CN210167609U

CN210167609U - Data line with heating protection function

Info

Publication number: CN210167609U
Application number: CN201920105080.5U
Authority: CN
Inventors: 刘芸鹤
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-01-22
Filing date: 2019-01-22
Publication date: 2020-03-20
Anticipated expiration: 2029-01-22

Abstract

The utility model discloses a data line with protect function generates heat, including the data line, the data line includes electric wire Vbus and reference line GND, and the one end of electric wire Vbus and the one end of reference line GND are all connected on the USB A plug, and the other end of electric wire Vbus other end and reference line GND all are connected on the protection circuit board with protect function generates heat, and protection circuit board is connected with the USB C plug, has solved the problem that data line plug and socket that exist among the prior art can be destroyed by high temperature and damage.

Description

Data line with heating protection function

Technical Field

The utility model belongs to the mobile intelligent terminal field relates to a data line with protect function generates heat.

Background

At present, a USB data line is widely used for supplying power to a mobile intelligent terminal, the technical specification of the USB data line is evolved from USB V1.0 to USB V3.2 at present, the power which can be transmitted by the data line is evolved from 2.5 watts to 100 watts, a standard A plug adapter USB C plug data line is used as a data line commonly used by the current mobile terminal and is used for connecting a power adapter and the mobile terminal, wherein the power adapter, the data line and the mobile intelligent terminal form a complete power supply system, a power line Vbus and a ground line GND form a complete power supply loop through two pairs of sockets, plugs and external equipment, electrical performance parameters and structural parameters of each part in the loop have strict requirements in the USB specification, each part is designed strictly according to the technical specification to ensure normal use, but because the USB C connector has a large number of signal pins (24 pins), a small space (0.2mm), and a small overall size, The structure is complex, foreign matters (such as dust, metal debris, liquid and the like) can enter between the internal space of the plug and the socket and pins when the plug and the socket are used for a long time of the data line, so that a micro short circuit (the insulation resistance is abnormally reduced and is approximately about 1 omega) between a power supply of the data line and the ground is caused, the protection function of the working power adapter is slow in response under the condition, the USB connector can be heated, and the plug and the socket can be damaged by high-temperature melting.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a data line with protect function generates heat has solved the data line plug that exists among the prior art and the problem that the socket can be destroyed by high temperature meltdown and damage.

The utility model provides a, a data line with protect function generates heat, including the data line, the data line includes electric wire Vbus and reference line GND, and the one end of electric wire Vbus and the one end of reference line GND are all connected on the USB A plug, and the other end of electric wire Vbus and the reference line GND other end are all connected on the protection circuit board with protect function generates heat, and protection circuit board is connected with the USB C plug.

The utility model discloses a characteristics still lie in:

the protection circuit board comprises a triode Q, a comparator UA, a divider resistor R and an NTC resistor which are respectively arranged between the wire Vbus and the reference line GND.

The first end of triode Q connects electric wire Vbus, and triode Q's second end connects reference line GND, and triode Q's third end connects comparator UA, and electric wire Vbus is connected to comparator UA's first end, and reference line GND is connected to comparator UA's second end.

Wire Vbus is connected to divider resistance R's one end, and divider resistance R is connected to the divider resistance R other end, and divider resistance R's one end is connected divider resistance R, and reference line GND is connected to divider resistance R's the other end.

NTC resistance one end is connected divider resistance R, and wire Vbus is connected to the other end of NTC resistance, the NTC resistance that divider resistance R's one end is connected, and the reference line GND is connected to the divider resistance R other end.

The third end of the comparator UA is connected between the divider resistor R and the divider resistor R, and the fourth end of the comparator UA is connected between the NTC resistor and the divider resistor R.

