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Does solar street light use low-voltage or high-voltage chips?

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Does solar street light use low-voltage or high-voltage chips?

solar street lights

      Does solar street light use low-voltage or high-voltage chips? Today, the editor of Shandong ximan will explain to you.


      First, under the same output power, the drive current required by the high-voltage LED is much lower than that of the low-voltage LED. Take Epistar's high-voltage blue 1W LED as an example, its forward voltage drop is as high as 50V, that is, it only needs 20mA drive current to output 1W power, while ordinary 1W LED with 3V forward voltage drop needs 350mA drive current Only 1W power can be output, so the high-voltage LED with the same output power dissipates much lower power than low-voltage LED when working, which means that the cost of heat dissipation aluminum housing can be greatly reduced.

      Second, high-voltage LEDs can greatly reduce the AC-DC conversion efficiency loss. Taking 10W output power as an example, if a 1W high voltage LED with a forward voltage drop of 50V is used, the output terminal can be configured in 2 parallel and 4 strings. The forward voltage drop of 4 series LEDs is 200V, which means that you only need to Electricity 220V alternating current (AC) can use bridge rectification and reduce 20V. But if we use 1W low-voltage LEDs with a forward voltage drop of 3V, even if 10 strings are connected together, the forward voltage drop is no more than 30V, which means that the voltage needs to be reduced from 220VAC to 30VDC. We know that the lower the input and output voltage difference, the higher the conversion efficiency from AC to DC. It can be seen that if high-voltage LEDs are used, the efficiency of the transformer can be greatly improved, which can greatly reduce the power loss during AC-DC conversion. A reduction in heat consumption can further reduce the cost of the heat dissipation housing.

      Therefore, if high-voltage LEDs are used to develop LED general lighting products, the overall power consumption can be greatly reduced, thereby greatly reducing the design requirements for heat dissipation enclosures. For example, we can use thinner and lighter aluminum enclosures to meet the heat dissipation requirements of LED lamps. Since the cost of the heat-dissipating aluminum housing is one of the main cost components of the LED lighting fixture, the effective reduction in the cost of the aluminum housing also means an effective reduction in the overall cost of the LED lighting fixture.


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