CN108923383A - A kind of novel USB Type-C connector overheating protection circuit and its method for excessive heating protection - Google Patents
A kind of novel USB Type-C connector overheating protection circuit and its method for excessive heating protection Download PDFInfo
- Publication number
- CN108923383A CN108923383A CN201810990603.9A CN201810990603A CN108923383A CN 108923383 A CN108923383 A CN 108923383A CN 201810990603 A CN201810990603 A CN 201810990603A CN 108923383 A CN108923383 A CN 108923383A
- Authority
- CN
- China
- Prior art keywords
- port
- voltage
- connector
- control chip
- usb type
- Prior art date
- 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
Links
- 238000013021 overheating Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000010438 heat treatment Methods 0.000 title claims abstract description 11
- 239000004065 semiconductor Substances 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 2
- 238000011144 upstream manufacturing Methods 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 8
- 101100100146 Candida albicans NTC1 gene Proteins 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 101000669528 Homo sapiens Tachykinin-4 Proteins 0.000 description 4
- OKUGPJPKMAEJOE-UHFFFAOYSA-N S-propyl dipropylcarbamothioate Chemical compound CCCSC(=O)N(CCC)CCC OKUGPJPKMAEJOE-UHFFFAOYSA-N 0.000 description 4
- 102100039365 Tachykinin-4 Human genes 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003550 marker Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000005779 cell damage Effects 0.000 description 1
- 208000037887 cell injury Diseases 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/042—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using temperature dependent resistors
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of novel USB Type-C connector overheating protection circuit and its method for excessive heating protection; it includes the first protection location, the second protection location; the structure of first protection location is identical with the symmetrical configuration of the second protection location, and the first protection location and the second protection location are integrated in the first pcb board and the second pcb board at Type-C connector port respectively.The present invention utilizes the specification of USB Type-C system, USB Type-C connector interface when the temperature is excessively high, change the condition of contact of power supply and equipment room by control chip; system is set to automatically cut off the power circuit; simple and reliable to play the purpose of overheating protection, practicability is high；Additional voltage drop will not be generated on USB Type-C connecting line, system effectiveness is high；Protection location structure is simple, small in size without using high-voltage power pipe, at low cost, is easily integrated.
Description
Technical field
The present invention relates to a kind of overheating protection circuit and its method for excessive heating protection more particularly to a kind of novel USB
Type-C connector overheating protection circuit and its method for excessive heating protection.
Background technique
It is widely used in the USB Type-C connector of the electronic products such as mobile phone, notebook, digital camera at present with it
Excellent performance, slim design, are pursued energetically by developer and user.Meet the Type-C connector of 3.1 standard of USB more
Be have two-sided inserting, a bite is mostly used (power supply, USB transmission, VGA/HDMI), transmission speed fast (highest 10Gbps), interface are inserted
Seat designs the advantages that slim (8.3mm × 2.5mm) and power transmission capacity strong (highest 100W).And Type-C connector exists
When as charge connector, power supply capacity can achieve 20V/5A, portable set this satisfies battery capacity is ever-increasing
The demand of standby quick charge.USB Type-C connector not only can be carried out the high-speed transfer of data, but also be able to achieve quickly filling for power supply
Electricity.
However, although Type-C connector has many advantages, such as power supply capacity is strong, connector interface jack sizes
Small and foot spacing is narrow, when peripheral cell damage, humid environment, ageing of metal deformation and external pressure cause pin to be bent,
It will make the V of wiring boardBUSShort circuit occurs with GND.If carrying out large current charge at this time, the heat that wiring board generates can directly be led
Wiring board is caused to burn.Even if, because wearing or having foreign matter when contact resistance exception occurs in Type-C interface, leading to there is no short circuit
The charging current for crossing Type-C connector is larger, will also result in Type-C interface heating burnout.The needs when there is heating problem
Cutting charge circuit in time, is just avoided that the generation of above situation, but when port overheats, equipment end and the equal nothing of power end
Method is directly found out, thus until terminal burn even it is on fire.
