A Peak-Capacitor-Current Pulse-Train-Controlled Buck Converter With Fast Transient Response and a Wide Load Range

作者：Sha, Jin^*; Xu, Duo^*; Chen, Yiming^*; Xu, Jianping^*; Williams, Barry W.^*

来源：IEEE Transactions on Industrial Electronics, 2016, 63(3): 1528-1538.

DOI：10.1109/TIE.2015.2494851

• Capacitor current feedback
• pulse train (PT) control
• switching dc-dc converter
• wide load range

It is known that the ripple-based control of a switching dc-dc converter benefits from a faster transient response than a conventional pulse width modulation (PWM) control switching dc-dc converter. However, ripple-based control switching dc-dc converters may suffer from fast-scale oscillation. In order to achieve fast transient response and ensure the stable operation of a switching dc-dc converter over a wide load range, based on a conventional pulse train (PT) control technique, a peak capacitor current PT (PCC-PT) control technique is proposed in this paper. With a buck converter as an example, the operating modes, steady-state performance, and transient respond performance of a PCC-PT controlled buck converter are presented and assessed. To eliminate fast-scale oscillation, circuit and control parameter design considerations are given. An accurate discrete iteration model of a PCC-PT controlled buck converter is established, based on which the effects of circuit parameters on the stability of the converter operating in a discontinuous current mode (DCM), mixed DCM-continuous conduction mode (CCM), and CCM are studied. Simulation and experimental results are presented to verify the analysis results.

• 出版日期2016-3
• 单位西南交通大学