Integrated power supply with heat dissipation structure

Integrated power supplies achieve efficient heat dissipation through modular design, advanced packaging, and multi-layer PCB cooling techniques.Thermal Management in Power SuppliesIntegrated power supplies generate heat due to energy losses in components such as transformers, power switches, resistors, and capacitors. Effective thermal management is critical for maintaining performance, efficiency, and reliability. Heat can be dissipated through conduction, convection, and radiation, with conduction transferring heat through PCB copper and metal enclosures, convection using air or liquid flow, and radiation emitting energy as electromagnetic waves. Thermal resistance, measured in °C/W, is a key parameter for evaluating heat transfer efficiency from components to ambient air, and the use of heat sinks or thermal pads can further reduce junction temperatures and improve reliability .Advanced Packaging for Heat DissipationModern integrated power supplies often employ chip-embedded packages to enhance thermal performance. Coreless, thin packages (as low as 0.34 mm) allow heat to dissipate quickly to the substrate, reducing thermal resistance and enabling high power density in compact designs. These packages support heterogeneous chip bonding and SoC-like integration, making them suitable for high-power applications such as multi-core processors and FPGAs .Multi-PCB and Liquid Cooling ApproachesFor high-power converters, multi-PCB cooling (MPDC) structures are used to maximize thermal dissipation while maintaining compactness. Vertically stacked PCBs allow efficient space utilization, and components are sorted based on power loss to optimize cooling. Integrated liquid cooling can further reduce temperature rise in critical devices, achieving up to 50% lower temperature increases and improved efficiency. Experimental prototypes have demonstrated that multi-layer PCB designs can increase power density by over 30% while maintaining thermal performance .System-Level IntegrationIntegrated power supplies combine power conversion, distribution, backup, protection, and monitoring into a single unit. Modular assembly structures, as seen in telecom and data center applications, provide lightweight, compact, and thermally efficient solutions. These systems often include advanced lithium battery storage and photovoltaic integration, ensuring stable DC output and reliable operation in diverse environments .Key ConsiderationsThermal resistance optimization: Minimize junction-to-ambient resistance using heat sinks, thermal pads, and PCB design.Component placement: Sort high-loss components to maximize cooling efficiency.Cooling method selection: Use natural or forced convection, and consider liquid cooling for high-power density applications.Package design: Employ thin, coreless, or chip-embedded packages to reduce thermal bottlenecks.System integration: Modular and intelligent designs improve both thermal performance and operational reliability. By combining these strategies, integrated power supplies can achieve high efficiency, compact form factors, and reliable heat dissipation, making them suitable for modern high-power and high-density applications .