CN105140583A - USB port based quick charge method - Google Patents
USB port based quick charge method Download PDFInfo
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- CN105140583A CN105140583A CN201510593295.2A CN201510593295A CN105140583A CN 105140583 A CN105140583 A CN 105140583A CN 201510593295 A CN201510593295 A CN 201510593295A CN 105140583 A CN105140583 A CN 105140583A
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- charger
- smart machine
- voltage
- usb port
- preset voltage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a USB port based quick charge method. The method comprises the following steps: firstly, a charger end initiates a quick charge inquiry, and a smart equipment end determines whether the quick charge is accepted or not according to the own state after receiving the quick charge inquiry and then feeds back a determination signal if the quick charge is accepted; if the quick charge is not accepted, feeding back is not performed; a state machine of the charger end is switched to a next state and initiates another quick charge inquiry (trial) if the charger end does not receive a feedback signal within set time; when the state machine does not receive a quick charge determination signal from the smart equipment end after polling for one circle, the charger outputs voltage to the smart equipment according to a default value. The drive capability of the charger can be played to the utmost extent, and overload of the charger is avoided.
Description
Technical field
The present invention relates to conduct electrical energy technical field, be specifically related to the charging method between electronic equipment and charger.
Background technology
Electronic equipment is day by day intelligent, is especially the intelligent movable equipment of representative with mobile phone, and its abundant function needs smart machine to possess sufficient power supply supply.Intelligent movable equipment usually using battery as power supply, so more and more higher to energy content of battery demand.Meanwhile, smart machine deisgn approach is frivolous, limits the volume of battery, also namely limits the portable energy content of battery.Therefore, charging becomes the means solving energy content of battery deficiency, and the feature that quick charge quickly supplements energy with it, become industrial hot spot.
Current, Qualcomm releases quick charge QC2.0 agreement; MTK company releases quick charge PumpExpressPlus agreement; Ti releases quick charge MaxCharge agreement.International Standards Organization USB also releases PD agreement.
QC2.0 agreement is that the two data lines D+/D-by connecting the USB interface between smart machine and charger carry out communication.Charger acquiescence short circuit D+/D-, after smart machine connects, according to USBBC1.2 agreement, detect that charger type is DCP, charger exports 5v.Smart machine initiates to fill request soon, and D+ line loads 0.325v voltage.After charger detects that D+ voltage maintains 0.325v voltage 1.25s, charger enters fast mold filling formula, disconnects D+/D-, and on D-line, adds 20K ohm pull down resistance.After smart machine detects D-Voltage Drop, initiate the request of charging quickly pressure, by loading different magnitudes of voltage to D+/D-to charger.Charger detects the voltage on D+/D-, regulation output voltage.Concrete corresponding relation is as shown in the table:
| D+ | D-- | Output |
| 0.6V | 0.6V | 12V |
| 3.3V | 0.6V | 9V |
| 3.3V | 3.3V | 20V |
| 0.6V | GND | 5V(default) |
PumpExpressPlus agreement is modulated by USBVBUS linear load, initiates request, after charger recognizes request command, according to the UP/DOWN instruction that agreement specifies, according to 200mV granularity, heighten/turn down output voltage by smart machine to charger.
USBPD agreement is by USBVBUS line or Type-CCC line, completes smart machine and charger fills protocol soon.
As from the foregoing, these charging communication protocols based on USB port existing are all initiated to fill request soon to charger by smart machine, and this mode can not give full play to the driving force of charger.
Summary of the invention
The invention provides a kind of fast charge method based on USB port, initiatively initiated to fill trial soon by charger, smart machine confirms which kind of charging quickly pressure/electric current is applicable to oneself, then confirms charging.Object of the present invention is realized by following technical scheme:
Based on a fast charge method for USB port, the charging system of its application comprises charger, smart machine and USB connecting line, the USB port of USB line connecting charger and the USB port of smart machine; Described fast charge method comprises: (1) arranges the preset voltage of stepping according to each shelves output voltage correspondence that charger can provide, and arranges an overvoltage protection threshold according to the acceptable input voltage range of smart machine self; (2) charger sends maximum preset voltage by the D+ of its USB port end or D-end to smart machine, and whether inquiry smart machine accepts output voltage corresponding to current preset voltage; (3) if the preset voltage that charger sends exceedes the overvoltage protection threshold of smart machine, then smart machine does not accept charging voltage corresponding to this preset voltage yet not feedback acknowledgment signal, otherwise is held by D-or D+ holds feedback acknowledgment signal; If charger receives the confirmation signal of feedback in certain hour section, then VBUS end configures corresponding output voltage according to current preset voltage and charges to smart machine, otherwise enters step (4); (4) automatically lower one grade of preset voltage, again initiate inquire and return step (3); (5) when all steppings preset voltage corresponding to charging voltage all do not accepted by smart machine, then charger VBUS end export with default voltage.
