Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
Erik Malund
08/11/05 06:54
Modified:
  08/11/05 06:58

Read: 1013 times
Mt Airy, Nc
USA


 
#99193 - the constant current circuit can not be
Responding to: Jan Waclawek's previous message
the current regulation input, does it specifically require a resistor or a current source would do?
the constant current circuit can not be dynamically controlled, the dynamic current control is by pulses. To obtain "perfect white" there will be separate resistors for R, G and B constant current so that identical control of the 3 colors will produce white regardless of what currents the LED require for the 3 to obtain balance.

To avoid confusion: the "constant" current is not "constant" ... how do I say this ... it refer to a constant current circuit that is on/off controlled by pulse.

Erik

List of 11 messages in thread
TopicAuthorDate
soliciting input for LED chip      Erik Malund      08/10/05 13:29      
   Application      Ian Bell      08/10/05 16:47      
      spi      Jan Waclawek      08/11/05 00:27      
         the constant current circuit can not be      Erik Malund      08/11/05 06:54      
            Switch mode ?      Steve M. Taylor      08/11/05 11:12      
               Ok, let me try      Erik Malund      08/11/05 11:59      
                  Photodiode      Steve M. Taylor      08/11/05 12:47      
                     nah      Erik Malund      08/11/05 13:56      
                        resistor and current      Jan Waclawek      08/11/05 15:04      
                           words      Erik Malund      08/11/05 15:32      
      I am and I will      Erik Malund      08/11/05 06:49      

Back to Subject List