Design of Isolated Voltage Sampling Circuit Based on HCNR201

Abstract With the continuous development of new energy technology, photovoltaic system plays an extremely important role in people’s production and life, energy. As indispensable part a system, battery voltage monitoring circuit very role. The pack is usually relatively high. To ensure safety users that controller not affected by other adverse factors, this paper designs sampling based on high-precision linear optocoupler HCNR201. detection has strong electrical isolation characteristics can monitor two or more groups. In paper, groups using simulation hardware test results proved method good linearity, high accuracy, while input output user safety.