As concrete technical scheme, also comprised before step (2): the D+ end of charger USB port and D-end, by switch S 1 short circuit, export with default voltage; When described smart machine is by data wire connecting charger, foundation BC1.2 specification detects charger and smart machine charges with default voltage; Disconnect the D+ end of charger USB port and the short circuit of D-end afterwards, D-holds with a resistive pull-downs to ground, and enters step (2).
As concrete technical scheme, in step (5): when all steppings preset voltage corresponding to charging voltage all do not accepted by smart machine, the D+ end of described switch S 1 short circuit charger USB port and D-end, the VBUS end of charger exports with default voltage.
As concrete technical scheme, the confirmation signal of described smart machine feedback is the high level signal that a switch S 2 controls.
Fast charge method based on USB port provided by the invention, first initiated to fill inquiry (trial) soon by charger end, after smart machine termination receives and fills inquiry soon, according to oneself state, determine that whether accepting this kind fills, soon as accepted then feedback confirmation signal; If do not accepted, then without any feedback.Charger end does not receive feedback signal in setting, and its state machine switches, to next state, is initiated another and filled inquiry (trial) soon.After state machine poll one encloses, what do not receive smart machine end yet fills confirmation signal soon, then charger exports to smart machine according to default value.The present invention can play charger driving force to greatest extent, also can not cause chargers gets overloaded.
Accompanying drawing explanation
The theory diagram of the fast charge method that Fig. 1 provides for the present embodiment of the present invention.
The exemplary plot of the charging system applied of the fast charge method that Fig. 2 provides for the present embodiment of the present invention.
Embodiment
As shown in Figure 1, the fast charge method that the present embodiment provides, the charging system of its application comprises charger, smart machine and USB connecting line, the USB port of USB line connecting charger and the USB port of smart machine.
As shown in Figure 2, charger arrangement has USB port, state machine, preset voltage module, power supply output module (the DCDC/ACDC module namely in figure), switch S 1 and earth resistance; State machine is for configuring the output voltage of preset voltage module and configuring the output voltage of power supply output module, preset voltage module is used for exporting each shelves preset voltage to D+ end, and power supply output module is used for exporting to VBUS the corresponding charging voltage reaching charge protocol; Switch S 1 is held for short circuit D+ and D-end, and D-is held ground connection by earth resistance.Meanwhile, smart machine is configured with USB port, Power Entry Module, port detecting module, MCU, switch S 2 and confirmation signal power supply VCC; Power Entry Module is used for receiving charge power supply by VBUS, the preset voltage that port detecting module receives for detecting D+, MCU is used for acceptable to the preset voltage received and smart machine preset voltage thresholds to compare, judge whether to accept charging voltage corresponding to this preset voltage, and the keying of control switch S2; Switch S 2 connects confirmation signal power supply VCC and D-and holds, for holding the D-to charger to hold feedback acknowledgment information number by the D-of smart machine time closed.
Based on the charging system of Fig. 2, its charge control method is described as follows:
1) the corresponding preset voltage (" preset voltage/charging voltage correspondence table " that vide infra) arranging stepping of each shelves output voltage that, according to charger can provide, arranges an overvoltage protection threshold according to the acceptable input voltage range of smart machine self.
2), the D+ of charger USB port end and D-hold short circuit, and acquiescence exports 5v.
3), smart machine by after data wire connecting charger, according to BC1.2 specification detection charger and smart machine acquiescence 5v charging.
4), disconnect the D+ end of charger USB port and D-holds short circuit, D-end with a resistive pull-downs to.
5), charger loads maximum preset voltage, such as 2v voltage to D+ end, maintenance 1.25s.
6), smart machine detects 2v voltage on D+ line, and according to preset voltage/charging voltage correspondence table, judge whether to accept this charging voltage, if charging voltage is higher than the acceptable input voltage range of smart machine, then smart machine does not respond.
7), after 1.25s, charger is not as received the response signal of smart machine, and charger loads 1.5v voltage to D+ line, maintains 1.25s.
