| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To quickly detect a power failure and to turn off a load on the occurrence of the power failure of an alternating-current power supply for prolonging a period before resetting a microcomputer and continuing operation without losing progress of a program. <P>SOLUTION: A heating cooking device includes: a direct-current power supply obtained from the alternating-current power supply 21; a switching power supply 24 supplying a power source from the direct-current power supply to a load group a27; a low voltage power supply 28 to supply a power source from an output of the switching power supply 24 to the microcomputer 30 and a load group b31; a transistor 32 to supply a power source to the load group b31; and a power failure detection circuit 26 detecting a power failure based on an output voltage of the switching power supply 24. When the power failure detection circuit 26 detects a power failure, operation of the transistor 32 supplying electric power from an output of the low voltage power supply 28 to the load group b31 is stopped, and the microcomputer 30 detects that power supply to the load group b31 is stopped, and then, sets a load of the device to a non-driving state. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
