A New Buck Converter With Optimum-Damping and Dynamic-Slope Compensation Techniques

作者：Chen Jiann Jong^*; Hwang Yuh Shyan; Liou Jian Fong; Ku Yi Tsen; Yu Cheng Chieh

来源：IEEE Transactions on Industrial Electronics, 2017, 64(3): 2373-2381.

DOI：10.1109/TIE.2016.2626361

• Buck converter
• current-mode control (CMC)
• dc-dc converter
• dynamic-slope compensation
• optimum-damping control
• transient response

This paper presents a new buck converter with optimum-damping and dynamic-slope compensation techniques. The optimum-damping control is a well-known current control method, and the proposed dynamic-slope generator can achieve frequency compensation to prevent subharmonic oscillation. When the system is disturbed, the proposed dynamic-slope generator can stabilize the circuit in a single cycle. Hence, the dynamic-slope compensation can be used to replace traditional extra slope compensa-tion in the optimum-damping-control circuit. The measured transient time of the load current is 2 mu s from 50 to 500 mA, and 3 mu s from 500 to 50 mA. The optimum-damping-control techniques can rapidly reach desired output voltage in 2-3 switching cycles. The experimental and simulation re-sults confirm that the proposed approach can achieve the slope compensation and accelerate the transient response. The proposed converter has been fabricated with TSMC 0.18 mu m CMOS 1P6M technology. The converter's operating frequency is 1 MHz, the maximum output current is 500 mA, and the peak power efficiency is 89.68% under 300-mA load current. The chip area is only 1.0376 mm x 1.0599 mm (include PADs).

• 出版日期2017-3