Design & implementation of an A-type residual current circuit breaker IC

Nowadays, electrical equipments are becoming more and more complex in industrial production and people's daily lives. The case that non-sinusoidal residual current appearing in the power grid is gradually increasing in modern society. However, the traditional AC-type leakage protector is insensitive to such residual current, and it cannot have an effective protection. So the A-type leakage protector which is more functional is becoming widely used. This paper introduces a new ASIC chip ZDAB01 for A-type leakage protector. This chip is designed and implemented in CSMC 0.5um Mixed CMOS process, and has completely independent intellectual property rights. Test results has confirmed that ZDAB01 performance meets the corresponding provisions of the national standard and has a strong anti-interference ability. The A-type leakage protector becomes more and more popular, and ZDAB01 chip will show great market prospects and social benefits.1.