Nowadays, many LED products use constant current driving to drive the LED, and the LED connection methods are designed according to the actual circuit needs, generally including series, parallel, hybrid, and array forms.
2、 Parallel connection method
The characteristic of parallel connection is that the LEDs are connected in parallel at the beginning and end, and the voltage borne by each LED is equal during operation.
However, the current may not be equal, even for LEDs of the same model and specification batch, due to factors such as production and manufacturing processes. Therefore, uneven current distribution among each LED may lead to a decrease in the lifespan of LEDs with excessive current compared to other LEDs, which can easily burn out over time.
This parallel connection method has a relatively simple circuit, but its reliability is not high, especially when there are a large number of LEDs, the possibility of failure is higher.
It is worth noting that: The parallel connection method requires a lower voltage, but due to the different forward voltage drops of each LED, the brightness of each LED is different. In addition, if one LED is short circuited, the entire circuit will be short circuited, and the other LEDs will not work properly. If one LED is short circuited. If constant current drive is used, the current allocated to the remaining LEDs will increase, which may cause damage to the remaining LEDs. However, using constant voltage drive will not affect the normal operation of the entire LED circuit.
Our Jinhui Lighting manufacturer company has nearly 20yesrs outdoor lighting and garden lighting manufactured experiences. At the beginning of the produce period that we also has this fault of connection method. But there is no outdoor LED light twenty years ago. Nowadays, LED outdoor lighting products have been widely used.
Extracted from Lightingchina.com
Post time: Aug-08-2024