CN212872844U - Charge pal with protocol port and disconnection detection circuit thereof - Google Patents
Charge pal with protocol port and disconnection detection circuit thereof Download PDFInfo
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- CN212872844U CN212872844U CN202020836300.4U CN202020836300U CN212872844U CN 212872844 U CN212872844 U CN 212872844U CN 202020836300 U CN202020836300 U CN 202020836300U CN 212872844 U CN212872844 U CN 212872844U
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Abstract
The application discloses this application provides a take agreement port treasured that charges and broken string detection circuitry thereof, it includes at least one charging wire of taking the agreement port to charge the treasured, the circuit includes: the detection module comprises a plurality of detection resistors connected with the protocol port, and the detection resistors are connected with the processing chip through a first control switch; the detection end is connected between the detection resistor and the first control switch; the output module comprises a second control switch, the second control switch is connected between a power supply output port of a charging wire and a VBUS output port of the charger, and one end of the second control switch is connected with one end of the first control switch; and a control chip. This application embodiment can in time detect the broken string condition of charging wire, and then realize the broken string detection function to the charging wire. In addition, the disconnection detection circuit can also realize the function of automatic awakening of load access so as to improve the use convenience of the product.
Description
Technical Field
The application relates to the field of electronic detection, in particular to a charger baby with a protocol port and a disconnection detection circuit thereof.
Background
In current precious market that charges, especially in the precious market that charges of sharing, because the precious use that charges of sharing needs to be shared repeatedly, if the charging wire can be dismantled, then be stolen by a small number of users easily, and then improve the operation cost of the precious operator that charges of sharing. Consequently, the producer can fix the charging wire and form an organic whole in the treasured that charges to reduce the stolen problem of charging wire.
However, because the charging wire is in a state of being used repeatedly, the charging wire is often twisted or pulled by a user, and the connection between the charging wire and the internal circuit of the charging pal is easily damaged due to the twisting or pulling action, so that the user cannot know the damage of the connection before using the charging pal and is misused.
SUMMERY OF THE UTILITY MODEL
The application discloses take agreement port to charge treasured and broken string detection circuitry thereof can realize improving the precious reliability that charges to the broken string detection function of polymorphic type charging wire simultaneously.
The embodiment of the application provides a precious disconnected line detection circuitry charges with agreement port, it includes at least one charging wire with agreement port to charge precious, the circuit includes:
the detection module comprises a plurality of detection resistors connected with the protocol port, and the detection resistors are connected with a VBUS output port of the power bank through a first control switch; the detection end is connected between the detection resistor and the first control switch and is connected with the A/D end of the control chip;
the output module comprises a second control switch, the second control switch is connected between a power supply output port of the charging wire and a VBUS output port of the charge pal, and one end of the second control switch is connected with one end of the first control switch; and
the control chip is in control connection with the first control switch and the second control switch through a control port so as to control the opening and closing of the first control switch and the second control switch; the control switch includes a pull-up level output connected between the supply terminal and the second control switch.
Optionally, the protocol port includes a DM terminal and a DP terminal, and the power output port includes a power supply terminal and a ground terminal;
the detection module comprises:
the two ends of the first detection resistance unit are respectively connected with the power supply end and the grounding end and connected with the DM end of the protocol port; and
and two ends of the second detection resistance unit are respectively connected with the power supply end and the grounding end and connected with the DP end of the protocol port.
Optionally, the first detection resistance unit includes a first resistance and a second resistance connected in series, and the DM terminal is connected between the first resistance and the second resistance;
the second detection resistance unit comprises a third resistor and a fourth resistor which are connected in series, and the DP end is connected between the third resistor and the fourth resistor.
Optionally, the first control switch includes:
the source electrode of the first MOS tube is connected with the VBUS end of the charger, the drain electrode of the first MOS tube is connected with the detection end, and the grid electrode of the first MOS tube is connected with one end of the second control switch;
the control port of the control chip comprises a first control port, and the first control port is connected with the drain electrode of the first MOS tube.
Optionally, a diode is disposed between the first control port and the drain of the first MOS transistor, an anode of the diode is connected to the first control port, and a cathode of the diode is connected to the drain of the first MOS transistor.
Optionally, the a/D terminal of the control chip is connected to the anode of the diode.
