Control circuits, switching power supplies and electronics
A technology for controlling circuits and switching circuits, applied in high-efficiency power electronic conversion, control/regulation systems, electrical components, etc., can solve problems such as high power consumption and impact on energy efficiency certification, reduce total loss, increase standby time, reduce Effect of Standby Power Consumption
Active Publication Date: 2022-03-18
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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[0003] In the related art, the output voltage of the PFC circuit is a constant voltage, that is, the output voltage of the PFC circuit maintains a normal 400V output voltage regardless of the state of the electronic device with the built-in PFC circuit. Therefore, the output voltage of the PFC circuit is Resistors will generate losses, and their power consumption is high, which may even affect energy efficiency certification
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[0035] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.
[0036] It can be understood that the terms "first", "second" and the like used in this application may be used to describe various elements herein, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a first weld could be termed a second weld, and, similarly, a second weld could be termed a first weld, without departing from the scope of the present application. Both the first solder joint and the second solder joint are solder joints, but they are not the same solder joint.
[0037] I...
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The present application relates to a control circuit, switching power supply and electronic equipment, wherein the control circuit includes a first switch circuit, the control terminal of the first switch circuit is used to receive the control signal of the control system; the second switch circuit, the second switch circuit The control terminal is connected to the second end of the first switch circuit, and the first end of the second switch circuit is connected to the ground end of the PFC circuit; the voltage regulating circuit is connected to the second end of the PFC circuit, the second switch circuit, and the voltage regulating circuit respectively. The ground terminal of the PFC circuit is connected, wherein, the resistance value of the voltage regulation circuit is positively correlated with the output voltage; wherein, the first switch circuit and the second switch circuit are used to selectively turn on the control signal to the voltage regulation circuit under the control of the control signal The control path is used to adjust the resistance value of the voltage regulating circuit, so as to realize the regulation of the output voltage of the output terminal of the PFC circuit, thereby reducing the standby power consumption.
Description
technical field [0001] The present application relates to the technical field of wearable devices, in particular to a control circuit, a switching power supply and electronic equipment. Background technique [0002] A power factor correction (Power Factor Correction, PFC) circuit can boost an input voltage to an output voltage, and the output voltage is higher than the input voltage, and the output voltage is generally set to 400V. [0003] In the related art, the output voltage of the PFC circuit is a constant voltage, that is, the output voltage of the PFC circuit maintains a normal 400V output voltage regardless of the state of the electronic device with the built-in PFC circuit. Therefore, the output voltage of the PFC circuit is Resistors will generate losses, and their power consumption is high, which may even affect energy efficiency certification. Contents of the invention [0004] The embodiment of the present application provides a control circuit, a switching p...
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IPC IPC(8): H02M1/42H02M3/158
CPCH02M1/42H02M3/158Y02B70/10
Inventor 黄晓东
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD