Comparison of several typical connection methods of optocoupler isolation in switching power supply In general isolated power supply, optocoupler isolation feedback is a simple and low-cost method. However, there has been no in-depth research on the various connection methods and differences of optocoupler feedback. Moreover, in many cases, due to insufficient understanding of the working principle of optocouplers and confusion in the optocoupler connection method, the circuit often fails to work properly. This study will analyze the working principle of optocouplers in detail and compare several typical connection methods of optocoupler feedback.
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