Single-ended switching converter
AssigneeTokyo Shibaura Denki Kabushiki Kaisha
InventorsToshihiro Onodera, Youichi Masuda, Akira Nakajima
Life of this patent
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Abstract
A series circuit of a transistor serving as a switching element and an input power supply is connected in parallel with the primary side inductor of a transformer. A resonance capacitor and a damping diode are connected in parallel with the transistor. When the transistor is turned on in response to a pulse signal supplied from a pulse generator, the current from a DC power supply is supplied to the transformer. At the same time, a commutating diode is turned on to supply the output current from the transformer to a load resistor.
Claims14
A single-ended switching converter comprising:
- a. a transformer having primary side inputs, secondary side outputs, and a primary inductance L.sub.1 and a leakage inductance L.sub.2 satisfying the condition:
- L.sub.1 /10.ltoreq.L.sub.2 ;
- b. switching means connected to the primary side inputs of said transformer for performing on-off operation according to a predetermined signal, said switching means supplying current from a DC power supply to said transformer when said switching means is in the "on" state;
- c. a capacitor connected in parallel with said switching means and having a predetermined capacitance;
- d. first means connected in parallel with said switching means to be conductive when the potential on one terminal of said capacitor becomes a predetermined potential, for preventing the potential on said one terminal of said capacitor from becoming lower than said predetermined potential;
- and
- e. second means connected to one of said secondary side outputs of said transformer to be conductive during the "on" state of said switching means, for supplying a load with power generated from the DC power supply, said load being connected between said second means and another secondary side output of said transformer.
A single-ended switching converter comprising:
- a. a transformer having a primary side input, a secondary side input, and a primary inductance and a leakage inductance;
- b. inductor means connected to said transformer for keeping said leakage inductance of said transformer greater than a predetermined value;
- c. switching means connected to said primary side input of said transformer for performing on-off operation according to a predetermined signal, said switching means supplying current from a DC power supply to said transformer when said switching means is in the "on" state;
- d. a capacitor connected in parallel with said switching means and having a predetermined capacitance;
- e. first diode means connected in parallel with said switching means to be conducted when the potential on one terminal of said capacitor becomes a predetermined potentional, for preventing the potential on said one terminal of said capacitor from becoming lower than said predetermined potential;
- and
- f. second diode means connected to the secondary side output of said transformer to be conductive during the "on" state of said switching means, for supplying a load with power generated from said DC power supply.
Dependencies are inferred from the claim text.