CN212781181U - Output detection circuit - Google Patents
Output detection circuit Download PDFInfo
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- CN212781181U CN212781181U CN202021216611.7U CN202021216611U CN212781181U CN 212781181 U CN212781181 U CN 212781181U CN 202021216611 U CN202021216611 U CN 202021216611U CN 212781181 U CN212781181 U CN 212781181U
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Abstract
The utility model relates to a technical field that charges discloses an output detection circuitry, can detect the inserted state of delivery outlet. The utility model comprises a detection module and a first power switch module, wherein the power end of the detection module and the power end of the first power switch module are respectively connected with a first power supply; the first acquisition end of the detection module and the output end of the first power switch module are respectively connected with the output port of the charging device, the second acquisition end of the detection module is connected with the state output end of the first power switch module, the enabling end of the detection module and the enabling end of the first power switch module are respectively connected with the control module of the charging device, and the detection output end of the detection module is connected with the control module of the charging device. The utility model discloses utilize detection module and first switch module to realize detecting charging device's delivery outlet, can judge whether insert terminal equipment to judge according to the electric current condition of delivery outlet and be the needs quick charge or ordinary charging, thereby provide corresponding voltage.
Description
Technical Field
The utility model relates to a technical field that charges, especially an output detection circuit.
Background
With the increasing popularization of mobile terminals and the rapid development of quick charging technology, more and more terminal devices need to be quickly charged to shorten the charging time when being charged, and the design of a power supply with a single power supply and multiple output ports is more and more popular. In the structure, one power supply is provided, and power can be supplied to a plurality of output ports simultaneously. Such a power supply is cost and functional. Present most charging device, when one of them is when delivery outlet access apparatus, its inside control module can't judge the insertion state of other a plurality of delivery outlets, thereby can't accurately the connection status of other a plurality of delivery outlets, only can control the output state of other a plurality of delivery outlets through the corresponding switch of manual control, furthermore, when only one delivery outlet output is fast charging voltage, other delivery outlets then can not provide charging voltage, and when at least two delivery outlets are when the power supply, then all delivery outlets can only export ordinary voltage simultaneously, and can't provide the voltage that is higher than ordinary voltage, in order to satisfy the demand of filling soon.
Disclosure of Invention
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an output detection circuitry can accurately detect the inserted state of delivery outlet, still can be according to the ordinary voltage of inserted state control delivery outlet output or fill voltage soon.
According to the embodiment of the utility model, the output detection circuit comprises a detection module and a first power switch module, wherein the detection module is provided with a power end, an enabling end, a first collecting end, a second collecting end and a detection output end; the first power switch module is provided with a power end, an enabling end, an output end and a state output end; the power end of the detection module and the power end of the first power switch module are respectively electrically connected with a first power supply; the detection module is characterized in that the first acquisition end and the first power switch module are electrically connected with the output end of the charging device respectively, the second acquisition end and the first power switch module are electrically connected with the state output end of the detection module, the enabling end of the detection module and the enabling end of the first power switch module are electrically connected with the control module of the charging device respectively, and the detection output end of the detection module is electrically connected with the control module of the charging device.
According to the utility model discloses output detection circuitry has following beneficial effect at least: the detection module and the first power switch module can be used for detecting the output port of the charging device, whether the terminal equipment is inserted for charging can be judged, and whether the terminal equipment needs to be charged quickly or normally can be judged according to the current condition of the output port, so that corresponding voltage is provided for the terminal equipment.
According to some embodiments of the present invention, the detection module comprises a MOS transistor M2, a comparator U1, a comparator U2 and an or gate U5, a gate of the MOS transistor M2 is the second collecting end of the detection module, a source of the MOS transistor M2 is the power supply end of the detection module, and a drain of the MOS transistor M2 is grounded through a resistor R3; the inverting input end of the comparator U1 is connected with a first reference voltage, and the non-inverting input end of the comparator U1 is electrically connected with the drain electrode of the MOS transistor M2; the inverting input end of the comparator U2 is the first collecting end of the detection module, and the non-inverting input end of the comparator U2 is connected with a second reference voltage; a first input terminal of the or gate U5 is electrically connected to the output terminal of the comparator U1, a second input terminal of the or gate U5 is electrically connected to the output terminal of the comparator U2, and an output terminal of the or gate U5 is a detection output terminal of the detection module; wherein the enable terminal of the comparator U1 and the power supply terminal of the comparator U2 are both the enable terminals of the detection module.
