CN111537915A - Broken string detection circuitry and treasured that charges of polymorphic type charging wire - Google Patents
Broken string detection circuitry and treasured that charges of polymorphic type charging wire Download PDFInfo
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- CN111537915A CN111537915A CN202010421693.7A CN202010421693A CN111537915A CN 111537915 A CN111537915 A CN 111537915A CN 202010421693 A CN202010421693 A CN 202010421693A CN 111537915 A CN111537915 A CN 111537915A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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Abstract
The utility model provides a broken string detection circuitry of polymorphic type charging wire, is applied to the treasured that charges, and the treasured that charges includes two at least charging wires, and the charging wire includes first charging wire and second charging wire at least, and first charging wire includes power output port and agreement port, and the second charging wire includes power output port, and this circuit includes: the detection module comprises a first detection module and a second detection module; the first detection module is connected with the first charging wire, and the second detection module is connected with the second charging wire; an output module and a control chip; the control chip further comprises a pull-up level output end, and the pull-up level output end is connected between the power supply end and the third control switch. This application embodiment can carry out the broken string to the charging wire of different grade type simultaneously and detect, can in time detect the broken string condition of different grade type charging wire, and then improved the precious use reliability that charges. The disconnection detection circuit can also realize the automatic wake-up function of load access so as to improve the use convenience of products.
Description
Technical Field
The application relates to the field of electronic detection, in particular to a broken wire detection circuit of a plurality of types of charging wires and a charger baby.
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, since the charging cord is repeatedly used, the charging cord is often twisted or pulled by the user, and the connection between the charging cord and the internal circuit of the charger is easily damaged by the twisting or pulling action, so that the user cannot know the damage of the connection before using the charging cord and the charging cord is misused. Whether damage in order to detect the wiring, current broken string detection circuitry can't carry out normal detection to the broken string situation of the charging wire of different grade type simultaneously when using, and especially some charging wires still integrate have the agreement port, and the variety of circuit leads to having improved the probability that the charging wire damaged, has not only influenced user's use and has experienced, can improve operator's maintenance cost moreover.
Disclosure of Invention
The application discloses broken string detection circuitry and treasured that charges of polymorphic type charging wire can realize the broken string detection function of polymorphic type charging wire.
The embodiment of the application provides a broken string detection circuitry of polymorphic type charging wire, broken string detection circuitry is applied to in the treasured that charges, the treasured that charges includes two at least charging wires, the charging wire includes first charging wire and second charging wire at least, first charging wire includes power output port and agreement port, the second charging wire includes power output port, the circuit includes:
the detection module comprises a first detection module and a second detection module;
the first detection module comprises a plurality of detection resistors connected with the protocol port, and the plurality of detection resistors are connected with a VBUS output port of the power bank through a first control switch; the detection resistor and the first control switch are connected with a first A/D detection end of the control chip;
the second detection module comprises at least one pull-up resistor and a second control switch; one end of the pull-up resistor is connected with the power supply end of the power supply output port, and the other end of the pull-up resistor is connected with the second A/D detection end of the control chip through the second control switch; the second A/D detection end and the second control switch are grounded through a first divider resistor;
the output module comprises a third control switch, and the third control switch is connected between the power supply end and a VBUS output port of the power bank; and
the control chip comprises a control port; the control port is connected with the first control switch, the second control switch and the third control switch to control the on and off of the first control switch, the second control switch and the third control switch; the control chip further comprises a pull-up level output terminal connected between the power supply terminal and the third control switch.
Optionally, the power bank further includes a third charging wire;
the first charging line comprises a first power output port, the second charging line comprises a second power output port, and the third charging line comprises a third power output port;
the second power output port is connected with the second A/D detection end through a first pull-up resistor,
the third power output port is connected with the second A/D detection end through a second pull-up resistor;
the first pull-up resistor is connected in parallel with the second pull-up resistor.
