CN114726059A - Charging identification circuit and device - Google Patents

Charging identification circuit and device Download PDF

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Publication number
CN114726059A
CN114726059A CN202210547281.7A CN202210547281A CN114726059A CN 114726059 A CN114726059 A CN 114726059A CN 202210547281 A CN202210547281 A CN 202210547281A CN 114726059 A CN114726059 A CN 114726059A
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CN
China
Prior art keywords
circuit
input end
resistor
power supply
enabling
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210547281.7A
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Chinese (zh)
Inventor
杨志豪
杨坤
陈晴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Takstar Electronic Co ltd
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Guangdong Takstar Electronic Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Guangdong Takstar Electronic Co ltd filed Critical Guangdong Takstar Electronic Co ltd
Priority to CN202210547281.7A priority Critical patent/CN114726059A/en
Publication of CN114726059A publication Critical patent/CN114726059A/en
Pending legal-status Critical Current

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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
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • 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
    • 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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • 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
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention provides a charging identification circuit and a device, wherein the charging identification circuit comprises a first interface circuit, a second interface circuit, a power supply circuit and a control circuit, the charging circuit is provided with a power supply input end, a power supply output end and an enabling input end, and the power supply output end and a post-stage circuit output power supply; the charging circuit is provided with a first input end, a second input end, a first output end and an enabling output end; the first input end is connected with the first interface circuit, the second input end is connected with the second interface circuit, the first output end is connected with the power input end, and the enabling output end is connected with the enabling input end. The beneficial effects are that: the application provides a charging identification circuit and a charging identification device, which can be applied to some portable microphone products or some consumer electronics patch cord products around mobile phones. The convenience of customers is used while filling, multiple use scenes are provided, filling and placing are achieved while simultaneously, the efficiency is high, the control is convenient, and the cost is lower.

