Follow the heat from the junction to ambientA metal-core PCB is one part of the cooling system. Include the package, TIM and heat sink.Follow the heat from the junction to ambientA metal-core PCB is one part of the cooling system. Include the package, TIM and heat sink.
LED package / junction
Copper circuit & solder interfaceElectrically insulating thermal dielectricMetal base: spreading and mechanical supportTIM: contact quality, thickness, pressureHeat sink / chassis → airflow → ambient
Illustrated: conventional insulated metal substrate. Direct thermal pad constructions differ.
³Ô¹Ïtv engineering illustration • simplified, not a production cross-section or measured thermal field