Optionally, the resistance of the first pull-up resistor is different from the resistance of the second pull-up resistor.
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 first detection module includes:
the two ends of the first detection resistance unit are respectively connected with the power supply end and the grounding end and are 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 are 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:
a source electrode of the first MOS tube is connected with a VBUS end of the charger, a drain electrode of the first MOS tube is connected with the first A/D detection end, and a grid electrode of the first MOS tube is connected with one end of the third 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 second control switch includes a second MOS transistor;
the source electrode of the second MOS tube is connected with the first divider resistor, the drain electrode of the second MOS tube is connected with the pull-up resistor, and the grid electrode of the second MOS tube is connected with the third control switch and the second control port of the control chip.
Optionally, the third control switch includes a third MOS transistor and a switch transistor, wherein:
the grid electrode of the third MOS tube is connected with the collector electrode of the switching triode, and the source electrode of the third MOS tube is connected with the VBUS output port of the charge pal;
and the collector electrode of the switch triode is connected with the grid electrode of the third MOS tube, the emitter electrode of the switch triode is grounded, and the base electrode of the switch triode is connected with the second control switch and the control port of the control chip.
The application also discloses treasured charges, include:
a power source;
the charging lines at least comprise a first charging line and a second charging line, the first charging line comprises a power output port and a protocol port, and the second charging line comprises a power 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 of the multi-type charging wires.
By last knowing, the broken string detection circuitry of polymorphic type charging wire and the treasured that charges in this application can detect the first detection module and the second detection module of agreement port broken string condition through the setting for the treasured that charges can carry out the broken string to the charging wire of different grade type simultaneously and detect, can in time detect the broken string condition of different grade type charging wire, and then improved the precious use reliability that charges. 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.
Drawings
Fig. 1 is a schematic structural diagram of a multi-type charging line disconnection detection circuit according to an embodiment of the present application.
Fig. 2 is another schematic structural diagram of a circuit for detecting disconnection of multiple types of charging wires according to an embodiment of the present application.
Fig. 3 is a schematic diagram of another structure of a circuit for detecting disconnection of multiple types of charging wires according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of a power bank provided in 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 two at least charging wires, and the charging wire includes first charging wire and second charging wire at least, and this first charging wire includes power output port and agreement port, and this second charging wire includes power output port, and this charging wire and the treasured that charges between can not dismantle and be connected.
In an embodiment, the power bank may simultaneously include at least two different types of charging wires, for example, the charging port of the first charging wire may be a Lightning port of apple, a charging port of the first charging wire may be integrated with a power output port and a protocol port, and the charging port of the second charging wire may be a Type-C port and/or a Micro-B port of an android device, and a charging port of the second charging wire may be integrated with a power output port.
Referring to fig. 1, a structure of a disconnection detecting circuit for multiple types of charging wires according to an embodiment of the present application is shown. The disconnection detecting circuit of the multi-type charging wires can be applied to the charger baby as described above.
As shown in fig. 1, the disconnection detecting circuit of multiple types of charging wires includes a detecting module 1, an output module 2 and a control chip 3.
This detection module 1 includes first detection module 11 and second detection module 12, and first detection module 11 is connected with first charging wire, and second detection module 12 is connected with the second charging wire.
The first detection module 11 includes a plurality of detection resistors connected to the protocol port, and the plurality of detection resistors are connected to the VBUS output port of the power bank through the first control switch 111; the detection resistor and the first control switch 111 are connected to a first A/D detection terminal of the control chip 3. Wherein, the first A/D detection end is A/D1 in the figure.