8), Intelligent Measurement is to D+ line voltage, return step (6), if do not accepted this specification charging voltage, the preset voltage be carried on D+ line lowered successively by charger, until smart machine accepts the charging voltage of some specifications, smart machine end switch S2 closes, and smart machine returns 3.3v (high level confirmation signal) by D-alignment charger, confirms that communication is shaken hands successfully.
9), after charger detects D-line 3.3v voltage, according to D+ line voltage/charging voltage table of comparisons, configuration fills output voltage soon.
10) if the charging voltage corresponding to preset voltage that charger loads to D+ does not all meet smart machine demand.Then charger still exports with the 5v of acquiescence.
Voltage corresponding relation example on above-mentioned charger output voltage and D+/D-is not as following table (limiting the parameter in form).
| D+ | D-- | Output |
| 2.0V | 3.3V | 20V |
| 1.5V | 3.3V | 12V |
| 1.0V | 3.3V | 9V |
| * | 0V | 5V(default) |
Preset voltage/charging voltage correspondence table
As from the foregoing, first the scheme of the present embodiment is initiated to fill inquiry (trial) soon by charger end, after smart machine termination receives and fills inquiry soon, according to oneself state, determines that whether accepting this kind fills, soon as accepted then feedback confirmation signal; If do not accepted, then without any feedback.Charger end does not receive feedback signal in setting, and its state machine switches, to next state, is initiated another and filled inquiry (trial) soon.After state machine poll one encloses, what do not receive smart machine end yet fills confirmation signal soon, then charger exports to smart machine according to default value.
Above embodiment is only fully open and unrestricted the present invention, everyly without the replacement of creative work and obtainable equivalence techniques feature, should belong to the scope that invention is contained based on purport of the present invention.
Claims (4)
1., based on a fast charge method for USB port, the charging system of its application comprises charger, smart machine and USB connecting line, the USB port of USB line connecting charger and the USB port of smart machine; It is characterized in that, described fast charge method comprises: (1) arranges the preset voltage of stepping according to each shelves output voltage correspondence that charger can provide, and arranges an overvoltage protection threshold according to the acceptable input voltage range of smart machine self; (2) charger sends maximum preset voltage by the D+ of its USB port end or D-end to smart machine, and whether inquiry smart machine accepts output voltage corresponding to current preset voltage; (3) if the preset voltage that charger sends exceedes the overvoltage protection threshold of smart machine, then smart machine does not accept charging voltage corresponding to this preset voltage yet not feedback acknowledgment signal, otherwise is held by D-or D+ holds feedback acknowledgment signal; If charger receives the confirmation signal of feedback in certain hour section, then VBUS end configures corresponding output voltage according to current preset voltage and charges to smart machine, otherwise enters step (4); (4) automatically lower one grade of preset voltage, again initiate inquire and return step (3); (5) when all steppings preset voltage corresponding to charging voltage all do not received by smart machine, then charger VBUS end export with default voltage.
2. the fast charge method based on USB port according to claim 1, is characterized in that, also comprises before step (2): the D+ end of charger USB port and D-end, by switch S 1 short circuit, export with default voltage; When described smart machine is by data wire connecting charger, foundation BC1.2 specification detects charger and smart machine charges with default voltage; Disconnect the D+ end of charger USB port and the short circuit of D-end afterwards, D-holds with a resistive pull-downs to ground, and enters step (2).
3. the fast charge method based on USB port according to claim 2, it is characterized in that, in step (5): when all steppings preset voltage corresponding to charging voltage all do not accepted by smart machine, the D+ end of described switch S 1 short circuit charger USB port and D-end, the VBUS end of charger exports with default voltage.
4. the fast charge method based on USB port according to claim 1,2 or 3, is characterized in that, the confirmation signal of described smart machine feedback is the high level signal that a switch S 2 controls.
