In static switching applications, power supply design focuses on minimizing conduction losses, optimizing thermal performance, achieving compact and lightweight system design, while achieving high quality at low cost. In order to meet the needs of new generation solutions, Infineon Technologies Technology Co., Ltd. is expanding its CoolMOS ™ The product lineup of S7 series high-voltage superjunction (SJ) MOSFETs. This series of devices are mainly applicable to applications such as switching power supply (SMPS), solar energy system, battery protection, Solid-state relay (SSR), motor starter and solid state circuit breaker, as well as Programmable logic controller (PLC), lighting control, high-voltage electronic fuse/electronic circuit breaker and (hybrid) electric vehicle on-board charger.

This product portfolio has undergone significant expansion with the addition of innovative QDPAK Top Cooling (TSC) packaging, which enables rich functionality in smaller package sizes. These characteristics make the device highly advantageous in low-frequency switching applications, while also reducing costs. Thanks to the new high-power QDPAK packaging, the conduction resistance value of this device is only 10 m Ω, which is the lowest among products of the same voltage level and products using SMD packaging in the market. The CoolMOS S7/S7A solution maximizes the conduction loss of MOSFET products, improves overall efficiency, and provides a simple, easy-to-use, and cost-effective way to improve system performance.

The CoolMOS S7 power switch also utilizes improved thermal resistance to effectively manage heat dissipation. By adopting innovative and efficient QDPAK packaging, the demand for heat sinks in solid-state designs is reduced or even eliminated, making the system more compact and lightweight. This series of MOSFET products offers two packaging forms: top heat dissipation and bottom heat dissipation, both of which can withstand high pulse currents and cope with sudden surge currents. In addition, this series of MOSFET products also have the robustness of body diodes, ensuring reliable operation during AC line commutation.

Due to the limited number of components required, CoolMOS ™ The S7 series high-voltage superjunction (SJ) MOSFET can reduce the number of components, thereby achieving flexible system integration, reducing BOM (bill of materials) costs and total cost of ownership (TCO). At the same time, this series of MOSFET products can also shorten the reaction time, especially when breaking the current, it can operate more smoothly and efficiently.