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CN-224217096-U - OTG self-adaptation circuit, device and mobile device

CN224217096UCN 224217096 UCN224217096 UCN 224217096UCN-224217096-U

Abstract

The utility model discloses an OTG self-adaptive circuit, a device and mobile equipment, which relate to the technical field of electronics, wherein the OTG self-adaptive circuit comprises a switch module, a public end is connected with external equipment, a first switching end is connected with a power supply signal, a second switching end is connected with a control power supply signal, a channel selection pin is controlled by a USB identity signal, the USB identity signal is initially set to be high level, the control public end is connected with the second switching end, when an external interface has voltage, the OTG self-adaptive circuit is powered, when the external interface has no voltage, the USB identity signal is pulled down to be low level, the control public end is connected with the first switching end, the power supply signal supplies power for the external equipment connected with the public end, the USB self-adaptive circuit can automatically identify whether the equipment is a host or a slave, and can self-adaptively switch the power supply relation of the host-slave equipment without an OTG line, so that the OTG self-adaptive circuit can be suitable for more scenes.

Inventors

  • LIN ZHENMAO

Assignees

  • 深圳市广和通无线股份有限公司

Dates

Publication Date
20260508
Application Date
20250513

Claims (10)

  1. 1. An OTG adaptive circuit is characterized by comprising a switch module; The public end of the switch module is connected with external equipment, the first switching end of the switch module is connected with a power supply signal, the second switching end of the switch module is connected with a control power supply signal, a channel selection pin of the switch module is controlled by a USB identity signal, the USB identity signal is initially set to be high level, and the public end is controlled to be connected with the second switching end; when the public terminal has voltage, the OTG self-adaptive circuit is powered; When the public terminal does not have voltage, the USB identity signal is pulled down to a low level, the public terminal is controlled to be connected with the first switching terminal, and the power supply signal supplies power for external equipment connected with the public terminal.
  2. 2. The OTG adaptation circuit of claim 1, wherein the OTG adaptation circuit further comprises a control module; One end of the control module is connected with the USB identity signal, the other end of the control module is connected with the control power signal, and the control module is used for controlling the level state of the USB identity signal according to the level state of the control power signal.
  3. 3. The OTG adaptive circuit of claim 2, wherein when an external interface has a voltage, the control power signal is pulled up to a high level, the control power signal pulls up the USB identity signal to a high level, the external interface being an interface on the external device connected to the common terminal; When the external interface has no voltage, the control power signal is pulled down to be at a low level, and the USB identity signal is pulled down to be at a low level.
  4. 4. The OTG adaptation circuit of claim 3, wherein the OTG adaptation circuit further comprises a power module; one end of the power supply module is connected with the USB identity signal, the other end of the power supply module is connected with the power supply signal, and the power supply module is used for controlling the voltage output of the power supply signal according to the level state of the USB identity signal.
  5. 5. The OTG adaptation circuit of claim 4, wherein the power module supplies power to an external device connected to the power supply common via the power supply signal output voltage when the USB identity signal is at a low level.
  6. 6. The OTG adaptive circuit of claim 5 wherein the power module comprises a triode unit and a DCDC converter; And an enabling end of the DCDC converter is connected with the USB identity signal through the triode unit and is used for controlling the voltage output of the power supply signal according to the level state of the USB identity signal.
  7. 7. The OTG adaptive circuit of claim 6 wherein the DCDC converter is turned off when the voltage of the external interface flows into the control power signal through the switching module to maintain the USB status signal at a high level.
  8. 8. The OTG adaptive circuit of claim 7 wherein the DCDC converter is turned on when the control power signal is low and the USB status signal is low when the external interface has no input voltage.
  9. 9. An OTG adaptation device, characterized in that it comprises an OTG adaptation circuit according to any of claims 1 to 8.
  10. 10. A mobile device, characterized in that it comprises an OTG adaptation means according to claim 9.

Description

OTG self-adaptation circuit, device and mobile device Technical Field The present utility model relates to the field of electronic technologies, and in particular, to an OTG adaptive circuit, an OTG adaptive device, and a mobile device. Background When The mobile device and The peripheral device interact more and more frequently, OTG (On-The-Go) technology is generated, so that The mobile device can be directly connected with other USB devices, functions of data transmission, device control and The like are realized, and The universality and convenience of The device are greatly improved. In the conventional OTG circuit, in terms of interface design, the interfaces of part of the devices only have 4 PINs and do not contain usb_id PINs, which play a key role in OTG functions and are used for identifying whether the devices are used as a master or a slave, when the interfaces lack such PINs, the OTG circuit cannot accurately judge the roles of the devices, furthermore, normal OTG functions cannot be realized, on the other hand, a common OTG circuit excessively depends on external intervention in function realization, and even if the equipment interface has a hardware foundation for realizing the OTG functions, connection and communication between equipment can still be completed by means of OTG wires in actual use. This not only increases the use cost of the user, but also reduces the convenience of use. Therefore, how to improve the adaptability of OTG circuits to different scenarios has become a problem to be solved in the art. Disclosure of utility model The utility model mainly aims to provide an OTG self-adaptive circuit and battery interface equipment, and aims to solve the technical problem of how to improve the adaptability of the OTG circuit to different scenes. In order to achieve the above purpose, the OTG self-adaptive circuit provided by the utility model comprises a switch module; The public end of the switch module is connected with external equipment, the first switching end of the switch module is connected with a power supply signal, the second switching end of the switch module is connected with a control power supply signal, a channel selection pin of the switch module is controlled by a USB identity signal, the USB identity signal is initially set to be high level, and the public end is controlled to be connected with the second switching end; when the public terminal has voltage, the OTG self-adaptive circuit is powered; When the public terminal does not have voltage, the USB identity signal is pulled down to a low level, the public terminal is controlled to be connected with the first switching terminal, and the power supply signal supplies power for external equipment connected with the public terminal. In one embodiment, the OTG adaptive circuit further comprises a control module; One end of the control module is connected with the USB identity signal, the other end of the control module is connected with the control power signal, and the control module is used for controlling the level state of the USB identity signal according to the level state of the control power signal. In an embodiment, when the external interface has a voltage, the control power signal is pulled up to a high level, and the control power signal pulls up the USB identity signal to a high level; When the external interface has no voltage, the control power signal is pulled down to be at a low level, and the USB identity signal is pulled down to be at a low level. In one embodiment, the OTG adaptive circuit further comprises a power supply module; one end of the power supply module is connected with the USB identity signal, the other end of the power supply module is connected with the power supply signal, and the power supply module is used for controlling the voltage output of the power supply signal according to the level state of the USB identity signal. In an embodiment, when the USB identity signal is at a low level, the power module supplies power to an external device connected to the power supply common terminal through the power supply signal output voltage. In one embodiment, the power module includes a triode unit and a DCDC converter; And an enabling end of the DCDC converter is connected with the USB identity signal through the triode unit and is used for controlling the voltage output of the power supply signal according to the level state of the USB identity signal. In an embodiment, the DCDC converter is turned off when the voltage of the external interface flows into the control power signal through the switching module, and the USB identity signal is maintained at a high level. In an embodiment, when the external interface has no input voltage, the control power signal is at a low level, and the USB status signal is pulled down to be at a low level, the DCDC converter is turned on. The utility model also proposes an OTG adaptation device comprising an OTG adaptation circuit as described above. T