Control Loop Stability Measurement in PSU

What Are Control Loops in SMPS?

Switched Mode Power Supplies (SMPS) use control loops to ensure that the working point is obtained with the minimum steady state error and fast transient response.

To achieve these objectives, a strong control action is needed. But if this action is too aggressive, it can make the system unstable, lead to oscillations that can increase ripples, component stress or even damage the converter or loads.

Control Loop Stability Measurement
Confused by control loops? Read our RDI team’s tips for control loop adjustments and measuring

The control action can be estimated with linear control calculation techniques. It is because, although SMPS are nonlinear, time varying systems due to the switching actions, they can be modeled with an averaged small-signal linearized model.

In this technical article our RDI team give you some good practices and tips for control loop adjustment and measuring in our power conversion systems.

Read our “Control Loop Stability Measurement in Power Supplies” document.

This article was originally published by Premium Power Supplies.

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