The utility model has the advantages that, the utility model relates to a data line with heating protection function, the temperature sensor NTC resistance is placed on the inside protection circuit board of data line USB C plug Vbus pin annex, can directly perceive the temperature variation of USB C plug pin, makes the protection circuit action fast, makes the power adapter stop supplying power, protects data line plug and socket not damaged by high temperature melting; in addition, the protection circuit board is connected with the USB C plug, so that the internal circuit of the mobile intelligent terminal cannot work mistakenly, and the reliability of the mobile terminal is improved.

Drawings

Fig. 1 is a schematic view illustrating a structural connection of a data line with a heating protection function according to the present invention;

fig. 2 is a schematic diagram of a data line circuit with a heat protection function according to the present invention;

fig. 3 is a flowchart of the work flow of the data line with the heating protection function of the present invention.

In the figure, 1, a power adapter, 2, a USB A socket, 3, a USB A plug, 4, a data line, 5, a protection circuit board, 6, a USBC plug, 7, a USB C socket, 8, a mobile terminal, 9, an NTC resistor, 10, a divider resistor R₃And 11. divider resistor R ₂12, divider resistor R₁And 13 comparators UA13, 14 triodes Q, 15 electric wires Vbus, 16 reference line GND.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The utility model relates to a data line with protection function generates heat, as shown in figure 1, including data line 4, the one end of data line 4 sets up USB A plug 3, USB A plug 3 can connect USB A socket 2, USB A socket 2 sets up the one end that keeps away from the power plug at power adapter 1, the other end of data line 4 sets up protection circuit board 5, protection circuit board 5 sets up inside USB C plug 6, USB C plug 6 can connect USB C socket 7, USB C socket 7 sets up on mobile terminal 8, as shown in figure 2, including data line 4, data line 4 includes electric wire Vbus15 and reference line GND16, the one end of electric wire Vbus15 and the one end of reference line GND16 all set up on USB A plug 3, the other end of electric wire Vbus15 and the other end of reference line GND16 all connect on protection circuit board 5 with protection function generates heat, protection circuit board 5 is connected with USB C plug 6, the protection circuit board 5 includes a transistor Q14, a comparator UA13, and a voltage dividing resistor R, which are respectively provided between the electric wire Vbus15 and the reference line GND16 ₁12 and an NTC resistor 9, wherein a first end of a triode Q14 is connected with a wire Vbus15, a second end of a triode Q14 is connected with a reference line GND16, a third end of the triode Q is connected with a comparator UA13, the comparator UA distinguishes and compares input signals, detects the change value of the input voltage, outputs the change value reversely when the change value exceeds a threshold value, a first end of a comparator UA13 is connected with the wire Vbus15, a second end of the comparator UA13 is connected with the reference line GND16, and a divider resistor R is connected with a voltage divider resistor R ₁12 has one end connected to a wire Vbus15 and a voltage dividing resistor R ₁12 the other end is connected with a divider resistor R ₂11, voltage dividing resistor R₂One end of 11 is connected with a divider resistor R ₁12, a voltage dividing resistor R ₂11 is connected to a reference line GND16 and a voltage dividing resistor R₁、R₂The resistance value and the power of the NTC resistor 9 are selected according to the actual requirement, one end of the NTC resistor is connected with a divider resistor R ₃10, the other end of the NTC resistor 9 is connected with a wire Vbus15 and a voltage dividing resistor R ₃10 NTC resistance 9 and divider resistance R connected at one end₃The other end of the reference line is connected with GND16, the NTC resistor is a negative temperature coefficient thermistor, the resistance value decreases along with the temperature rise, and the NTC resistor is positioned on the protective printed circuit board and close to a plurality of Vbus pin bonding pads of a power supply of a connector in the data line and used for rapidly detecting the connectorThe third end (inverting input end) of the temperature comparator UA13 is connected with the divider resistor R ₁12 and a voltage dividing resistor R ₂11, the fourth end (non-inverting input end) of the comparator UA13 is connected between the NTC resistor 9 and the voltage dividing resistor R₃Between 10 NTC resistance and the rest three divider resistances R₃、R₂、R₁The resistance ratio of (A) to (B) is: r₃/NTC>R₁/R₂。

