Electronic switching power supply

Patent · Tue Jun 11 00:00:00 EDT 1985

OSTI ID:6498196

Schwarz, G; Bergk, G

An electronic switching power supply for supplying power to an electrical load from a variable voltage level AC or DC voltage source having first and second terminals, the power supply including a transformer having a primary coil and a secondary coil, a first terminal of the secondary coil being connected to the electrical load, a first transistor connected in series with the primary coil, a first diode connected in series with the secondary coil and the electrical load, a first capacitor connected between the base of the first transistor and a second terminal of the secondary coil, a second transistor, the collector-emitter line of which is connected across the voltage source, a first resistor connected between the first terminal of the secondary coil and the collector of the second transistor, a second resistor connected between the first terminal of the secondary coil and the emitter of the first transistor, and a discharge circuit connected between the first capacitor and the electrical load, whereby the first capacitor is electrically charged during a conducting phase of the first transistor, and during a subsequent blocking phase of the first transistor, the electrical load receives the charge built up in the first capacitor during the preceding conducting phase.

• Assignee: Braun Aktiengesellschaft (Germany, Federal Republic Of)
• Patent Number(s): US 4523139
• OSTI ID: 6498196
• Country of Publication: United States
• Language: English

Related Subjects

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42 ENGINEERING
420800 -- Engineering-- Electronic Circuits & Devices-- (-1989)
CAPACITORS
ELECTRIC COILS
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
POWER SUPPLIES
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
SWITCHING CIRCUITS
TRANSFORMERS
TRANSISTOR SWITCHING CIRCUITS
TRANSISTORS