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What are the differences between power adapter and LED drive power

source:power adapter     Popular:adapter     release time:2021-06-26 09:24:36     Article author:sznbone    

  The power adapter is a kind of electronic product we often use. It generally refers to a regulated power supply. The LED drive power we often talk about generally refers to a constant current power supply, also known as a constant current source; but there are also LEDs that use stable It is powered by a voltage source such as a power adapter. So what is the difference between the two? Let's follow the power adapter manufacturers to learn about it!

  Power Adapter

  Power adapter is a power supply conversion device for small portable electronic equipment and electronic appliances. It is generally composed of a casing, a power transformer and a rectifier circuit. According to its output type, it can be divided into AC output type and DC output type; according to the connection method can be Divided into wall type and desktop type;

What are the differences between power adapter and LED drive power(图1)

  LED drive power

  1. Constant current power drive:

  It refers to the use of a constant current power supply to supply power to the LED. The output current of the constant current power supply is constant, and the output DC voltage will change within a certain range following the change of the load resistance. The load resistance is small, the output voltage is low, and the load resistance The larger the value, the higher the output voltage. The LED power carried by the constant current power supply is fixed. For example, a 10W LED lamp uses a 10W constant current source. In terms of LED lamp energy saving and LED brightness balance, it is the most ideal way to drive the LED lamp with a constant current source. .

  2, stabilized power supply drive:

  It refers to the use of a stabilized power supply (such as a power adapter) to supply power to the LED. A stabilized power supply means that when the various parameters are determined, the output voltage is fixed within a range, but the output current changes with the size of the load . To drive the LED with a regulated power supply, each string needs to be added with a suitable resistance to make each string of LEDs show an average brightness. For example, the resistance or each string of LED beads will change the brightness when the current changes, so it is often used In the case of more lamp beads, the use of stabilized power supply is less because the more lamp strings, the more resistance is added in the case, which will also consume more extra current, and the number of lamp beads is not very large. In the case of the use of more.


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