SEMICONDUCTOR DEVICE FOR SWITCHING POWER SUPPLY CONTROL

• Main Author: YAMASHITA TETSUJI
• Format: Patent
• Language: English
• Published: 19.09.2003
• Edition: 7
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

PROBLEM TO BE SOLVED: To provide a semiconductor device for a switching power supply control, capable of preventing a switching power supply unit from being destroyed, by stopping switching operations and keeping the stopping conditions if no acquirement of a feedback signal for controlling the switching operations of the switching device causes no flow-out of current from a control terminal. SOLUTION: This semiconductor device includes a control terminal open protective circuit 10, which makes an overvoltage protective circuit 8 operate by raising the voltage of the control terminal 26 to a prescribed voltage value and keeps the stopping condition of switching operations with the overvoltage protective circuit 8. COPYRIGHT: (C)2003,JPO