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CN-224233340-U - Current limiting control circuit and hub

CN224233340UCN 224233340 UCN224233340 UCN 224233340UCN-224233340-U

Abstract

The application relates to a current limiting control circuit and a hub, wherein the current limiting control circuit comprises a current limiting chip, a first branch, at least one second branch, a second branch and a first resistor, wherein the output end of the current limiting chip is connected with at least one target port, the two ends of the first branch are respectively connected with a current limiting pin and ground of the current limiting chip, the first branch comprises the first resistor, the second branch is connected between the current limiting pin and the ground in parallel with the first branch, the second branch comprises a gating module and a second resistor which are connected in series, the first end of the gating module is connected with an enabling control pin of the current limiting chip, the second end and the third end of the gating module are respectively connected with the second resistor and ground, and the current limiting chip is used for adjusting current output to the target port by controlling on-off of the gating module. Thus, the second resistor is flexibly controlled to be connected through the gating module, and the current output to the port is flexibly adjusted.

Inventors

  • WANG JIALIANG

Assignees

  • 安克创新科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250424

Claims (10)

  1. 1. A current limit control circuit, the circuit comprising: The output end of the current limiting chip is connected with at least one target port; The current limiting circuit comprises a current limiting chip, a first branch circuit, a second branch circuit and a second branch circuit, wherein two ends of the first branch circuit are respectively connected with a current limiting pin of the current limiting chip and ground, and the first branch circuit comprises a first resistor; The second branch circuit comprises a gating module and a second resistor which are connected in series, wherein a first end of the gating module is connected with an enabling control pin of the current limiting chip, and a second end and a third end of the gating module are respectively connected with the second resistor and the ground; the current limiting chip is used for adjusting the current output to the target port by controlling the on-off of the gating module.
  2. 2. The circuit of claim 1, wherein the gating module is a triode or a metal-oxide semiconductor field effect transistor MOSFET, and wherein the first end of the gating module is a base of the triode or a gate of the MOSFET.
  3. 3. The circuit of claim 1, wherein when the circuit includes a plurality of second branches, the resistance values of the second resistors in different second branches are different; The current limiting chip is used for controlling the gating module of the second branch to be conducted through an output enabling signal, and reducing the current value of the current output to the target port when the resistance value of the second resistor in the second branch is larger than a preset value; The current limiting chip is used for controlling the gating module of the second branch to be conducted through an output enabling signal, and increasing the current value of the current output to the target port when the resistance value of the second resistor in the second branch is smaller than a preset value.
  4. 4. The circuit of claim 1, further comprising a first detection module, wherein the current limiting chip is connected to the target port through the first detection module, and wherein the current limiting chip is configured to control the gating module of the second branch to be turned on through an output enable signal when the first detection module detects that the target port has no access to a device.
  5. 5. The circuit of claim 1, further comprising a second detection module; The current limiting chip is also connected with the second detection module, and is used for controlling the gating module of the second branch to be conducted through an output enabling signal when a preset operation is detected through the second detection module.
  6. 6. The circuit of claim 1, wherein the destination port is a data port.
  7. 7. The circuit of claim 1, wherein the current limiting chip is a micro-control unit or a proportional-derivative controller.
  8. 8. The circuit of claim 1, wherein the current limit control circuit comprises a plurality of the current limit chips, each of the current limit chips connecting the first branch and at least one of the second branches.
  9. 9. A hub, characterized in that it comprises at least one destination port, and a current limiting control circuit according to any of claims 1 to 8.
  10. 10. The hub of claim 9, wherein one of said destination ports is connected to a plurality of said current limit control circuits, and wherein a plurality of said current limit control circuits are connected in parallel.

Description

Current limiting control circuit and hub Technical Field The present application relates to the field of electronic devices, and in particular, to a current limiting control circuit and a hub. Background When the hub product is designed, the data port needs external equipment, so the output power of the fixed port in the hub can be deducted from the input power preferentially, the power consumption of the main board is deducted, and the rest power is used for charging the equipment. Especially in complex hub products, due to the large number of data ports, the total power is added up to a large amount, and if not every port is used, if the ports are pre-buckled according to fixed power, a relatively large power adapter needs to be configured or the charging power cannot meet the requirement. Disclosure of utility model The application provides a current limiting control circuit and a hub, which are used for solving the technical problem of larger power loss. The application provides a current limiting control circuit which comprises a current limiting chip, a first branch, at least one second branch and a second branch, wherein the output end of the current limiting chip is connected with at least one target port, the two ends of the first branch are respectively connected with a current limiting pin and ground of the current limiting chip, the first branch comprises a first resistor, the second branch is connected between the current limiting pin and the ground in parallel with the first branch, the second branch comprises a gating module and a second resistor which are connected in series, the first end of the gating module is connected with an enabling control pin of the current limiting chip, the second end and the third end of the gating module are respectively connected with the second resistor and ground, and the current limiting chip is used for adjusting current output to the target port by controlling on-off of the gating module. In one possible implementation, the gating module is a triode or a metal-oxide semiconductor field effect transistor MOSFET, and the first end of the gating module is the base of the triode or the gate of the MOSFET. In one possible implementation manner, when the circuit comprises a plurality of second branches, the resistance values of second resistors in different second branches are different, the current limiting chip is used for controlling the gating module of the second branch to be conducted through an output enabling signal, and when the resistance value of the second resistor in the second branch is larger than a preset value, the current value of the current output to the target port is reduced, and when the resistance value of the second resistor in the second branch is smaller than the preset value, the current limiting chip is used for controlling the gating module of the second branch to be conducted through the output enabling signal, and the current value of the current output to the target port is increased. In one possible implementation manner, the circuit further comprises a first detection module, the current limiting chip is connected with the target port through the first detection module, and the current limiting chip is used for controlling the gating module of the second branch to be conducted through an output enabling signal when the first detection module detects that the target port is not connected with equipment. In one possible implementation mode, the circuit further comprises a second detection module, and the current limiting chip is further connected with the second detection module and is used for controlling the gating module of the second branch to be conducted through an output enabling signal when a preset operation is detected through the second detection module. In one possible implementation, the destination port is a data port. In one possible implementation, the current limiting chip is a Micro Control Unit (MCU) or a proportional-derivative (PD) controller. In one possible implementation, the current limiting control circuit comprises a plurality of current limiting chips, and each current limiting chip is connected with the first branch and at least one second branch. In a second aspect, the present application provides a hub comprising at least one destination port, and a current limit control circuit as described in any of the preceding first aspects. In one possible embodiment, one of the target ports is connected to a plurality of the current limiting control circuits, and the plurality of current limiting control circuits are connected in parallel. Compared with the prior art, the current limiting control circuit provided by the embodiment of the application has the advantages that the current limiting control circuit comprises a current limiting chip, a first branch, at least one second branch and a second branch, wherein the output end of the current limiting chip is connected with at least one target port, the two