Search

CN-224233567-U - Voltage power conversion circuit and electronic equipment

CN224233567UCN 224233567 UCN224233567 UCN 224233567UCN-224233567-U

Abstract

The application discloses a voltage power conversion circuit and electronic equipment, wherein the voltage power conversion circuit comprises a rectification circuit, a voltage conversion circuit and a power conversion circuit, wherein the rectification circuit is used for rectifying input voltage to obtain first voltage, the voltage conversion circuit is electrically connected with the rectification circuit and is used for receiving the first voltage and converting the first voltage to output second voltage, and the power conversion circuit is electrically connected with the rectification circuit and the voltage conversion circuit respectively and is used for receiving the first voltage or the second voltage and inverting the first voltage or the second voltage. By the mode, the power device is reduced, the cost is reduced, and the miniaturization and high-power density design are realized.

Inventors

  • ZHANG GUICHEN

Assignees

  • 安克创新科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250508

Claims (13)

  1. 1. A voltage power conversion circuit, comprising: The rectification circuit is used for rectifying the input voltage to obtain a first voltage; The voltage conversion circuit is electrically connected with the rectification circuit and is used for receiving the first voltage and outputting a second voltage after transforming the first voltage; And the power conversion circuit is electrically connected with the rectifying circuit and the voltage conversion circuit respectively and is used for receiving the first voltage or the second voltage and inverting the first voltage or the second voltage.
  2. 2. The voltage-to-power conversion circuit of claim 1, wherein the voltage conversion circuit is turned on and the rectifier bridge of the rectifier circuit is turned off when the input voltage is less than the second voltage, the power conversion circuit receiving the second voltage; When the input voltage is larger than the second voltage, the voltage conversion circuit is turned off, the rectifier bridge of the rectifier circuit is turned on, the first voltage is equal to the input voltage, and the power conversion circuit receives the first voltage.
  3. 3. The voltage to power conversion circuit of claim 2, further comprising a processor configured to obtain a maximum value of the second voltage, a first conduction angle corresponding to the maximum value of the second voltage, a minimum value of the second voltage, a second conduction angle corresponding to the minimum value of the second voltage, and subtracting the second conduction angle from the first conduction angle to obtain the conduction angle of the rectifier bridge.
  4. 4. A voltage to power conversion circuit according to claim 3, wherein when the input voltage is less than the second voltage, the voltage conversion circuit is turned on, the voltage conversion circuit being configured to process a first output power, the first output power being a ratio of a conduction angle of the rectifier bridge to a peripheral rate multiplied by an output power of the rectifier circuit.
  5. 5. The voltage to power conversion circuit of claim 1, wherein a first input of the voltage conversion circuit is electrically connected to a first output of the rectifier circuit, the first input of the power conversion circuit being electrically connected to the first output of the rectifier circuit and the first output of the voltage conversion circuit, respectively; The voltage conversion circuit comprises a voltage reduction circuit and a first diode, wherein a first end of the voltage reduction circuit is electrically connected with a first output end of the rectifying circuit, a second end of the voltage reduction circuit is electrically connected with an anode of the first diode, a cathode of the first diode is electrically connected with a first input end of the power conversion circuit, and the voltage reduction circuit is used for reducing the first voltage and then outputting a second voltage.
  6. 6. The voltage to power conversion circuit of claim 1, wherein a first input of the voltage conversion circuit is electrically connected to a first output of the rectifier circuit, the first input of the power conversion circuit being electrically connected to the first output of the rectifier circuit and the first output of the voltage conversion circuit, respectively; The voltage conversion circuit comprises a voltage reduction circuit and a first diode, wherein a first end of the voltage reduction circuit is electrically connected with a first output end of the rectifying circuit, a second end of the voltage reduction circuit is electrically connected with a first input end of the power conversion circuit, a third end of the voltage reduction circuit is electrically connected with a negative electrode of the first diode, an anode of the first diode is grounded, and the voltage reduction circuit is used for outputting a second voltage after reducing the first voltage.
  7. 7. The voltage power conversion circuit according to claim 5 or 6, wherein the first diode is turned on when the first voltage is smaller than the second voltage, the power conversion circuit receiving the second voltage from the first diode; When the first voltage is greater than the second voltage, the first diode is turned off, and the power conversion circuit receives the first voltage from the rectifying circuit.
  8. 8. A voltage to power conversion circuit according to claim 5 or 6, wherein a second input of the voltage conversion circuit is electrically connected to a second output of the rectifying circuit, and wherein a second input of the power conversion circuit is electrically connected to a second output of the voltage conversion circuit.
  9. 9. The voltage to power conversion circuit of claim 5, wherein the step-down circuit comprises a first switching tube, a second diode, a first inductor and a first capacitor, wherein a first end of the first switching tube is electrically connected to the controller, a second end of the first switching tube is electrically connected to one end of the first capacitor, a third end of the first switching tube is electrically connected to one end of the first inductor, the other end of the first inductor is electrically connected to an anode of the first diode, a cathode of the second diode is electrically connected between the first switching tube and the first inductor, an anode of the second diode is grounded, one end of the first capacitor is electrically connected between the first inductor and the first diode, and the other end of the first capacitor is grounded.
  10. 10. The voltage-to-power conversion circuit of claim 6, wherein the buck circuit comprises a first switching tube, a second diode, a first inductor and a first capacitor, wherein a first end of the first switching tube is electrically connected with the controller, a second end of the first switching tube is electrically connected with an anode of the second diode, a third end of the first switching tube is grounded, a cathode of the second diode is electrically connected with one end of the first capacitor, one end of the first capacitor is electrically connected with a first input end of the power conversion circuit, the other end of the first capacitor is electrically connected with a cathode of the first diode, one end of the first inductor is electrically connected between the first switching tube and the second diode, and the other end of the first inductor is electrically connected between the first diode and the first capacitor.
  11. 11. The voltage to power conversion circuit of claim 10, further comprising a filter circuit having a first output electrically connected to the first input of the rectifier circuit and a second output electrically connected to the second input of the rectifier circuit, the filter circuit configured to filter the input voltage for electromagnetic compatibility.
  12. 12. The voltage to power conversion circuit of claim 11, wherein the rectifier circuit comprises a rectifier bridge and a second capacitor, a first end of the rectifier bridge is electrically connected to the first output end of the filter circuit, a second end of the rectifier bridge is electrically connected to the second output end of the filter circuit, a third end of the rectifier bridge is electrically connected to the first ends of the power conversion circuit and the second capacitor, a fourth end of the rectifier bridge is grounded, a second end of the second capacitor is grounded, and a ground end of the other end of the first capacitor is grounded to the ground end of the power conversion circuit and the fourth end of the rectifier bridge, respectively.
  13. 13. An electronic device comprising a voltage power conversion circuit according to any of claims 1-12.

