关键词: 系统级封装, 电源防反器, 铜夹互连

Abstract: The cold-oring reverse polarity protector is a power supply device utilizing MOSFETs to prevent power supply polarity reversal and current backflow. It has low forward voltage drop, high current carrying capacity, and rapid response, and is widely deployed in aerospace, portable electronics, industrial equipment, and automotive electronics. Most existing MOSFET-based protectors employ board-level packaging, suffering from high on-resistance, excessive thermal dissipation, and large dimensions. A system-in-package structure is proposed. By integrating power chips, control chip and passive components within a ceramic housing, the package thickness has been reduced by 24% and the mass by 45%. By optimizing the interconnect process and replacing traditional PCB pin interconnects with copper clamps, the on-resistance is reduced. It achieves a 43% decrease in initial forward voltage drop under high-temperature operation, with excellent performance during long-term full-load conditions.

Key words: system-in-package, power supply reverse polarity protector, copper clamp interconnect