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CN-115663934-B - Charging circuit and notebook computer

CN115663934BCN 115663934 BCN115663934 BCN 115663934BCN-115663934-B

Abstract

The application discloses a charging circuit and a notebook computer, wherein the charging circuit comprises at least 2 charging interface modules, at least 2 path conduction modules, a first control module and a second control module, the first control module is used for determining a target charging interface module, then a first switching tube of the path conduction module corresponding to the target charging interface module is conducted according to a first control signal, so that a corresponding second switching tube is conducted, and when the second switching tube is conducted, a third switching tube and a fourth switching tube are also conducted, so that a power output end of the corresponding charging interface module is conducted with the fourth switching tube, a battery to be charged is conducted with the third switching tube, so that the battery to be charged is conducted with the power output end of the corresponding charging interface module, and the power output end of the corresponding charging interface module can output voltage to the battery to be charged, so that charging is performed.

Inventors

  • HE XUANZE
  • Cao Yalian
  • TAI DECHUN

Assignees

  • 深圳英众世纪智能科技有限公司

Dates

Publication Date
20260512
Application Date
20220913

Claims (10)

  1. 1. A charging circuit, comprising: At least 2 charging interface modules; the path conducting modules are equal in number and correspond to the charging interface modules one by one; the first control module is respectively connected with each charging interface module, is also respectively connected with each path conduction module, and is used for determining a target charging interface module from at least 2 charging interface modules and outputting a first control signal to the path conduction module corresponding to the target charging interface module; the second control module is connected with the first control module, is connected with each path conduction module and is used for outputting a second control signal to the path conduction module corresponding to the target charging interface module; each path conducting module comprises a first switching tube, a second switching tube, a third switching tube and a fourth switching tube, wherein the first switching tube is respectively connected with the first control module and the second switching tube, and the first switching tube is used for conducting or cutting off according to the first control signal of the first control module; the second switching tube is respectively connected with the third switching tube, the fourth switching tube and the second control module, and when the first switching tube is conducted, the second switching tube is used for being conducted or cut off according to the second control signal of the second control module; The third switching tube is respectively connected with the power output end of the corresponding charging interface module and the fourth switching tube, and is used for switching on or switching off the power output end of the corresponding charging interface module and the fourth switching tube; The fourth switching tube is used for being connected with a battery to be charged, and the fourth switching tube is used for enabling the battery to be charged and the third switching tube to be connected or disconnected.
  2. 2. The charging circuit of claim 1, wherein a gate of the first switching tube is connected to the first control module, a source of the first switching tube is grounded, and a drain of the first switching tube is connected to a source of the second switching tube.
  3. 3. The charging circuit of claim 2, wherein a gate of the second switching tube is connected to the second control module, and a drain of the second switching tube is connected to a gate of the third switching tube and a gate of the fourth switching tube, respectively.
  4. 4. The charging circuit of claim 3, wherein a drain electrode of the third switching tube is connected to a power output end of the corresponding charging interface module, a source electrode of the third switching tube is connected to a source electrode of the fourth switching tube, a gate electrode of the fourth switching tube is connected to a gate electrode of the third switching tube, a gate electrode of the fourth switching tube is connected to a drain electrode of the second switching tube through a first resistor, a source electrode of the third switching tube is connected to a source electrode of the fourth switching tube through a second resistor, and a drain electrode of the fourth switching tube is connected to the battery to be charged.
  5. 5. The charging circuit of claim 4, wherein the first resistor has a resistance of one third of the resistance of the second resistor.
  6. 6. The charging circuit of claim 4, further comprising a first capacitor, the first resistor being further connected between the source of the third switching tube and the source of the fourth switching tube via the first capacitor, the first capacitor being in parallel with the second resistor.
  7. 7. The charging circuit of claim 2, wherein the gate of the first switching tube is connected to the first control module through a third resistor.
  8. 8. A charging circuit according to claim 3, wherein the gate of the second switching tube is connected to the second control module via a fourth resistor.
  9. 9. The charging circuit of claim 4, further comprising a second capacitor, wherein a drain of the third switching tube is grounded to a corresponding power output terminal of the charging interface module through the second capacitor.
  10. 10. A notebook computer, comprising: The charging circuit of any one of claims 1 to 9.

Description

Charging circuit and notebook computer Technical Field The present application relates to the field of charging technologies, and in particular, to a charging circuit and a notebook computer. Background Currently, more and more devices are provided with a plurality of TYPEC interfaces at the same time, but when a plurality of TYPEC interfaces are plugged into corresponding power adapters at the same time, a conflict occurs, and the devices in the related art are not charged, even burn-in occurs. Disclosure of Invention The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a charging circuit and a notebook computer, wherein when a plurality of charging interfaces are inserted into an adapter, one charging interface module can be selected from a plurality of charging interface modules for charging. In a first aspect, an embodiment of the present application provides a charging circuit, including: At least 2 charging interface modules; the path conducting modules are equal in number and correspond to the charging interface modules one by one; the first control module is respectively connected with each charging interface module, is also respectively connected with each path conduction module, and is used for determining a target charging interface module from at least 2 charging interface modules and outputting a first control signal to the path conduction module corresponding to the target charging interface module; the second control module is connected with the first control module, is connected with each path conduction module and is used for outputting a second control signal to the path conduction module corresponding to the target charging interface module; each path conducting module comprises a first switching tube, a second switching tube, a third switching tube and a fourth switching tube, wherein the first switching tube is respectively connected with the first control module and the second switching tube, and the first switching tube is used for conducting or cutting off according to the first control signal of the first control module; the second switching tube is respectively connected with the third switching tube, the fourth switching tube and the second control module, and when the first switching tube is conducted, the second switching tube is used for being conducted or cut off according to the second control signal of the second control module; The third switching tube is respectively connected with the power output end of the corresponding charging interface module and the fourth switching tube, and is used for switching on or switching off the power output end of the corresponding charging interface module and the fourth switching tube; The fourth switching tube is used for being connected with a battery to be charged, and the fourth switching tube is used for enabling the battery to be charged and the third switching tube to be connected or disconnected. The charging circuit has the advantages that when at least 2 charging interface modules are connected to an external adapter, the first control module is used for determining a target charging interface module from at least 2 charging interface modules, outputting a first control signal to the path conduction module corresponding to the target charging interface module, so that the corresponding first switching tube is conducted according to the first control signal, meanwhile, the second control module outputs a second control signal to the path conduction module corresponding to the target charging interface module, the first switching tube of the path conduction module corresponding to the target charging interface module is conducted according to the first control signal, so that the corresponding second switching tube is conducted, and when the second switching tube is conducted, the second switching tube is also used for conducting the third switching tube and the fourth switching tube, so that a power output end of the corresponding charging interface module is conducted between a battery to be charged and the fourth switching tube, and a battery to be charged is conducted between the battery to be charged and the power output end of the corresponding charging interface module, and the power output end of the corresponding charging interface module to be charged can be conducted to the battery to be charged, and the voltage to be charged. According to some embodiments of the first aspect of the present application, a gate of the first switching tube is connected to the first control module, a source of the first switching tube is grounded, and a drain of the first switching tube is connected to a source of the second switching tube. According to some embodiments of the first aspect of the present application, a gate of the second switching tube is connected to the second control module, and a drain of the second switching tube is connected to a