This paper deals with Finite Element Modeling applied to the thermal analysis and design of power converter boards. We built a 3D model of PCB-mounted D2PAK power MOSFETs, and validated it through a comparison with measured temperatures on an ad-hoc designed and fabricated test board. The agreement between model and experiment is excellent. The model was then applied to the thermal analysis of a 400 V to 12 V DC/DC converter. The standard FR4 PCB implementation is shown to be thermally unacceptable, with a MOSFET temperature of 128 °C for 3.5 W of dissipated power. On the other hand, the same layout on a more innovative multilayer baseplate board with a 0.5 mm copper back layer and 70 micrometer thermally conductive dielectric behaves much better, with a MOSFET temperature of 94 °C for 12 W power dissipation.
Thermal simulation of hybrid converters for distributed power supplies / Cova, Paolo; Delmonte, Nicola; Menozzi, Roberto; Vecchi, L.. - (2006), pp. 329-334. (Intervento presentato al convegno Int. Conf. Integrated Power Systems (CIPS 2006) tenutosi a Naples, Italy nel 7-9 June 2006).
Thermal simulation of hybrid converters for distributed power supplies
COVA, Paolo;DELMONTE, Nicola;MENOZZI, Roberto;
2006-01-01
Abstract
This paper deals with Finite Element Modeling applied to the thermal analysis and design of power converter boards. We built a 3D model of PCB-mounted D2PAK power MOSFETs, and validated it through a comparison with measured temperatures on an ad-hoc designed and fabricated test board. The agreement between model and experiment is excellent. The model was then applied to the thermal analysis of a 400 V to 12 V DC/DC converter. The standard FR4 PCB implementation is shown to be thermally unacceptable, with a MOSFET temperature of 128 °C for 3.5 W of dissipated power. On the other hand, the same layout on a more innovative multilayer baseplate board with a 0.5 mm copper back layer and 70 micrometer thermally conductive dielectric behaves much better, with a MOSFET temperature of 94 °C for 12 W power dissipation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
