Abstract

In everyday life, there are many hot-swap scenarios. One of the hazards of hot-swap is that the transient rush currents and voltages generated by hot-swap can damage the post-stage circuitry. Hot-swap protection chips limit the transient power and transient current generated during hot-swap to protect the post-stage circuit. Hot-swap protection chips sometimes need to adapt to large dynamic range voltage swing, which can cause overstress on certain parameters of the chip during use. This paper proposes a method to add an auxiliary source. Theory and experimental verification can be used to extend the dynamic voltage operating range of this chip.