CN105954644B - Public first intellectual detection system of USBType-C interface and protection circuit - Google Patents
Public first intellectual detection system of USBType-C interface and protection circuit Download PDFInfo
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- CN105954644B CN105954644B CN201610492861.5A CN201610492861A CN105954644B CN 105954644 B CN105954644 B CN 105954644B CN 201610492861 A CN201610492861 A CN 201610492861A CN 105954644 B CN105954644 B CN 105954644B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/28—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
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Abstract
The invention relates to an intelligent detection and protection circuit for a USB Type-C interface male connector, the circuit comprises a USB Type-C interface male intelligent detection and protection circuit, the circuit comprises a male pin, an internal or other side male pin, a switch and a protection detection module, one end of the switch is connected with the pin of the male head, the other end of the switch is connected with the pin of the male head at the inner part or the other side, the protection detection module is connected with the male pin and comprises a short circuit detection module, a test voltage control module and a switch control module, the short circuit detection module is used for detecting the voltage or the current of the male pin and can be closed, the test voltage control module is used for providing voltage for the VBUS, and the switch control module is used for controlling the on and off of the switch according to the voltage obtained by detection of the short-circuit detection module. The circuit can realize intelligent detection, and prevent the damage caused by short circuit to the maximum extent.
Description
Technical Field
The invention relates to an intelligent detection and protection circuit for a USB Type-C interface male connector.
Background
The Type-C is a connecting interface of the USB interface, can be inserted without dividing the front side and the back side, has the size of about 8.3mm multiplied by 2.5mm, and supports the functions of charging, data transmission, display output and the like of the USB standard like other interfaces. Type-C was established by USBImplementers Forum and began to spread after 2014 with the support of apple, Google, Intel, Microsoft and other vendors. 8, 1 month and 2015, a special core provided a mobile solid-state hard disk with a global top Type-C interface. 10/2015, Tewei Ma released the first USB 3.1 Type-C interface disk array worldwide.
The USB Type-C interface has the characteristics of miniaturization, dense pin arrangement and large pin voltage range variation, wherein 5V working voltage can be supported by a CC pin, a TX/RX pin, a DP/DM pin and an SBU pin, and 20V can be supported by a VBUS pin at most. Therefore, when contamination is present, a short circuit condition is likely to occur, causing a high voltage on VBUS to appear on the other 5V pin, causing interface and device damage.
Disclosure of Invention
In order to solve the technical problem, the invention provides an intelligent detection and protection circuit for a USB Type-C interface male connector, which comprises a male connector pin, an internal or other side male connector pin, a switch and a protection detection module, wherein one end of the switch is connected with the male connector pin, the other end of the switch is connected with the internal or other side male connector pin, the protection detection module is connected with the male connector pin, the protection detection module comprises a short circuit detection module, a test voltage control module and a switch control module, the short circuit detection module is used for detecting the voltage or current of the male connector pin, the short circuit detection module can be turned off, the test voltage control module is used for providing voltage for VBUS, and the switch control module is used for controlling the on and off of the switch according to the voltage detected by the short circuit detection module.
The male pin comprises a VBUS pin, a CC pin, a DP pin, a DM pin, an SBU1 pin, an SBU2 pin, an RX2+ pin, an RX 2-pin, a TX 1-pin, a TX1+ pin, a TX2+ pin, a TX 2-pin, an RX1+ pin and an RX 1-pin.
The protection detection module is powered by VCONN or VBUS.
The switch is first in the off state at power up.
The switch is a high-voltage protection switch.
The test voltage control module is used for providing at least one voltage to the VBUS pin.
A USB device comprising the aforementioned circuitry.
An electronic device comprises the USB device.
An intelligent detection and protection method for a USB Type-C interface male head comprises a male head pin, an internal or other side male head pin, a switch and a protection detection module, wherein one end of the switch is connected with the male head pin, the other end of the switch is connected with the internal or other side male head pin, the protection detection module is connected with the male head pin, and the protection detection module comprises a short circuit detection module, a test voltage control module and a switch control module;
when the USB equipment is powered on, the switch is set to be in a cut-off state, and a voltage source Vtest is added to VBUS;
detecting a voltage Vsense or a current Isense of at least one pin;
judging whether the voltage or the current of the two pins are the same or not;
if yes, keeping the switch off, and disconnecting the detection circuit; if not, the switch is controlled to be on, and the detection circuit is disconnected.
