An Efficient Transfer-Function-Based Approach for the Fast Tuning and Design of DC-DC Converters

This paper presents an effective approach for designing switch mode power supply (SMPS) based on simple transfer functions. Empirical system loop gains for trailing-edge modulation voltage-mode and current-mode buck, boost, and buck-boost converters are listed and verified by laboratory measurement. The method allows practitioners to design DC-DC power converters in an efficient and systematic manner using Type-I, II, or III internal compensation circuitry. The contribution and trade-off of specific components to the system dynamics of a converter is easily captured in the proposed framework. An example demonstrating the optimized design of a stable boost converter is also elaborated.