| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a chopper regulator circuit which facilitates proper power feeding to both loads while suppressing the enlargement or the like of a device to the utmost. <P>SOLUTION: The chopper regulator circuit comprises: a power output part which outputs power to the first load or the second load; a first output detection part which detects an output to the first load; a second output detection part which detects an output to the second load; first and second reference voltage generation parts; an output control part which controls a power output amount on the basis of a comparison result of two input voltages; and a switch control part for controlling the switching of the first load and the second load either of which should be fed with power, and the switching of the two input voltages. The chopper regulator circuit is also constituted in such a manner that, at the switching of the input voltages, a detected voltage at the first output detection part and a reference voltage at the first reference voltage generation part are made to be the input voltages when feeding power to the first load, and on the other hand, when feeding power to the second load, a detected voltage at the second output detection part and a reference voltage at the second reference voltage generation part are made to be the input voltages. <P>COPYRIGHT: (C)2008,JPO&INPIT |
