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Power Converters with Digital Filter Feedback Control by Keng C. Wu

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Chapter 8

DCM Boost Converter with Current-Mode Control

Abstract

Based on the developments given in Chapter 7, this chapter replaces voltage-mode PWM operation with peak current detection and works out its gain. Then modulator gain follows. When required performance is given, controlling-error amplifier is identified and its analog analytical function is extracted. Like all previous chapters, the equivalent digital filter is obtained based on the analog version. Then both of them are verified with simulations.

Keywords

current-mode
current loop
current sensor
transfer function
gain margin
phase margin
loop gain
bilinear transform
digital filter

8.1. Schematic with current-mode control

In contrast to the flyback converter in DCM with current-mode ...

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