According to some embodiments of the invention, the first power switch module comprises a MOS transistor M1 and an amplifier U3: the source of the MOS transistor M1 is the power supply end of the first power switch module, and the drain of the MOS transistor M1 is the output end of the first power switch module; the inverting input end of the amplifier U3 is connected with a third reference voltage, the non-inverting input end of the amplifier U3 is electrically connected with the drain of the MOS transistor M1 through a resistor R1, the non-inverting input end of the amplifier U3 is grounded through a resistor R2, the output end of the amplifier U3 is the state output end of the first power switch module, the output end of the amplifier U3 is electrically connected with the gate of the MOS transistor M1, and the enable end of the amplifier U3 is the enable end of the first power switch module.
According to some embodiments of the present invention, the first power switch module comprises a MOS transistor M3 and a buffer driver U4, a source of the MOS transistor M3 is a power supply terminal of the first power switch module, and a drain of the MOS transistor M3 is the output terminal of the first power switch module; the input end of the buffer driver U4 is the enable end of the first power switch module, the output end of the buffer driver U4 is the state output end of the first power switch module, and the output end of the buffer driver U4 is electrically connected with the gate of the MOS transistor M3.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic circuit block diagram of an output detection circuit according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a circuit structure connection of a detection module of the output detection circuit shown in FIG. 1;
FIG. 3 is a first circuit configuration connection diagram of a first power switch module of the output detection circuit shown in FIG. 1;
FIG. 4 is a second circuit configuration connection diagram of the first power switch module of the output detection circuit shown in FIG. 1;
fig. 5 is a schematic block diagram of an output detection circuit according to a second embodiment of the present invention applied to a charging device;
fig. 6 is a schematic block diagram of a charging device to which an output detection circuit according to a third embodiment of the present invention is applied;
fig. 7 is a schematic diagram of a circuit structure connection between the first power switch module and the detection module according to an embodiment of the present invention.
Reference numerals: the power supply device comprises an output detection circuit 100, a detection module 110, a first power switch module 120, a charging device 200, a control module 210, a power module 220, a second power switch module 230 and an output port 240.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1, an output detection circuit 100 according to a first embodiment of the present invention includes a detection module 110 and a first power switch module 120, wherein the detection module 110 has a power end, an enable end, a first collecting end, a second collecting end, and a detection output end; the first power switch module 120 has a power end, an enable end, an output end, and a status output end; the power end of the detection module 110 and the power end of the first power switch module 120 are electrically connected to the first power source, respectively; the first collecting end of the detecting module 110 and the output end of the first power switch module 120 are electrically connected to the output port 240 of the charging device 200, the second collecting end of the detecting module 110 is electrically connected to the state output end of the first power switch module 120, the enabling end of the detecting module 110 and the enabling end of the first power switch module 120 are electrically connected to the control module 210 of the charging device 200, and the detecting output end of the detecting module 110 is electrically connected to the control module 210 of the charging device 200.
According to the utility model discloses output detection circuitry 100 has following beneficial effect at least: the detection module 110 and the first power switch module 120 can detect the output port 240 of the charging device 200, determine whether a terminal device is plugged in for charging, and determine that the terminal device needs to be charged quickly or normally according to the current condition of the output port 240, thereby providing corresponding voltage for the terminal device.
