Type-a-port power supply circuit and electronic device

Abstract

Provided in the present invention are a type-A-port power supply circuit and an electronic device. A power source is coupled to a voltage input end of a type-A port by means of a first switch. A voltage busbar end of a power supply control chip is coupled to the voltage input end of the type-A port, a power supply control end thereof is coupled to a control end of the first switch, an insertion detection end thereof is coupled to the voltage busbar end by means of an insertion detection module, and a current detection end is coupled to a grounding end of the type-A port. The power supply control chip supplies a first set voltage to the insertion detection end. The insertion detection module is only turned on when the voltage at the insertion detection end is higher than that at the voltage busbar end; when the voltage value of the insertion detection end is lower than the first set voltage, the power supply control chip determines that a powered device has been inserted, and controls the first switch to turn on; and when the power supply control chip detects that the current value of a first current at the grounding end of the type-A port is lower than a first current threshold value, the power supply control chip determines that the powered device has been removed or is fully charged, and controls the first switch to turn off. Thus, the device of the present invention realizes a zero-watt standby function.

Description

Type A interface power supply circuit and electronic equipment TECHNICAL FIELD

[0001] The present application relates to the technical field of charging, in particular to a Type A interface power supply circuit and electronic equipment. BACKGROUND

[0002] The zero-watt standby function can stop power supply when the powered device is unplugged or the powered device is fully charged, reduce standby loss and save power energy.

[0003] At present, the zero-watt standby function is only common on the Type C interface power supply circuit of Type C to Type C line, because the Type C to Type C line is configured with a power-on protocol line (CC line), and the Type C interface power supply circuit can determine whether zero-watt standby is needed, while the Type A to Type C line does not have a power-on protocol line (CC line), so the Type A interface power supply circuit cannot realize the zero-watt standby function.

[0004] Therefore, how to enable the Type A interface power supply circuit to have the zero-watt standby function has become a technical problem that needs to be solved in the industry at present. SUMMARY

[0005] The present application provides a Type A interface power supply circuit and electronic equipment, which solves the technical problem that the Type A interface power supply circuit cannot realize the zero-watt standby function.

[0006] According to a first aspect of the present application, the present application provides a Type A interface power supply circuit, comprising:

[0007] A power supply is coupled to the voltage input end of the Type A interface through a first switch;

[0008] The voltage bus end of the power supply control chip is coupled to the voltage input end of the Type A interface, the power supply control end of the power supply control chip is coupled to the control end of the first switch, the insertion detection end of the power supply control chip is coupled to the voltage bus end through an insertion detection module, and the current detection end of the power supply control chip is coupled to the ground end of the Type A interface;

[0009] The power supply control chip is configured to:

[0010] provide a first set voltage to the insertion detection end, and control the first switch to be turned on when the voltage value of the insertion detection end is lower than the first set voltage;

[0011] real-time detect the size of the first current flowing through the ground end of the Type A interface, and control the first switch to be turned off when the current value of the first current is less than a first current threshold.

[0012] The insertion detection module is configured to be turned on only when the voltage of the insertion detection end is higher than the voltage bus end; otherwise, the insertion detection module is turned off.

[0013] Optionally, the power supply control chip comprises a comparison module, a current detection module and a micro control unit.

[0014] The first input end of the comparison module is coupled to the insertion detection end, the second input end of the comparison module receives the first set voltage output by the power supply control chip, and the output end of the comparison module sends a first signal to the first end of the micro control unit, the first signal comprising a comparison result of the voltage value of the insertion detection end and the voltage value of the first set voltage.

[0015] The first end of the current detection module is coupled to the current detection end, and the second end of the current detection module sends a second signal to the second end of the micro control unit, the second signal comprising current value information of the first current.

[0016] The third end of the micro control unit is coupled to the control end of the first switch.

[0017] The micro control unit is configured to:

[0018] When the comparison result represents that the voltage value of the insertion detection end is lower than the first set voltage, the micro control unit controls the first switch to be turned on.

[0019] When the current value signal of the first current represents that the current value of the first current is less than a first current threshold, the micro control unit controls the first switch to be turned off.

[0020] Optionally, the insertion detection module comprises a diode, the anode of the diode being coupled to the insertion detection end of the power supply control chip, and the cathode of the diode being coupled to the voltage bus end of the power supply control chip.

[0021] Optionally, the insertion detection module comprises a MOS tube, the first end of the MOS tube being coupled to the insertion detection end of the power supply control chip, the second end of the MOS tube being coupled to the voltage bus end of the power supply control chip, and the control end of the MOS tube being grounded.

[0022] Optionally, the insertion detection module comprises a triode, the first end of the triode being coupled to the insertion detection end of the power supply control chip, the base of the triode being coupled to the voltage bus end of the power supply control chip, and the second end of the triode being grounded.

[0023] Optionally, the insertion detection module comprises a second switch and a first resistor.