Description

Charging identification circuit and device
Technical Field
The invention relates to the technical field of automatic switch electronic circuits, in particular to a charging identification circuit and a charging identification device.
Background
In the prior art, at present, electronic products using a rechargeable battery built in a USB charging interface are increasingly popular with consumers due to their comprehensive functions and portability. In the manufacturing process of products, it is often necessary to use a USB charging device to charge an electronic device having a built-in rechargeable battery. At present, a USB data and charging identification circuit in the market is few, and is a group of data and a group of voltage, so that the application scenes are few, and the use is inconvenient.
Disclosure of Invention
The invention provides a charging identification circuit and a charging identification device for overcoming the problems that the USB charging in the background technology has fewer application scenes and is inconvenient to use and cannot well realize green environmental protection.
A charging identification circuit comprises a first interface circuit, a second interface circuit, a power supply circuit and a control circuit,
the charging circuit is provided with a power supply input end, a power supply output end and an enabling input end, and the power supply output end and the rear-stage circuit output power supply;
the charging circuit is provided with a first input end, a second input end, a first output end and an enabling output end; the first input end is connected with the first interface circuit, the second input end is connected with the second interface circuit, the first output end is connected with the power input end, and the enabling output end is connected with the enabling input end.
Optionally, the control circuit comprises a main control chip, a switch enabling circuit,
the enable output end is arranged on the main control chip, the main control chip is also provided with a first detection end, a second detection end and a switch end, the first detection end is connected with the first interface circuit, and the second detection circuit is connected with the second interface circuit;
the switch end is connected with the switch enabling circuit and controls the first output end to be conducted with the first input end or the second input end.
Optionally, the switch enable circuit comprises a switching circuit, an enable circuit,
the first input end, the second input end and the first output end are arranged on the enabling circuit; the switch circuit is connected with the switch end and the enabling circuit to control the enabling circuit to be conducted.
Optionally, the switch circuit includes a first MOS transistor, a gate of the first MOS transistor is connected to the switch end, a drain is connected to the enable circuit and the power input end through a first resistor, and a source is grounded.
Optionally, the enable circuit includes a second MOS transistor, a third MOS transistor, a fourth MOS transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, and a diode, a gate of the second MOS transistor is connected to the switch circuit, a drain is connected to the first interface circuit, and a source is connected to the power input terminal, where the drain of the second MOS transistor is the first input terminal;
the drain of the third MOS tube is a second input end, the second input end is connected with the first resistor, the second resistor, the diode and the second interface circuit, the grid of the third MOS tube is connected with the switch circuit, and the source is connected with the power input end;
the other end of the first resistor is connected with a grid electrode of the fourth MOS tube, a drain electrode of the fourth MOS tube is connected with the first input end, and a source electrode of the fourth MOS tube is connected with the power supply input end and the other end of the diode;
the other end of the third resistor is connected with the second detection end and the fourth resistor, and the other end of the fourth resistor is grounded.
Optionally, the power supply circuit includes a voltage regulation chip, a fifth MOS transistor,
the input end of the voltage stabilizing chip is a power supply input end, and the output end of the voltage stabilizing chip is connected with the source electrode of the fifth MOS tube; the grid of the fifth MOS tube is an enabling input end, the drain is a power output end and outputs power to a rear-stage circuit, and the input end and the output end of the voltage stabilizing chip are both connected with a filter capacitor.
Optionally, the first interface circuit includes a first USB interface, the first USB interface is provided with a first power end and a detection output end, one end of the first power end is connected to an external power source, and the other end of the first power end is connected to the first input end; the detection output end is connected with a fifth resistor and a first capacitor, the fifth resistor is connected with the first detection end, and the other end of the first capacitor is grounded.
Optionally, the second interface circuit includes a second USB interface, the second USB interface is provided with a second power end, one end of the second power end is connected to an external power supply, and the other end of the second power end is connected to the second input end through a sixth resistor.
In addition, this application still provides a device, the device is provided with integrated circuit board, integrated circuit board printing has foretell identification circuit that charges.
The beneficial effects are that: the application provides a charging identification circuit and a charging identification device, which can be applied to some portable microphone products or some consumer electronics patch cord products around mobile phones. The convenience of customers is used while filling, multiple use scenes are provided, filling and placing are achieved while simultaneously, the efficiency is high, the control is convenient, and the cost is lower.
Drawings
Fig. 1 is a circuit diagram of a main control chip of the circuit according to an embodiment of the present invention.
Fig. 2 is a circuit diagram of a switch enable circuit of the present circuit according to an embodiment of the present invention.
Fig. 3 is a circuit diagram of a power supply circuit of the present circuit according to an embodiment of the present invention.