Referring to fig. 2, in some embodiments of the present invention, the detection module 110 includes a MOS transistor M2, a comparator U1, a comparator U2, and an or gate U5, a gate of the MOS transistor M2 is a second collecting end of the detection module 110, a source of the MOS transistor M2 is a power end of the detection module 110, and a drain of the MOS transistor M2 is grounded through a resistor R3; the inverting input end of the comparator U1 is connected with a first reference voltage V1, and the non-inverting input end of the comparator U1 is electrically connected with the drain electrode of the MOS transistor M2; the inverting input end of the comparator U2 is the first collecting end of the detection module 110, and the non-inverting input end of the comparator U2 is connected to the second reference voltage V2; a first input terminal of the or gate U5 is electrically connected to the output terminal of the comparator U1, a second input terminal of the or gate U5 is electrically connected to the output terminal of the comparator U2, and an output terminal of the or gate U5 is a detection output terminal of the detection module 110; the enable terminal of the comparator U1 and the power supply terminal of the comparator U2 are both enable terminals of the detection module 110. The output current signal of the first power switch module 120 can be detected by using the MOS transistor M2, and only when the first power switch module 120 is in operation, that is, when the state output terminal of the power switch module outputs a signal, the MOS transistor M2 is turned on, and in addition, the MOS transistor M1 and the MOS transistor M2 are matched, and the gate-source voltages of the two are the same, so that the turn-on degree of the MOS transistor M2 is the same as that of the MOS transistor M1, wherein the current magnitude of the MOS transistor M1 is reflected by the MOS transistor M2; when the current signal output by the first power switch module 120 is higher than the threshold, that is, the current signal generated by the MOS transistor M2 exceeds the first reference voltage V1 of the comparator U1, the comparator U1 outputs a high level; when the current signal output by the first power switch module 120 is lower than or equal to the threshold, that is, the current signal generated by the MOS transistor M2 is lower than or equal to the first reference voltage V1 of the comparator U1, the comparator U1 outputs a low level; when the output terminal of the first power switch module 120 has insufficient load capacity, that is, the second collecting terminal of the detection module 110 detects that the voltage of the output terminal of the first power switch module 120 drops to the second reference voltage V2 of the comparator U2, the comparator U2 outputs a high voltage, otherwise, when the output terminal of the first power switch module 120 does not have insufficient load capability, that is, when the second collecting terminal of the detecting module 110 detects that the voltage at the output terminal of the first power switch module 120 is greater than or equal to the second reference voltage V2 of the comparator U2, the comparator U2 outputs a low voltage, meanwhile, since the detection module 110 employs the or gate U5, when one of the comparator U1 or the comparator U2 outputs a high level, the detection output terminal of the detection module 110 outputs a high voltage to the control module 210 of the charging device 200, which indicates that the output port 240 needs to output a fast charging voltage.
It is conceivable that the normal voltage may be set according to the setting of the charging device 200, the normal voltage is generally 5V, the quick-charging voltage is generally 9V, 12V or 20V, and the corresponding voltage values may be set according to the setting of the charging device 200, and those skilled in the art may set the first reference voltage V1 and the second reference voltage V2 according to the normal voltage value of the charging device 200.
Referring to fig. 3, in some embodiments of the present invention, the first power switch module 120 includes a MOS transistor M1 and an amplifier U3: the source of the MOS transistor M1 is the power supply terminal of the first power switch module 120, and the drain of the MOS transistor M1 is the output terminal of the first power switch module 120; the inverting input terminal of the amplifier U3 is connected to the third reference voltage V3, the non-inverting input terminal of the amplifier U3 is electrically connected to the drain of the MOS transistor M1 through the resistor R1, the non-inverting input terminal of the amplifier U3 is also grounded through the resistor R2, the output terminal of the amplifier U3 is the state output terminal of the first power switch module 120, the output terminal of the amplifier U3 is also electrically connected to the gate of the MOS transistor M1, and the enable terminal of the amplifier U3 is the enable terminal of the first power switch module 120. When the control module 210 of the charging device 200 outputs a high-level control signal, the first power switch module 120 and the detection module 110 stop operating, and when the control module 210 of the charging device 200 outputs a low-level control signal, the first power switch module 120 and the detection module 110 start operating, that is, when the enable terminal of the amplifier U3 receives a low level, the amplifier U3 starts operating; meanwhile, the non-inverting input terminal of the amplifier U3 collects a voltage value between the resistor R1 and the resistor R2, when the output port 240 of the charging device 200 outputs a voltage greater than the normal voltage, the voltage at the non-inverting input terminal of the amplifier U3 increases, the output voltage of the amplifier U3 increases, the MOS transistor M1 is turned off, the first power switch module 120 stops outputting the normal voltage, when the charging device 200 does not output the voltage, the voltage at the non-inverting input terminal of the amplifier U3 is lower than or equal to the third reference voltage V3 at the inverting input terminal, the output terminal of the amplifier U3 outputs the voltage, the MOS transistor M1 is turned on, and the output terminal of the first power switch module 120 can output the voltage after the charging port of the charging device 200 is connected to the load.