[0024] The insertion detection end of the power supply control chip is coupled to the voltage bus end through the first resistor and the second switch in sequence, and the second switch control end of the power supply control chip is coupled to the control end of the second switch;

[0025] The power supply control chip is further configured to:

[0026] A first set voltage is provided to the insertion detection end, and when the voltage value of the insertion detection end is lower than the first set voltage, the first switch is controlled to be turned on and the second switch is controlled to be turned off;

[0027] The size of the first current flowing through the ground end of the Type A interface is detected in real time, and when the current value of the first current is less than a first current threshold, the first switch is controlled to be turned off and the second switch is controlled to be turned on.

[0028] Optionally, the insertion detection end includes a first sub-insertion detection end, a second sub-insertion detection end, and a third sub-insertion detection end.

[0029] The first sub-insertion detection end is coupled to the first end of the first resistor and the first input end of the comparison module, the second end of the first resistor is coupled to the voltage bus end through the second switch, the second sub-insertion detection end is coupled to the first end of the first resistor, and the third sub-insertion detection end is coupled to the second end of the first resistor.

[0030] The second sub-insertion detection end and the third sub-insertion detection end are coupled to the first input end of the comparison module.

[0031] The power supply control chip is further configured to:

[0032] A first set voltage is provided to the first sub-insertion detection end, and the current of the first resistor is detected in real time through the second sub-insertion detection end and the third sub-insertion detection end, when there is a current signal in the path of the first resistor, the voltage value of the first sub-insertion detection end is obtained, and when the voltage value of the first sub-insertion detection end is lower than the first set voltage, the first switch is controlled to be turned on and the second switch is controlled to be turned off.

[0033] The size of the first current flowing through the ground end of the Type A interface is detected in real time, and when the current value of the first current is less than a first current threshold, the first switch is controlled to be turned off and the second switch is controlled to be turned on.

[0034] Optionally, the insertion detection end of the power supply control chip is a detection pin.

[0035] Optionally, the insertion detection end of the power supply control chip is a normal interrupt pin.

[0036] Optionally, the power supply control chip further comprises an external power supply end, and the Type A port power supply circuit further comprises a second resistor, and the external power supply end is coupled to the common interrupt pin through the second resistor.

[0037] The first end of the second resistor is coupled to the external power supply end of the power supply control chip, and the second end of the second resistor is coupled to the insertion detection end of the power supply control chip.

[0038] The external power supply end is configured to provide a first set voltage to the insertion detection end.

[0039] Optionally, the power supply control chip further comprises a charge pump, a first end of the charge pump is coupled to a third end of the micro control unit, and a second end of the charge pump is coupled to a control end of the first switch.

[0040] Optionally, the Type A port power supply circuit further comprises a third resistor, and the current detection end comprises a first sub-current detection end and a second sub-current detection end.

[0041] The first end of the third resistor is coupled to the first sub-current detection end and a ground end of the power supply control chip.

[0042] The second end of the third resistor is coupled to the second sub-current detection end and a ground end of the Type A interface.

[0043] Optionally, the first switch is a power MOS tube, a first end of the power MOS tube is coupled to the power supply, a second end of the power MOS tube is coupled to a voltage input end of the Type A interface, and a control end of the power MOS tube is coupled to a power supply control end of the power supply control chip.

[0044] Optionally, the power supply is a direct current power supply or an alternating current power supply.

[0045] According to a second aspect of the present application, an electronic device is provided, comprising a Type A port power supply circuit and a Type A to Type C line, the Type A to Type C line comprising a voltage bus connection line and a ground line.

[0046] The voltage bus end of the power supply control chip is coupled to the voltage bus connection line of the Type A interface of the Type A to Type C line, the insertion detection end of the power supply control chip is coupled to the voltage bus connection line through an insertion detection module, and the current detection end of the power supply control chip is coupled to the ground line through a third resistor.

[0047] Optionally, the power supply control chip of the Type A power supply circuit further comprises a first communication protocol end and a second communication protocol end; and the Type A to Type C cable further comprises a first protocol transmission line and a second protocol transmission line.

[0048] The first protocol transmission line and the second protocol transmission line are coupled to the first communication protocol end and the second communication protocol end, respectively.

[0049] Optionally, in the case of the power receiving device being connected, the power supply circuit in the power supply device is coupled to the power receiving device through the Type A to Type C cable.

[0050] Compared with the prior art, the technical scheme of the embodiment of the present application has the following beneficial effects:

[0051] The present application provides a Type A power supply circuit and electronic equipment, so that the power supply is coupled to the voltage input end of the Type A interface through the first switch, the voltage bus end of the power supply control chip is coupled to the voltage input end of the Type A interface, the power supply control end is coupled to the control end of the first switch, the insertion detection end is coupled to the voltage bus end through the insertion detection module, and the current detection end is coupled to the ground end of the Type A interface. The power supply control chip provides a first set voltage to the insertion detection end, and the insertion detection module is only turned on when the voltage of the insertion detection end is higher than that of the voltage bus end. When the voltage value of the insertion detection end is lower than the first set voltage, the power supply control chip judges that the power receiving device is connected and controls the first switch to be turned on, and the Type A power supply circuit exits the zero power consumption state. When the power supply control chip detects that the current value of the first current of the ground end of the Type A interface is lower than the first current threshold, it judges that the power receiving device is pulled out or fully charged, and controls the first switch to be turned off, and the Type A power supply circuit enters the zero power consumption state. Therefore, the Type A power supply circuit of the present application realizes the zero-watt standby function. BRIEF DESCRIPTION OF DRAWINGS