In response to the above problems, presently, there are solution be that excess temperature is installed on the port of USB Type-C connector
Protective device cuts off current loop when detecting temperature anomaly.Temperature protective device can for mini-Breaker, PPTC or
The control chip that cooperation high-voltage circuit breaker and thermistor use.Mini-Breaker, PPTC are usually connected when in use
On Vbus line, wherein mini-Breaker is that one kind can restore temperature detect switch (TDS), is triggered when there is temperature anomaly, electric at this time
Source is cut off, and until temperature restores normal, temperature detect switch (TDS) restores automatically；PPTC is otherwise known as self-recovery fuse, work
Process is similar with temperature detect switch (TDS), but advantage is had more in volume and cost.However, using the maximum of mini-Breaker and PPTC
Defect is that there are larger pressure drops, can reduce the charge efficiency of power supply in normal work.It, can be in order to improve power supply conversion efficiency
It was carried out in the control chip that the interface of USB Type-C connector is used plus cooperation high-voltage circuit breaker and thermistor
Thermal protection, as shown in Figure 1.The height at high-voltage power pipe M1, high-voltage power pipe M2 and second port when charging, at first port
Pressure power tube M3, high-voltage power pipe M4 are opened, when first port or second port when the temperature is excessively high, chip controls first port
High-voltage power pipe M3, high-voltage power pipe M4 at high-voltage power pipe M1, the high-voltage power pipe M2 or second port at place are closed, power supply
It does not cut off.Even if the conduction voltage drop of the metal-oxide-semiconductor used can be very low, but symmetrical due to the structure of USB Type-C connecting line
Property, need to meet the current direction of the both direction of no direction, therefore each port is both needed to just can ensure that using two-switch control
Electric current when hot on power supply line is completely severed, while guaranteeing that control chip has electricity always, therefore overheated using the program
4 high-voltage power pipes and 2 thermistors must be used when protection simultaneously, thus voltage drop still can be very big, loss is high, cost
Also higher.
Summary of the invention
The technical problem to be solved by the present invention is in order to overcome the defects of the prior art, now provide a kind of novel USB
Type-C connector overheating protection circuit realizes bonder terminal overheating protection, simple and reliable, is easily integrated, and practicability is high；
It does not need in VBUSSeries connection temperature detect switch (TDS) or self-recovery fuse on power supply line, will not be in VBUSAdditional voltage drop, efficiency are generated on line
It is high；It does not need using high-voltage power pipe etc., circuit cost is low.
The present invention is to solve above-mentioned technical problem by following technical proposals：
A kind of novel USB Type-C connector overheating protection circuit of the present invention, it is characterized in that, the novel USB
Type-C connector overheating protection circuit includes the first protection location and the second protection location, the structure of first protection location
Identical with the symmetrical configuration of second protection location, first protection location and second protection location are integrated in respectively
The second pcb board at the first pcb board and second port at the first port of the USB Type-C connector, described first protects
Shield unit and second protection location are connect with the channel layout line of the USB Type-C connector, first protection
Unit and second protection location be used to detect the temperature of the first port at the both ends for being distributed in the Type-C connector with
The temperature of second port.
Preferably, first protection location includes the first control chip, first resistor and the first thermistor, and described the
Two protection locations include the second control chip, second resistance and the second thermistor, first thermistor and described second
Thermistor is used to detect the temperature of the first port of the Type-C connector and the temperature of the second port,
In：
One end of first thermistor, second thermistor one end, it is described first control chip power supply
The power end of end and the second control chip is all connected with the V of the Type-C connectorBUSPower supply line, first electricity
One end of resistance, one end of the second resistance, the ground terminal of the first control chip and described second control the ground connection of chip
End is grounded, and the other end and described first of the first resistor is connected in parallel in the temperature sensing end of the first control chip
The voltage controling end of the other end of thermistor, the first control chip is connect with the channel layout line of the first port,
The other end and second thermistor of the second resistance is connected in parallel in the temperature sensing end of the second control chip
The other end, the voltage controling end of second chip connect with the channel layout line of the second port.
Preferably, the first control chip and described second controls chip by the V of Type-C connectorBUSPower supply line supplies
Electricity, power supply voltage range is between 3.3V~21V.Preferably, the first control chip includes amplifier, comparator, low pressure
The in-phase end of metal-oxide-semiconductor, 3rd resistor and the 4th resistance, the amplifier connects internal reference voltage, and the reference voltage is used for
It is compared with temperature sampling signal, the reverse side of the amplifier and described low is connected in parallel in the output end of the amplifier
Press the drain electrode of metal-oxide-semiconductor, the backward end of the comparator be connected in parallel the 3rd resistor one end and the 4th resistance
One end, the in-phase end of the comparator connect the temperature sensing end of the first control chip, the output of the comparator
End connects the grid of the low pressure metal-oxide-semiconductor, and the other end of the 3rd resistor connects the power supply of the first control chip
End, the other end of the 4th resistance connect the ground terminal of the first control chip, and the source electrode of the low pressure metal-oxide-semiconductor connects
Connect the voltage controling end of the first control chip, the structure phase of the second control chip and the first control chip
Together.
Preferably, the voltage control of the voltage controling end of the first control chip and the second control chip
End processed is used to be the channel layout line output channel voltage, and the channel voltage is greater than 2.75V.
Preferably, when having eMarker chip at the usv Type-C connector port, the circuit protection unit is also
It can be integrated on eMarker chip.
A kind of method for excessive heating protection using novel USB Type-C connector overheating protection circuit, it is characterized in that,
Its step includes：
Power supply and electronic equipment are connected to the institute of the novel USB Type-C connector overheating protection circuit
First port and the second port are stated, to there is voltage on the 2nd VBUS power supply line, the channel of the first port is matched
It sets line and detects the feedback voltage of the second port persistently to ensure that the electronic equipment is in access state；
When the first port temperature connecting with the power supply rises, the temperature sensing end of the first control chip
The first voltage value that obtains the first voltage value at the first resistor both ends, and will acquire and the first preset voltage value carry out
Compare, when the first voltage value exceeds first predeterminated voltage, the voltage controling end of the first control chip is defeated
Out on interference voltage to the channel layout line of the first port, the feedback voltage of the second port is made to be greater than described the
The hanging voltage of the channel layout line of Single port, when the channel layout line of the first port detects the hanging voltage
Afterwards, then determine that the electronic equipment has disconnected, the first port, which generates, removes the power supply movement, to realize that overheat is protected
Shield；
When the second port temperature connecting with the electronic equipment rises, the temperature of the first control chip
The second voltage value that degree end of probe obtains the second voltage value at the second resistance both ends, and will acquire and the second default electricity
Pressure value is compared, when the second voltage value exceeds second predeterminated voltage, the voltage of the second control chip
Control terminal exports on interference voltage to the channel layout line of the second port, keeps the feedback voltage of the second port big
In the hanging voltage of first port channel layout line, when the channel layout line of the first port detects the voltage
Afterwards, then determine that the electronic equipment has disconnected, the first port, which generates, removes the power supply movement, to realize that overheat is protected
Shield.
Preferably, when carrying out overheating protection, the access waiting time of the USB Type-C connector and judge the time
The sluggish control of protection is generated, to avoid the quick-speed turning on-off of charging process, thus the company's of reduction USB Type-C connector
The temperature of the temperature of the first port and the second port.
The positive effect of the present invention is that：
The present invention is only with control chip and NTC (Negative Temperature Coefficient, negative temperature system
Number) thermistor, using the specification of Type-C system, Type-C connector interface when the temperature is excessively high, by control chip come
The condition of contact for changing power supply and equipment room, makes system automatically cut off the power circuit, to play the purpose of overheating protection, simply
Reliably, practicability is high；Additional voltage drop will not be generated on Type-C connecting line, system effectiveness is high；Protection location structure is simple, nothing
High-voltage power pipe need to be used, it is small in size, it is at low cost, it is easily integrated.
Detailed description of the invention
The overheating protection circuit structural schematic diagram of Fig. 1 prior art.
Fig. 2 is the structural schematic diagram of Type-C connector.
Fig. 3 is overheating protection circuit structural schematic diagram of the invention.