Referring to fig. 4, in some embodiments of the present invention, the first power switch module 120 includes a MOS transistor M3 and a buffer driver U4, a source of the MOS transistor M3 is a power source terminal of the first power switch module 120, and a drain of the MOS transistor M3 is an output terminal of the first power switch module 120; the input terminal of the buffer driver U4 is the enable terminal of the first power switch module 120, the output terminal of the buffer driver U4 is the state output terminal of the first power switch module 120, and the output terminal of the buffer driver U4 is further electrically connected to the gate of the MOS transistor M3. When the control module 210 of the charging device 200 outputs a high-level control signal, the first power switch module 120 and the detection module 110 stop operating, and when the control module 210 of the charging device 200 outputs a low-level control signal, the first power switch module 120 and the detection module 110 start operating, that is, when the input terminal of the buffer driver U4 receives a low level, the buffer driver U4 starts operating; when the MOS transistor M1 is turned on, and the charging port of the charging device 200 is connected to the load, the output terminal of the first power switch module 120 may output a voltage, and when the input terminal of the buffer driver U4 receives a high level, the buffer driver U4 stops operating, and the MOS transistor M1 is turned off. In addition, when the buffer driver U4 is adopted, the output end of the buffer driver U4 is electrically connected to the second acquisition end of the detection module 110.
It is conceivable that the first power switch module 120 may further adopt a switching element such as a PMOS transistor, an NMOS transistor, a BJT, a current-limiting switch or a relay, etc. to implement the function of the first power switch module 120, and after the specific structure and function of the first power switch module 120 are disclosed, a person skilled in the art may combine the characteristics of the corresponding switching element and cooperate with a corresponding peripheral circuit to implement the function of the first power switch module 120.
Referring to fig. 5, in order to implement the second embodiment of the present invention, the output detection circuit 100 is applied to the charging device 200. The charging device 200 is at least provided with a power module 220, a control module 210 and a second power switch module 230, the control module 210 is electrically connected with the power module 220 and the second power switch module 230 respectively, meanwhile, an output port 240 is arranged on the charging device 200, the number of the second power switch modules 230 is matched with the number of the output ports 240, namely, each output port 240 is connected with one second power switch module 230, each second power switch module 230 is electrically connected with the power module 220 respectively, the power module 220 is a conventional technical means, and different voltages can be output according to a control signal of the control module 210.
It is contemplated that the output port 240 may be any of a conventional charging port such as a USB port or a Lightning port. Meanwhile, the second power switch module 230 is also a conventional switch structure, and is used for connecting or disconnecting the connection state between the power module 220 and the output port 240 according to the signal of the control module 210.
It is conceivable that the control module 210 may also be electrically connected to the output port 240, that is, an external terminal device may directly perform protocol communication with the control module 210 through the output port 240, and if the terminal device can perform fast charging, the terminal device sends a protocol requirement of the fast charging to the control module 210 through the output port 240.
It is conceivable that the power module 220 may be provided with a battery therein alone or directly connected to an external power source, that is, the corresponding battery or external power source is used as the second power source, so the charging device 200 may be a mobile power source, a charging adapter, a vehicle-mounted charger, etc., when the charging device 200 is a mobile power source, the power module 220 is provided with a battery alone to supply power, and if the charging device 200 is a charging adapter or a vehicle-mounted charger, the power module 220 needs to be connected to the commercial power or the vehicle-mounted battery. Meanwhile, each output detection circuit 100 can be connected with a first power supply independently or simultaneously.
It is conceivable that at least one output port 240 of the charging device 200 is provided, each output port 240 is electrically connected to one output detection circuit 100, and each output detection circuit 100 is electrically connected to the control module 210 of the charging device 200, so that the output port 240 of the charging device 200 can be monitored, and the output port 240 is controlled to output a corresponding voltage.
