一种浪涌保护电路的研究和设计

Research and design of a surge protection circuit

浪涌冲击是电子产品常见问题之一,它经常造成电子产品的损坏。设计了一种新型的浪涌保护钳位电路,该保护电路包括一个基准电路以及一个反馈控制电路。基准电路在源电压超过钳位电压时根据源电压生成基准电压,反馈控制电路用于接收基准电压并将输出电压钳位到钳位电压。基于上华0.18μm CMOS的工艺对其仿真,结果表明该电路可以很好地实现38 V、27 V、18 V、10 V的钳位,与传统的TVS二极管相比,具有低漏电流、恒定的钳位电压和接近于零的导通电阻等优点。

Surge shock is one of the major reliability issues in electronic products.It causes damage to electronic products.This paper invesitgated and designed a new type of surge protection clamp circuit,which includes a reference and a feedback control.The reference circuit generates a reference voltage based on the source voltage when the source voltage exceeds the clamping voltage,and the feedback control circuit is used to receive the reference voltage and clamp the output voltage to the clamping voltage.Based on the simulations of Shanghua 0.18μm CMOS process,the results show that the circuit achieves 38 V,27 V,18 V,10 V clamping.Compared with traditional TVS diodes,it has low leakage current and constant clamping voltage,and on-resistance is close to zero.