In power supplies with current mode control topology, the current feedback forms an internal digital loop that cannot be directly measured. The phase margin of this loop is a function of duty cycle, and this loop can become unstable for duty cycles over than fifty percent. Although techniques such as slope compensation can be used to adjust the stability of this internal feedback loop, measurement of this loop is essential to verify the effectiveness of the adjustment. Download this white paper for new best-practices in measuring feedback loop transfer function. In this white paper, you'll learn:
- Techniques for Indirect Measurement of Gain-Phase Characteristics
- How to Optimize the Performance of the Overall Voltage Feedback Loop
- How to Measure Feedback Loop of Power Supplies When No Single Signal Injection Point Is Available
