what is a led bulb? LED in the commercialization of specific applications often need dozens or even hundreds of LED combinations together, constitute the light emitting device, the LED load circuit connected directly related to the reliability and service life of LED components. This is because the LED circuit can work safely, and its basic function has two aspects: First, to maintain a constant current. Second, the drive circuit should be kept lower power consumption, in order to make the efficiency of the LED high bay system in a high level.
1, Series: The series circuit is the number of the LED cathode to anode connectedclusters, the advantage of operating current through each LED are generally required tostring together with the current limiting resistor. The drawback is that this circuit requires apower supply higher voltage. Voltage equation and the circuit current using the following formula:
V total = LED VF = VF1 + VF2 + VF3 ... + VFn
I = total individual LED IF value
2, parallel: parallel circuit is the number of LED cathode and anode, cathode andanode parallel connection, which is characterized by the operating voltage of each LED, total current is ΣIFn, in order to ensure that each LED current IF. needs consistent with the forward voltage of each LED. However, this circuit drawback is that the power supply can provide a higher current. Voltage equation and the circuit current using the following formula:
V total = VF value of each LED
I total = each LED IF =, IF1 + the IF2 + IF3 ... + IFn
3, series / parallel combination of: the LED connected in series / parallel combination ofform, the biggest benefit is you can significantly reduce the impact of VF inconsistent. Also, we should be reminded that, changes in the composition of the array form or LED street light number should also be timely adjustment of the current limiting resistor. Appropriate current limiting resistor in order to effectively control the current in the circuit configuration in the circuit. Of course, the series / parallel combination circuit causes the output current with the input voltage and ambient temperature and other factors, a significant change occurs.
This is the answers of what is a led bulb.