this voltage regulator diode should be used, what should pay attention to? TenThis is to prevent a zener diode lamp lamp does not light the other bad. Just contact, I don't know what parameters are used here. Hope to get expert advice!If you use the 1W LED beads, should use what parameter regulator?If you use 3W LED, should be what parameter regulator?The pictures are as follows: (each LED is connected with a regulator): I hope to receive a sincere answer. Thank you very much!
Two conditions should be met:1, the regulator value is higher than 4 volts, can also be slightly higher. Because the 1W and 3W of LED normally emit light, each operating voltage is typically between 3.2 volts and 3.5 volts, mostly at 3.7 volts. Therefore, the parallel regulator voltage regulator value must be higher than the work voltage of LED, otherwise the electricity from the regulator tube gone, do not go LED, LED will not shine, this is not the original intention of the design.2, a LED circuit for 1W, rated current is greater than 0.3A, LED circuit for 3W, rated current is greater than 0.8A, because once a LED fault circuit, voltage regulator tubes will replace LED to enter the working state, the current through LED, 1W circuit, LED circuit current will reach 0.27A, 3W, current will reach 0.7A. Therefore, the working current of the regulator is greater than the working current of LED. Bigger, better.
That's what it means, because you didn't say anything at all. I thought it was white LED for pure lighting, so the regulator was using 3.3V.The voltage stabilizing parameters of the regulator tube are in line with or consistent with the voltage parameters of the shunt LED. Voltage regulator to LED normal illumination is appropriate, as far as possible do not exceed pressure, overpressure on the life of LED greatly affected.Not an expert, retired, amateur some practical experience and observation. There's a problem. Welcome to discuss it. Try your best and don't make it right.
This is to prevent a zener diode lamp is broken lights are not bright, the other should not. Neither for this design nor for this purpose. The reason is that the LED parameters of 3.2V, 20- hundreds mA, Zener voltage current mA, broken 1 LED, voltage regulator tube alone in series in the circuit, the current mA is impossible to let the rest of the LED normal light, shining down is possible.The voltage regulator tube close to the LED operating voltage is 3.3V. Other nearby voltage regulator parameters are 3.0V and 3.6V, which is clearly inappropriate.LED due to manufacturing reasons, the Constitution can not be completely consistent, resulting in series is not equal partial pressure, voltage difference will inevitably produce brightness difference between LED, which should be avoided in the design of high-grade lamps. In addition, the partial pressure of high LED abnormal early decay (production of new light emitting non-uniform) or even damage. The purpose of the parallel regulator tube is to make up for the difference in the LED constitution between the manufacture, so that the overall luminous of the lamp is consistent and used for a long time.
