The following is explained in three paragraphs. The middle value of the LED in Table 1 is 3. If the lamp uses another current, or the peak value of the ripple current of the power supply changes greatly, the voltage value should be re-estimated according to the V-I characteristic curve.1A (399W) conditions in a steady state, and the worst case is 207V (435W). LED power supply selection: Recommended model HLG-480H-C2100, the reasons are as follows. Voltage calculation example A lamp uses 100 LEDs to drive at 1. Step 2: 50 strings, so the total voltage is 50 times that of a single LED.

When the machine is cold, the highest voltage will reach 249V. The designer does not need to spend more budget to select a higher power power supply to ensure the short-term demand for turning on. Step 4: Refer to the temperature coefficient. In other words, the power supply does not need to unconditionally reserve the voltage margin required for the cold start, but only needs to temporarily increase the output voltage range for a short period of time after the start.

How should the designer determine the appropriate LED power supply? Method 1: Ask the LED manufacturer if there is any tool software available, enter the parameters, and get the answer directly.?In the design of lamps and lanterns, how to estimate the voltage of the LED is a seemingly simple knowledge that requires attention to many details.2V at 85°C, and 3. The main purpose of the lamp is of course to meet the light requirements of the application environment, such as illuminance or color temperature and so on.125 <1. There are also many possibilities for other models.

Figure 4 V-T curve microwave sensor ufo led high bay light constant power series also have similar functions. After the LED is turned on, the voltage will gradually drop back to the normal level due to self-heating. In addition, in view of the influence of temperature, the new LED power supply has the function of adapting to the environment. 1 Ideal V-I curve Fig.2 Cold The median value of the total LED voltage at startup is 190V x 1.