An intelligent detection and protection method for a USB Type-C interface male head comprises a male head pin, an internal or other side male head pin, a switch and a protection detection module, wherein one end of the switch is connected with the male head pin, the other end of the switch is connected with the internal or other side male head pin, the protection detection module is connected with the male head pin, and the protection detection module comprises a short circuit detection module, a test voltage control module and a switch control module;
when the USB equipment is powered on, the switch is set to be in a cut-off state, and a plurality of different voltage sources Vtest are added to VBUS;
detecting a voltage Vsense or a current Isense of at least one pin;
judging whether the voltage or the current of the two pins always keeps the same;
if yes, keeping the switch off, and disconnecting the detection circuit; if not, the switch is controlled to be on, and the detection circuit is disconnected.
The method for detecting the short circuit of the pin by using the voltage Vtest can also be replaced by a current source Itest or other short circuit detection methods.
The above-described and other features, aspects, and advantages of the present application will become more apparent with reference to the following detailed description.
Drawings
Fig. 1 is a schematic diagram of a detection and protection circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one.
The utility model provides a public first intellectual detection system of USB Type-C interface and protection circuit, the circuit includes public first pin, the public first pin of inside or opposite side, switch and protection detection module, public first pin is connected to the one end of switch, and the pin of the public first of inside or opposite side is connected to the switch other end, protection detection module is connected with public first pin, protection detection module includes short circuit detection module, test voltage control module and on-off control module, and short circuit detection module can realize through pull-down resistance, and the voltage that obtains passes through analog-to-digital conversion, and the data that obtain pass through logical judgement to realize the judgement and the control switch of short circuit switch on with cut off and detection circuit open and close. The short circuit detection module is used for detecting the voltage or the current of the male pin, the short circuit detection module can be turned off, the test voltage control module is used for providing voltage for the VBUS, and the switch control module is used for controlling the on-off of the switch according to the voltage detected by the short circuit detection module. As a preferable technical scheme, the male pin comprises a VBUS pin, a CC pin, a DP pin, a DM pin, an SBU1 pin, an SBU2 pin, an RX2+ pin, an RX 2-pin, a TX 1-pin, a TX1+ pin, a TX2+ pin, a TX 2-pin, an RX1+ pin and an RX 1-pin. As a preferred technical solution, the protection detection module is powered by VCONN or VBUS. As a preferred technical solution, the switch is first in a cut-off state when being powered on. As a preferred technical solution, the switch is a high-voltage protection switch. As a preferred technical solution, the test voltage control module is configured to provide at least one voltage to the VBUS pin.
The circuit of the invention adds a high-voltage protection switch in VBUS, CC, DP/DM and SBU which are easy to be damaged. On power up, these switches are first in the off state. And adding a test unit with Rd and Ra pull-down, and taking out 5V power supply of VCONN and VBUS to work the detection circuit.
A first power-on test: when the device is powered on, a specific voltage source Vtest, e.g. 1.2V, is applied to VBUS for a short period of time. Meanwhile, the voltages Vsense or the current Isense of the CC, DP/DM and SBU pins are measured. Under normal operating conditions, there is no short circuit between these pins, and therefore different voltages should be measured. If the same voltage is measured, it indicates that a short circuit condition exists.
And a second power-on test: to exclude contingencies in the test, the voltage of the test voltage source is changed and the test is performed again. The process is the same as the electrical test.
And (3) judging and alarming: if after many times of tests, only when no short circuit occurs, turn on VBUS, CC, DP/DM and the high-voltage protection switch on the SBU, and close the detection circuit, the public head of USB Type-C can normally work. If the short circuit exists, the VBUS, the CC, the DP/DM and the SBU are continuously disconnected, the detection circuit is disconnected, the male connector is kept in a high-impedance state, and the host end displays that no slave device is connected.
The invention also designs a USB device which comprises the circuit.
The invention also relates to an electronic device comprising the USB device.
An intelligent detection and protection method for a USB Type-C interface male head comprises a male head pin, an internal or other side male head pin, a switch and a protection detection module, wherein one end of the switch is connected with the male head pin, the other end of the switch is connected with the internal or other side male head pin, the protection detection module is connected with the male head pin, and the protection detection module comprises a short circuit detection module, a test voltage control module and a switch control module;
when the USB equipment is powered on, the switch is set to be in a cut-off state, and a voltage source Vtest is added to VBUS;
detecting a voltage Vsense or a current Isense of at least one pin;
judging whether the voltage or the current of the two pins are the same or not;
if yes, keeping the switch off, and disconnecting the detection circuit; if not, the switch is controlled to be on, and the detection circuit is disconnected.
