Introduction
All electronic products, whether powered by mains or batteries, contain power regulation circuits that can use either switching or linear power supplies, or both. Feedback control circuits are necessary to stabilize the output voltage of both types of power supplies. Therefore, the design of feedback control circuits has always been a focal point for young power engineers to learn. However, before designing the correct feedback control circuit, power engineers need to understand the frequency response of the power output circuit (Power stage) to be controlled.
In the past, we would use EDA with circuit models to analyze the circuit and predict the frequency response of the power output circuit (Power stage). Then, we would proceed with the first feedback control circuit design. If the circuit worked properly, we could use an FRA/VNA and J210XA injectors to measure the frequency response of the power output circuit (Power stage), and optimize the feedback control circuit according to the measurement results. However, the whole process was very time consuming and cumbersome.
J2103A Power Stage Isolator is a device that replaces feedback control circuits to control the power output circuit (Power stage). The advantage of using J2103A before designing the feedback control circuit is that we can perform frequency response measurements on the power stage output circuit and design the feedback control circuit based on the actual measurement results. This allows us to achieve a nearly complete design process in one iteration. Finally, by integrating the power stage output circuit and the feedback control circuit, the overall design result is relatively accurate, and it significantly shortens the design timeline.
