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Detection circuit and power adapter of usb Type-C device type

A power adapter and detection circuit technology, applied in the direction of electrical connection testing, etc., can solve the problem of not being able to know whether the USB Type-C device is a custom device, and achieve the effect of avoiding burning

Active Publication Date: 2021-06-18
CIG SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the defect in the prior art that it is impossible to know whether the USB Type-C device inserted into the power adapter is a custom device, and to provide a detection circuit for the type of USB Type-C device and the power adapter

Method used

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  • Detection circuit and power adapter of usb Type-C device type

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Embodiment Construction

[0014] The present invention is further illustrated below by means of examples, but the present invention is not limited to the scope of the examples.

[0015] The present invention provides a detection circuit for a USB Type-C device type, which is used to detect the type of a USB Type-C device inserted into a Type-C plug of a power adapter. According to common knowledge in the field, the Type of the power adapter -C plugs generally have two rows of pins, that is, the first row of pins and the second row of pins. A11, A10, A9, A8, A7, A6, A5, A4, A3, A2, A1; the second row of pins are numbered B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12.

[0016] Such as figure 1 As shown, the detection circuit includes a NAND gate 1 , a NOT gate 2 , an OR gate 3 , a relay 4 , a first NMOS transistor 5 , a second NMOS transistor 6 and a DC-DC conversion circuit 7 .

[0017] The power adapter 8 is respectively connected to the power end of the NAND gate 1, the power end of the NOT gat...

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Abstract

The invention discloses a USB Type-C device type detection circuit and a power adapter. The detection circuit includes a NAND gate, a NOT gate, an OR gate, a relay, a first NMOS tube and a second NMOS tube; the gate of the first NMOS tube The output end of the NAND gate is electrically connected, the source is electrically connected to the B12 pin, the A1, A12, and B1 pins are respectively electrically connected to the input end of the NAND gate, and the output end of the NAND gate is electrically connected to an input end of the OR gate. Electrically connected, the other input end of the OR gate and the input end of the NOT gate are electrically connected to the relay, the gate of the second NMOS transistor is electrically connected to the output end of the OR gate, and the source is electrically connected to the relay, and the input circuit of the relay is connected to the relay. The power terminal of the Type-C plug is electrically connected. The detection circuit of the present invention can detect the type of the Type-C device inserted into the Type-C plug of the power adapter, and control the power output of the power adapter according to the detection result.

Description

technical field [0001] The invention relates to a USB Type-C device type detection circuit and a power adapter. Background technique [0002] The USB Type-C (a universal serial bus hardware interface specification) interface has been adopted by more and more electronic equipment manufacturers because of its portability, positive and negative insertion, and strong power supply capabilities, but not all manufacturers' Type-C -C devices conform to the Type-C definition of the USB standard. Many manufacturers use the Type-C interface as a custom function. When used as a custom function, the definition of each pin is not exactly the same as the USB protocol standard. Therefore, if the user misuses his power adapter to charge or connect his standard Type-C device (such as a mobile phone), it may cause the user's device to burn. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a USB Type-C device type detection circuit ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/68
CPCG01R31/68
Inventor 耿其炜
Owner CIG SHANGHAI CO LTD