Feedback circuit and power supply device including the same
AssigneeFairchild Korea Semiconductor Ltd.
InventorsIn-Ki PARK, Won-Seok KANG, Gye-Hyun CHO
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Abstract
Disclosed are a feedback circuit and a power supply device including the same. The power supply device converts input voltage into output voltage suitable for load condition according to a switching operation of a power switch. The feedback circuit includes a first diode connected to a first sensing voltage corresponding to output voltage and a second diode connected to the output voltage. The feedback circuit generates feedback voltage by using voltage passing through a conducted diode of the first and the second diodes. The power supply device controls a switching operation of the power switch depending on the feedback voltage.
Claims17
A power supply device
- converting input voltage into output power according to a switching operation of a power switch, comprising:
- a feedback circuit which includes a first diode connected to a first sensing voltage corresponding to an output voltage of the output power and a second diode connected to the output voltage and generates feedback voltage by using voltage passing through a conducted diode of the first and the second diodes;
- and
- a switch controller controlling a switching operation of the power switch depending on the feedback voltage.
A feedback circuit
- supplying feedback voltage for controlling a switching operation in a power supply device converting input voltage into output power according to the switching operation of a power switch, comprising:
- a voltage feedback unit generating a first sensing voltage corresponding to output voltage of the output power,
- a first diode connected to the first sensing voltage, and
- a second diode connected to the output voltage,
- wherein feedback voltage is generated by using voltage passing through a conducted diode of the first and the second diodes.
Dependencies are inferred from the claim text.