E
Everest
- Jan 1, 1970
- 0
Hi everyone
Dealing with leds..I have few questions.I am trying to make matrix of
64 leds,common anode and darlington pair are used as current sinks for
individual leds. leds at 5v@25ma of current. I need to design a power
supply which will be enough to supply 64 leds i.e 25ma x 64 = 1.6A of
current + say 100ma for other circuitary on board .Now the leds are
addressed individually there is no row or column matrix.i.e the leds
are in parallel.
For how much output current should i design the power supply? 1.7A ?
or how much...and I will be using a resistor in series with led to
limit the current to 25ma for each led. and max vf for led is 3.4v.
As leds are in parallel 1.7A will get distributed among 64leds
+circuitrary( i.e led controllers)?
what will happen if i design for say 3A but the leds are limited to
25ma?I am not sure how this current distribution works.for parallel
leds.and what output current should i design my powersupply
circuitary?.can u give me your inputs plz .
Thanks
Everest
Dealing with leds..I have few questions.I am trying to make matrix of
64 leds,common anode and darlington pair are used as current sinks for
individual leds. leds at 5v@25ma of current. I need to design a power
supply which will be enough to supply 64 leds i.e 25ma x 64 = 1.6A of
current + say 100ma for other circuitary on board .Now the leds are
addressed individually there is no row or column matrix.i.e the leds
are in parallel.
For how much output current should i design the power supply? 1.7A ?
or how much...and I will be using a resistor in series with led to
limit the current to 25ma for each led. and max vf for led is 3.4v.
As leds are in parallel 1.7A will get distributed among 64leds
+circuitrary( i.e led controllers)?
what will happen if i design for say 3A but the leds are limited to
25ma?I am not sure how this current distribution works.for parallel
leds.and what output current should i design my powersupply
circuitary?.can u give me your inputs plz .
Thanks
Everest