[0052] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0053] Figure 1 is a schematic diagram of the structure of the prior art Type C power supply circuit distinguished from the present application;

[0054] Figure 2 is a schematic diagram of the structure of a first embodiment of a Type A power supply circuit of the present application;

[0055] Fig. 3 is a schematic diagram of a second embodiment of a Type A port power supply circuit according to the present application;

[0056] Fig. 4 is a schematic diagram of a third embodiment of a Type A port power supply circuit according to the present application;

[0057] Fig. 5 is a schematic diagram of a fourth embodiment of a Type A port power supply circuit according to the present application;

[0058] Fig. 6 is a schematic diagram of a fifth embodiment of a Type A port power supply circuit according to the present application;

[0059] Fig. 7 is a schematic diagram of a sixth embodiment of a Type A port power supply circuit according to the present application;

[0060] Fig. 8 is a schematic diagram of a seventh embodiment of a Type A port power supply circuit according to the present application;

[0061] Fig. 9 is a schematic diagram of an eighth embodiment of a Type A port power supply circuit according to the present application;

[0062] Fig. 10 is a schematic diagram of a ninth embodiment of a Type A port power supply circuit according to the present application;

[0063] Fig. 11 is a schematic diagram of a tenth embodiment of a Type A port power supply circuit according to the present application;

[0064] Fig. 12 is a schematic diagram of an electronic device according to an embodiment of the present application.

[0065] Explanation of Reference Numerals:

[0066] 1 - Type C port power supply circuit;

[0067] 2 - Type A port power supply circuit;

[0068] 10 - Power supply source of Type C port power supply circuit;

[0069] 11 - Power supply control chip of Type C port power supply circuit;

[0070] 21 - Power supply source of Type A port power supply circuit;

[0071] 22 - Power supply control chip of Type A port power supply circuit;

[0072] 221 - Comparison module;

[0073] 222 - Micro control unit;

[0074] 223 - Current detection module;

[0075] 224-charge pump;

[0076] 23-insertion detection module;

[0077] 3-Type C to Type C cable;

[0078] 31-first Type C interface of Type C to Type C cable;

[0079] 32-second Type C interface of Type C to Type C cable;

[0080] 311-voltage bus connecting line of Type C to Type C cable;

[0081] 312-communication connecting line of Type C to Type C cable;

[0082] 313-detection connecting line of Type C to Type C cable;

[0083] 314-first protocol transmission line of Type C to Type C cable;

[0084] 315-second protocol transmission line of Type C to Type C cable;

[0085] 316-ground line of Type C to Type C cable;

[0086] 4-Type A to Type C cable;

[0087] 41-Type A interface of Type A to Type C cable;

[0088] 42-Type C interface of Type C to Type C cable;

[0089] 411-voltage bus connecting line of Type A to Type C cable;

[0090] 412-ground line of Type A to Type C cable;

[0091] 413-first protocol transmission line of Type A to Type C cable;

[0092] 414-second protocol transmission line of Type A to Type C cable;

[0093] 5-powered device

[0094] M1-first switch;

[0095] M2-second switch;

[0096] R1-first resistor;

[0097] R2-second resistor;

[0098] R3-third resistor;

[0099] GATE-power control end of power control chip;

[0100] VBUS-voltage bus end of power control chip;

[0101] GPIO-control end of second switch of power control chip;

[0102] CC1-first insertion detection end;

[0103] CC2-second insertion detection end;

[0104] CS1-first sub insertion detection end;

[0105] CS2-second sub insertion detection end;

[0106] CS3-third sub insertion detection end;

[0107] CC-detection pin;

[0108] INT-ordinary interrupt pin;

[0109] D+-first communication protocol end;

[0110] D--second communication protocol end;

[0111] CS-current detection end;

[0112] CSN-first sub current detection end;

[0113] CSP-second sub current detection end;

[0114] VCC1-voltage output end of power supply;

[0115] VCC1-voltage input end of power control chip;

[0116] V1-first set voltage. DETAILED DESCRIPTION

[0117] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0118] The terms "first", "second", "third", "fourth" and the like in the description and claims of the present application and above figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of such terms is not to limit the scope of the embodiments described herein, which are capable of functioning in orders other than those described. Furthermore, the terms "comprise" and "include", and variations thereof, do not have a limiting meaning and assist in disclosure without excluding or in any way implying any further components, steps, processes, materials or functions.

[0119] The technical solutions of the present application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in some embodiments.

