DC/DC CONVERTER AND CONTROL METHOD FOR THE SAME,申请号JP20090145541-传众专利搜索

DC/DC CONVERTER AND CONTROL METHOD FOR THE SAME

申请公布号：JP2011004517(A)

申请号：JP20090145541

申请日期：2009.06.18

申请公布日期：2011.01.06

申请人：

FUJITSU SEMICONDUCTOR LTD

发明人：YOSHINO TAKAHIRO

分类号：H02M3/155

主分类号：H02M3/155

摘要：PROBLEM TO BE SOLVED: To provide a DC/DC converter which stabilizes a constant output voltage by increasing a response speed to a fluctuation in an output voltage while improving an accuracy of a constant output voltage.SOLUTION: The DC/DC converter is equipped with: a first comparator 5 for comparing an output voltage Vout with a reference voltage Vref; a pulse generation circuit 6 for generating a pulse signal having a constant time width by using the output signal of the first comparator as a trigger; a first switching circuit 1 to be opened/closed based on the pulse signal; output voltage generating parts 2, 3, 4 for generating the output voltage Vout based on the input voltage Vin supplied through the first switching circuit; a delay generating circuit 11 for outputting the output signal of the first comparator 5 with a delay; and an error amplifier 7 for controlling the delay time of the delay generating circuit 11, based on the potential difference between the output voltage Vout and the reference voltage Vref.