LED 50won July 16th, 2012 at 3:44 AM
Need to use more LED products, if all of the LED flood light 50w in series, you will need a higher voltage of the LED driver output: If all the LEDs in parallel, you need to LED driver output current. All the LEDs in series or in parallel, not only limited by the strict usage of the LED and parallel LED load current, the drive’s cost will increase, the solution is to use the hybrid approach. String, the number of parallel LEDs evenly distributed, so that allocation of the series branch circuit voltage in an LED 30w with a series of slip in the current on each LED is basically the same, consistent brightness through each series branch current also similar.
Second, the circuit performance
A series branch has an LED of poor quality and short-circuit the regulator drive or constant current drive, will increase the current through the series circuit, very easy to damage the LED 50w series branch. Large current through the damage to the LED strings, due to the current passing through more than the performance of the circuit. Disconnect an LED in series slip regulator drive, the drive output current will be reduced without affecting the remaining LED work properly.
If you use a constant current LED drive mode, the output current of the drive remain unchanged, distribution in the rest of the LED current will increase, easy to damage all of the LEDs. The solution is as much as possible in parallel LED 100w , so that when a particular LED is disconnected, the allocation of the remaining current in the LED is not, does not affect the rest of the LED work properly.
This first series of the advantages of the parallel line is the line is simple, stable brightness, high reliability, and consistency requirements of the device is low, no special selection of devices, even though the individual LED single tube failure, the entire light-emitting components The impact is also small. In the case of larger changes in the work environment factors, the use of this connection in the form of light emitting devices more desirable.
Hybrid approach, there is another connection, that is, the LED flood light 10w average allocated block in parallel, and then each group connected in series. Poor quality of an LED and short circuit regulator drive or a constant flow-driven approach, the LED will be parallel in this branch does not shine. If you use a constant current LED drive mode, the output current of the drive remain unchanged, except in parallel with the shorted LED parallel branch, the rest of the LEDs are working properly. More number of assumptions parallel LED drive current of the drive, only short-circuit the LED current will increase. Large current through the LED after only a short circuit, can easily become open circuit. More parallel LEDs, an LED is disconnected, the average distribution of current changes little, the rest of the LED uv infrared is still working properly, so only one LED in the LED light does not shine.