Fig. 4 is the circuit connection diagram of the first control chip of preferred embodiment of the invention.
Fig. 5 is the system application schematic diagram of overheating protection circuit.
Specific embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a range.
Refer to Fig. 2, the novel USB type-C connector overheating protection circuit of the present invention, including the first protection location and
Second protection location, the structure of the first protection location is identical with the symmetrical configuration of the second protection location, the first protection location and
Two protection locations are integrated in the first pcb board at USB Type-C connector first port and second at second port respectively
The V of pcb board, the first protection location and the second protection location with USB Type-C connectorBUSPower supply line, ground wire and channel
Layout line connection, the first protection location and the second protection location are used to detect the first end at the both ends for being distributed in Type-C connector
The temperature of mouth and the temperature of second port.The heating problem when charging of Type-C connector need to be to solve due to the present invention,
Now the live part of USB Type-C connector is introduced first.Each pin of USB Type-C connector interface is defined as follows
Shown in table (table 1)：
Table 1
Table 1 is USB Type-C connector interface pinouts, wherein three groups of D (USB 2.0), TX/RX (USB 3.1) difference
Signal is made data transmission and is used, and CC1/CC2 is channel configuration pin, there are many effects, mainly uses CC1/CC2 in the present invention
Pin several effects as follows：Detection connection, distinguishes front and back sides, distinguishes DFP (Downstream Facing Port) and UFP
(Upstream Facing Port) configures VBUSTwo kinds of operating modes：USB Type-C and USB Power Delivery
(PD)。VBUSFor USB power source, GND is ground, and SBU is sideband bus.
There are five types of operational modes when carrying out power transmission for USB Type-C connector, and wherein USB PD operational mode has
Highest priority.As shown in table 2 below：
Table 2
When power end and equipment end are all satisfied USB PD agreement, power transmission is carried out by PD mode is preferentially followed.USB
Type-C connector equally meets backward compatible characteristic, i.e., compatible priority is lower than the operational mode of USB PD.Wherein second
VBUSPower transmission line of the power supply line between power end and equipment end, channel layout line (CC line) are used to carry out downstream end and upper
Communication between row end.USB Type-C connector is as follows from the process for being connected to progress power transmission：
The first step connects the end the A power supply of connector, and the end B is connect with electronic equipment, then the end A is downstream end, and the end B is upper
Row end, wherein downstream end can be by control metal-oxide-semiconductor M1, M2, M3 and M4 come the 2nd V of on/offBUSPower supply line；
Second step, according to direction of insertion, the CC1 pin of downstream end is connected by CC line with the CC1 pin of upstream ends；Downlink
End control first switch unit K1 and second switch unit K2, CC1, CC2 pin is connect with pull-up resistor Rp1, Rp2, uplink
CC1, CC2 pin at end are connect with pull down resistor Rd1, Rd2, and downstream end detects the pull down resistor of upstream ends CC line by CC line
The feedback voltage of Rd and after maintaining a period of time (100~200ms), determines there is an equipment access, downstream end controls VBUS conducting；On
After VBUS is detected at row end, determination has plant-grid connection
Third step, downstream end dynamic adjust the resistance value of the first pull-up resistor Rp1, the first different pull-up resistor Rp1 value tables
Show that downstream end provides different charging currents, the pull down resistor Rd1=5.1k Ω of upstream ends, downlink to upstream ends by VBUS
End determines that equipment is in connection status by the voltage VRd1 on detection Rd1.Flow through electric current, the pull-up resistor Rp resistance of VBUS
Value, pull down resistor both ends VRd and Vopen between relationship as shown in table 3 (wherein Vopen be equipment end CC line it is hanging when
Voltage)：
Table 3
| Power supply statement | USB Type-C electric current | Rp | VRd | Vopen |
| Default USB output power | 900mA | 56k Ω ± 20% | 0.25-1.5V | 1.65V |
| 1.5A@5V | 1.5A | 22k Ω ± 5% | 0.45-1.5V | 1.65V |
| 3A@5V | 3A | 10k Ω ± 5% | 0.85-2.45V | 2.75V |
4th step, in downstream end not using to CC2 pin VCONN is connected to by switch K2, VCONN is inside
