Abstract
Based on the analysis of the overshoot during the process of short-circuit recovery, an improved hiccup mode protection technique with effective overshoot suppression is presented in this paper. The hiccup mode is activated by the error amplifier (EA) output rather than the feedback voltage. And when the voltage exceeds the high-clamping voltage, the soft-start voltage will be quickly discharged to zero and a new soft-start cycle will attempt to restart the converter. The proposed control method makes the EA output voltage rapidly decline once short-circuit recovery happens, which is very effective for the suppression of overshoot. In addition, the circuit has combined with a foldback current limiting method to further improve the effect of short-circuit protection and overshoot suppression. The proposed technique has been successfully applied to a peak current mode buck converter with Nuvoton 0.6-μm 5 V/18 V Low-V <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex Notation="TeX">$_{\rm gs}$</tex></formula> CDMOS process. The experimental results show that even in extreme cases, this method can effectively suppress the overshoot and the overshoot is almost zero.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.