T
Tim Simmons
- Jan 1, 1970
- 0
I need to make some hyperbright/superbright LEDs even brighter.
Under steady state conditions they draw about 20mA at 3.6v. I
understand that they can be pulsed at a higher voltage for additional
brightness without reducing their life expectancy. In fact, I have
heard that their life can be extended because the diode junction
actually runs cooler under pulsed conditions. Does anybody know the
optimum voltage, frequency and duty cycle to use?
I understand that white LEDs are really blue LEDs with a phosphor
coating on the inside of the bottle and these cannot be pulsed above
about 5kHz, because although the LED can flash much faster, the
phosphor cannot keep up and the LEDs change colour.
Can anybody offer any help?
Under steady state conditions they draw about 20mA at 3.6v. I
understand that they can be pulsed at a higher voltage for additional
brightness without reducing their life expectancy. In fact, I have
heard that their life can be extended because the diode junction
actually runs cooler under pulsed conditions. Does anybody know the
optimum voltage, frequency and duty cycle to use?
I understand that white LEDs are really blue LEDs with a phosphor
coating on the inside of the bottle and these cannot be pulsed above
about 5kHz, because although the LED can flash much faster, the
phosphor cannot keep up and the LEDs change colour.
Can anybody offer any help?