[0120] Before the present application is presented, the applicant has fully researched the power supply circuit with zero-watt standby function. Please refer to FIG. 1, which shows a schematic diagram of a Type C port power supply circuit with zero-watt standby function. The Type C port power supply circuit 1 includes:

[0121] The power supply source 10 is coupled to the voltage input end 311 of the first Type C interface 31 through the first switch M1;

[0122] The voltage bus end VBUS of the power supply control chip 10 is coupled to the voltage input end 311 of the Type C interface 31, the power supply control end GATE of the power supply control chip 21 is coupled to the control end of the first switch M1, and the first plug-in detection end CC1 and the second plug-in detection end CC2 of the power supply control chip 21 are respectively coupled to the first identification end 312 and the second identification end 313 of the first Type C interface 31;

[0123] The first identification end 312 and the second identification end 313 of the first Type C interface can be respectively understood as the communication connection line 312 and the detection connection line 313 of the Type C to Type C cable 3;

[0124] Among them, as shown in FIG. 1, the first plug-in detection end CC1 is used to transmit the cable identification signal through the communication connection line 312, and the second plug-in detection end CC2 is used to transmit the device identification signal through the detection connection line 313. Through the first plug-in detection end CC1 and the second plug-in detection end CC2, the Type C port power supply circuit 1 can automatically detect the connection direction of the device and the type of the cable, thereby realizing fast and reliable connection.

[0125] Meanwhile, the power supply control chip 10 can also determine whether a device is connected according to the first insertion detection terminal CCl and the second insertion detection terminal CC2, and when no device is connected, the power supply control chip 11 controls the first switch Ml to be off, so as to realize the zero-watt standby function.

[0126] However, there is no communication connection line 312 or detection connection line 313 in the Type A to Type C line, and therefore, when the Type C port power supply circuit is used as the power supply circuit of the Type A to Type C line, the Type C port power supply circuit cannot realize the zero-watt standby function.

[0127] Therefore, the application creatively proposes a Type A port power supply circuit, in which a power supply is coupled to a voltage input terminal of a Type A interface through a first switch, a voltage bus terminal of a power supply control chip is coupled to the voltage input terminal of the Type A interface, a power supply control terminal of the power supply control chip is coupled to a control terminal of the first switch, an insertion detection terminal of the power supply control chip is coupled to the voltage bus terminal through an insertion detection module, and a current detection terminal of the power supply control chip is coupled to a ground terminal of the Type A interface. The power supply control chip provides a first set voltage to the insertion detection terminal, and the insertion detection module is only turned on when the voltage of the insertion detection terminal is higher than the voltage of the voltage bus terminal. When the voltage value of the insertion detection terminal of the power supply control chip is lower than the first set voltage, it is determined that a powered device is connected and the first switch is controlled to be turned on, and the Type A port power supply circuit exits the zero-power consumption state. When the power supply control chip detects that the current value of the first current flowing through the ground terminal of the Type A interface is lower than a first current threshold, it is determined that the powered device is unplugged or fully charged, and the first switch is controlled to be turned off, and the Type A port power supply circuit enters the zero-power consumption state. Therefore, the Type A port power supply circuit of the application realizes the zero-watt standby function.

[0128] Please refer to FIG. 2, an embodiment of the application provides a Type A port power supply circuit 2, wherein,

[0129] A power supply 21 is coupled to a voltage input terminal of a Type A interface 41 through a first switch Ml;

[0130] A voltage bus terminal VUBS of a power supply control chip 22 is coupled to the voltage input terminal of the Type A interface 41, a power supply control terminal GATE of the power supply control chip 22 is coupled to a control terminal of the first switch Ml, an insertion detection terminal CC of the power supply control chip 22 is coupled to the voltage bus terminal VUBS through an insertion detection module 23, and a current detection terminal CS of the power supply control chip 22 is coupled to a ground terminal of the Type A interface 41;

[0131] The power supply control chip 22 is configured to provide a first set voltage V1 to the insertion detection end CC, and control the first switch M1 to be turned on when the voltage value of the insertion detection end CC is lower than the first set voltage V1; the power supply control chip 22 detects the current value of the first current flowing through the ground end of the Type A interface 41 in real time, and controls the first switch M1 to be turned off when the current value of the first current is less than a first current threshold.

[0132] The insertion detection module 23 is configured to be turned on only when the voltage of the insertion detection end CC is higher than the voltage bus end VUBS; otherwise, the insertion detection module 23 is turned off.

[0133] In the example of FIG. 2, the VCC1 pin of the power supply 21 is coupled to the first switch M1, and the power supply 21 is a direct current power supply or an alternating current power supply as an example.

[0134] In the example of FIG. 2, the Type A port power supply circuit 2 is coupled to the Type A interface 41 of a Type A to Type C line 4, wherein:

[0135] The voltage input end 411 of the Type A interface 41 described above can be understood as a voltage bus connection line 411 of the Type A to Type C line 4.

[0136] The ground end 412 of the Type A interface 41 described above can be understood as a ground line 412 of the Type A to Type C line 4.

[0137] In a preferred embodiment, the voltage output end VCC1 of the power supply 21 is used to supply power to the voltage input end 411 of the Type A interface 41 and the voltage input end VCC2 of the power supply control chip 22.