In order to eliminate the contingency in the test, the voltage of the test voltage source is changed, the test is carried out again, when the USB equipment is powered on, the switch is set to be in a cut-off state, and a plurality of different voltage sources Vtest are added to VBUS;
detecting a voltage Vsense or a current Isense of at least one pin;
judging whether the voltage or the current of the two pins always keeps the same;
if yes, keeping the switch off, and disconnecting the detection circuit; if not, the switch is controlled to be on, and the detection circuit is disconnected.
Example 1
An intelligent detection and protection circuit for a male head of a USB Type-C interface is disclosed, which takes CC, DP/DM and SBU1/SBU2 as examples, wherein CC _ CON/DP _ CON/DM _ CON/SBU1_ CON/SBU2_ CON in FIG. 1 represents a pin on the male head of the USB Type-C, and CC _ INT/DP _ INT/DM _ INT/SBU1_ INT/SBU2_ INT represents a pin of the male head of the internal or the other side. The male pins of the interface include VBUS pin, CC pin CC _ CON, DP pin DP _ CON, DM pin DM _ CON, SBU1 pin SBU1_ CON, SBU2 pin SBU2_ CON, each male pin has corresponding internal or other male pins CC _ INT, DP _ INT, DM _ INT, SBU1_ INT, SBU2_ INT, a switch is arranged between each pin and the lead, a switch is arranged on the VBUS to control the connection and the disconnection of the VBUS and the connection and the disconnection of the pin, the circuit also comprises a protection detection module, the protection detection module comprises a short circuit detection module, a test voltage control module and a switch control module, the short circuit detection module is used for detecting the voltage or the current of the male pin and can be closed, the test voltage control module is used for providing voltage for the VBUS, and the switch control module is used for controlling the on and off of the switch according to the voltage obtained by detection of the short-circuit detection module. The protection detection module is powered by VCONN or VBUS. The test voltage control module may be operable to provide at least one voltage to the VBUS pin.
When the USB equipment is powered on, the switch is set to be in a cut-off state, and a voltage source Vtest is added to VBUS;
detecting a voltage Vsense of at least one pin;
judging whether the voltages of the two pins are the same or not;
if the voltage does not exist, turning on a high-voltage protection switch on VBUS, CC, DP/DM and SBU, and turning off the detection circuit; if the voltage is greater than the predetermined voltage, VBUS, CC, DP/DM and SBU are continuously disconnected, the detection circuit is disconnected, and the male plug is kept in a high-impedance state.
Example 2
An intelligent detection and protection circuit for a male head of a USB Type-C interface is disclosed, which takes CC, DP/DM and SBU1/SBU2 as examples, wherein CC _ CON/DP _ CON/DM _ CON/SBU1_ CON/SBU2_ CON in FIG. 1 represents a pin on the male head of the USB Type-C, and CC _ INT/DP _ INT/DM _ INT/SBU1_ INT/SBU2_ INT represents a pin of the male head of the internal or the other side. The male pins of the interface include VBUS pin, CC pin CC _ CON, DP pin DP _ CON, DM pin DM _ CON, SBU1 pin SBU1_ CON, SBU2 pin SBU2_ CON, each male pin has corresponding internal or other male pins CC _ INT, DP _ INT, DM _ INT, SBU1_ INT, SBU2_ INT, a switch is arranged between each pin and the lead, a switch is arranged on the VBUS to control the connection and the disconnection of the VBUS and the connection and the disconnection of the pin, the circuit also comprises a protection detection module, the protection detection module comprises a short circuit detection module, a test voltage control module and a switch control module, the short circuit detection module is used for detecting the voltage or the current of the male pin and can be closed, the test voltage control module is used for providing voltage for the VBUS, and the switch control module is used for controlling the on and off of the switch according to the voltage obtained by detection of the short-circuit detection module. The protection detection module is powered by VCONN or VBUS. The test voltage control module may be operable to provide at least one voltage to the VBUS pin.
When the USB equipment is powered on, the switch is set to be in a cut-off state, and 2 different voltage sources Vtest, 1.2V and 3V are added to VBUS;
detecting a voltage Vsense of a pin;
judging whether the voltages of the two pins are always kept the same or not;
if yes, turning on a high-voltage protection switch on VBUS, CC, DP/DM and SBU, and turning off a detection circuit; if not, then VBUS, CC, DP/DM and SBU are continuously disconnected, and the detection circuit is disconnected, and the male terminal is kept in a high-impedance state.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. All equivalent changes and modifications made according to the disclosure of the present invention are covered by the scope of the claims of the present invention.
