asdf44
Advanced Member level 4
What are some good strategies for temperature sensing power components, fets, transformer cores etc, which have high voltages (400V) and are across a safety isolation barrier from the sensing circuit.
This is a general question, we have applications with both surface mount and through hole (TO-220/247) and I haven't arrived at any solutions that I particularly like from an accuracy, cost and maneuverability perspective.
I've found some NTC's which are on long wire leads. They're straightforward to glue to whatever I want but they aren't sufficiently insulated for safety. It may be possible to augment them with shrink tubing etc but I don't see a great path there.
I've also just placed SMT temperature sensing parts (NTC's and I2C type sensors) near my components of interest but safety isolation demands substantial spacing which hurts accuracy and harms the power layout.
What ideas have other people used?
This is a general question, we have applications with both surface mount and through hole (TO-220/247) and I haven't arrived at any solutions that I particularly like from an accuracy, cost and maneuverability perspective.
I've found some NTC's which are on long wire leads. They're straightforward to glue to whatever I want but they aren't sufficiently insulated for safety. It may be possible to augment them with shrink tubing etc but I don't see a great path there.
I've also just placed SMT temperature sensing parts (NTC's and I2C type sensors) near my components of interest but safety isolation demands substantial spacing which hurts accuracy and harms the power layout.
What ideas have other people used?