[0138] It can be seen that the first set voltage is provided to the insertion detection end by the power supply control chip, the insertion detection module is only turned on when the voltage of the insertion detection end is higher than the voltage bus end, the insertion detection end of the power supply control chip is coupled to the voltage bus end of the power supply control chip through the insertion detection module, the power supply control chip can supply power to the voltage bus end of the power supply control chip when the powered device is accessed, then the power supply control chip can detect that the voltage value of the insertion detection end is lower than the first set voltage, the power supply control chip judges that the powered device is accessed and controls the first switch to be turned on, and the Type A port power supply circuit can normally exit the zero power consumption state; the insertion detection end of the power supply control chip cannot supply power to the voltage bus end of the power supply control chip when the powered device is fully charged or pulled out, the power supply control chip can detect that the current value of the first current flowing through the ground end of the Type A interface is lower than the first current threshold, the power supply control chip judges that the powered device is pulled out or fully charged and controls the first switch to be turned off, and the Type A port power supply circuit can normally enter the zero power consumption state. Therefore, the Type A port power supply circuit of the present application realizes the zero-watt standby function.

[0139] As an example, the first switch M1 is a power MOS tube, the first end of the power MOS tube is coupled to the power supply 21, the second end of the power MOS tube is coupled to the voltage input end 411 of the Type A interface 41, and the control end of the power MOS tube is coupled to the power supply control end GATE of the power supply control chip 22.

[0140] In the example of FIG. 2, the power MOS tube is an NMOS tube, and of course, the present application is not limited thereto, and can also be a triode or any circuit or element capable of realizing the functions of turning off and turning on.

[0141] In an embodiment, as shown in FIG. 3, the power supply control chip 23 further includes a comparison module 221, a micro control unit 222 and a current detection module 223; the first input end of the comparison module 221 is coupled to the insertion detection end CC, the second input end of the comparison module 221 receives the first set voltage V1 output by the power supply control chip 22, and the output end of the comparison module 221 sends a first signal to the first end of the micro control unit 222, the first signal including the comparison result of the voltage value of the insertion detection end CC and the voltage value of the first set voltage V1;

[0142] The first end of the current detection module 223 is coupled to the current detection end CS, and the second end of the current detection module 223 sends a second signal to the second end of the micro control unit 222, the second signal including the current value information of the first current;

[0143] In a specific embodiment, the current detection module 223 is a current mirror.

[0144] The third end of the micro control unit 222 is coupled to the control end of the first switch M1;

[0145] The micro control unit 222 is configured to:

[0146] When the comparison result represents that the voltage value of the insertion detection end CC is lower than the first set voltage V1, the micro control unit 222 controls the first switch M1 to be turned on.

[0147] When the current value signal of the first current represents that the current value of the first current is less than the first current threshold, the micro control unit 222 controls the first switch M1 to be turned off.

[0148] As a preferred scheme of the embodiment, as shown in FIG. 4, the power supply control chip 22 further comprises a charge pump 224, the first end of the charge pump 224 is coupled to the third end of the micro control unit 22, and the second end of the charge pump 224 is coupled to the control end of the first switch M1.

[0149] Regarding the insertion detection module 23, in an embodiment, as shown in FIG. 5, the insertion detection module 23 is a diode, the anode of the diode is coupled to the insertion detection end CC of the power supply control chip 22, and the cathode of the diode is coupled to the voltage bus end VBUS of the power supply control chip 22.

[0150] Of course, the present application is not limited to this, and in another embodiment, as shown in FIG. 6, the insertion detection module 23 is a MOS tube, the first end of the MOS tube is coupled to the insertion detection end CC of the power supply control chip 22, the second end of the MOS tube is coupled to the voltage bus end VBUS of the power supply control chip 22, and the control end of the MOS tube is grounded.

[0151] In other embodiments, as shown in FIG. 7, the insertion detection module 23 is a triode, the first end of the triode is coupled to the insertion detection end CC of the power supply control chip 22, the base of the triode is coupled to the voltage bus end VBUS of the power supply control chip 22, and the second end of the triode is grounded.

[0152] It should be understood that the insertion detection module of the present application is not limited to this, and can also be MESFET, HEMT, IGBT, etc., and can also be a circuit as shown in FIG. 8, as long as it is a module that is turned on only when the voltage of the insertion detection end CC is higher than the voltage bus end VBUS, it is within the protection scope of the present application.

[0153] As shown in FIG. 8, specifically, the insertion detection module 23 comprises a second switch M2 and a first resistor R1;

[0154] The insertion detection end CC of the power supply control chip 22 is coupled to the voltage bus end VBUS through the first resistor R1 and the second switch M2 in sequence, and the second switch M2 control end GPIO of the power supply control chip 22 is coupled to the control end of the second switch M2;

[0155] The power supply control chip 22 is further configured to:

[0156] A first set voltage V1 is provided to the insertion detection end CC, and when the voltage value of the insertion detection end CC is lower than the first set voltage V1, the first switch is controlled to be turned on and the second switch is controlled to be turned off;

[0157] The size of the first current flowing through the ground end 412 of the Type A interface 41 is detected in real time, and when the current value of the first current is less than a first current threshold, the first switch M1 is controlled to be turned off and the second switch M2 is controlled to be turned on.