Optionally, the second control switch includes:
the drain electrode of the second MOS tube is connected with the power supply output port of the charging wire, and the source electrode of the second MOS tube is connected with the VBUS output port of the charge pal; and
a collector of the switching triode is connected with the grid electrode of the second MOS tube, and an emitter of the switching triode is grounded;
the control port of the control chip comprises a second control port, and the base electrode of the switching triode is connected with the second control port of the control chip.
The embodiment of the application further provides a precious charging device with a protocol port, which includes:
a power source;
the charging wire is electrically connected with the power supply and is integrated with a protocol port and a power supply output port; and
the disconnection detection circuit is connected between the power supply and the charging wire;
the disconnection detection circuit is the disconnection detection circuit with the protocol port charger bank.
By last knowing, the detection module who is connected with the agreement port of output module and charging wire through setting up in this application takes agreement port treasured that charges and broken string detection circuitry thereof utilizes first control switch and second control switch to carry out the control that detects the function, can in time detect the broken string condition of charging wire, and then realizes the broken string detection function to the charging wire. In addition, this treasured that charges can also realize the automatic function of awakening up of load access to improve the convenience of use of product.
Drawings
Fig. 1 is a schematic structural diagram of a disconnection detection circuit with a protocol port charger baby according to an embodiment of the present application.
Fig. 2 is another schematic structural diagram of a disconnection detection circuit with a protocol port charger baby according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a power bank with a protocol port according to an embodiment of the present application.
Detailed Description
The following detailed description of the preferred embodiments of the present application, taken in conjunction with the accompanying drawings, will make the advantages and features of the present application more readily appreciated by those skilled in the art, and thus will more clearly define the scope of the invention.
In this application, this treasured that charges includes at least one charging wire of taking the agreement port, this charging wire and the precious undetachable connection that charges between.
The port of this charging wire has integrateed agreement port and power output port, and this agreement port can be the apple institute makes the protocol port that charges, also can be other communication protocol ports, and this application does not limit to this.
Referring to fig. 1, a structure of a disconnection detection circuit with a protocol port charger baby according to an embodiment of the present application is shown.
As shown in fig. 1, the disconnection detection circuit with a protocol port charger baby includes a detection module 1, an output module 2 and a control chip 3.
The detection module 1 comprises a plurality of detection resistors connected with a protocol port, and the plurality of detection resistors are connected with a VBUS output port of the power bank through a first control switch 11; the detection circuit also comprises a detection end connected between the detection resistor and the first control switch 11, and the detection end is connected with the A/D end of the control chip 3.
The detection module 1 may perform voltage sampling through a plurality of detection resistors, and acquire voltage change of the detection resistors by using the a/D terminal of the control chip 3 to know whether a wire break occurs.
In one embodiment, the protocol port includes a DM terminal and a DP terminal, and the power output port includes a power supply terminal VOUT and a ground terminal GND;
the detection module 1 includes a first detection resistance unit and a second detection resistance unit, wherein two ends of the first detection resistance unit are respectively connected to the power supply terminal VOUT and the ground terminal GND of the power output port, and are connected to the DM terminal of the protocol port. Two ends of the second detection resistance unit are respectively connected with a power supply end VOUT and a grounding end GND of the power supply output port, and are connected with a DP end of the protocol port.
When the disconnection condition of the protocol port occurs, the voltage difference different from the conduction state can be formed by arranging the two groups of detection resistance units, so that the protocol port can be judged to be in the disconnection state according to the voltage change.
The output module 2 includes a second control switch 21, the second control switch 21 is connected between the power output port of the charging line and the VBUS output port of the charger, and one end of the second control switch 21 is connected to one end of the first control switch 11. This output module 2 mainly provides the electric energy output for precious charging wire charges.
The VBUS is arranged on a mainboard of the charging pal, and forms a power supply loop with a battery of the charging pal and a ground end GND to realize power output of the charging pal.
The control chip 3 is in control connection with the first control switch 11 and the second control switch 21 through the control port to control the on/off of the first control switch 11 and the second control switch 21. The control switch includes a pull-up level output terminal Load _ DET connected between the supply terminal VOUT and the second control switch 21.
The control chip 3 can be an MCU chip with an A/D end and a control port I/O, the model of the MCU can be controlled by adopting common MCU models in the field, and the technical effect of the application is not influenced between different models.