It is noted that the first power source connected to the power source terminal of the first power switch module 120 of each output detection circuit 100 may be plural or one. When the number of the first power supplies matches the number of the output ports 240, the first power supplies of each output detection circuit 100 are independent from each other, that is, the power supply of each first power switch 120 is connected to a single first power supply, and meanwhile, the voltage of each first power supply can be set to different voltages or voltages with the same size according to the output requirement of the corresponding output port 240, that is, when there are N output detection circuits 100, referring to fig. 5, there are N first power supplies, the voltage output by each first power supply is Vin1, Vin2 … … VinN, where N is an integer and N is greater than or equal to 1, if each first power switch module 120 is configured with a single first power supply, the reliability and stability of the charging device 200 can be improved, when one of the first power supplies is abnormal or one of the output detection circuits 100 is over-voltage or abnormal, the corresponding output port 240 cannot work normally, but other output ports 240 cannot be affected and can work normally due to the mode of independently configuring the first power supply; when only one first power source is provided, that is, the same first power source is connected to a plurality of output detection circuits 100, all the power sources of the first power switch modules 120 are from the same power source and have the same voltage, and when the same first power source is adopted, the cost can be effectively reduced. It is contemplated that combinations of two or three of the first power switch modules 120 may be used in a group that matches the same first power source. The above combination manner can be implemented by those skilled in the art by configuring and matching a corresponding number of first power supplies and the first power switch module 120 according to the requirement of the charging device.
The following describes the output detection circuit 100 according to an embodiment of the present invention in detail in a specific embodiment with reference to fig. 6 and 7. It is to be understood that the following description is illustrative only and is not intended as a specific limitation on the invention.
Referring to fig. 6 and 7, an output detection circuit 100 is applied to a charging device 200, the charging device 200 includes a power module 220, a control module 210, two second power switch modules 230, and two output ports 240, and also includes two output detection circuits 100, wherein the control module 210 is electrically connected to the power module 220 and the two second power switch modules 230, respectively, and the control module 210 is communicatively connected to each of the output ports 240, that is, the external terminal device can perform protocol communication with the control module 210 through the output port 240, so as to directly send the fast charging or ordinary charging requirement to the control module 210, the two output detection circuits 100 are respectively electrically connected to the corresponding output ports 240, each second power switch module 230 is respectively electrically connected to the corresponding output port 240, namely, one output detection circuit 100, one second power switch module 230 and one output port 240 are in a corresponding group.
Each output detection circuit 100 includes a detection module 110 and a first power switch module 120, where the detection module 110 has a power end, an enable end, a first acquisition end, a second acquisition end, and a detection output end; the first power switch module 120 has a power end, an enable end, an output end, and a status output end; the power end of the detection module 110 and the power end of the first power switch module 120 are electrically connected to the first power source, respectively; the first collecting end of the detecting module 110 and the output end of the first power switch module 120 are electrically connected to the output port 240 corresponding to the charging device 200, the second collecting end of the detecting module 110 is electrically connected to the state output end of the first power switch module 120, the enabling end of the detecting module 110 and the enabling end of the first power switch module 120 are electrically connected to the control module 210 of the charging device 200, and the detecting output end of the detecting module 110 is electrically connected to the control module 210 of the charging device 200.
For convenience of description, one of the output detection circuits 100 and the corresponding output port 240 and the second power switch module 230 are set as a first group, and the other of the output detection circuits 100 and the corresponding output port 240 and the second power switch module 230 are set as a second group, in this embodiment, the structures of the first group and the second group are the same, and the following description will take the output detection circuit 100 of the first group, the corresponding output port 240 and the corresponding second power switch module 230 as an example, where the detection module 110 of the first group includes a MOS transistor M2, a comparator U1, a comparator U2 and an or gate U5, a gate of the MOS transistor M2 is a second collecting terminal of the detection module 110, a source of the MOS transistor M2 is a power supply terminal of the detection module 110, and a drain of the MOS transistor M2 is grounded through a resistor R3; the inverting input end of the comparator U1 is connected with a first reference voltage V1, and the non-inverting input end of the comparator U1 is electrically connected with the drain electrode of the MOS transistor M2; an inverting input terminal of the comparator U2 is a first collecting terminal of the detection module 110, that is, the inverting input terminal of the comparator U2 is electrically connected to the corresponding output port 240, and a non-inverting input terminal of the comparator U2 is connected to the second reference voltage V2; a first input terminal of the or gate U5 is electrically connected to the output terminal of the comparator U1, a second input terminal of the or gate U5 is electrically connected to the output terminal of the comparator U2, an output terminal of the or gate U5 is a detection output terminal of the detection module 110, and an output terminal of the or gate U5 is electrically connected to the control module 210; the enable terminal of the comparator U1 and the power supply terminal of the comparator U2 are both enable terminals of the detection module 110.
