hcnr201 isolation circuit problem

关尔郑

hcnr201 isolation circuit problem [Copy link]

As shown in the picture, the simulation is good, giving a 0-5V sine wave, but after the actual board is powered on, the first op amp becomes hot and the power is also very high. What is the problem?

chunyang

Using the parameters in the diagram, calculate the op amp output current at the current R2 value, and then check the manual to confirm whether it is appropriate.