Hi,
The attached is the LED current (green) and mains input current (red) of a 15W offline, non isolated Buck LED driver. There is deliberately no electrolytic input capacitor.
Do you believe that this mains input current would violate THD regulations? I mean, it does have the ringing waveform at the mains voltage zero crossings, as you can see.
(The pink waveform is the mains voltage)
The basic schem is also attached...as you can see, its an extremely simple constant off time Buck
The attached is the LED current (green) and mains input current (red) of a 15W offline, non isolated Buck LED driver. There is deliberately no electrolytic input capacitor.
Do you believe that this mains input current would violate THD regulations? I mean, it does have the ringing waveform at the mains voltage zero crossings, as you can see.
(The pink waveform is the mains voltage)
The basic schem is also attached...as you can see, its an extremely simple constant off time Buck