The series advantage is that the same string of LED brightness uniformity. Because the same current to the LED supply. Moreover, the drive IC simply output a current, we can light series of LEDs, circuit structure is simple. In addition, even if an motorcycle LED light short-circuit fault occurs, the other LED is still able to light up are its advantages.
The disadvantage is that a higher driving voltage. 14 LEDs in series, assuming an LED forward voltage drop (VF) is 4V, the drive voltage to 56V. If the 28 series, is as high as 112V. In addition to the part of the semiconductor vendors’ products, the high drive voltage of the LED driver IC optional range is very narrow.
In addition, there are a series of LEDs to light an LED circuit fault occurs, the shortcomings.
Parallel two advantages. A low voltage to drive multiple LED. If the two series × 14 parallel structure, 8V drive voltage can drive 28 LEDs. Another advantage is that when a series of LED fails for some reason, the other series of motorcycle LED light remains lit. In other words, it is less affected by the failure of the circuit can be formed.
There are two shortcomings. A parallel supply current of the LED string is difficult to control to the same value, so the brightness of each LED string is likely to differ. The other is the drive circuit is more complex. If the parallel number is 14, the need for 14 led high bay string wiring. Moreover, according to the circuit structure, all LED strings must be a separate voltage control and current control, which leads to increased costs.