发明名称 |
Switching regulator and control method |
摘要 |
The present invention relates to an information processing apparatus that comprises a plurality of electric circuits and that has power supply lines for the individual electric circuits. It provides a switching regulator that controls the power that is supplied by an external power source to such an information processing apparatus, while inhibiting power waste, and the information processing apparatus and a method for its control. The information processing apparatus, which is activated by power supplied from an external power source, comprises: a first power supply line for supplying power to a first electric circuitry; a second power supply line for supplying power to a second electric circuitry; a i-th power supply line for supplying power to a i-th electric circuitry (i is an integer of 1 </= i </= n, and n is an integer equal to 2 or greater); means for monitoring a first voltage of the first power supply line; means for monitoring a second voltage of the second power supply line; means for monitoring a i-th voltage of the i-th power supply line; means for selecting the minimum voltage among the first through the i-th voltages; means for comparing the minimum voltage with a previously given reference voltage; and connecting/disconnecting means for starting or halting the power supply from the external power source in response to the comparison result. As the lowest voltage can be used as a feedback target, the application of a high voltage is not required even if the safety of the system is taken into consideration and power will not be wasted. <MATH> |
申请公布号 |
EP0694826(A3) |
申请公布日期 |
1998.05.13 |
申请号 |
EP19950305186 |
申请日期 |
1995.07.25 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
NARITA, IZURU;IWAMI, TOMOYUKI |
分类号 |
G06F1/26;G05F1/56;G05F1/577;H02J7/34;H02M3/155;H02M3/335 |
主分类号 |
G06F1/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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