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Patent Searching and Data


Title:
SWITCHING REGULATOR
Document Type and Number:
Japanese Patent JPS5980161
Kind Code:
A
Abstract:
PURPOSE:To completely stop an oscillation at the stopping time by operating a thyristor provided therein for protecting against an overvoltage even at the stopping time of the entire operation. CONSTITUTION:When a light emitting diode LED1 of a power source controller 4 emit a light, a phototransistor Q3 is turned ON, a switching transistor Q9 continues switching, and an output is provided at the secondary side of a transformer T2. When the output voltage of the switching transformer T2 tends to exceed the prescribed value, a thyristor SCR is triggered, thereby absorbing the energy at the output side, and the switching of the trasistor Q9 is stopped. A thyristor SCR for protecting against an overvoltage is operated also as a stopping circuit at the time of stopping a switching regulator 2. In other words, the thyristor SCR is turned On simultaneously upon stopping of a starting circuit which has transistors Q5, Q6, a current is flowed from the coil L5, and energy stored in the primary coil L8 is lost.

Inventors:
HANABUSA TOSHIO
Application Number:
JP18677682A
Publication Date:
May 09, 1984
Filing Date:
October 26, 1982
Export Citation:
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Assignee:
GEN CORP
International Classes:
G11B33/00; H02M3/28; H02M3/335; (IPC1-7): G11B5/00