[0158] As a preferred embodiment, referring to FIG. 9, the insertion detection end includes a first sub-insertion detection end CS1, a second sub-insertion detection end CS2, and a third sub-insertion detection end CS3;

[0159] The first sub-insertion detection end CS1 is coupled to the first end of the first resistor R1 and the first input end of the comparison module 21, the second end of the first resistor R1 is coupled to the voltage bus end VUBS through the second switch M2, the second sub-insertion detection end CS2 is coupled to the first end of the first resistor R1, and the third sub-insertion detection end CS3 is coupled to the second end of the first resistor R2;

[0160] The power supply control chip 22 is further configured to:

[0161] A first set voltage V1 is provided to the first sub-insertion detection end CS1, and the current of the first resistor R1 is detected in real time through the second sub-insertion detection end CS2 and the third sub-insertion detection end CS3, when there is a current signal in the path of the first resistor R1, the voltage value of the first sub-insertion detection end CS1 is obtained, and when the voltage value of the first sub-insertion detection end CS1 is lower than the first set voltage V1, the first switch M1 is controlled to be turned on and the second switch M2 is controlled to be turned off;

[0162] The size of the first current flowing through the ground end 412 of the Type A interface 41 is detected in real time, and when the current value of the first current is less than a first current threshold, the first switch M1 is controlled to be turned off and the second switch M2 is controlled to be turned on.

[0163] In actual use, as shown in FIG. 5, the Type A interface power supply circuit 2 further comprises a third resistor R3; the current detection end CS comprises a first sub-current detection end CSN and a second sub-current detection end CSP;

[0164] A first end of the third resistor R3 is coupled to the first sub-current detection end CSN and a ground end GND1 of the power supply control chip 23;

[0165] A second end of the third resistor R3 is coupled to the second sub-current detection end CSP and a ground end 412 of the Type A interface 41.

[0166] In actual use, the pin of the insertion detection end can be a detection pin CC, and the power supply control chip 22 provides the first set voltage V1 to the detection pin CC.

[0167] In other embodiments, as shown in FIG. 10, the insertion detection end of the power supply control chip 22 can also be a common interrupt pin INT, and the power supply control chip 22 provides the first set voltage V1 to the common interrupt pin INT;

[0168] In this case, in an implementation, as shown in FIG. 11, the first set voltage V1 of the common interrupt pin INT is provided by the power supply control chip 22 through an external power supply end VDD;

[0169] In the example of FIG. 11, the Type A interface power supply circuit 2 further comprises a second resistor R2, and the external power supply end VDD is coupled to the common interrupt pin INT through the second resistor R2 to provide the first set voltage V1 to the common interrupt pin INT.

[0170] In summary, the application provides the first set voltage to the insertion detection end through the power supply control chip, and the insertion detection module is only turned on when the voltage of the insertion detection end is higher than that of the voltage bus end. In the case of insertion of the powered device, the voltage of the voltage bus end of the power supply control chip is pulled down, the voltage of the voltage bus end of the power supply control chip is lower than that of the insertion detection end of the power supply control chip, the insertion detection module is turned on, the voltage of the insertion detection end of the power supply control chip is pulled to be lower than the first set voltage by the voltage bus end of the power supply control chip, the output end of the comparison module of the power supply control chip sends the first signal to the micro control unit, and the comparison result of the first signal represents that the voltage value of the insertion detection end of the power supply control chip is lower than the first set voltage. The micro control unit controls the first switch to be turned on. When the powered device is pulled out or fully charged, the voltage of the voltage bus end of the power supply control chip is relatively high, the insertion detection module is not turned on, the voltage of the insertion detection end of the power supply control chip is not pulled down, the current detection module sends the second signal to the micro control unit, and the current value of the second signal represents that the current value of the first current is less than the first current threshold. The micro control unit controls the first switch to be turned off. Therefore, the Type A port power supply device can normally enter and exit the zero power consumption state.

[0171] In addition, as shown in FIG. 12, the application also provides an electronic device, which comprises the above-mentioned Type A port power supply circuit 2 and Type A to Type C line 4,

[0172] The Type A to Type C line 4 comprises a voltage bus connection line 411 and a ground line 412; the voltage bus end VUBS of the power supply control chip 22 is coupled to the voltage bus connection line 411, the insertion detection end CC of the power supply control chip 22 is coupled to the voltage bus connection line 411 through the insertion detection module 23, and the first sub-current detection end CSN of the power supply control chip 22 is coupled to the ground line 412 through the third resistor R3.

[0173] In the example as shown in FIG. 12, the power supply control chip 22 further comprises a first communication protocol end D+ and a second communication protocol end D-; and the Type A to Type C line 4 further comprises a first protocol transmission line 413 and a second protocol transmission line 414.

