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CN-122026553-A - Distributed power reduction circuit for desktop docking station and control method

CN122026553ACN 122026553 ACN122026553 ACN 122026553ACN-122026553-A

Abstract

The invention discloses a distributed power reduction circuit and a control method for a desktop docking station, wherein a protocol chip 1 and a protocol chip 2 are connected, a P1 detection line and a P2 detection line are connected between the protocol chip 1 and the protocol chip 2, when related signals are detected, power reduction configuration is carried out, the P1 detection line and the P2 detection line are in a low level by default, a C1 port, a C2 port, an A port and a C5 port are connected with the protocol chip 1, the C1 port, the C2 port and the A port are connected with the protocol chip 1, and through cooperative interaction of the double protocol chips and the P1 and the P2 detection lines, multiple designs of an NTC temperature sensor, a Bus switch and a sampling resistor are combined, so that full-scene refined power distribution is realized, each interface is ensured to be output according to the maximum rated power efficiently when a single port is accessed, power is dynamically adjusted under a multi-port simultaneous access or over-temperature scene, the total output is ensured not to exceed the rated power of a previous AC-DC charger all the time, and restarting, shutdown or charging interruption of the equipment is avoided.

Inventors

  • LIU HAI
  • CHEN ZHEN

Assignees

  • 湖州镓奥科技有限公司
  • 深圳镓奥科技有限公司

Dates

Publication Date
20260512
Application Date
20260114

Claims (10)

  1. 1. A distributed power reduction circuit for a desktop docking station, comprising: The power-down configuration is carried out after the related signals are detected, and the P1 detection line and the P2 detection line are in a low level by default; The device comprises a C1 port, a C2 port, an A port and a C5 port, wherein the C1 port, the C2 port and the A port are connected with a protocol chip 1, the C5 port is connected with a protocol chip 2, and when equipment is inserted into the C5 port, the protocol chip 2 sends a high-level signal to the protocol chip 1 through a P1 detection line; And the charging plate comprises a front-stage AC-DC charger, the protocol chip 1 detects the temperature of the front-stage AC-DC charger through an NTC sensor, and when an over-temperature signal is detected, the protocol chip 1 sends a high-level signal to the protocol chip 2 through a P2 detection line.
  2. 2. The distributed power reduction circuit for a desktop docking station of claim 1, wherein sources of Bus switches Q13, Q23, QA3 and Q53 are respectively connected to the C1 port, the C2 port, the A port and the C5 port, sources and grids of the Bus switches Q13, Q23 and QA3 are further connected with a protocol chip 1, and sources of the Bus switches Q53 are further connected with the protocol chip 2.
  3. 3. The distributed power reduction circuit for a desktop docking station of claim 1, wherein sampling resistors R11, R21, RA1 and R51 are further connected to the C1 port, the C2 port, the A port and the C5 port respectively, two ends of the sampling resistors R11, R21 and RA1 are further connected to the protocol chip 1, and two ends of the sampling resistor R51 are further connected to the protocol chip 2.
  4. 4. The distributed power reduction circuit for a desktop docking station of claim 1, wherein said C1 port is connected to a D1+ pin and a D1-pin of a protocol chip 1; The C2 port is connected with a D2-pin and a D2+ pin of the protocol chip 1; the C5 port is connected with a D5-pin and a D5+ pin of the protocol chip 2.
  5. 5. The control method of the power down circuit according to any one of claims 1 to 4, wherein: s1, detecting equipment access states of a C1 port, a C2 port, a C5 port and an A port in real time; s2, level signals are transmitted through a P1 detection line and a P2 detection line, so that state interaction between the protocol chip 1 and the protocol chip 2 is realized; S3, distributing the output power of each interface according to the interface access state and the level signals of the P1 and P2 detection lines and a preset power reduction configuration table, so that the total output power of all the access interfaces does not exceed the rated power of the front-stage AC-DC charger, and restarting or shutdown of the front-stage AC-DC charger is avoided.
  6. 6. The control method according to claim 5, wherein in the step S2, if the C5 interface has a device inserted, the protocol chip 2 switches the level of the P1 detection line from low level to high level and sends the signal to the protocol chip 1; If the protocol chip 1 detects that the pre-stage AC-DC charger is over-temperature through the NTC sensor, the protocol chip 1 switches the level of the P2 detection line from low level to high level and sends the P2 detection line to the protocol chip 2.
  7. 7. The control method according to claim 5, wherein the rated power of the front-stage AC-DC charger is 160W; the maximum output of the C1 port and the C2 port is 140W, and PDO gears are 5V/3A,9V/3A, 12V/3A,15V/3A,20V/5A and 28V/5A; the maximum output of the port A is 12W, and the gear is 5V/2.4A; The maximum output of the C5 port is 100W, and the gears are 5V/3A,9V/3A,12V/3A,15V/3A and 20V/5A.
  8. 8. The control method according to claim 5, wherein the preset power-down configuration rule includes the following single-port access scenarios: when only the C1 interface is accessed, the output power of the C1 interface is 140W, and the total output power is 140W; When only the C2 interface is accessed, the output power of the C2 interface is 140W, and the total output power is 140W; When only the port A is accessed, the output power of the port A is 12W, and the total output power is 12W; When only the C5 interface is accessed, the output power of the C5 interface is 100W, and the total output power is 100W.
  9. 9. The control method according to claim 5, wherein the preset power-down configuration rule includes the following dual-port access scenarios: when the C1 interface and the C2 interface are simultaneously connected, the output power of the C1 interface is 100W, the output power of the C2 interface is 30W, and the total output power is 130W; when the C2 interface and the A interface are simultaneously connected, the output power of the C2 interface is 140W, the output power of the A interface is 12W, and the total output power is 152W; when the C1 interface and the A interface are simultaneously connected, the output power of the C1 interface is 140W, the output power of the A interface is 12W, and the total output power is 152W; When the C1 interface and the C5 interface are simultaneously connected, the output power of the C1 interface is 60W, the output power of the C5 interface is 100W, and the total output power is 160W; When the C5 interface and the A interface are simultaneously connected, the output power of the C5 interface is 100W, the output power of the A interface is 12W, and the total output power is 112W; when the C2 interface and the C5 interface are simultaneously connected, the output power of the C2 interface is 60W, the output power of the C5 interface is 100W, and the total output power is 160W.
  10. 10. The control method according to claim 5, wherein the preset power-down configuration rule includes the following three access scenarios: when the C1 interface, the C2 interface and the A interface are simultaneously connected, the output power of the C1 interface is 100W, the output power of the C2 interface is 30W, the output power of the A interface is 12W, and the total output power is 142W; When the C1 interface, the C2 interface and the C5 interface are simultaneously connected, the total output power is not more than 160W, and the protocol chip 1 and the protocol chip 2 distribute the power of each interface according to the P1 detection line signal; When the C1 interface, the C5 interface and the A interface are simultaneously connected, the total output power is not more than 160W, and the protocol chip 1 and the protocol chip 2 distribute the power of each interface according to the P1 detection line signal; when the C2 interface, the C5 interface and the A interface are simultaneously connected, the total output power is not more than 160W, and the protocol chip 1 and the protocol chip 2 distribute the power of each interface according to the P1 detection line signal.

