LED lightbulbs are not robust against mains transients?
Dear Staff of powerint.com
The owerint.com website contains a number of design reports and schematics of circuits for offline LED lightbulbs.
Isotera.com state on their website, that such designs (ie the type on the powerint.com website) are not robust. Isotera state that their product involves a centralised , single power supply powered from the mains, and then multiple LED bulbs (bulbs without internal driver circuitry) are driven from this centralised power supply. Isotera state that having a single , centralised power supply means that substantial and satisfactory mains transient protection circuitry can be incorporated in the one single place, and that this is preferable to having individual LED bulbs containing insufficient transient protection circuitry.
May I ask what powerint.com thinks about this?
One of the quotes where isotera deride having individual transient protection circuits within each bulb are found here…please see the question titled…
“Is the Isotera system suitable for use with led bulbs fitted into traditional lamp sockets?”
http://www.isotera.com/faq.php
So, please advise, are powerint.com LED lightbulb circuits guaranteed not to fail early in their life due to mains transients?
Hi
PI demobards and reference designs are designed to pass different levels of transient immunity protection. It depends on application, whether residential, commercial or industrial application. You can normally find it at the end portion of the report on which level it is designed for. Its also on the Input specifications chapter on the report.
LED drivers are not different from atypical power supply like cellphone chargers or laptop adaptors. Individually, these are designed to meet immunity standards, so its not right to say that these power supplies including offline LED drivers are not robust to line transients.
Rgds