single string of the boost RT8480 structure

single string of the boost RT8480 structure

Plan 4: single string of the boost RT8480 structure

The same single string of design, structure of the boost (figure 4) will be a step-down structure of the low efficiency, but LED to the number of the series of IC limited to no longer withstand, but by MOS to decide, and therefore can be series more LED. Since most of the solar battery output voltage is not high, so solar street lamps suitable for use the boost structure. And choose the current mode of constant current design, can let the output current is not affected by the input voltage, the effects of changes in full battery and almost out of electricity, can let the brightness of the same street light maintain.



The scheme is the advantage of series LED by voltage limit the number of IC, defect is circuit cost is higher, efficiency is buck slightly lower structure. It is suitable for solar street lamps.

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