The detection module 1 may perform voltage sampling through a plurality of detection resistors, and acquire a voltage change of the detection resistor through the first a/D detection 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 first detecting module 11 may divide the plurality of detecting resistors into a first detecting resistor unit and a second detecting resistor unit, wherein two ends of the first detecting resistor unit are respectively connected to the power supply terminal VOUT and the ground terminal GND, and are connected to the DM terminal of the protocol port. Two ends of the second detection resistance unit are respectively connected with the power supply end VOUT and the grounding end GND, and are connected with the 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 second detection module 12 includes at least one pull-up resistor and a second control switch 121; one end of the pull-up resistor is connected with the power supply end of the power supply output port, and the other end of the pull-up resistor is connected with the second A/D detection end of the control chip 3 through the second control switch 121; the second a/D detection terminal and the second control switch 121 are grounded through a first voltage dividing resistor. The second A/D detection end is A/D2 in the figure.
Wherein the second control switch 121 is used to control whether to perform the detection operation. The second detection module 12 may implement voltage division by matching a pull-up resistor with other resistors, and obtain a voltage change of the resistor by using the second a/D detection terminal of the control chip 3 to know whether a wire break occurs.
The output module 2 includes a third control switch 21, the third 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 third control switch 21 is connected to one end of the second control switch 121 through a pull-up resistor. 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.
When the treasured that charges is connected with the terminal, control chip 3 can judge whether the broken string condition appears through obtaining the change of second detection module 12 voltage value.
The control chip 3 is connected with the first control switch, the second control switch 121 and the third control switch 21 through control ports to control the on and off of the first control switch, the second control switch 121 and the third control switch 21; the control switch comprises a pull-up level output connected between the supply terminal and the third control switch 21.
Specifically, the pull-up level output end is connected with the power supply end Vout of the first charging line and the second charging line, and the power supply end Vout can be weakly pulled up to identify Load access through the pull-up level output end Load _ DET of the control chip 3 connected to the power supply end. When the first charging wire and the second charging wire are not connected to the terminal, the third control switch 21 is turned off, the power supply ends of the first charging wire and the second charging wire are in a suspended state, and the level of the power supply end Vout is equal to the pull-up level; when the load is connected, the level of the power supply terminal Vout of the charging line connected to the load is pulled down by the load. The pull-up level output end Load _ DET of the control chip 3 detects the change of the level, and the wake-up detection function when external loads of the first charging line and the second charging line are connected is achieved.
The control chip 3 can be an MCU chip with a second A/D detection 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 first charging wire of the power bank is disconnected, the control chip 3 controls the first control switch 111 and the third control switch 21 to be turned off, the control port I/O1 is used to supply power to the detection module 1, and then the first a/D detection end 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.
If it is disconnected to need to detect the precious second charging wire that charges, detect this second detection module 121's voltage condition through control chip 3's second AD sense terminal this moment to confirm whether disconnected condition appears in the second charging wire.
In some embodiments, when the control chip 3 detects a wire break through the first a/D detection terminal and the second a/D detection terminal, the warning module may be used to perform a warning function, for example, the LED lamp is used to perform on-off control, or the communication interface is used to send wire break information to other terminals, so as to perform a warning function.
The disconnection detection circuit of polymorphic type charging wire in this application can detect the first detection module and the second detection module of agreement port disconnection condition through the setting for the precious charging wire that charges can carry out the disconnection detection to the charging wire of different grade type simultaneously, can in time detect the disconnection condition of different grade type charging wire, and then has improved the precious use reliability that charges. 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 for multiple types of charging wires according to the embodiment of the present application is shown.
As shown in fig. 2, in some embodiments, the first charging line of the power bank includes a Lightning port with a protocol port, and the second charging line may include two charging lines.
In addition to the structure shown in fig. 1, the following structure is included:
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.
The first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 may be integrated in a circuit on one side of the Lightning port.
In one embodiment, the first control switch includes a first MOS transistor Q1, the second control switch includes a second MOS transistor Q2, and the third control switch includes a third MOS transistor Q3, wherein:
the source of the second MOS transistor Q2 is connected to the first voltage dividing resistor R7, the drain of the second MOS transistor Q2 is connected to the first pull-up resistor R5 and the second pull-up resistor R6, and the gate of the second MOS transistor Q2 is connected to the control port of the control chip. The control capability of the second MOS tube Q2 is utilized to improve the on-off control of the detection circuit by the control chip.
