Shenzhen Fining Electronics develop, produce and sell LED driver power supply
. Products include traditional constant current LED driver power, constant voltage LED driver power.
LED power is widely used in road lighting, landscape lighting, stage lighting and other scenarios, high-performance products are suitable for indoor or outdoor occasions. We always take the excellent engineering technology experience and the good product quality as the background, the product performance conforms to the industry standard. Our goal is to provide you with efficient and high-performance LED driver products and lighting control solutions.
Lighting has a profound impact on human society. It not only affects what we see, but also affects people's emotions. Focus on enhancing the impact of light on People's Daily life.
How to choose LED driver mode?
The typical LED drivers on the market today include two types: linear drives and on-off drives. Switching voltage regulators are used for large current above 500mA, as the linear driver is limited to its own structure and cannot provide such large current. In low current applications where the current is less than 200mA, linear or separate regulators are usually used. In the medium current range of 200 to 500mA, either a linear regulator or a switching regulator can be used.
Switch regulators provide high energy efficiency and excellent brightness control. The linear voltage regulator is simple in structure, easy to design, provides steady current and over current protection, and has no electromagnetic compatibility (EMC) problem.
In low current LED applications, resistive led drivers, despite their low cost and simple structure, have low forward current under low voltage conditions, leading to insufficient LED brightness, and LED may be damaged under transient conditions such as sudden load drop. And the resistance is energy dissipation element, the energy efficiency will be lower. For example, in the application of LED lighting with dc-dc power supply, the driving mode of LED can be resistance type, linear voltage regulator and switch voltage regulator, etc.
In the resistive driving mode, the forward current of LED can be controlled by adjusting the current detection resistance in series with LED. This driving mode is easy to design, low cost, and has no EMC problem. The disadvantages are voltage dependent, need to screen (binning) LED, and low energy efficiency.
Linear regulators are also easy to design and have no EMC problems. They also support current current stabilization and over current protection (fold back) and provide external current setpoints. Switch voltage regulator through PWM control module to continuously control the switch (FET) on and off, and then control the flow of current.
Switching regulators have higher energy efficiency, which has nothing to do with voltage, and can control brightness. The disadvantages are relatively high cost, higher complexity, and electromagnetic interference (EMI) problem. Common topologies of LED dc-dc switching voltage regulators include Buck, Boost, buck-boost, or single-terminal primary inductor (SEPIC).
Among them, when the minimum input voltage is larger than the maximum voltage of LED string under all working conditions, a step-down structure is adopted, for example, 24V dc is used to drive 6 leds in series; On the contrary, when the maximum input voltage is less than the minimum output voltage under all working conditions, a booster structure is adopted. For example, 12V dc is used to drive 6 leds in series. When the input voltage overlaps with the output voltage range, the step-boost or SEPIC structure can be adopted, such as 12V dc or 12V ac to drive 4 leds in series, but the cost and energy efficiency of this structure are the worst.
Led driver power supply:
150W Constant Voltage Waterproof LED Driver
24W AC/DC Constant Voltage LED Driver Power Supply
36W AC/DC Constant Voltage LED Driver Power Supply