US Patent Application 18302982. SWITCHING POWER SUPPLY CIRCUIT AND SWITCHING POWER SUPPLY DEVICE simplified abstract
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SWITCHING POWER SUPPLY CIRCUIT AND SWITCHING POWER SUPPLY DEVICE
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SWITCHING POWER SUPPLY CIRCUIT AND SWITCHING POWER SUPPLY DEVICE - A simplified explanation of the abstract
This abstract first appeared for US patent application 18302982 titled 'SWITCHING POWER SUPPLY CIRCUIT AND SWITCHING POWER SUPPLY DEVICE
Simplified Explanation
The patent application describes a switching power supply circuit that generates an output voltage using an output stage circuit consisting of an output transistor and a synchronous rectification transistor.
- The circuit includes an error amplifier that generates an error voltage based on the difference between a feedback voltage (corresponding to the output voltage) and a predetermined reference voltage.
- A slope voltage generation circuit generates a slope voltage, which is used in the comparison process.
- A comparator compares a first comparison voltage with a second comparison voltage, which is either the slope voltage or a sum of the slope voltage and a voltage corresponding to the inductor current.
- A clock signal generation circuit generates a clock signal that is used in controlling the output stage circuit.
- A control drive circuit controls the output stage circuit based on the clock signal and the comparison result signal from the comparator.
- A reverse current detection circuit is included to detect any reverse current in the inductor current.
Original Abstract Submitted
A switching power supply circuit includes an output stage circuit having an output transistor and a synchronous rectification transistor, and generates an output voltage. The switching power supply circuit includes an error amplifier to generate an error voltage corresponding to a difference between a feedback voltage corresponding to the output voltage and a predetermined reference voltage, a slope voltage generation circuit to generate a slope voltage, a comparator to generate a comparison result signal by comparing a first comparison voltage with a second comparison voltage which is the slope voltage or a sum of the slope voltage and a voltage corresponding to the inductor current, a clock signal generation circuit to generate a clock signal, a control drive circuit to control the output stage circuit based on the clock signal and the comparison result signal, and a reverse current detection circuit to detect a reverse current of the inductor current.
