AND8327/D
Conclusion
References
Measuring the frequency response of a multi-loop
switch-mode power supply can be a real challenge,
especially when all the regulation circuitry is kept on the
secondary side. This is often the case with modern current
mode controllers where the feedback input directly controls
the peak current. Hopefully a simple method exists which
combines individually measured loops with a simple
mathematical manipulation. As demonstrated in this paper,
this method is applicable to a wide range of applications.
1. D. Venable, “Stability Testing of Multi Loop
Converters”, Venable technical paper #11
2. C. Basso, “Switch Mode Power Supplies: SPICE
Simulations and Practical Designs”,
McGraw-Hill, 2008
3. Middlebrook, R. D., “Measurement of Loop Gain
in Feedback Systems, International J. of
Electronics”, vol. 38, no. 1, pp. 485-512,
Aprilꢀ1975
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