New power supply designs are becoming harder to measure for gain margin and phase margin. This measurement is important because step load testing does not measure critical parameters such as conditional stability. Measuring gain and phase of the feedback versus frequency requires finding a point in the loop to inject a test signal. The signal at this point must be confined to a single path, with a low source impedance and high load impedance. A new technique has been developed which doesn't have limitations and can be implemented on virtually any PWM chip. Learn more by downloading our white paper that describes best practices for testing modern control loops. In this white paper we will discuss:
• Why Measure Feedback Loops?
• How Loops Used to Be Measured
• Impedance Criteria
• Signal Injection in Simple and Complex Power Supply
• New Signal Injection Techniques
• Modification to Existing Designs
• Relating Feedback Loop Measurement to Transient Response
Download this application note to learn best-practices for testing modern control loops. Complete the form on the right to gain access.
Fill out this form to gain access to this white paper.