[0174] The first protocol transmission line 413 and the second protocol transmission line 414 are respectively coupled to the first communication protocol end D+ and the second communication protocol end D-.

[0175] In the example as shown in FIG. 10, the Type A port power supply circuit 2 in the power supply device is coupled to the powered device 5 through the Type C interface 42 of the Type A to Type C line 4.

[0176] Now taking the first set voltage of 3.3V as an example, the working effect of the Type A port power supply circuit 2 is described:

[0177] When the powered device 5 is connected, the voltage of the voltage bus end VBUS of the Type A port power supply circuit 2 is pulled down. When the voltage of the voltage bus end VBUS is lower than the second set voltage, the insertion detection end CC of the power supply control chip 22 supplies power to the voltage bus end VBUS of the power supply control chip 22 through the insertion detection module 23. At this time, the voltage of the insertion detection end CC of the power supply control chip 22 is pulled down. When the power supply control chip 22 detects that the voltage of the insertion detection end CC is lower than the first set voltage V1, the power supply control chip 22 controls the first switch M1 to be turned on, and the Type A port power supply circuit 2 starts to supply power to the powered device 5. The Type A port power supply circuit 2 exits the zero-power-consumption state. When the powered device 5 is disconnected, the voltage bus end VUBS of the power supply control chip 22 is open, which is equivalent to being disconnected. The voltage of the voltage bus end VUBS of the power supply control chip 22 is relatively high, the insertion detection module 23 is cut off, the power supply control chip 22 detects that the voltage of the insertion detection end CC is 3.3V, the voltage of the insertion detection end CC of the power supply control chip 22 is not pulled down, and the power supply control chip 22 controls the first switch M1 to be turned off. At this time, the Type A port power supply circuit 2 enters the zero-power-consumption state;

[0178] Wherein, the second set is less than the first set voltage;

[0179] In a specific embodiment, the second set voltage can also be set to be significantly smaller than the first set voltage. For example, when the first set voltage is 3.3V, the second set voltage can be 3.3V, i.e. the second set voltage can be set to 2 / 3 of the first set voltage.

[0180] In summary, the application is coupled to the voltage input terminal of the Type A interface through the first switch by the power supply, the voltage bus terminal of the power supply control chip is coupled to the voltage input terminal of the Type A interface, the power supply control terminal is coupled to the control terminal of the first switch, the insertion detection terminal is coupled to the voltage bus terminal through the insertion detection module, and the current detection terminal is coupled to the ground terminal of the Type A interface. In this way, the power supply control chip provides the first set voltage to the insertion detection terminal and uses the insertion detection module to only turn on when the voltage of the insertion detection terminal is higher than that of the voltage bus terminal. When the voltage value of the insertion detection terminal is lower than the first set voltage, it is judged that the powered device is accessed and the first switch is turned on, and the Type A port power supply circuit exits the zero power consumption state. When the power supply control chip detects that the current value of the first current of the ground terminal of the Type A interface is lower than the first current threshold, it is judged that the powered device is unplugged or fully charged, and the first switch is turned off, and the Type A port power supply circuit enters the zero power consumption state. Therefore, the Type A port power supply circuit of the application realizes the zero-watt standby function.

[0181] Although the application is disclosed as above, the application is not limited to this. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the application, and the protection scope of the application should be limited by the scope defined by the claims.

Claims

1. A Type A port power supply circuit, characterized by comprising: The application relates to a power supply control chip and a power supply control method. The power supply control chip comprises a voltage bus end, a power supply control end, an insertion detection end and a current detection end. The power supply control chip is configured to: provide a first set voltage to the insertion detection end, and control the first switch to be turned on when the voltage value of the insertion detection end is lower than the first set voltage; detect the size of a first current flowing through the ground end of the Type interface in real time, and control the first switch to be turned off when the current value of the first current is smaller than a first current threshold value; the insertion detection module is configured to be turned on only when the voltage of the insertion detection end is higher than the voltage bus end; otherwise, the insertion detection module is turned off. The power supply control chip comprises a comparison module, a current detection module and a micro control unit.

2. A Type A port power circuit according to claim 1, wherein, The first input end of the comparison module is coupled to the insertion detection end, the second input end of the comparison module receives the first set voltage output by the power supply control chip, the output end of the comparison module sends a first signal to the first end of the micro control unit, and the first signal comprises the comparison result of the voltage value of the insertion detection end and the voltage value of the first set voltage. The first end of the current detection module is coupled to the current detection end, the second end of the current detection module sends a second signal to the second end of the micro control unit, and the second signal comprises the current value information of the first current. The third end of the micro control unit is coupled to the control end of the first switch. The micro control unit is configured to: control the first switch to be turned on when the comparison result represents that the voltage value of the insertion detection end is lower than the first set voltage; control the first switch to be turned off when the current value signal of the first current represents that the current value of the first current is smaller than the first current threshold value. The insertion detection module comprises a diode, the anode of the diode is coupled to the insertion detection end of the power supply control chip, and the cathode of the diode is coupled to the voltage bus end of the power supply control chip.

