According to the electricity usage rules of the power grid and the characteristic requirements of LED non flicker driving power supply, the following points should be considered when selecting and designing LED driving power supply:
1. High reliability, especially the LED flicker free driving power supply for streetlights. It is installed at high altitude and has a waterproof aluminum casing for driving the power supply. If the quality is good, it is not easy to break and reduce maintenance frequency.
2. Efficient LED flicker free drive power supply is an energy-saving product, and the efficiency of the drive power supply should be very high. This is particularly important for the structure of installing a power supply in a light bulb. Due to the fact that the luminous efficiency of LED decreases with the increase of LED temperature, the heat dissipation of LED is very important. High power efficiency, low power consumption, less heat generated in the lamp, reducing the temperature rise of the lamp. Delaying the light attenuation of LEDs is beneficial.
3. High power factor is a requirement of the power grid for loads. Usually, there are no mandatory indicators for appliances below 70 watts. Although the power factor of a single low-power electrical appliance is very low, its impact on the power grid is minimal. However, if everyone lights up at night, similar loads will be too concentrated, which will cause serious pollution to the power grid. For LED driver power supplies ranging from 30 watts to 40 watts, it is said that in the near future, there may be certain requirements for power factor.
4.There are two common driving methods: one is a constant voltage source used for multiple constant current sources, each of which supplies power to each LED separately. In this way, the combination is very flexible, and the failure of one LED will not affect the operation of other LEDs, but the cost will be slightly higher. The other is a DC constant current power supply, which operates in series or parallel with an LED flicker free driving power supply. Its advantages are low cost, but poor flexibility, and the need to address certain LED faults, which can affect the operation of other LEDs. These two forms coexist for a period of time. In terms of cost and performance, the multi-channel constant current output power mode will be better. Perhaps it will become the mainstream direction in the future.
5. The anti surge ability of the LED non flicker drive power supply for surge protection is relatively weak, especially the ability to withstand reverse voltage. Strengthening protection in this field is also important. Some LED flickerless power lights are installed outdoors, such as LED street lights. Due to the onset of grid load and the induction of lightning strikes, various surges will invade the grid system, and some surges will damage the LED. Therefore, the LED flicker free drive power supply must have the ability to suppress surge intrusion and protect the LED from damage.
Additionally,no flicker for all prowell products of DC output -MDC series 、 PTX-III series and PTE series.