Specifically, the first pull-up resistor R5 and the second pull-up resistor R6 are connected in parallel, and when the charging line is in a disconnection state, different divided voltage values caused by resistance value changes are detected, so that whether the disconnection occurs can be judged. Specifically, the second a/D detection terminals may be the same or two, and the specific number may be designed according to actual requirements.
In order to improve the wire break detection effect, in an embodiment, the first pull-up resistor R5 and the second pull-up resistor R6 are connected to the same second a/D detection terminal, and the resistance of the first pull-up resistor R5 is different from the resistance of the second pull-up resistor R6.
When the two charging wires are not disconnected, the first pull-up resistor R5 and the second pull-up resistor R6 are in parallel connection, and form a voltage division relation with the first voltage division resistor R7, and the voltage value detected by the A/D detection end is V1;
when one of the two charging wires is disconnected, for example, the first charging wire, only the first pull-up resistor R5 and the first voltage dividing resistor R7 form a voltage dividing relationship, and the voltage value detected by the a/D detection terminal is V2;
when the other of the two charging lines is broken, for example, the second charging line, only the second pull-up resistor R6 and the first voltage dividing resistor R7 form a voltage dividing relationship, and the voltage value detected by the a/D detection terminal is V3.
The resistance value of the first pull-up resistor R5 is different from that of the second pull-up resistor R6, so that V1, V2 and V3 are different, and the wire breakage of which wire is detected can be judged through different voltage values detected by the control chip.
Referring to fig. 3, a further structure of the disconnection detection circuit for multiple types of charging wires according to the embodiment of the present application is shown.
The first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 may be integrated into a circuit on the Lightning port side.
In one embodiment, the third control switch 21 includes a third MOS transistor Q3 and a switching transistor Q4.
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 third control switch 21, and is connected to the source of the first MOS transistor Q1 through the fifth resistor R9. 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.
The source electrode of the third MOS transistor Q3 is connected to the VBUS output port of the charge pal; the collector of the switching transistor Q4 is connected with the gate of the third MOS transistor Q3, and the emitter of the switching transistor Q4 is grounded; the control port of the control chip 3 comprises a second control port, and the base of the switching transistor Q4 is connected with the second control port I/O2 of the control chip 3 and with the gate of the first MOS transistor Q1 of the first control switch.
The switching transistor Q4 is used as a switching element to control the on/off of the third MOS transistor Q3, so that the control capability of the control chip 3 on the third MOS transistor Q3 can be effectively improved.
Specifically, the gate of the first MOS transistor Q1 is further connected to the gate of the third MOS transistor Q3, and is connected to the source of the third MOS transistor Q3 through a sixth resistor R10.
The connection mode can ensure that the cooperation between the third MOS transistor Q3 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 through a resistor, and the cathode of the diode D1 is connected to the drain of the first MOS transistor Q1. In addition, a second voltage-dividing resistor R8 is provided between the cathode of the diode D1 and the detection end, and ESD (Electro-Static discharge) protection is performed on the diode D1 through the second voltage-dividing resistor R8, so that the high voltage at the detection end is prevented from breaking down the diode D1. Meanwhile, a capacitor C1 is arranged between the detection end and the source electrode of the first MOS transistor Q1, and the ESD protection effect on the first MOS transistor Q1 is also achieved. In addition, the first a/D detection port of the control chip 3 is connected to the positive electrode of the diode D1 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 sensing terminal can be prevented from flowing back into the first control port I/O1 and the first a/D sensing port of the control chip 3, thereby damaging the control chip 3.