In the implementation process, if it is necessary to detect whether the power bank is disconnected, the control chip 3 controls the first control switch 11 and the second control switch 21 to be turned off, the control port I/O is used for supplying power to the detection module 1, and then the a/D terminal of the control chip 3 detects the voltage change condition of the detection module 1, so as to determine whether the protocol port is disconnected.
When the charger needs to work, the first control switch 11 and the second control switch 21 are turned on again, so that the charger can enable the protocol port and the power output port to be normally charged with the charging port of the terminal or perform data transmission.
In some embodiments, when the control chip 3 detects a wire break through the a/D terminal, the warning module may perform warning, for example, perform on/off control through an LED lamp, or send the wire break information to other terminals through the communication interface, so as to perform a warning function.
When the disconnection detection circuit is not connected to a Load, the control chip 3 controls the control port I/O to control the second control switch 21 to be turned off, at this time, the power supply terminal VOUT is suspended, and the control chip 3 performs weak pull-up on the power supply terminal VOUT through the pull-up level output port Load _ DET or detects the Load connection by using an output detection port (not shown in the figure) of the charge management IC. When the load is not connected, the level of the power supply terminal VOUT is equal to the pull-up level.
When the disconnection detection circuit is connected to a Load, the level of the power supply terminal VOUT is pulled down, the pull-up level output port Load _ DET of the MCU detects the level change, the second control switch 21 is opened through the control port I/O of the MCU, and the Load is discharged, so that the Load connection awakening function of the disconnection detection circuit is realized.
The precious disconnected line detection circuitry that charges of area agreement port in this application utilizes first control switch 11 and second control switch 21 to carry out the control that detects the function through setting up detection module 1 of being connected with the agreement port of output module 2 and charging wire, can in time detect the disconnected line condition of charging wire, and then realizes the disconnected line detection function to the charging wire. In addition, the disconnection detection circuit can also realize the function of automatic awakening of load access so as to improve the use convenience of the product.
Referring to fig. 2, another structure of the disconnection detection circuit with a protocol port charger according to an embodiment of the present application is shown.
As shown in fig. 2, the disconnection detecting circuit with a protocol port charger includes the following structure in addition to the structure shown in fig. 1, wherein the port of the charging line may be a Lightning port, and the protocol port is located in the Lightning port.
The first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 may be integrated into a circuit of the Lightning port.
The first detection resistor unit comprises a first resistor R1 and a second resistor R2 which are mutually connected in series, and the DM end is connected between the first resistor R1 and the second resistor R2; the second detection resistor unit comprises a third resistor R3 and a fourth resistor R4 which are connected in series, and the DP end is connected between the third resistor R3 and the fourth resistor R4 so as to detect the disconnection condition of the protocol port through different voltage changes.
In one embodiment, the first control switch 11 includes a first MOS transistor Q1, wherein:
the source of the first MOS transistor Q1 is connected to the VBUS terminal of the charger, the drain of the first MOS transistor Q1 is connected to the detection terminal, the gate of the first MOS transistor Q1 is connected to one terminal of the second control switch 21, and is connected to the source of the first MOS transistor Q1 through a fifth resistor R5. The control port of the control chip 3 comprises a first control port I/O1, and the first control port I/O1 is connected with the drain of the first MOS transistor Q1.
In one embodiment, the second control switch 21 includes a second MOS transistor Q2 and a switching transistor Q3.
The drain of the second MOS transistor Q2 is connected to the power output port of the charging line, and the source of the second MOS transistor Q2 is connected to the VBUS output port of the charge pal; the collector of the switching transistor Q3 is connected with the gate of the second MOS transistor Q2, and the emitter of the switching transistor Q3 is grounded; the control port of the control chip 3 comprises a second control port, and the base of the switching transistor Q3 is connected with the second control port of the control chip 3.
The switching transistor Q3 is used as a switching element to control the on/off of the second MOS transistor Q2, so that the control capability of the control chip 3 on the second MOS transistor Q2 can be effectively improved.
Specifically, the gate of the first MOS transistor Q1 is further connected to the gate of the second MOS transistor Q2, and is connected to the source of the second MOS transistor Q2 through a seventh resistor R6.
The connection mode can ensure that the matching between the second MOS transistor Q2 and the first MOS transistor Q1 is more reliable.
