RGBrainbow
New Member
Hi,
when multiplexing LEDs they are normally driven with a higher current to achieve same brightness as in normal operation.
1 LED: 1/1 nominal current for 1/1 time
2 LEDs: 2*nominal current for 1/2 time
3 LEDs: 3*nominal current for 1/3 time
.
.
.
Now the question:
How far can one go this way?
For example: how many 7-segment-digits can be multiplexed @ full brightness without toasting the LEDs?
What is the limiting factor? Overheating the LED-chip? Frying the bonding-wires?
best regards
joachim
when multiplexing LEDs they are normally driven with a higher current to achieve same brightness as in normal operation.
1 LED: 1/1 nominal current for 1/1 time
2 LEDs: 2*nominal current for 1/2 time
3 LEDs: 3*nominal current for 1/3 time
.
.
.
Now the question:
How far can one go this way?
For example: how many 7-segment-digits can be multiplexed @ full brightness without toasting the LEDs?
What is the limiting factor? Overheating the LED-chip? Frying the bonding-wires?
best regards
joachim