热插拔(Hot Swap)硬件设计技术是实现即插即用的关键技术。早期的热插拔主要是依靠电感电容对瞬态冲击的抑制来实现,但这种做法上电瞬间对电源的冲击仍然较大,后来引入了延迟上电的概念,但电路设计存在电流控制不好、可靠性不高等缺点,本文提出了采用新型的专用热插拔芯片来实现可靠的热插拔,并且提出了不同供电情况下的设计方案。 Hot Swap (Hot Swap) hardware design technology is the key technology to achieve plug and play. Early hot-plug mainly rely on the inductor capacitance suppression of transient impact to achieve, but this approach instantaneous power on the impact of the power is still large, and later introduced the concept of delayed power-up, but the circuit design current control is not Good, low reliability, this paper proposes a new type of dedicated hot-swappable chip to achieve a reliable hot swap, and put forward the design of the case of different power supply.