What are the differences between power adapter and LED driver power supply

April 04, 2023

The power adapter is a kind of electronic products that we often use, which generally refers to the power supply belonging to the stable voltage. The LED drive power supply that we often talk about generally refers to the constant current power supply, also known as the constant current source; But some leds are powered by a regulated power supply such as a power adapter. So what's the difference between the two? Below, follow the power adapter manufacturers together to understand it!

Power adapter

Power adapter (Power adapter) is a small portable electronic equipment and electronic electrical power supply conversion equipment, generally composed of shell, power transformer and rectifier circuit, according to its output type can be divided into AC output type and DC output type; According to the connection can be divided into wall type and desktop type;

LED drive power supply

1. Constant current power driver:

Refers to the use of constant current power supply for LED power supply, constant current power supply output current is constant, and the output DC voltage will change with the load resistance value in a certain range, the smaller the load resistance value, the lower the output voltage, the greater the load resistance value, the higher the output voltage. The LED power carried by the constant current power supply is fixed, such as the 10W LED lamp is the use of 10W constant current source, in terms of LED energy saving and LED luminance balance, constant current source drive LED lamp it is the most ideal way.

2. Stabilized power supply drive:

It refers to the use of regulated power supply (such as power adapter) for LED power supply. Regulated power supply refers to that when the parameters are determined, the output voltage is fixed in a range, while the output current changes with the size of the load. To voltage driven power drive LED, each string needs to add appropriate resistance to make each string of LED display brightness average, such as resistance or each string of LED beads in the LED lamp bead current changes when brightness changes, often use more beads, the use of voltage regulated power drive is less because in the lamp string more, the case plus resistance is more, That will also lose more additional current, in the case of the number of beads is not a lot of use.