Power supply signal.Preferably, the first pcb board connection may be provided with eMarker chip.VCONN is used to connect for USB Type-C
EMarker circuit power supply on mouth, eMarker circuit can realize the electronic marker of USB Type-C connector
(Electronically Marked Cable), to support USB PD mode.Electronic marker cable can determine the electricity of connecting line
The key properties such as current load ability, when power supply and equipment obey USB PD agreement, downstream end detects USB by eMarker
The current carrying capacities of Type-C connecting line, and by periodically sending Source_Capabilities message to equipment end come sound
Oneself bright power output capacity；After power end receives response GoodCRC of the equipment end to Source_Capabilities,
PD communication acknowledgement establish, USB Type-C connector work USB PD mode with carry out high-power output (>15W)；
5th step, downstream end detect the pull down resistor Rd1 of upstream ends persistently to ensure that equipment is in access state, once inspection
Voltage VRd1 >=Vopen is measured, illustrates that upstream ends CC line is hanging, equipment has disconnected, VPower supply on BUS and VCONN is removed,
CC1, CC2 pin enter high-impedance state (ZOPEN > 126k Ω)；After tErrorRecovery=25ms, upstream ends enter
Unattached.SNK (trap is not connected) state, equipment end wait the access of power supply, and downstream end enters the (source Unattached.SRC
It is not connected) state, the access of power end waiting facilities；
6th step, downstream end detect the pull down resistor Rd1 of upstream ends again, and wait for a period of time after (10~20ms)
Return step two, reenters charged state, if protection location detects that port temperature is still excessively high at this time, continues overheat and protects
Shield movement.As shown in figure 3, the first protection location of the present invention includes the first control chip IC 1, the heat of first resistor R1 and first
Quick resistance NTC1, second protection location include the second control chip IC 2, second resistance R2 and the second thermistor NTC2,
First thermistor NTC1 and the second thermistor NTC2 be used for detect USB Type-C connector first port temperature and
The temperature of the second port, wherein：
One end of the first thermistor NTC1 of the present invention, one end of the second thermistor NTC2, the first control chip IC 1
The power end VDD of the control chip IC 2 of power end VDD and second is all connected with the V of the USB Type-C connectorBUSPower supply
Line, one end of first resistor R1, one end of second resistance R2, the first ground terminal GND and second for controlling chip IC 1 control chip
The ground terminal GND of IC2 is grounded, and the another of first resistor R1 is connected in parallel in the temperature sensing end VT of the first control chip IC 1
The other end at end and the first thermistor NTC1, the voltage controling end V of the first control chip IC 1CTR1With the channel of first port
The other end and the second heat of second resistance R2 is connected in parallel in layout line connection, the temperature sensing end VT of the second control chip IC 2
The other end of quick resistance NTC2, the voltage controling end V of the second chip IC 2CTR2It is connect with the channel layout line of second port.
Preferably, the first control chip IC and second controls chip IC 2 by the V of the USB Type-C connectorBUS
Power supply line power supply, power supply voltage range is between 3.3V~21V.
Preferably, as shown in figure 4, it includes amplifier AMP, comparator CMP, low pressure MOS that the present invention first, which controls chip IC 1,
The in-phase end of pipe M1,3rd resistor R3 and the 4th resistance R4, amplifier AMP connect internal reference voltage VREF, reference voltage VREF
For being compared with temperature sampling signal, the reverse side and low pressure MOS of amplifier is connected in parallel in the output end of amplifier AMP
The drain electrode of pipe M1, the backward end of comparator CMP are connected in parallel one end of 3rd resistor R3 and one end of the 4th resistance R4, compare
The temperature sensing end VT of in-phase end connection the first control chip IC 1 of device CMP, the output end of comparator CMP connect low pressure metal-oxide-semiconductor
The other end of the grid of M1, the power end VDD, the 4th resistance R4 of other end connection the first control chip IC of 3rd resistor R3 connects
Connect the ground terminal GND of the first control chip IC 1, the voltage controling end of source electrode connection the first control chip IC 1 of low pressure metal-oxide-semiconductor M1
VCTR1, second control chip IC 2 with first control the structure of chip IC 1 it is identical.
