Electricity: electrical systems and devices – Safety and protection of systems and devices – Voltage regulator protective circuits
Patent
1997-03-10
1998-10-06
Young, Brian K.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Voltage regulator protective circuits
361 79, 361 90, 363 21, H02H 700
Patent
active
058186700
ABSTRACT:
A switching mode power supply which controls power source supplied to electronic equipment, which is designed to protect a circuit against an overvoltage through a power line of coil or overcurrent on the occurrence of short-circuit of power line. The switching mode power supply of the present invention comprises a switching transformer for receiving DC voltage to a primary coil from a rectifier, and inducing respective different predetermined voltages into a plurality of coils on the secondary and third side of respective different turns ratio, an error detection and feedback for inputting the voltage V.sub.A of a coil with the highest turns ratio of a plurality of the coils and detecting voltage errors, a switching output for outputting a control signal so as to switch a switching transformer, a current sensor for sensing a current signal transmitted from the switching output, a pulse width modulation controller for inputting a voltage error fed back from the error detection and feedback and an output current from the current sensor and a voltage of the third coil, and outputting pulse width modulation signal which duty cycle is modulated in accordance with these input signals to the switching output, and an overvoltage and overcurrent protection circuit for detecting whether an overvoltage from a plurality of the coils occur, whether an undervoltage from a plurality of the coils occur or not, and continuously stopping an operation of pulse width modulation controller when detecting the overvoltage or the undervoltage.
REFERENCES:
patent: 4916569 (1990-04-01), Konopka
patent: 5124906 (1992-06-01), Kang
patent: 5448469 (1995-09-01), Rilly et al.
patent: 5633787 (1997-05-01), Song
Bushnell Esq. Robert E.
Samsung Electronics Co,. Ltd.
Sherry Michael J.
Young Brian K.
LandOfFree
Switching mode power supply with protection function against ove does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Switching mode power supply with protection function against ove, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switching mode power supply with protection function against ove will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-85560