一种降低电源峰值电流的电荷泵电路

A novel charge pump circuit with reduced inrush current

为了降低电荷泵电路启动过程中的峰值电流,本文提出了一种具有低峰值电流的电荷泵电路。该电路中采用N-相位时钟电路,产生N个相位不交叠的时钟信号,使得电荷泵启动过程中时钟电路仅对一个电容进行充放电,从而有效减少了电源峰值电流。Hspice仿真结果表明,电荷泵电路级数为4时,所提出的电路能够将电源峰值电流减少约50%。

In order to reduce the startup-time inrush current in charge pump circuits, we propose a novel circuit structure by use of N-phase non-overlapping clock generator that enables only one pumping capacitor to be charged. Hence, startup-time inrush current is reduced significantly. Hspice simulation shows that for a 4-stage charge pump circuit, the inrush current can be reduced by about 50% with the proposed method.