Description

Voltage power conversion circuit and electronic equipment Technical Field The present application relates to the field of power technologies, and in particular, to a voltage power conversion circuit and an electronic device. Background With the wide application of the intelligent fast charging technology in consumer electronic devices such as smart phones and tablet computers, the continuous update of the power transmission protocol (USB Power Delivery, USB PD) standard promotes the continuous increase of the fast charging power. However, when the power exceeds 75W, the requirements of the relevant regulations on current harmonics become more stringent. To meet these regulatory requirements, conventional fast-charging schemes typically employ a two-stage power conversion architecture, namely a power factor correction (Power Factor Correction, PFC) power stage and a direct current to direct current conversion (Direct current to Direct current converter, DC/DC) isolated power stage. Although the traditional fast charging scheme meets the requirements of power factor correction and current harmonic wave to a certain extent, the hardware circuit is complex, the number of power devices is large, the cost is high, and miniaturization and high power density design are difficult to realize. Disclosure of utility model The application mainly provides a voltage power conversion circuit and electronic equipment, and solves the problem that the traditional fast charging scheme is difficult to realize miniaturization and high power density. The application provides a voltage power conversion circuit, comprising: The rectification circuit is used for rectifying the input voltage to obtain a first voltage; The voltage conversion circuit is electrically connected with the rectification circuit and is used for receiving the first voltage and outputting a second voltage after transforming the first voltage; And the power conversion circuit is electrically connected with the rectifying circuit and the voltage conversion circuit respectively and is used for receiving the first voltage or the second voltage and inverting the first voltage or the second voltage. When the input voltage is smaller than the second voltage, the voltage conversion circuit is conducted, the rectifier bridge of the rectifier circuit is cut off, and the power conversion circuit receives the second voltage; When the input voltage is larger than the second voltage, the voltage conversion circuit is turned off, the rectifier bridge of the rectifier circuit is turned on, the first voltage is equal to the input voltage, and the power conversion circuit receives the first voltage. The voltage power conversion circuit further comprises a processor, wherein the processor is used for obtaining the maximum value of the second voltage, a first conduction angle corresponding to the maximum value of the second voltage, a minimum value of the second voltage, a second conduction angle corresponding to the minimum value of the second voltage, and subtracting the second conduction angle from the first conduction angle to obtain the conduction angle of the rectifier bridge. When the input voltage is smaller than the second voltage, the voltage conversion circuit is conducted, and the voltage conversion circuit is used for processing first output power, wherein the first output power is the ratio of the conduction angle of the rectifier bridge to the circumference ratio multiplied by the output power of the rectifier circuit. The first input end of the power conversion circuit is electrically connected with the first output end of the rectifying circuit and the first output end of the voltage conversion circuit respectively; The voltage conversion circuit comprises a voltage reduction circuit and a first diode, wherein a first end of the voltage reduction circuit is electrically connected with a first output end of the rectifying circuit, a second end of the voltage reduction circuit is electrically connected with an anode of the first diode, a cathode of the first diode is electrically connected with a first input end of the power conversion circuit, and the voltage reduction circuit is used for reducing the first voltage and then outputting a second voltage. The first input end of the power conversion circuit is electrically connected with the first output end of the rectifying circuit and the first output end of the voltage conversion circuit respectively; The voltage conversion circuit comprises a voltage reduction circuit and a first diode, wherein a first end of the voltage reduction circuit is electrically connected with a first output end of the rectifying circuit, a second end of the voltage reduction circuit is electrically connected with a first input end of the power conversion circuit, a third end of the voltage reduction circuit is electrically connected with a negative electrode of the first diode, an anode of the first diode is grounded, and the voltage re