Small-Signal Modeling and Closed-Loop Analysis of Charge Control Employed to Asymmetrical Half-Bridge Dc-to-Dc Converter

전하 제어 비대칭 하프 브리지 직류-직류 컨버터의 소신호 모델링과 페루프 특성 해석

In this paper, small-signal modeling and closed-loop performance of charge control employed to an asymmetrical half-bridge (ASHB) dc-to-dc converters are investigated. The charge control is selected as an alternative to the conventional voltage-mode control and peak current-mode (PCM) control, which have their respective limitations and problems when adapted to ASHB dc-to-dc converters. The current-loop dynamics of the charge control are presented in comparison with those of voltage-mode and PCM control. This paper demonstrates that the charge control offers better dynamic performance compared to voltage-mode control and superior noise characteristics compared to PCM control. The potential problem of charge control are also addressed.