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| CN201510593295.2A CN105140583B (en) | 2015-09-17 | 2015-09-17 | Fast charge method based on USB port |
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| CN201510593295.2A CN105140583B (en) | 2015-09-17 | 2015-09-17 | Fast charge method based on USB port |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490333A (en) * | 2015-12-18 | 2016-04-13 | 深圳市芯沃微电子有限公司 | Rapid charging control circuit for battery, adapter and mobile equipment |
| CN105826979A (en) * | 2016-04-27 | 2016-08-03 | 乐视控股（北京）有限公司 | Charging matching method, apparatus, electronic device and PD charger |
| CN106058983A (en) * | 2016-06-30 | 2016-10-26 | 维沃移动通信有限公司 | Charging control circuit, electronic equipment and charging control method |
| CN106329656A (en) * | 2016-09-26 | 2017-01-11 | 宇龙计算机通信科技(深圳)有限公司 | Electronic device and charging method thereof |
| CN106537719A (en) * | 2016-08-15 | 2017-03-22 | 北京小米移动软件有限公司 | Electronic device, charger, charging system, and charging method |
| CN107516919A (en) * | 2017-08-25 | 2017-12-26 | 维沃移动通信有限公司 | A kind of charging method and charger |
| CN110161429A (en) * | 2019-05-24 | 2019-08-23 | 深圳市乐得瑞科技有限公司 | Power supply adaptor test method, device, server and storage medium |
| CN110881042A (en) * | 2019-11-29 | 2020-03-13 | 株洲新奥燃气有限公司 | Gas pipe network monitoring data acquisition terminal and output voltage adjustment method thereof |
| CN110881698A (en) * | 2018-08-21 | 2020-03-17 | 湖南中烟工业有限责任公司 | Split type low-temperature smoking set charging detection control method |
| CN111030208A (en) * | 2019-11-19 | 2020-04-17 | 国网江苏省电力有限公司电力科学研究院 | Household appliance power supply method, power receiving method and circuit based on USB Type-C interface |
| CN113472340A (en) * | 2021-06-11 | 2021-10-01 | 上海南芯半导体科技有限公司 | USB Type-C/PD communication interface circuit and control method thereof |
| CN114003531A (en) * | 2020-07-28 | 2022-02-01 | 苏州能讯高能半导体有限公司 | USB Type C interface circuit and terminal equipment |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490333A (en) * | 2015-12-18 | 2016-04-13 | 深圳市芯沃微电子有限公司 | Rapid charging control circuit for battery, adapter and mobile equipment |
| CN105826979A (en) * | 2016-04-27 | 2016-08-03 | 乐视控股（北京）有限公司 | Charging matching method, apparatus, electronic device and PD charger |
| CN106058983B (en) * | 2016-06-30 | 2019-01-29 | 维沃移动通信有限公司 | A kind of charging control circuit, electronic equipment and charge control method |
| CN106058983A (en) * | 2016-06-30 | 2016-10-26 | 维沃移动通信有限公司 | Charging control circuit, electronic equipment and charging control method |
| CN106537719B (en) * | 2016-08-15 | 2020-01-10 | 北京小米移动软件有限公司 | Electronic device, charger, charging system and charging method |
| CN106537719A (en) * | 2016-08-15 | 2017-03-22 | 北京小米移动软件有限公司 | Electronic device, charger, charging system, and charging method |
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| CN106329656A (en) * | 2016-09-26 | 2017-01-11 | 宇龙计算机通信科技(深圳)有限公司 | Electronic device and charging method thereof |
| CN107516919A (en) * | 2017-08-25 | 2017-12-26 | 维沃移动通信有限公司 | A kind of charging method and charger |
| CN110881698A (en) * | 2018-08-21 | 2020-03-17 | 湖南中烟工业有限责任公司 | Split type low-temperature smoking set charging detection control method |
| CN110161429A (en) * | 2019-05-24 | 2019-08-23 | 深圳市乐得瑞科技有限公司 | Power supply adaptor test method, device, server and storage medium |
| CN111030208A (en) * | 2019-11-19 | 2020-04-17 | 国网江苏省电力有限公司电力科学研究院 | Household appliance power supply method, power receiving method and circuit based on USB Type-C interface |
| CN111030208B (en) * | 2019-11-19 | 2021-07-20 | 国网江苏省电力有限公司电力科学研究院 | Household appliance power supply method, power receiving method and circuit based on USB Type-C interface |
| CN110881042A (en) * | 2019-11-29 | 2020-03-13 | 株洲新奥燃气有限公司 | Gas pipe network monitoring data acquisition terminal and output voltage adjustment method thereof |
| CN114003531A (en) * | 2020-07-28 | 2022-02-01 | 苏州能讯高能半导体有限公司 | USB Type C interface circuit and terminal equipment |
| CN113472340A (en) * | 2021-06-11 | 2021-10-01 | 上海南芯半导体科技有限公司 | USB Type-C/PD communication interface circuit and control method thereof |
| CN113472340B (en) * | 2021-06-11 | 2023-11-21 | 上海南芯半导体科技股份有限公司 | Interface circuit for USB Type-C/PD communication and control method thereof |
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