Title :
A high-efficiency hysteresis buck converter using auto selectable frequency-locked techniques
Author :
Tse-Hsu Wu ; Jiann-Jong Chen ; Yuh-Shyan Hwang
Author_Institution :
Dept. of Electron. Eng., Nat. Taipei Univ. of Technol., Taipei, Taiwan
Abstract :
A high-efficiency wide workload hysteresis buck converter using auto selectable frequency-locked techniques is designed with the TSMC 0.18-μm 1P6M process. The proposed buck converter yields fast-response by using hysteresis control. The workload range, power efficiency, and EMI noise problem are improved by auto-selectable frequency and frequency-locked techniques. The selected switching frequency is determined with load current. Simulation results show that this buck converter´s switching frequency is locked at four frequencies for the load current between 10 and 400mA: 250k, 500k, 1M, and 2MHz. Furthermore, it achieves more than 90% power efficiency over 95% of the load range, with a peak efficiency of 96.27%.
Keywords :
electromagnetic interference; power convertors; EMI noise problem; TSMC IP6M process; auto selectable frequency-locked techniques; auto-selectable frequency; buck converter; current 10 mA; current 400 mA; fast-response; frequency 1 MHz; frequency 2 MHz; frequency 250 kHz; frequency 500 kHz; frequency-locked techniques; high-efficiency wide workload hysteresis buck converter; hysteresis control; load current; power efficiency; selected switching frequency; switching frequency; Frequency control; Frequency synchronization; Inductors; Switches; Hysteresis; buck converter; frequency-lock; selectable frequency;
Conference_Titel :
Electron Devices and Solid-State Circuits (EDSSC), 2013 IEEE International Conference of
Conference_Location :
Hong Kong
DOI :
10.1109/EDSSC.2013.6628215