Fig. 4 is a circuit diagram of the first interface circuit and the second interface circuit of the present circuit according to the embodiment of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the drawings, it is only for convenience of description and simplicity of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:
in the case of the example 1, the following examples are given,
in the embodiment shown in fig. 1-4, the present application discloses a charging identification circuit, which includes a first interface circuit, a second interface circuit, a power supply circuit, and a control circuit, wherein the charging circuit includes a power input terminal VBUSIN, a power output terminal RT _5V, an enable input terminal RT _ POW, a power output terminal RT _5V, and a post-stage circuit output power supply; the charging circuit is provided with a first input end VBUS2, a second input end VBUS1-, a first output end and an enabling output end; the first input end is connected with the first interface circuit, the second input end is connected with the second interface circuit, the first output end is connected with the power input end VBUSIN, and the enabling output end is connected with the enabling input end RT _ POW. In this embodiment, the control circuit controls the power supplies of the first interface circuit and the second interface circuit to supply power to the power supply circuit. In an implementation of this embodiment, the first interface circuit and the second interface circuit may be USB connectors, the first interface circuit is connected to a mobile terminal such as a mobile phone, the second interface circuit is connected to a power supply such as a power adapter, and the control circuit is connected to the first interface circuit and the second interface circuit to identify the power supplies of the first interface circuit and the second interface circuit, so that the controlled one interface circuit or the second interface circuit supplies power to the power supply circuit. The application provides a charging identification circuit and a charging identification device, which can be applied to some portable microphone products or some consumer electronics patch cord products around mobile phones. The convenience of customers is used while filling, multiple use scenes are provided, filling and placing are achieved while simultaneously, the efficiency is high, the control is convenient, and the cost is lower.
In the case of the example 2, the following examples are given,
in some embodiments, the control circuit includes a main control chip U1 and a switch enable circuit, the enable output terminal is disposed on the main control chip U1, the main control chip U1 is further provided with a first detection terminal C0CC1, a second detection terminal VBUS _ DET, and a switch terminal VBUS _ EN, the first detection terminal is connected with the first interface circuit, and the second detection circuit is connected with the second interface circuit; the switch end is connected with the switch enabling circuit to control the first output end to be conducted with the first input end or the second input end. In this embodiment, the control circuit of the present application may include two parts, i.e., an integrated chip such as a main control chip and a logic circuit such as a switch enable circuit; the main control chip is used for receiving signals of the first interface circuit or the second interface circuit, controlling the power supply circuit to be conducted, and controlling the first conductive circuit or the second conductive circuit to supply power to the power supply circuit. The master control chip can be a control chip with the model of LDR6023SS, and can be used for identifying the voltages of the first interface circuit and the second interface circuit and controlling the power supply circuit and the switch enabling circuit to be switched on.
Example 3
In some embodiments, the switch enabling circuit comprises a switch circuit and an enabling circuit, wherein the first input end, the second input end and the first output end are arranged on the enabling circuit; the switch circuit is connected with the switch end and the enabling circuit to control the enabling circuit to be conducted. The switch circuit comprises a first MOS transistor Q1, the grid electrode of the first MOS transistor Q1 is connected with the switch end, the drain electrode enabling circuit is connected, and the source electrode is grounded. The enabling circuit comprises a second MOS tube Q2, a third MOS tube Q3, a fourth MOS tube Q4, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a diode S1, wherein the grid electrode of the second MOS tube is connected with the switch circuit, the drain electrode of the second MOS tube is connected with the first interface circuit, the source electrode of the second MOS tube is connected with the power input end VBUSIN, and the drain electrode of the second MOS tube is the first input end; the drain of the third MOS tube is a second input end, the second input end is connected with the first resistor, the second resistor, the diode and the second interface circuit, the grid of the third MOS tube is connected with the switch circuit, and the source is connected with the power input end VBUSIN; the other end of the first resistor is connected with a grid electrode of a fourth MOS tube, a drain electrode of the fourth MOS tube is connected with the first input end, and a source electrode of the fourth MOS tube is connected with a power input end VBUSIN and the other end of the diode; the other end of the third resistor is connected with the second detection end and the fourth resistor, and the other end of the fourth resistor is grounded. In this embodiment, this application receive main control chip's signal through first MOS pipe, through drawing down the signal of second MOS pipe, third MOS pipe, make second MOS pipe, third MOS pipe switch on or turn-off. The grid electrode of the first MOS tube is grounded through a current-limiting resistor and is used for comprising the first MOS tube. In addition, the first MOS pipe of this application can be replaced with other switching element spares such as triode. The second MOS tube receives signals of the switch circuit, so that the first input end and the power supply circuit are controlled to be conducted or closed, and the first power supply circuit is controlled to supply power to the rear-stage circuit. In addition, in this embodiment, the first interface circuit includes a first USB interface, the first USB interface is provided with a first power end and a detection output end, one end of the first power end is connected to an external power source, and the other end of the first power end is connected to the first input end; the detection output