3. A Type A port power supply circuit according to claims 1-2, characterized in that, The insertion detection module comprises a MOS tube, the first end of the MOS tube is coupled to the insertion detection end of the power supply control chip, the second end of the MOS tube is coupled to the voltage bus end of the power supply control chip, and the control end of the MOS tube is grounded.

4. A Type A port power supply circuit according to claims 1-2, characterized in that, The insertion detection module comprises a triode, the first end of the triode is coupled to the insertion detection end of the power supply control chip, the base of the triode is coupled to the voltage bus end of the power supply control chip, and the second end of the triode is grounded.

5. A Type A port power supply circuit according to claims 1-2, characterized in that, The insertion detection module comprises a second switch and a first resistor.

6. A Type A port power supply circuit according to claims 1-2, characterized in that, ​ The insertion detection end of the power supply control chip is coupled to the voltage bus end through the first resistor and the second switch in sequence, and the second switch control end of the power supply control chip is coupled to the control end of the second switch. The power supply control chip is further configured to: provide a first set voltage to the insertion detection end, and control the first switch to be turned on and the second switch to be turned off when the voltage value of the insertion detection end is lower than the first set voltage; real-time detect the size of the first current flowing through the ground end of the Type A interface, and control the first switch to be turned off and the second switch to be turned on when the current value of the first current is less than a first current threshold.

7. A Type A port power circuit according to claim 6, wherein, The insertion detection end includes a first sub-insertion detection end, a second sub-insertion detection end, and a third sub-insertion detection end. The first sub-insertion detection end is coupled to the first end of the first resistor and the first input end of the comparison module, the second end of the first resistor is coupled to the voltage bus end through the second switch, the second sub-insertion detection end is coupled to the first end of the first resistor, and the third sub-insertion detection end is coupled to the second end of the first resistor. The power supply control chip is further configured to: provide a first set voltage to the first sub-insertion detection end, and real-time detect the current of the first resistor through the second sub-insertion detection end and the third sub-insertion detection end, and obtain the voltage value of the first sub-insertion detection end when there is a current signal in the path where the first resistor is located, and control the first switch to be turned on and the second switch to be turned off when the voltage value of the first sub-insertion detection end is lower than the first set voltage; real-time detect the size of the first current flowing through the ground end of the Type A interface, and control the first switch to be turned off and the second switch to be turned on when the current value of the first current is less than a first current threshold.

8. A Type A port power circuit according to claim 1, wherein, The insertion detection end of the power supply control chip is a detection pin.

9. A Type A port power circuit according to claim 1, wherein, The insertion detection end of the power supply control chip is a normal interrupt pin.

10. A Type A port power circuit according to claim 9, wherein, The power supply control chip further includes an external power supply end, and the Type A interface power supply circuit further includes a second resistor, and the external power supply end is coupled to the normal interrupt pin through the second resistor; The first end of the second resistor is coupled to the external power supply end of the power supply control chip, and the second end of the second resistor is coupled to the insertion detection end of the power supply control chip; The external power supply end is configured to provide a first set voltage to the insertion detection end.

11. A Type A port power circuit according to claim 2, wherein, The power supply control chip further includes a charge pump, the first end of the charge pump is coupled to the third end of the micro control unit, and the second end of the charge pump is coupled to the control end of the first switch.

12. A Type A port power circuit according to claim 1, wherein, The Type A interface power supply circuit further includes a third resistor, and the current detection end includes a first sub-current detection end and a second sub-current detection end. The first end of the third resistor is coupled to the first sub-current detection end and the ground end of the power supply control chip. The second end of the third resistor is coupled to the second sub-current detection end and the ground end of the Type A interface.

13. A Type A port power circuit according to claim 1, wherein, The first switch is a power MOS tube, a first end of the power MOS tube is coupled to the power supply, a second end of the power MOS tube is coupled to a voltage input end of the Type A interface, and a control end of the power MOS tube is coupled to a power supply control end of the power supply control chip.

14. A Type A port power circuit according to claim 1, wherein, The power supply is a direct current power supply or an alternating current power supply.

15. A power supply device, characterized by comprising: The Type A to Type C line comprises a voltage bus connecting line and a ground line. The voltage bus end of the power supply control chip is coupled to the voltage bus connecting line of the Type A interface of the Type A to Type C line, the insertion detection end of the power supply control chip is coupled to the voltage bus connecting line through an insertion detection module, and the current detection end of the power supply control chip is coupled to the ground line through a third resistor.

16. The power supply device of claim 15, wherein The power supply control chip of the Type A power supply circuit further comprises a first communication protocol end and a second communication protocol end, and the Type A to Type C line further comprises a first protocol transmission line and a second protocol transmission line. The first protocol transmission line and the second protocol transmission line are respectively coupled to the first communication protocol end and the second communication protocol end.

17. The power supply device of claim 15, wherein In the case that the power receiving equipment is accessed, the power supply circuit in the power supply equipment is coupled to the power receiving equipment through the Type A to Type C line.

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