Claims (7)
1. An intelligent detection and protection circuit for a USB Type-C interface male connector, the circuit comprises a USB Type-C interface male intelligent detection and protection circuit, the circuit comprises a male pin, an internal or other side male pin, a switch and a protection detection module, one end of the switch is connected with the pin of the male head, the other end of the switch is connected with the pin of the male head at the inner part or the other side, the protection detection module is connected with the male pin and comprises a short circuit detection module, a test voltage control module and a switch control module, the short circuit detection module is used for detecting the voltage or the current of the male pin and can be closed, the test voltage control module is used for providing voltage for the VBUS, and the switch control module is used for controlling the on and off of the switch according to the voltage obtained by detection of the short-circuit detection module;
the male pin comprises a VBUS pin, a CC pin, a DP pin, a DM pin, an SBU1 pin, an SBU2 pin, an RX2+ pin, an RX 2-pin, a TX 1-pin, a TX1+ pin, a TX2+ pin, a TX 2-pin, an RX1+ pin and an RX 1-pin;
the protection detection module is powered by VCONN or VBUS.
2. The USB Type-C interface male smart detection and protection circuit of claim 1, wherein the switch is first turned off when powered on.
3. The USBType-C interface male head intelligent detection and protection circuit of claim 1, wherein the switch is a high voltage protection switch.
4. The USBType-C interface male smart detection and protection circuit of claim 1, wherein the test voltage control module is configured to provide at least one voltage to the VBUS pin.
5. A USB device comprising the circuit of any one of claims 1-4.
6. An electronic device comprising the USB device of claim 5.
7. An intelligent detection and protection method for a USB Type-C interface male head comprises a male head pin, an internal or other side male head pin, a switch and a protection detection module, wherein one end of the switch is connected with the male head pin, the other end of the switch is connected with the internal or other side male head pin, the protection detection module is connected with the male head pin, and the protection detection module comprises a short circuit detection module, a test voltage control module and a switch control module;
when the USB equipment is powered on, the switch is set to be in a cut-off state, and a voltage source Vtest is added to VBUS;
detecting a voltage Vsense or a current Isense of at least one pin;
judging whether the voltage or the current of the two pins are the same or not;
if yes, keeping the switch off, and disconnecting the detection circuit; if not, the switch is controlled to be on, and the detection circuit is disconnected.
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| CN201610492861.5A CN105954644B (en) | 2016-06-30 | 2016-06-30 | Public first intellectual detection system of USBType-C interface and protection circuit |
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| CN201610492861.5A CN105954644B (en) | 2016-06-30 | 2016-06-30 | Public first intellectual detection system of USBType-C interface and protection circuit |
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| CN105954644B true CN105954644B (en) | 2020-02-07 |
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| CN108268388B (en) * | 2016-12-30 | 2019-12-03 | 维沃移动通信有限公司 | A kind of Type-C interface protective circuit and method, mobile terminal |
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| DE102018116913A1 (en) * | 2018-07-12 | 2020-01-16 | Smartmod Gmbh | Device and method for checking the functionality of a chip installed in a mobile device with a serial interface |
| CN111433756B (en) | 2018-07-24 | 2022-01-28 | 荣耀终端有限公司 | Terminal and Type C interface anti-corrosion method |
| CN108964194B (en) * | 2018-08-01 | 2020-06-12 | 维沃移动通信有限公司 | Mobile terminal and charging control method |
| KR102701856B1 (en) * | 2018-08-22 | 2024-09-02 | 삼성전자주식회사 | Circuit and method for protecting overvoltage in universal serial bus interface |
| CN112968428A (en) * | 2021-02-03 | 2021-06-15 | 深圳市普洛威电子有限公司 | Test switching protection plate and test method |
| CN113472340B (en) * | 2021-06-11 | 2023-11-21 | 上海南芯半导体科技股份有限公司 | Interface circuit for USB Type-C/PD communication and control method thereof |
| CN114325473B (en) * | 2021-12-24 | 2024-03-08 | 广州星际悦动股份有限公司 | Short circuit detection circuit, short circuit detection method, short circuit detection device, electronic equipment and storage medium |
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