
I didn't think I would ever have reason to contradict your advice
I would also put a resistor from the emitter to the base to ensure the transistor (or FET) is turned off.
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