Preferably, the voltage control of the control chip IC 2 of voltage controling end VT and second of electricity the first control chip IC 1
Holding VT to be used for is channel layout line, that is, CC1 line and CC2 line output channel voltage, and the channel voltage is greater than 2.75V.
With reference to Fig. 5, a kind of method for excessive heating protection using novel USB Type-C connector overheating protection circuit, step
Suddenly include：
When power supply and not connected equipment, VBUSNo-voltage on power supply line, protection location not power consumption, sets when by power supply and electronics
The standby first port and the second end for being connected to the novel USB Type-C connector overheating protection circuit
Mouthful, to there is voltage on the 2nd VBUS power supply line, the channel layout line CC1 line of the first port persistently detects the second end
Mouthful pull down resistor Rd1 or pull down resistor Rd2 on feedback voltage be in access state to ensure the electronic equipment, distinguish shape
At power end and equipment end.
When the first port connecting with the power supply i.e. power end temperature rises, the first protection location is used for power end
Interface carries out overheating protection, and the temperature sensing end VT of the first control chip IC 1 obtains first electricity at the both ends the first resistor R1
Pressure value VR1, and the first voltage value V that will acquireR1It is compared with the first preset voltage value, when the first voltage value is beyond described the
One predeterminated voltage, the voltage controling end VT of the first control chip IC 1 export interference voltage to the channel layout line CC of first port
On line, the channel for making the feedback voltage on the pull down resistor Rd1 or pull down resistor Rd2 of the second port be greater than first port is matched
The hanging voltage for setting line then determines that electronic equipment has disconnected after the channel layout line of first port detects hanging voltage,
First port, which generates, removes power supply movement, to realize overheating protection；That is, the first protection is single with the rising of temperature
For carrying out overheating protection to power supply end interface, the temperature sensing end VT of the overheating protection unit first control chip IC 1 is obtained member
Take the first voltage value V at the both ends first resistor R1R1, and the first voltage value V that will acquireR1With the voltage at the both ends second resistance R2
VR2It is compared, the first thermistor NTC1 resistance decrease, the first voltage value VR1Rise, as the first voltage value VR1More than VR4When,
Comparator exports high level, and low pressure metal-oxide-semiconductor M1 is opened, and source electrode exports VREFVoltage.The voltage control of first control chip IC 1 at this time
End V processedCTRLInterference voltage, the actuation voltage V for the second port for detecting the CC line of first port are exported to CC lineRdIt is greater than
Voltage when CC1 pin floating, therefore, it is determined that electronic equipment has disconnected, first port, which generates, removes VBUSPower supply movement；
When the second port temperature connecting with electronic equipment rises, the temperature sensing end of the first control chip IC 1
Obtain the second voltage value V at the both ends second resistance R2R2, and the second voltage value V that will acquireR2It is carried out with the second preset voltage value
Compare, as second voltage value VR2Beyond the second predeterminated voltage, the voltage controling end output interference voltage of the second control chip IC 2 is arrived
On the channel layout line CC2 line of second port, the feedback voltage of second port is made to be greater than the hanging of first port channel layout line
Voltage then determines that electronic equipment has disconnected, first port generates after the channel layout line of first port detects the voltage
The power supply movement is removed, to realize overheating protection；That is when equipment end temperature rise, the second protection location for pair
Equipment end interface carries out overheating protection, and the temperature sensing end VT which controls chip IC 2 obtains the second electricity
Hinder the first voltage value V at the both ends R2R2, and the second voltage value V that will acquireR2With the voltage V at the 4th both ends resistance R4R4Compared
Compared with the rising of temperature, the second thermistor NTC2 resistance decrease, second voltage value VR2Rise, as second voltage value VR2It is super
Cross VR4When, comparator exports high level, and low pressure metal-oxide-semiconductor M1 is opened, and source electrode exports VREFVoltage.Second control chip IC 2 at this time
Voltage controling end VCTRLInterference voltage, the actuation voltage V for the second port for detecting the CC line of first port are exported to CC lineRd
Voltage when greater than CC1 pin floating, therefore, it is determined that electronic equipment has disconnected, first port, which generates, removes VBUSPower supply movement；
Then, first port enters waiting facilities connection status, and is kept for a period of time (10~20ms), it will be later
After detecting the feedback voltage of pull down resistor Rd1, Rd2 of second port and maintaining a period of time (100~200ms), build again
The connection of vertical power supply and electric room, if still to detect connector port temperature excessively high for protection location at this time, will continue into
Row overheating protection.The access waiting time of USB Type-C connector can produce the sluggish of protection and control with the time is judged, to keep away
Exempt from the quick-speed turning on-off of charging process, so that the port temperature of connector be effectively reduced.