In the working process of the embodiment shown in fig. 3, 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 Q4, and when the switching transistor Q4 is turned off, the third MOS transistor Q3 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 the VDD level to the outside, and the disconnection of the charging line is determined by detecting the voltage at the connection terminal DET _ AD1 of the first a/D detection port of the MCU, which is as follows:
when the DM, DP in the protocol port charges the supply power terminal DET1 of the protocol level, the VBUS of the motherboard is isolated from the supply power terminal DET1 by the first MOS transistor Q1. When the terminal is normally charged, the first MOS transistor Q1 is turned on to supply the DM and DP protocol levels to the power supply terminal DET 1. When the disconnection of the port is detected, the MOS2 is closed, and the disconnection of the Lightning port is detected through the cooperation of the I/O1 of the MCU and the A/D1.
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 diode D1.
When the protocol port is not in a disconnection state, the voltage V detected by the first A/D detection portDET1_AD；
VDET1_AD＝VFD1+(VOutput-VFD1)*R13/(R13+R12+Ra)；
When the protocol port is disconnected, the voltage V detected by the first A/D detection portDET1_AD；
VDET1_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 first A/D detection port, and if so, a prompt can be timely sent out. 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.
When the disconnection detection circuit is not connected to a Load, the control chip 3 controls the control port I/O2 to control the third control switch to be turned off, at this time, the power supply terminal VOUT is suspended, and the control chip 3 detects the connection of the Load by a pull-up level mode inside the pull-up level output port Load _ DET or 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 end VOUT is pulled down, the pull-up level output port Load _ DET of the MCU detects the level change, the third control switch is opened through the control port I/O2, the Load is discharged, and therefore the Load connection automatic awakening function of the disconnection detection circuit is achieved.
In another working process as in the embodiment of fig. 3, taking a charging line of an android system vendor as an example, the second charging line of the power bank includes two charging lines, where a power output end of the charging line may include a Type-C port and a Micro-B port, the control chip is an MCU in the figure, and the following cases may be included at this time:
1) the connection terminal DSG _ Ctrl of the control port I/O2 of the MCU is switched to a high level, so that the switching transistor Q4 and the first MOS transistor Q1 are simultaneously turned on. After the switching triode Q4 is conducted, the third MOS tube is conducted through the voltage division of the resistors R10 and R11 on VBUS, and power is supplied to the power supply end VOUT of the Type-C port and the Micro-B port. The first pull-up resistor R5 and the second pull-up resistor R6 are connected in parallel through VBUS and DET2, and divide the voltage of the power supply terminal VOUT with the first voltage dividing resistor R7 and the second voltage dividing resistor R8. MCU passes through the different voltage values that the link DET2_ AD of AD sense terminal detected, judges the broken string condition of Type-C port and Micro-B port, specifically as follows:
1. when the Type-C port and the Micro-B port are not disconnected, the voltage V detected by the second A/D detection endDET2_AD。
VDET2_AD＝VOUT*R7/[R7+R8+R5*R6/(R5+R6)]；
2. When the Type-C port is disconnected but the Micro-B port is not disconnected, the voltage detected by the second A/D detection end is VDET2_AD。
VDET2_AD＝VOUT*R7/[R7+R8+R6]；
3. When the Micro-B port is disconnected but the Type-C port is not disconnected, the voltage detected by the second A/D detection end is VDET2_AD；
VDET2_AD＝VOUT*R7/[R7+R8+R5]；
4. When the Type-C port and the Micro-B port are disconnected, the voltage detected by the second A/D detection end is VDET2_AD；
VDET2_AD＝0；
2) In normal standby, the MCU controls the control port I/O2 to close the third MOS transistor Q3, and V is at the momentOUTThe end is suspended, and the MCU detects the Load access by pulling up the level inside the pull-up level output end Load _ DET or using the output detection port (not shown in this figure) of the charge management IC. When the Load is not connected, the level of the power supply end VOUT is equal to the pull-up level, after the Load is connected, the pull-up level of the pull-up level output end Load _ DET is pulled down, the MCU detects the change of the pull-up level through the pull-up level output end Load _ DET, and the third MOS tube Q3 is opened through the control port I/O2 to discharge the Load (namely, the terminal is charged).