As shown in fig. 3, the utility model relates to a data line with protect function generates heat, its working process does, uses after a period when mobile terminal 8, and different degrees can get into the foreign matter in its USB C socket 6, leads to electric wire Vbus (power signal) and reference line GND (reference signal) between the direct current resistance diminish. When the dc resistance reaches a certain value, a micro short circuit is formed (insulation resistance becomes abnormally small, approximately about 1 Ω); when a user supplies power to the micro-short-circuited mobile terminal 8 by using the data line 4, the power adapter 1 detects whether the output voltage is smaller than an internal short-circuit voltage detection threshold value (2.5-3.5V), if so, an internal short-circuit protection circuit in the power adapter 1 works and the output is closed; if not, the short-circuit protection circuit in the power adapter 1 does not work, the power adapter supplies power to the outside normally, the USB C plug 6 part generates heat abnormally, the NTC resistance is reduced, and the temperature is reduced from R₃The voltage of a point of a voltage division circuit consisting of the NTC is greater than R₁And R₂When the voltage of the voltage division circuit b is over, the comparator immediately reverses, the output voltage becomes high, the triode Q is conducted, the power adapter 1 is forced to enter a short-circuit protection state, the output voltage is closed, the connector of the data line 4 and the mobile terminal 8 stops heating, the connector is prevented from being damaged due to high-temperature heating, and the data line can be used for working after abnormal micro short circuit in the mobile terminal 8 is eliminated.

Claims

1. The utility model provides a data line with generate heat protect function, characterized in that, includes data line (4), data line (4) include electric wire Vbus (15) and reference line GND (16), the one end of electric wire Vbus (15) and the one end of reference line GND (16) all are connected on USB A plug (3), the other end of electric wire Vbus (15) and the other end of reference line GND (16) all are connected on protection circuit board (5) with generate heat protect function, protection circuit board (5) are connected with USB C plug (6).

2. The data line with heat generation protection function according to claim 1, wherein the protection circuit board (5) includes a transistor Q (14), a comparator UA (13), and a voltage dividing resistor R, which are respectively provided between the electric line Vbus (15) and the reference line GND (16)₁(12)、R₂(11)、R₃(10) And an NTC resistor (9).

3. The data line with the heat protection function according to claim 2, wherein a first end of the transistor Q (14) is connected to a wire Vbus (15), a second end of the transistor Q (14) is connected to a reference line GND (16), a third end of the transistor Q is connected to the comparator UA (13), a first end of the comparator UA (13) is connected to the wire Vbus (15), and a second end of the comparator UA (13) is connected to the reference line GND (16).

4. The data line with heat protection function as claimed in claim 3, wherein said voltage dividing resistor R₁(12) Is connected to a wire Vbus (15), and the voltage dividing resistor R₁(12) The other end is connected with a divider resistor R₂(11) The voltage dividing resistor R₂(11) One end of the voltage divider is connected with a voltage dividing resistor R₁(12) The voltage dividing resistor R₂(11) And the other end thereof is connected to a reference line GND (16).

5. The data line with the function of protecting against heat according to claim 4, wherein one end of said NTC resistor (9) is connected to a voltage dividing resistor R₃(10) The other end of the NTC resistor (9) is connected with a wire Vbus (15), and the divider resistor R₃(10) The NTC resistor (9) is connected with one end of the resistor, and the voltage dividing resistor R₃The other end is connected with a reference line GND (16).

6. The data line with heat protection function as claimed in claim 5, wherein the third terminal of said comparator UA (13) is connected to the voltage-dividing resistor R₁(12) And partial pressureResistance R₂(11) The fourth end of the comparator UA (13) is connected with the NTC resistor (9) and the divider resistor R₃(10) In the meantime.