When carrying out overheating protection, the access waiting time of USB Type-C connector generates the slow of protection with the time is judged
Stagnant control, to avoid the quick-speed turning on-off of charging process, so that the temperature of the first port of USB Type-C connector be effectively reduced
With the temperature of second port.
The present invention is based on USB Type-C connectors to be connected using the specification of USB Type-C system in USB Type-C
Connect device interface temperature it is excessively high when, change the condition of contact of power supply and equipment room by control chip, system made to automatically cut off electricity
Resource loop, to play the purpose of overheating protection, simple and reliable, practicability is high；It will not be generated on USB Type-C connecting line
Additional voltage drop, system effectiveness are high；Protection location structure is simple, small in size without using high-voltage power pipe, at low cost, is easy to collect
At.
The present invention has been described in detail with reference to the accompanying drawings, those skilled in the art can be according to upper
It states and bright many variations example is made to the present invention.All within the spirits and principles of the present invention, it is made it is any modification, equally replace
It changes, improve, should all be included in the protection scope of the present invention.Thus, certain details in embodiment should not be constituted to this
The restriction of invention, the present invention will be using the ranges that the appended claims define as protection scope of the present invention.
Claims (8)
1. a kind of novel USB Type-C connector overheating protection circuit, which is characterized in that the novel USB type-C
Connector overheating protection circuit includes the first protection location and the second protection location, the structure of first protection location and described
The symmetrical configuration of second protection location is identical, and first protection location and second protection location are integrated in USB respectively
The second pcb board at the first pcb board and second port at Type-C connector first port, first protection location and institute
State V of second protection location with the USB Type-C connectorBUSPower supply line, ground wire and the connection of channel layout line, described the
One protection location and second protection location are used to detect the first port at the both ends for being distributed in the Type-C connector
The temperature of temperature and second port.
2. novel USB Type-C connector overheating protection circuit according to claim 1, which is characterized in that described
One protection location includes the first control chip, first resistor and the first thermistor, and second protection location includes the second control
Coremaking piece, second resistance and the second thermistor, first thermistor and second thermistor are described for detecting
The temperature of the first port of Type-C connector and the temperature of the second port, wherein：
One end of first thermistor, second thermistor one end, it is described first control chip power end and
The power end of the second control chip is all connected with the V of the USB Type-C connectorBUSPower supply line, first electricity
One end of resistance, one end of the second resistance, the ground terminal of the first control chip and described second control the ground connection of chip
End is grounded, and the other end and described first of the first resistor is connected in parallel in the temperature sensing end of the first control chip
The voltage controling end of the other end of thermistor, the first control chip is connect with the channel layout line of the first port,
The other end and second thermistor of the second resistance is connected in parallel in the temperature sensing end of the second control chip
The other end, the voltage controling end of second chip connect with the channel layout line of the second port.
3. novel USB Type-C connector overheating protection circuit according to claim 2, which is characterized in that described
One control chip and described second controls chip by the V of the USB Type-C connectorBUSPower supply line power supply, power supply electricity
Press range between 3.3V~21V.
