A
Adrian Jansen
- Jan 1, 1970
- 0
Many sources now for these devices, but the few I have inspected all
have relatively large electro caps on the input side, to make DC from
which the current controller PWM draws its supply for the LED drive.
I strikes me that with the published figures for LED lifetimes of 50,000
hours, the electro caps in these are probably going to fail long before
the LEDs and other associated circuitry.
Has anyone investigated sensible ways of running the PWM circuit direct
off the ( full-wave ) rectified line, and accepting the fact that for a
few msec, the input voltage will fall below the 10 volts or so needed to
drive the LEDs ?
Seems to me that would extend the potential lifetime of the driver
considerably.
Any thoughts ?
have relatively large electro caps on the input side, to make DC from
which the current controller PWM draws its supply for the LED drive.
I strikes me that with the published figures for LED lifetimes of 50,000
hours, the electro caps in these are probably going to fail long before
the LEDs and other associated circuitry.
Has anyone investigated sensible ways of running the PWM circuit direct
off the ( full-wave ) rectified line, and accepting the fact that for a
few msec, the input voltage will fall below the 10 volts or so needed to
drive the LEDs ?
Seems to me that would extend the potential lifetime of the driver
considerably.
Any thoughts ?