Hello to all E-Gurus,
Does thia approach of having a current limiting resistor, work even for high power LEDs like a 1W or 3W LED?
I ask this because I have tried this in the past with power leds and after some hours od operation, the LED blows off as if it were supplied with too much power (or the LEDs just drew a lot of power). Not to mention, even the power supply takes a hit.
Another thing is that if it were as simple as having a current limiting resiator to drive LEDs, then why comw up with CC/CV LED drivers?
I even tried making a simple current limiter using bias/voltage control to a power BJT or power MOSFET for controlling current to power LEDs. Even with that, the LEDs die sooner than their stipulated life.
I think this approach works for small LEDs with very low power leds but the dynamics change completely when we use high power LEDs.
Thoughts?
Regards,
Deepak
Does thia approach of having a current limiting resistor, work even for high power LEDs like a 1W or 3W LED?
I ask this because I have tried this in the past with power leds and after some hours od operation, the LED blows off as if it were supplied with too much power (or the LEDs just drew a lot of power). Not to mention, even the power supply takes a hit.
Another thing is that if it were as simple as having a current limiting resiator to drive LEDs, then why comw up with CC/CV LED drivers?
I even tried making a simple current limiter using bias/voltage control to a power BJT or power MOSFET for controlling current to power LEDs. Even with that, the LEDs die sooner than their stipulated life.
I think this approach works for small LEDs with very low power leds but the dynamics change completely when we use high power LEDs.
Thoughts?
Regards,
Deepak