end is connected with the fifth resistor and the first capacitor, the fifth resistor is connected with the first detection end, and the other end of the first capacitor is grounded. The first detection end of the main control chip controls the on-off of the power supply circuit by detecting the voltage of the first interface circuit. The second enabling circuit comprises a third MOS tube, a fourth MOS tube, a second resistor, a third resistor, a fourth resistor and a diode, wherein the drain of the third MOS tube is a second input end, the second input end is connected with the first resistor, the second resistor, the diode and a second interface circuit, the grid of the third MOS tube is connected with the switch circuit, and the source is connected with the power input end VBUSIN; in this embodiment, the third MOS transistor of the present application is used to connect the second input terminal and the power input terminal VBUSIN, and is turned on or off by receiving a signal of the first MOS transistor. The other end of the third resistor is connected with the second detection end and the fourth resistor, and the other end of the fourth resistor is grounded. The second detection end detects the power transmitted from the first input end through the third resistor and outputs the power to the main control chip for identification, so that the on-off of the switch circuit is controlled, and the on-off of the third MOS tube is further controlled. The other end of the first resistor is connected with a grid electrode of a fourth MOS tube, a drain electrode of the fourth MOS tube is connected with the first input end, and a source electrode of the fourth MOS tube is connected with a power input end VBUSIN and the other end of the diode; and the fourth MOS tube, the second resistor and the diode form a circuit for preventing voltage from being connected to the first input end in series.
In the case of the example 4, it is preferred,
in some embodiments, the power supply circuit includes a voltage regulation chip U2 and a fifth MOS transistor Q5, an input end of the voltage regulation chip is a power input end VBUSIN, and an output end of the voltage regulation chip is connected with a source of the fifth MOS transistor; the grid electrode of the fifth MOS tube is an enabling input end RT _ POW, the drain electrode is a power output end RT _5V and outputs power to a rear-stage circuit, and the input end and the output end of the voltage stabilizing chip are both connected with filter capacitors. In this embodiment, the voltage stabilizing chip of the present application may be a chip with a model number of HT7550, and a power supply input by the first interface circuit or the second interface circuit is output to the subsequent stage circuit through the voltage stabilizing chip and the fifth MOS transistor. And the grid electrode of the fifth MOS tube is connected with the main control chip, and the on-off of the circuit is controlled by receiving a signal of the main control chip.
Example 5
In some embodiments, the first interface circuit comprises a first USB interface J1, the first USB interface is provided with a first power terminal and a detection output terminal, the first power terminal is connected with an external power source at one end, and the other end of the first power terminal is connected with a first input terminal; the detection output end is connected with the fifth resistor and the first capacitor, the fifth resistor is connected with the first detection end, and the other end of the first capacitor is grounded. The second interface circuit comprises a second USB interface J2, the second USB interface is provided with a second power supply end, one end of the second power supply end is connected with an external power supply, and the other end of the second power supply end is connected with a second input end through a sixth resistor. In addition, the second interface circuit is also provided with detection ends C1CC1 and C1CC2, and the detection ends C1CC1 and C1CC2 are positive and negative insertion detection pins. In this embodiment, the first interface circuit and the second interface circuit may be USB connectors, the first interface circuit is connected to a mobile terminal such as a mobile phone, the second interface circuit is connected to a power supply such as a power adapter, and the control circuit is connected to the first interface circuit and the second interface circuit to identify the power supplies of the first interface circuit and the second interface circuit, so that the controlled first interface circuit or the second interface circuit supplies power to the power supply circuit.
In the case of the example 6, it is shown,
in some embodiments, the present application further provides a device provided with an integrated circuit board printed with the charging identification circuit described above.
In this embodiment, the dual-interface charging identification is realized through the charging identification circuit. Wherein, the power output terminal RT _5V is a power supply for providing a post-stage circuit; the first input end is connected with a USB (universal serial bus) of the mobile phone end through a first interface circuit; the second input terminal is connected through a second interface circuit adapter USB.
First case (power take): when the mobile phone is connected, the first input end is normally powered on, the fourth MOS tube is conducted, and the parasitic characteristics of the MOS tube are achieved; the second MOS tube is not conducted, so that more power consumption or output is prevented; 5V, taking power from the mobile phone, and enabling a rear-stage circuit to work normally at the moment;
second case (charging): when the adapter is connected, the second input end is normally powered on, the second MOS tube is conducted, the second input end obtains electricity from the adapter, the main control chip starts to normally work at the moment, meanwhile, the third resistor and the fourth resistor are second detection ends connected to the main control chip in a voltage division mode, the main control chip detects voltage, and therefore high voltage is applied to the switch end, the fifth MOS tube is conducted, the fourth MOS tube is conducted, and the adapter can be charged to a mobile phone at the moment. Thereby realizing the process of charging and electricity taking.