Description

Distributed power reduction circuit for desktop docking station and control method Technical Field The invention relates to the technical field of docking station power reduction, in particular to a distributed power reduction circuit for a desktop docking station and a control method. Background Along with the popularization of mobile office and intelligent living scenes, electronic devices such as mobile phones, notebook computers and tablet computers become daily necessary tools for users, the requirement of simultaneously charging multiple devices is increasingly vigorous, and multi-port desktop docking stations and chargers gradually become mainstream products of the consumer market by virtue of the convenience of the multi-port desktop docking stations and chargers. The product needs to integrate a plurality of charging interfaces to meet the charging requirements of different devices, and one of the core performance indexes is to consider the stability of the number of interfaces and the charging power. However, the temperature resistance and rated working parameters of the power device determine the upper limit of the whole rated power of the charger, and the single-port output power or the number of interfaces cannot be increased without limit. Under the background, when a plurality of devices are simultaneously connected to the high-power interface of the charger, if each interface is powered according to the maximum output power, the situation that the total output power exceeds the rated power of the front-stage AC-DC conversion module is very easy to occur. As shown in fig. 2, in a typical application scenario, the rated power of the AC-DC module of the charger is 160W, the maximum output of the single port C1 and C2 is 140W, the maximum output of the single port C5 is 100W, and the maximum output of the single port a is 12W, and when the four ports are simultaneously connected to the device, the total power demand can reach 392W, which is far exceeding the upper limit of rated power. In the prior art, a power derating strategy is generally adopted by a multi-port charger to avoid overload, but the traditional derating scheme has the remarkable defects that on one hand, power distribution logic is rough, an average distribution or fixed proportion derating mode is adopted, load characteristics and equipment priorities of different interfaces are not considered, so that charging power of partial high-priority equipment (such as a working notebook computer) is insufficient to influence user experience, on the other hand, the power detection and adjustment response speed of the traditional scheme is slower, dynamic adjustment is realized by a partial scheme through 'cut-off', the problems of charging interruption, unstable equipment power supply and the like are easily caused, the charging efficiency is influenced, and potential damage to hardware of sensitive electronic equipment is also likely to be caused. In addition, when the total power seriously exceeds the standard, the existing derating mechanism cannot effectively control the total power within the rated range, so that the AC-DC module is frequently restarted, forced shutdown and other faults due to overload triggering protection mechanism, normal charging requirements of access equipment cannot be guaranteed, aging of an internal circuit of a charger can be accelerated, the service life of a product is shortened, and even potential safety hazards can be caused due to long-term overheat. In summary, the existing power derating technology of the multi-port charger has the defects in the aspects of power distribution accuracy, adjustment response speed, overload protection reliability and the like, and cannot fully meet the requirements of stability and practicability under the condition of simultaneous charging of multiple devices. Therefore, a high-efficiency and accurate distributed power reduction method is needed, reasonable power distribution of each interface is realized on the premise that the total power does not exceed the rated power of the AC-DC, charger faults and abnormal equipment charging are avoided, and reliability and user experience of products are improved. To this end, a distributed power reduction circuit and control method for a desktop docking station is presented. Disclosure of Invention The invention aims to provide a distributed power reduction circuit and a control method for a desktop docking station, which are used for solving the problems in the background art. In order to achieve the purpose, the invention provides the following technical scheme that the distributed power reduction circuit for the desktop docking station comprises: The power-down configuration is carried out after the related signals are detected, and the P1 detection line and the P2 detection line are in a low level by default; The device comprises a C1 port, a C2 port, an A port and a C5 port, wherein the C1 port, the C2 port and the A po