By last knowing, the broken string detection circuitry of polymorphic type charging wire and the treasured that charges in this application can detect the first detection module and the second detection module of agreement port broken string condition through the setting for the treasured that charges can carry out the broken string to the charging wire of different grade type simultaneously and detect, can in time detect the broken string condition of different grade type charging wire, and then improved the precious use reliability that charges.
Referring to fig. 4, a structure of a charger provided in an embodiment of the present application is shown.
In this application, this treasured that charges includes at least one charging wire, this charging wire and the precious undetachable connection that charges between.
The port of the charging wire is integrated with a power output port.
As shown in fig. 4, the power bank may be a shared power bank, and includes a power supply, a charging line, and a disconnection detection circuit.
The power source may be a rechargeable battery, such as a lithium battery, a nickel-metal hydride battery, etc., and the application does not limit the specific battery type.
This charging wire includes at least two, with the power electricity is connected, including at least two charging wires, the charging wire includes first charging wire and second charging wire at least, first charging wire includes power output port and agreement port, the second charging wire includes power output port. The port of the first charging line may be a Lightning port, and the power output port and a protocol port are integrated in the Lightning port. The power output port of the second charging wire can be connected with the terminal and can provide power for the terminal or perform functions of data transmission and the like. The port of this second charging wire can adopt the port of Type-C agreement and/or Micro-B agreement like smart mobile phone, intelligent panel computer, and power output port integrates in the port of Type-C agreement and/or Micro-B agreement.
The disconnection detection circuit is connected between the power supply and the charging wire. This broken string detection circuitry can be like fig. 1-3 the broken string detection circuitry of the polymorphic type charging wire, specific structure and function realize can refer to like fig. 1-3 the broken string detection circuitry of the polymorphic type charging wire, this application is no longer repeated here.
By last knowing, treasured charges in this application, the treasured that charges can carry out the broken string to the charging wire of different grade type simultaneously and detect, can in time detect the broken string condition of different grade type charging wire, and then has improved the precious use reliability that charges. 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.
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 (10)
1. The utility model provides a disconnected line detection circuitry of polymorphic type charging wire, a serial communication port, disconnected line detection circuitry is applied to in the treasured that charges, the treasured that charges includes two at least charging wires, the charging wire includes first charging wire and second charging wire at least, first charging wire includes power output port and agreement port, the second charging wire includes power output port, the circuit includes:
the detection module comprises a first detection module and a second detection module; the first detection module is connected with the first charging wire, and the second detection module is connected with the second charging wire;
the first detection module comprises a plurality of detection resistors connected with the protocol port, and the plurality of detection resistors are connected with a VBUS output port of the power bank through a first control switch; the detection resistor and the first control switch are connected with a first A/D detection end of the control chip;
the second detection module comprises at least one pull-up resistor and a second control switch; one end of the pull-up resistor is connected with the power supply end of the power supply output port, and the other end of the pull-up resistor is connected with the second A/D detection end of the control chip through the second control switch; the second A/D detection end and the second control switch are grounded through a first divider resistor;
the output module comprises a third control switch, and the third control switch is connected between the power supply end and a VBUS output port of the power bank; and
the control chip comprises a control port; the control port is connected with the first control switch, the second control switch and the third control switch to control the on and off of the first control switch, the second control switch and the third control switch; the control chip further comprises a pull-up level output terminal connected between the power supply terminal and the third control switch.
2. The disconnection detecting circuit of a plurality of types of charging wires according to claim 1, wherein:
the power bank further comprises a third charging wire;
the first charging line comprises a first power output port, the second charging line comprises a second power output port, and the third charging line comprises a third power output port;
the second power output port is connected with the second A/D detection end through a first pull-up resistor,
the third power output port is connected with the second A/D detection end through a second pull-up resistor;
the first pull-up resistor is connected in parallel with the second pull-up resistor.
