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US 6,208,533 B1Granted
Switching power supply for stabilizing a DC output voltage
AssigneeFunai Electric Co., Ltd.
InventorTakahiro Ogawa
Life of this patent
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Abstract
A switching power supply to stabilize the voltage of a DC output by controlling the switching of a switching transistor according to a voltage error of the DC output. In the switching power supply, when the switching transistor carries out the intermittent switching, the maximum value of the current flowing through a primary coil is limited to a current value smaller than the maximum value of the current determined corresponding to the output of an error detection circuit.
Claims4
A switching power supply comprising:
- a switching transistor for switching a current flowing through a primary coil wound around a transformer;
- a rectifying and smoothing circuit for rectifying and smoothing an output of a secondary coil wound around the transformer;
- and
- an error detection circuit for detecting a voltage error of a DC output sent from the rectifying and smoothing circuit,
- wherein a voltage of the DC output is stabilized by controlling the switching of the switching transistor according to an output of the error detection circuit, and
- wherein when the switching transistor conducts an intermittent switching, a maximum value of the current flowing through the primary coil is limited to a current value smaller than a maximum value of a current determined corresponding to the output of the error detection circuit.
3 more elements
Dependencies are inferred from the claim text.