A Novel EA with Wide Dynamic Range for Small Settling Time PWM DC-DC Converter

摘要：

A novel error amplifier (EA) is proposed to obtain a large dynamic range as well as a fine-adjustment pulse width modulation (PWM).So the error voltages can be detected precisely. As a result,the output ripples are reduced,and the settling time of converter is extremely shortened. The proposed EA is designed and implemented by 0.002mm 36V bipolar process.For this EA,the simulation results show that,the open-loop and closed-loop gains are 61dB and 33dB respectively, the gain bandwidth (GBW) is achieved as high as 200MHz,and the slew rate is 640V/ms. The whole chip simulation results show that the peak-peak amplitude of the output ripples is less than 2.07mV and the settling time is 0.964ms,with the output voltage of 3.3V and the load current of 20mA.

关键词： EA PWM converter error voltage feedback

作者: Sun Guofei Wang Jia

作者单位: Institute of Computer,Northwestern Polytechnical University,Xian,China

会议类型: 国际会议

会议名称: 2009 International Conference on Information,Electronic and Computer Science(2009 国际信息、电子与计算机工程学术会议)

会议地点: 青岛

会议语种:英文

页码: 339-342

在线出版日期: 2009-11-21（万方平台首次上网日期，不代表论文的发表时间）