In the charging process, the current may reach more than 2A due to quick charging, so that the MOS tube is scalded. A third MOS tube and a diode are added, the third MOS tube is conducted with a fourth MOS tube when power is taken, and the diode and the third MOS tube prevent current from flowing backwards; when the second input end is charged, the diode is conducted with the second MOS tube, the chip works normally, the second detection end detects voltage, the main control chip controls the switch end to be raised, the fifth MOS tube is conducted, the fourth MOS tube and the third MOS tube are conducted simultaneously, and the process that the adapter charges the mobile phone is carried out.
In the circuit, the first resistor and the third resistor have the function of current limiting, and the breakdown of the grids of the second MOS transistor, the third MOS transistor and the fourth MOS transistor is prevented, so that the grid voltage is increased during electrification, and backflow is prevented.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A charging identification circuit is characterized in that a first interface circuit, a second interface circuit, a power supply circuit and a control circuit,
the charging circuit is provided with a power supply input end, a power supply output end and an enabling input end, and the power supply output end and the rear-stage circuit output power supply;
the charging circuit is provided with a first input end, a second input end, a first output end and an enabling output end; the first input end is connected with the first interface circuit, the second input end is connected with the second interface circuit, the first output end is connected with the power input end, and the enabling output end is connected with the enabling input end.
2. The charging identification circuit of claim 1, wherein the control circuit comprises a main control chip, a switch enable circuit,
the enable output end is arranged on the main control chip, the main control chip is also provided with a first detection end, a second detection end and a switch end, the first detection end is connected with the first interface circuit, and the second detection circuit is connected with the second interface circuit;
the switch end is connected with the switch enabling circuit and controls the first output end to be conducted with the first input end or the second input end.
3. The charging identification circuit of claim 2, wherein the switch enable circuit comprises a switch circuit, an enable circuit,
the first input end, the second input end and the first output end are arranged on the enabling circuit; the switch circuit is connected with the switch end and the enabling circuit to control the enabling circuit to be conducted.
4. A charging identification circuit as claimed in claim 3, characterized in that the switching circuit comprises a first MOS transistor, the gate of the first MOS transistor is connected to the switching terminal, the drain of the first MOS transistor is connected to the enabling circuit and the power input terminal via a first resistor, and the source of the first MOS transistor is grounded.
5. The charging identification circuit of claim 4, wherein the enabling circuit comprises a second MOS transistor, a third MOS transistor, a fourth MOS transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, and a diode, a gate of the second MOS transistor is connected to the switching circuit, a drain of the second MOS transistor is connected to the first interface circuit, a source of the second MOS transistor is connected to the power input, and a drain of the second MOS transistor is the first input;
the drain of the third MOS tube is a second input end, the second input end is connected with the first resistor, the second resistor, the diode and the second interface circuit, the grid of the third MOS tube is connected with the switch circuit, and the source is connected with the power supply input end;
the other end of the first resistor is connected with a grid electrode of the fourth MOS tube, a drain electrode of the fourth MOS tube is connected with the first input end, and a source electrode of the fourth MOS tube is connected with the power supply input end and the other end of the diode;
the other end of the third resistor is connected with the second detection end and the fourth resistor, and the other end of the fourth resistor is grounded.
6. The charging identification circuit of claim 2, wherein the power supply circuit comprises a voltage regulator chip, a fifth MOS transistor,
the input end of the voltage stabilizing chip is a power supply input end, and the output end of the voltage stabilizing chip is connected with the source level of the fifth MOS tube; the grid of the fifth MOS tube is an enabling input end, the drain is a power output end and outputs power to a rear-stage circuit, and the input end and the output end of the voltage stabilizing chip are both connected with a filter capacitor.
7. A charging identification circuit as claimed in claim 2, characterized in that said first interface circuit comprises a first USB interface, said first USB interface is provided with a first power end and a detection output end, and said first power end is connected to an external power source.
8. The charging identification circuit of claim 7, wherein the first USB interface further comprises a detection output terminal, the detection output terminal is connected to a fifth resistor and a first capacitor, the fifth resistor is connected to the first detection terminal, and the other end of the first capacitor is grounded.
9. A charging identification circuit as claimed in claim 1, characterized in that said second interface circuit comprises a second USB interface, said second USB interface is provided with a second power supply end, one end of said second power supply end is connected with an external power supply, and the other end of said second power supply end is connected with said second input end through a sixth resistor.
10. A device, characterized in that it is provided with an integrated circuit board printed with a charging identification circuit according to any of claims 1-9.
CN202210547281.7A 2022-05-19 2022-05-19 Charging identification circuit and device Pending CN114726059A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210547281.7A CN114726059A (en) 2022-05-19 2022-05-19 Charging identification circuit and device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210547281.7A CN114726059A (en) 2022-05-19 2022-05-19 Charging identification circuit and device

Publications (1)

Publication Number Publication Date
CN114726059A true CN114726059A (en) 2022-07-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210547281.7A Pending CN114726059A (en) 2022-05-19 2022-05-19 Charging identification circuit and device

Country Status (1)

Country Link
CN (1) CN114726059A (en)

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