Publish Time: 2022-08-18 Origin: FOCUS LIGHTING-LED LIGHTING MANUFACTURER
Table of Contents
What's the constant current？What's the voltage source？Difference between constant current and constant voltage.
What's the constant current？What's the voltage source？And their difference.
A constant current (steady current, time-independent current, stationary current) is a type of direct current (DC) that does not change its intensity with time.
The constant voltage source is what we called a regulated power supply, which ensure voltage keep steady when the load (output current) changes.
In brief: Constant current is kept current is certain data, while constant voltage is kept voltage steady.
How to identify constant current and constant voltage led driver？
Step 1: Check electrical parameters
Step 2: If voltage is a certain data, current is a range, then it's constant voltage led driver.
If voltage is a range and marked a certain current, then it's constant current led driver.
For example Mean Well led power supply driver:
LRS-350-36 model showed exactly data 36V is a certain number, so is constant voltage led power supply.
APC-16-350 model you can find it marks"contant current", or you can check that Input: 100-240VAC, 0.35A, it's a certain of current, range of voltage. So it's constant current led power supply.
Constant voltage and constant current led driver application
Due to the characteristics of LED chips the constant current power supply is widely used in market. Almost 90% led products is used constant current led drivers.
Parking Lot HID LED Bulbs
Brasket Ball Flood Light
Office Panel Light
Parking Tri-Proof Light
Villa Magnet Track Lighting
4S Car Chain Down Light
Residential Track Light
Outdoor Decoration Wall Light
But for some application like curve led strip light considering cost and installation convinent, Constant voltage is more popular. You must be heard that DC5V/ DC12V/ DC24V led strip light, it means used constant voltage DC5V or 12v or 24v power supply for led strip.
LED strip light for curve
Tips when used constant voltage led driver:
Do not used multiple power supplies in parallel in the same circuit.
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