2024-11-22
The difference between series and parallel led chip
The difference between series and parallel led chip
The difference between series and parallel LED chip
series features :
- all damage : if one LED chip is damaged, the whole series circuit will be affected, and all the lamp beads will be extinguished.
- uniform brightness : Because the current is the same, the LED brightness in series is consistent.
- High voltage requirement : High drive voltage required after series.
- Application scenario : Applicable to scenarios where high voltage is required and the brightness is uniform, for example, the LCD backlight.
Parallel features :
- each doing his job : one lamp bead is damaged, the other led chip continues to light up.
- low voltage drive : The voltage remains constant in parallel, suitable for low voltage environment.
- current distribution problem : Parallel LED series current is difficult to control to the same value, the brightness may be different.
- Application scenario : suitable for situations requiring high optical output, large power, and small number of lamp beads, such as high brightness flashlight.
Understanding the difference between series and parallel LED lamp beads helps to choose the appropriate connection method according to actual needs, to ensure the normal use and brightness effect of LED lights.
How to control the current when LED chip are in parallel
- Choose the right drive :
The parallel LED requires the driver to output a large current, and the LED driver that can provide a stable current should be selected.
- Resistor partial voltage :
In each LED branch, a resistor with an appropriate resistance value is connected in series to divide the voltage and limit the current to ensure the normal operation of the LED.
- Select a good consistency LED :
The selection of led chip with better consistency can reduce the difference in the current of each branch in parallel and improve the uniformity of brightness.
- Avoid sharing current limiting resistors :
When multiple LED lights are in parallel, the current limiting resistance should not be shared as much as possible to avoid uneven current distribution.
- Consider a hybrid approach :
If the number of leds is large, the hybrid mode (series and parallel combination) can be used to reduce the requirements on the driver and facilitate current control.
Through the above method, the current of the LED lamp bead in parallel can be effectively controlled to ensure the normal operation and brightness effect of the LED.
Through the above method, the current of the LED lamp bead in parallel can be effectively controlled to ensure the normal operation and brightness effect of the LED.
What is the maximum parallel current of LED chip
- Low power LED :
LED for indication, its current is generally low, usually in the range of 5-10mA, 1mA can be lit.
A low-power LED used to illuminate white light, the operating current is usually 20mA.
A low-power LED used to illuminate white light, the operating current is usually 20mA.
- high power LED :
High-power leds, such as 1W leds, allow the maximum safe current through 350mA.
- Parallel circuit features :
In parallel, the current of each LED branch should be as consistent as possible to avoid uneven brightness.
A suitable driver needs to be selected to provide a stable current output.
Resistors of the appropriate resistance value are connected in series in each LED branch to divide the voltage and limit the current.
In summary, the maximum current of LED beads in parallel varies according to the power and specifications of the LED. In practical applications, the maximum current value should be determined according to the specific parameters and circuit design of the LED.
A suitable driver needs to be selected to provide a stable current output.
Resistors of the appropriate resistance value are connected in series in each LED branch to divide the voltage and limit the current.
In summary, the maximum current of LED beads in parallel varies according to the power and specifications of the LED. In practical applications, the maximum current value should be determined according to the specific parameters and circuit design of the LED.
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