3. The circuit for detecting disconnection of multiple types of charging wires according to claim 2, wherein a resistance value of the first pull-up resistor is different from a resistance value of the second pull-up resistor.
4. The circuit for detecting disconnection of multiple types of charging wires according to claim 1 or 2, wherein the protocol port comprises a DM terminal and a DP terminal, and the power output port comprises a power supply terminal and a ground terminal;
the first detection module includes:
the two ends of the first detection resistance unit are respectively connected with the power supply end and the grounding end and are 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 are connected with the DP end of the protocol port.
5. The disconnection detecting circuit of a plurality of types of charging wires according to claim 4, 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.
6. The disconnection detecting circuit of a plurality of types of charging wires according to claim 1, wherein:
the first control switch includes:
a source electrode of the first MOS tube is connected with a VBUS end of the charger, a drain electrode of the first MOS tube is connected with the first A/D detection end, and a grid electrode of the first MOS tube is connected with one end of the third 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.
7. The disconnection detecting circuit of a plurality of types of charging wires according to claim 6, 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.
8. The disconnection detecting circuit of a plurality of types of charging wires according to claim 1, wherein:
the second control switch comprises a second MOS tube;
the source electrode of the second MOS tube is connected with the first divider resistor, the drain electrode of the second MOS tube is connected with the pull-up resistor, and the grid electrode of the second MOS tube is connected with the third control switch and the second control port of the control chip.
9. The circuit for detecting disconnection of multiple types of charging wires according to claim 1 or 2, wherein the third control switch comprises a third MOS transistor and a switching transistor, wherein:
the grid electrode of the third MOS tube is connected with the collector electrode of the switching triode, and the source electrode of the third MOS tube is connected with the VBUS output port of the charge pal;
and the collector electrode of the switch triode is connected with the grid electrode of the third MOS tube, the emitter electrode of the switch triode is grounded, and the base electrode of the switch triode is connected with the second control switch and the control port of the control chip.
10. A power bank, comprising:
a power source;
the charging lines at least comprise a first charging line and a second charging line, the first charging line comprises a power output port and a protocol port, and the second charging line comprises a power output port; and
the disconnection detection circuit is connected between the power supply and the charging wire;
the disconnection detecting circuit of the multi-type charging wire according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010421693.7A CN111537915A (en) | 2020-05-18 | 2020-05-18 | Broken string detection circuitry and treasured that charges of polymorphic type charging wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010421693.7A CN111537915A (en) | 2020-05-18 | 2020-05-18 | Broken string detection circuitry and treasured that charges of polymorphic type charging wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111537915A true CN111537915A (en) | 2020-08-14 |
Family
ID=71968819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010421693.7A Withdrawn CN111537915A (en) | 2020-05-18 | 2020-05-18 | Broken string detection circuitry and treasured that charges of polymorphic type charging wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111537915A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305460A (en) * | 2020-10-22 | 2021-02-02 | 深圳来电科技有限公司 | On-off detection circuit and on-off detection method for charging wire of mobile power supply |
| CN117526231A (en) * | 2024-01-08 | 2024-02-06 | 赛卓电子科技(上海)股份有限公司 | Broken wire protection circuit and sensor |
-
2020
- 2020-05-18 CN CN202010421693.7A patent/CN111537915A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305460A (en) * | 2020-10-22 | 2021-02-02 | 深圳来电科技有限公司 | On-off detection circuit and on-off detection method for charging wire of mobile power supply |
| CN117526231A (en) * | 2024-01-08 | 2024-02-06 | 赛卓电子科技(上海)股份有限公司 | Broken wire protection circuit and sensor |
| CN117526231B (en) * | 2024-01-08 | 2024-03-26 | 赛卓电子科技(上海)股份有限公司 | Broken wire protection circuit and sensor |
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Application publication date: 20200814 |