Hello Everyone,
I have 11 strings of 3 LEDs in a series connection (Power LED from Lumiled Z series). I have shorted all the cathodes together so to avoid a series of LED failing issues.
If one LED fails in a string and rest will remain functioning with a slight change in current (500mA to 600mA). The LED's forward voltage is 2.8VDC at 500mA.
I have simulated the circuit and got the expected result in LTSpice (attached for reference). Can someone guide me or verify the circuit works fine in real life? I'm going to use a constant current LED driver and not going to use a resistor in series with LEDs.
The LED has a built-in TVS diode. Is there any other circuit to be included to protect this circuit?
Please share your valuable suggestions.
Thanks,
Arul
I have 11 strings of 3 LEDs in a series connection (Power LED from Lumiled Z series). I have shorted all the cathodes together so to avoid a series of LED failing issues.
If one LED fails in a string and rest will remain functioning with a slight change in current (500mA to 600mA). The LED's forward voltage is 2.8VDC at 500mA.
I have simulated the circuit and got the expected result in LTSpice (attached for reference). Can someone guide me or verify the circuit works fine in real life? I'm going to use a constant current LED driver and not going to use a resistor in series with LEDs.
The LED has a built-in TVS diode. Is there any other circuit to be included to protect this circuit?
Please share your valuable suggestions.
Thanks,
Arul
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