When performing power-level small-signal modeling, the boost regulator has two disadvantages compared to the buck regulator: first, it has a right half-plane (RHP) zero determined by duty cycle and load, thus adding The derivation complexity of the model is large; second, the boost regulator is not as commonly used as a buck regulator, so it does not put much effort into deriving an accurate small-signal model. In this article, we will introduce a simplified model for a current-mode boost converter (used as a voltage regulator), along with several suggested modifications to the standard practice in order to predict the behavior of the up-regulator. Peak current mode control (controlling the inductor/switching current in the boost regulator, rather than the output current) is common in low-end controllers and monolithic ICs, where their control switch emitter/source are connected to the system ground. All common switching regulators available with low-end controllers, such as boost, flyback, single-ended primary inductor converter (SEPIC) and Cuk converters, have RHP zeros. Current mode control simplifies the control-to-output conversion function by shifting an output LC pole to a high frequency above the control loop bandwidth. The performance of both voltage regulators and current regulators can be predicted by the following power stage conversion equations: For the difference between the voltage regulator and the current regulator in the formula, refer to Figure 1 and Figure 2 below. Figure 1 voltage regulation circuit Figure 2 Current Regulation Circuit
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