In this embodiment, the normal voltage may be set according to the setting of the charging device 200, and the normal voltage is generally 5V, so the normal charging voltage of the charging device 200 of this embodiment is 5V, the voltage for fast charging of the charging device 200 is generally one of 9V, 12V, or 20V, a corresponding voltage value may be set according to the setting of the charging device 200, and a person skilled in the art may set the first reference voltage V1 and the second reference voltage V2 according to the normal voltage value of the charging device 200.
In this embodiment, the first power switch module 120 of the first group includes a MOS transistor M1 and an amplifier U3: the source of the MOS transistor M1 is the power source terminal of the first power switch module 120, and the drain of the MOS transistor M1 is the output terminal of the first power switch module 120, that is, the drain of the MOS transistor M1 is electrically connected to the corresponding output port 240; the inverting input terminal of the amplifier U3 is connected to the third reference voltage V3, the non-inverting input terminal of the amplifier U3 is electrically connected to the drain of the MOS transistor M1 through the resistor R1, the non-inverting input terminal of the amplifier U3 is also grounded through the resistor R2, the output terminal of the amplifier U3 is the state output terminal of the first power switch module 120, that is, the output terminal of the first amplifier U3 is also electrically connected to the gate of the MOS transistor M2, the output terminal of the amplifier U3 is also electrically connected to the gate of the MOS transistor M1, and the enable terminal of the amplifier U3 is the enable terminal of the first power switch module 120.
Meanwhile, the signals of the enable terminals of the amplifier U3, the comparator U1, the comparator U2 and the second power switch module 230 in each group are the same signal, that is, the control module 210 controls the operating states of the amplifier U3, the comparator U1, the comparator U2 and the second power switch module 230 in the same group through one port, receives the detection signal sent by the or gate U5 in different groups, and controls the operating states of the corresponding amplifier U3, the comparator U1, the comparator U2 and the second power switch module 230 according to the detection signal.
Description of the working principle:
in an initial state, each interface is not connected to a terminal device, so that the control module 210 of the charging device 200 outputs a low-level control signal, the corresponding first power switch module 120 and the detection module 110 start to operate, and the corresponding second power switch module 230 is disconnected, so that the power module 220 is disconnected from the corresponding output port 240; namely, when the enable end of the amplifier U3 receives a low level, the amplifier U3, the comparator U1 and the comparator U2 all start to work; meanwhile, the non-inverting input end of the amplifier U3 collects the voltage value between the resistor R1 and the resistor R2; when the charging device 200 does not output voltage, the voltage at the non-inverting input terminal of the amplifier U3 is lower than the third reference voltage V3 at the inverting input terminal, the output terminal of the amplifier U3 outputs voltage within the normal range, and the MOS transistor M1 and the MOS transistor M2 are both turned on;
at this time, if the terminal device accessed to the output port 240 is a low-current device, such as a wireless charging base, a bluetooth headset, a bracelet, etc., which is inserted for charging, the first power switch module 120 may provide voltage to the output port 240, and since the low-current terminal device requires a charging voltage lower than a normal voltage, the first power supply may directly charge the low-current terminal device, and meanwhile, the detection module 110 detects that the current terminal device belongs to a normal working range, and may not send a high-level detection signal to the control module 210; the output port 240 continuously utilizes the first power supply to charge the terminal device; at this time, if the terminal device sends a fast charging request to the control module 210 through the output port 240, the control module 210 sends a high-level control signal to turn off the corresponding first power switch module 120 and the corresponding detection module 110, and turn on the corresponding second power switch module 230, so that the power switch module 220 charges the terminal device.
Because the output detection circuit 100, the second power switch module 230, and the output port 240 of each group are independent units, when the first group provides a common voltage through the output detection circuit 100, and the second group is connected to a fast terminal device, the second group can output a high voltage to the corresponding output port 240 through the second power switch module 230 and the power module 220, so as to meet the requirement of fast charging.
According to the utility model discloses charging device 200, through so setting up, some effects as follows at least can be reached, utilize detection module 110 and first switch module 120 can realize detecting charging device 200's delivery outlet 240, can judge whether there is insertion terminal equipment, and can judge that this terminal equipment needs quick charge or ordinary charging according to the electric current condition of delivery outlet 240, thereby provide corresponding voltage for terminal equipment, cooperate output detection circuitry 100 simultaneously, charging device 200 can export quick charge voltage or ordinary voltage respectively simultaneously on two delivery outlets 240, charging device 200 can provide quick charge or ordinary voltage of charging respectively for two terminal equipment simultaneously.
