Hello
I'm looking at a datasheet of some driver chips that I'm going to be recieving soon.
http://www.ti.com/lit/ds/symlink/tlc5947.pdf
24 channel 12 bit PWM drivers .
It says 30mA constant current SINK .
Does this mean that I have to connect the anode of the LED to 5v and the cathode to one of the pins ?
If so , then wouldn't this mean that the PWM values would be reversed
(4096 - myvalue) since when I output a high on the pin then now current flows and a low on the pin would be current flow. So I would have to reverse my PWM values? :/
Or does the chip already invert my data
Also question 2#
It says 30mA constant current . Does this mean that I can connect my LED bang on without a resistor or do I have to provide at least some dummy resistance to help the constant current driver do its job.
Info: The constant current is set for all pins by an external resistor.
Thanks in advance for the help
I'm looking at a datasheet of some driver chips that I'm going to be recieving soon.
http://www.ti.com/lit/ds/symlink/tlc5947.pdf
24 channel 12 bit PWM drivers .
It says 30mA constant current SINK .
Does this mean that I have to connect the anode of the LED to 5v and the cathode to one of the pins ?
If so , then wouldn't this mean that the PWM values would be reversed
(4096 - myvalue) since when I output a high on the pin then now current flows and a low on the pin would be current flow. So I would have to reverse my PWM values? :/
Or does the chip already invert my data
Also question 2#
It says 30mA constant current . Does this mean that I can connect my LED bang on without a resistor or do I have to provide at least some dummy resistance to help the constant current driver do its job.
Info: The constant current is set for all pins by an external resistor.
Thanks in advance for the help