Title:
電源システム
Document Type and Number:
Japanese Patent JP3972856
Kind Code:
B2
Abstract:
A power system causes no variation in output voltage during switching from a linear regulator to a DC-DC converter. The power system switches off a drive circuit of a DC-DC converter and supplies voltage to a load from a linear regulator if the load is light, while the power system halts voltage supply to the load from the linear regulator and switches the drive circuit of the DC-DC converter on if the load is heavy. During a set period of time after the load changes from light to heavy, the linear regulator continues to supply voltage to the load while the DC-DC converter supplies a pseudo feedback signal to a control circuit in place of a feedback signal, with the drive circuit left off to control the time ratio at switching elements and, thus minimizing output voltage variations.
Inventors:
Hidenori Kobayashi
Application Number:
JP2003111277A
Publication Date:
September 05, 2007
Filing Date:
April 16, 2003
Export Citation:
Assignee:
Fuji Electric Holdings Co., Ltd.
International Classes:
G05F1/56; H02M3/155; H02M3/158
Domestic Patent References:
| JP2001021640A | ||||
| JP2002300769A | ||||
| JP2002078342A |
Attorney, Agent or Firm:
Takeshi Hattori