According to the utility model discloses charging device 200 has following beneficial effect at least: the detection of the output port 240 of the charging device 200 can be realized by using the detection module 110 and the first power switch module 120, whether a terminal device is inserted or not can be judged, and whether the terminal device is a fast terminal device or a common terminal device can be judged according to the current condition of the output port 240, so that corresponding voltage is provided for the terminal device, and meanwhile, the detection circuit 100 is matched to output, and the fast charging voltage and the common voltage can be output on at least two output ports 240 respectively, namely, the charging device 200 can simultaneously meet the requirements of fast charging or common charging for at least two terminal devices respectively.
Other configurations and operations of the charging device 200 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (4)
1. An output detection circuit, comprising:
the detection module is provided with a power supply end, an enabling end, a first acquisition end, a second acquisition end and a detection output end;
the first power switch module is provided with a power end, an enabling end, an output end and a state output end;
the power end of the detection module and the power end of the first power switch module are respectively electrically connected with a first power supply; the detection module is characterized in that the first acquisition end and the first power switch module are electrically connected with the output end of the charging device respectively, the second acquisition end and the first power switch module are electrically connected with the state output end of the detection module, the enabling end of the detection module and the enabling end of the first power switch module are electrically connected with the control module of the charging device respectively, and the detection output end of the detection module is electrically connected with the control module of the charging device.
2. The output detection circuit of claim 1, wherein: the detection module comprises:
a MOS transistor M2, a gate of the MOS transistor M2 being the second collecting end of the detection module, a source of the MOS transistor M2 being the power supply end of the detection module, and a drain of the MOS transistor M2 being grounded through a resistor R3;
a comparator U1, an inverting input terminal of the comparator U1 is connected to a first reference voltage, and a non-inverting input terminal of the comparator U1 is electrically connected to the drain of the MOS transistor M2;
a comparator U2, an inverting input terminal of the comparator U2 is the first acquisition terminal of the detection module, and a non-inverting input terminal of the comparator U2 is connected to a second reference voltage;
an or gate U5, wherein a first input terminal of the or gate U5 is electrically connected to an output terminal of the comparator U1, a second input terminal of the or gate U5 is electrically connected to an output terminal of the comparator U2, and an output terminal of the or gate U5 is a detection output terminal of the detection module;
wherein the enable terminal of the comparator U1 and the power supply terminal of the comparator U2 are both the enable terminals of the detection module.
3. The output detection circuit of claim 1, wherein: the first power switch module includes:
a MOS transistor M1, wherein the source of the MOS transistor M1 is the power supply terminal of the first power switch module, and the drain of the MOS transistor M1 is the output terminal of the first power switch module;
an amplifier U3, a third reference voltage is connected to the inverting input terminal of the amplifier U3, the non-inverting input terminal of the amplifier U3 passes through a resistor R1 and the drain of the MOS transistor M1 is electrically connected, the non-inverting input terminal of the amplifier U3 is grounded through a resistor R2, the output terminal of the amplifier U3 is the state output terminal of the first power switch module, the output terminal of the amplifier U3 is also electrically connected to the gate of the MOS transistor M1, and the enable terminal of the amplifier U3 is the enable terminal of the first power switch module.
4. The output detection circuit of claim 1, wherein: the first power switch module includes:
a MOS transistor M3, wherein the source of the MOS transistor M3 is the power supply terminal of the first power switch module, and the drain of the MOS transistor M3 is the output terminal of the first power switch module;
buffer driver U4, buffer driver U4's input is first power switch module the enable end, buffer driver U4's output is first power switch module the state output, buffer driver U4 the output still with MOS pipe M3's grid electric connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021216611.7U CN212781181U (en) | 2020-06-24 | 2020-06-24 | Output detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021216611.7U CN212781181U (en) | 2020-06-24 | 2020-06-24 | Output detection circuit |
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| CN212781181U true CN212781181U (en) | 2021-03-23 |
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| CN202021216611.7U Active CN212781181U (en) | 2020-06-24 | 2020-06-24 | Output detection circuit |
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