Do You Know the Linear LED Driver?

February 13, 2020 | 11:00
Disassembling electronic devices, broken or not, can be very instructive. After recovering a dead 30 W LED floodlight in the dumpster and taking it apart, an unusual circuit was uncovered. Instead of the expected basic string of LEDs in series with the main voltage and maybe a current-limiting resistor, the driver turned out to be a so-called (sequential) linear LED driver or direct AC LED driver. This clever design has a much better power factor than the classic design. Repairing the spot was surprisingly easy.

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