In one embodiment, a diode D1 is disposed between the first control port I/O1 and the drain of the first MOS transistor Q1, the anode of the diode D1 is connected to the first control port I/O1, and the cathode of the diode D1 is connected to the drain of the first MOS transistor Q1. In addition, the anode of the diode D1 is connected to the first control port I/O1 through a sixth resistor R8, a seventh resistor R7 is provided between the cathode and the detection end, and the diode D1 can be protected from ESD (Electro-Static discharge) through the seventh resistor R7, so that the diode D1 is prevented from being broken down by high voltage at the detection end. Meanwhile, a capacitor C1 is arranged between the source and the drain of the first MOS transistor Q1, and the ESD protection effect on the first MOS transistor Q1 is also achieved. In addition, the a/D terminal of the control chip 3 is connected to the positive electrode of the diode D1, so as to obtain the voltage value of the detection module 1 through the first MOS transistor Q1.
It can be understood that by disposing the diode D1 between the control chip 3 and the first MOS transistor Q1, the voltage at the detection terminal can be prevented from flowing back into the control port I/O and a/D terminals of the control chip 3, thereby damaging the control chip 3.
In the working process of the embodiment shown in fig. 2, taking the charging line of apple company as an example, the control chip 3 is an MCU in the drawing, when detecting the disconnection of the charging line, the second control port I/O2 of the MCU switches the connection terminal DSG _ Ctrl to the low level to turn off the switching transistor Q3, and after turning off the switching transistor Q3, the second MOS transistor Q2 is turned off, and the first MOS transistor Q1 is also turned off, at this time, the connection terminal Output of the first control port I/O1 of the MCU outputs VDD to the outside, and the disconnection of the charging line is determined by detecting the voltage of the connection terminal DET _ AD of the a/D terminal of the MCU, which is specifically as follows:
when the DM, DP in the protocol port charges the supply power terminal DET of the protocol level, the VBUS of the motherboard is isolated from the supply power terminal DET by the first MOS transistor Q1. When the terminal is normally charged, the first MOS transistor Q1 is turned on to provide the DM and DP protocol levels for the power supply terminal DET. When the disconnection of the port is detected, the first MOS transistor Q1 is closed, and the disconnection of the Lightning port is detected through the I/O1 and the A/D1 ports of the MCU in a matching manner.
Wherein the equivalent resistance R of R1, R2, R3 and R4a＝[(R1+R2)*(R3+R4)]/(R1+R3+R2+R4)，VFD1Is the forward conduction voltage of the diode.
When the disconnection condition of the protocol port does not occur, the voltage V detected by the A/D endDET_AD；
VDET_AD＝VFD1+(VOutput-VFD1)*R8/(R8+R7+Ra)；
When the protocol port is disconnected, the voltage V detected by the A/D endDET_AD；
VDET_AD＝VOutput。
The MCU can identify whether the current protocol port is in a disconnection state or not through different voltage values detected by the A/D end, and if so, a prompt can be sent out in time. This application in time detects the broken string condition of charging wire, and then realizes detecting the function to the broken string of charging wire to it is still misused to avoid charging the treasured under the broken string state.
Referring to fig. 3, a structure of a charger with a protocol port according to an embodiment of the present application is shown.
In this application, this treasured that charges includes at least one charging wire of taking the agreement port, this charging wire and the precious undetachable connection that charges between.
The protocol port and the power output port are integrated in the port of the charging wire, the protocol port can be a charging protocol port established by apple corporation, and also can be other communication protocol ports, and the application does not limit the port.
As shown in fig. 3, the protocol-ported power pack 100 includes a power supply 110, a charging cable 130, and a disconnection detection circuit 120.
The power source 110 may be a rechargeable battery, such as a lithium battery, a nickel metal hydride battery, etc., and the specific battery type is not limited in this application.
The charging line 130 comprises at least one charging line, and the charging line 130 is electrically connected with the power supply 110 and integrated with a protocol port and a power supply output port. The power output port and the protocol port can be connected with the terminal and provide power for the terminal or perform functions of data transmission and the like. For example, an electronic product using a Lightning protocol port, such as a smart phone and a smart tablet of apple inc.
The disconnection detection circuit 120 is connected between the power supply 110 and the charging wire 130. The disconnection detecting circuit 120 may be the disconnection detecting circuit 120 with the protocol port charger baby 100 as shown in fig. 1-2, and for specific structural and functional implementation, reference may be made to the disconnection detecting circuit 120 with the protocol port charger baby 100 as shown in fig. 1-2, which is not described herein again.
