1. Raghuchandar Rajula

    High density power converters' internal ambient temperature issue

    Hi, We have designed a 50kW 3 level boost converter for our fuel cell EV application with liquid cooling. It is an IP65 module of dimensions 400mm x 300mm x 85mm. Its internal ambient temperature is rising very high. There is no specific component that emitting abnormal heat it seams, but we...
  2. S

    Does having high thermal resistance in a diode SMT package reduce efficiency?

    Hi All, Having an almost philosophical thought regarding poor thermal dissipation of surface mounted Silicon carbide diodes with thermal pads. I tested my resonant converter and expected >90% efficiency but only get around 70% at full-load. I put a FLIR camera onto the board and noticed that...
  3. S

    Collision errors on Altium when connecting component thermal pad to bottom layer copper planes

    Hi all, I keep getting the error Clearance constraint (collision < 0.254mm) between via on multilayer and pad on top layer". The top layer is a thermal pad, bottom layer is a copper plane that is connected to the cathode of the diode. It is a Cree SiC diode, and it should not be connected to...
  4. M

    Understanding of Thermal metrics of PCB, heatsinks, How heat flows/converts - Books recommendation

    If i can't ask these kind of book recommendations here please suggest another forum. I want to understand more about Thermal metrics of PCB (Like how traces, Vias, planes etc interact thermally how they will get cooled), Heat sinks designing (like Fin structure, spacing, materials how they will...
  5. jm_sanz

    Estimating junction temperature from top case of SMD MOSFET

    Good afternoon to everybody. First post over here! :D I am working on the estimation of junction temperature from top case temperature measurement. I have seen that manufacturers avoid the characterizing the molding this resistance which is crutial for this purpose. From now on I will take...
  6. M

    high temperatur covering system for battery and PCB

    Hi everyone; I'm doing a reverse engineering for thermocouple system that works in specifique condition (temperature=300°C), knowing that the originaly systeme use the material below in the figure for covring the battery and the pcb. I have already finished the electronique parts and the pcb...
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