1. LED lighting materials are highly influenced by environmental factors.
The increase in temperature leads to an increase in current and voltage of the LED. If the rated current is exceeded for a long time, it will greatly shorten the lifespan of the LED. Constant current for LEDs ensures that the current value remains unchanged despite changes in environmental factors like temperature and voltage.
2. Solar streetlight power supply, constant current accuracy:
Some power supplies on the market have poor constant current accuracy, with popular recommended solutions featuring an error of up to ± 8%. Generally, a constant current error of ± 3% is acceptable. Designs with ± 3% require fine-tuning during production to achieve the desired accuracy.
3. The voltage of the solar streetlight power supply:
The recommended voltage for LEDs is generally 3.0-3.5V, and testing shows that most operate around 3.2V, making calculations based on 3.2V quite reasonable. The total voltage for N LEDs in series equals 3.2 * N.
4. What is the appropriate current for the solar streetlight power supply:
For instance, if the rated current of the LED is 350 milliamps, some factories might design it to be 350 milliamps from the start, but this can cause significant heating. Through multiple comparative tests, a design of 320 milliamps is considered ideal to minimize heat and convert more electrical energy into visible light.
5. How wide should the series and parallel connections of the solar streetlight power supply be?
To ensure that the LED solar streetlight power supply operates within a wide input voltage range, such as AC85-265V, the series and parallel configuration of the LED board is very important. Avoid wide voltage ranges; instead, categorize into AC220V and AC110V whenever possible. This ensures power supply reliability. Given that the current power supplies are generally non-isolated buck constant current supplies, when the voltage requirement is 110V, the output should not exceed 70V, with a maximum of 23 in series. At an input voltage of 220V, the output voltage can reach 156V, allowing a maximum of 45 in series. Keep parallel connections to a minimum to prevent excessive current, which can lead to overheating. Another wide voltage solution involves Active Power Factor Correction, which initially raises the voltage to 400V before stepping it down, effectively using two switching power supplies under specific conditions.
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Solar streetlight manufacturer in Bitpott, specializing in the research, development, production, and sales of solar and LED outdoor lighting, with many years of production experience and advanced manufacturing equipment, ensuring quality, reasonable pricing, and configuration for LED solar streetlights.
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