This take agreement port treasured that charges through the detection module who sets up the agreement port connection with output module and charging wire, utilizes first control switch and second control switch to carry out the control that detects the function, can in time detect the broken string condition of charging wire, and then realizes the broken string detection function to the charging wire. In addition, the power bank with the protocol port can also realize the function of automatic wake-up of load access so as to improve the use convenience of the product.
The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the knowledge of those skilled in the art.
Claims (8)
1. The utility model provides a precious disconnected line detection circuitry charges with agreement port, the precious charging wire that includes at least one area agreement port that charges, its characterized in that, the circuit includes:
the detection module comprises a plurality of detection resistors connected with the protocol port, and the detection resistors are connected with a VBUS output port of the power bank through a first control switch; the detection end is connected between the detection resistor and the first control switch and is connected with the A/D end of the control chip;
the output module comprises a second control switch, the second control switch is connected between a power supply output port of the charging wire and a VBUS output port of the charge pal, and one end of the second control switch is connected with one end of the first control switch; and
the control chip is in control connection with the first control switch and the second control switch through a control port so as to control the opening and closing of the first control switch and the second control switch; the control switch includes a pull-up level output connected between a supply terminal and the second control switch.
2. The circuit for detecting disconnection of a power bank with a protocol port according to claim 1, wherein the protocol port comprises a power supply terminal, a ground terminal, a DM terminal, and a DP terminal;
the detection module comprises:
the two ends of the first detection resistance unit are connected with the power supply end and the grounding end of the protocol port and are connected with the DM end of the protocol port; and
and two ends of the second detection resistance unit are connected with the power supply end and the grounding end of the protocol port and are connected with the DP end of the protocol port.
3. The disconnection detection circuit of claim 2, wherein:
the first detection resistance unit comprises a first resistor and a second resistor which are connected in series, and the DM end is connected between the first resistor and the second resistor;
the second detection resistance unit comprises a third resistor and a fourth resistor which are connected in series, and the DP end is connected between the third resistor and the fourth resistor.
4. The disconnection detection circuit of claim 1, wherein:
the first control switch includes:
the source electrode of the first MOS tube is connected with the VBUS end of the charger, the drain electrode of the first MOS tube is connected with the detection end, and the grid electrode of the first MOS tube is connected with one end of the second control switch;
the control port of the control chip comprises a first control port, and the first control port is connected with the drain electrode of the first MOS tube.
5. The disconnection detection circuit of claim 4, wherein:
and a diode is arranged between the first control port and the drain electrode of the first MOS tube, the anode of the diode is connected with the first control port, and the cathode of the diode is connected with the drain electrode of the first MOS tube.
6. The circuit of claim 5, wherein the A/D terminal of the control chip is connected to the anode of the diode.
7. The disconnection detection circuit of claim 1, wherein the second control switch comprises:
the drain electrode of the second MOS tube is connected with the power supply output port of the charging wire, and the source electrode of the second MOS tube is connected with the VBUS output port of the charge pal; and
a collector of the switching triode is connected with the grid electrode of the second MOS tube, and an emitter of the switching triode is grounded;
the control port of the control chip comprises a second control port, and the base electrode of the switching triode is connected with the second control port of the control chip.
8. A protocol port charger baby, comprising:
a power source;
the charging wire is electrically connected with the power supply and is integrated with a protocol port and a power supply output port; and
the disconnection detection circuit is connected between the power supply and the charging wire;
the disconnection detection circuit is the disconnection detection circuit with the protocol port charger baby according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020836300.4U CN212872844U (en) | 2020-05-18 | 2020-05-18 | Charge pal with protocol port and disconnection detection circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020836300.4U CN212872844U (en) | 2020-05-18 | 2020-05-18 | Charge pal with protocol port and disconnection detection circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212872844U true CN212872844U (en) | 2021-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020836300.4U Active CN212872844U (en) | 2020-05-18 | 2020-05-18 | Charge pal with protocol port and disconnection detection circuit thereof |
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| Country | Link |
|---|---|
| CN (1) | CN212872844U (en) |
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2020
- 2020-05-18 CN CN202020836300.4U patent/CN212872844U/en active Active
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