4. novel USB type-C connector overheating protection circuit according to claim 3, which is characterized in that described
One control chip includes amplifier, comparator, low pressure metal-oxide-semiconductor, 3rd resistor and the 4th resistance, and the in-phase end of the amplifier connects
Internal reference voltage is connect, the reference voltage is used for and temperature sampling signal is compared, and the output end of the amplifier is in parallel
Ground connects the drain electrode of the reverse side and the low pressure metal-oxide-semiconductor of the amplifier, and institute is connected in parallel in the backward end of the comparator
One end of 3rd resistor and one end of the 4th resistance are stated, the in-phase end of the comparator connects the first control chip
The temperature sensing end, the output end of the comparator connect the grid of the low pressure metal-oxide-semiconductor, the other end of the 3rd resistor
The power end of the first control chip is connected, the other end of the 4th resistance connects the institute of the first control chip
Ground terminal is stated, the source electrode of the low pressure metal-oxide-semiconductor connects the voltage controling end of the first control chip, second control
Chip is identical as the first control structure of chip.
5. novel USB Type-C connector overheating protection circuit according to claim 4, which is characterized in that described
The voltage controling end of the voltage controling end of one control chip and the second control chip is used to match for the channel
Line output channel voltage is set, the channel voltage is greater than 2.75V.
6. novel USB-Type-C connector overheating protection circuit according to claim 5, which is characterized in that when described
When having eMarker chip at USB Type-C connector port, the circuit protection unit can also be integrated in eMarker chip
On.
7. a kind of method for excessive heating protection using novel USB Type-C connector overheating protection circuit, which is characterized in that its
Step includes：
Power supply and electronic equipment are connected to described the of the novel USB Type-C connector overheating protection circuit
Single port and the second port, thus the VBUSThere is voltage on power supply line, the channel layout line of the first port is persistently examined
The feedback voltage of the second port is surveyed to ensure that the electronic equipment is in access state；
When the first port temperature connecting with the power supply rises, the temperature sensing end of the first control chip is obtained
The first voltage value at the first resistor both ends, and the first voltage value that will acquire is compared with the first preset voltage value
Compared with when the first voltage value exceeds first predeterminated voltage, the voltage controling end output of the first control chip
On interference voltage to the channel layout line of the first port, the feedback voltage of the second port is made to be greater than described first
The hanging voltage of the channel layout line of port, when the channel layout line of the first port detects the hanging voltage
Afterwards, determine that the electronic equipment has disconnected, the first port, which generates, removes the power supply movement, to realize overheating protection；
When the second port temperature connecting with the electronic equipment rises, the temperature of the first control chip is visited
Survey the second voltage value and the second preset voltage value that end obtains the second voltage value at the second resistance both ends, and will acquire
It is compared, when the second voltage value exceeds second predeterminated voltage, the voltage control of the second control chip
On end output interference voltage to the channel layout line of the second port, the feedback voltage of the second port is made to be greater than institute
The hanging voltage for stating first port channel layout line, after the channel layout line of the first port detects the voltage,
Then determine that the electronic equipment has disconnected, the first port, which generates, removes the power supply movement, to realize overheating protection.
8. novel USB Type-C connector method for excessive heating protection according to claim 7, which is characterized in that carrying out
When overheating protection, the access waiting time of the USB Type-C connector generates the sluggish of protection and controls with the time is judged, with
The quick-speed turning on-off of charging process is avoided, to reduce the temperature of the Single port of connector and the temperature of the second port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810990603.9A CN108923383A (en) | 2018-08-28 | 2018-08-28 | A kind of novel USB Type-C connector overheating protection circuit and its method for excessive heating protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810990603.9A CN108923383A (en) | 2018-08-28 | 2018-08-28 | A kind of novel USB Type-C connector overheating protection circuit and its method for excessive heating protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108923383A true CN108923383A (en) | 2018-11-30 |
Family
ID=64407562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810990603.9A Pending CN108923383A (en) | 2018-08-28 | 2018-08-28 | A kind of novel USB Type-C connector overheating protection circuit and its method for excessive heating protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108923383A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111371940A (en) * | 2019-09-24 | 2020-07-03 | 上海南芯半导体科技有限公司 | Method for effectively detecting overheat burning of USB C port of mobile phone |
| CN112736860A (en) * | 2021-01-25 | 2021-04-30 | 深圳慧能泰半导体科技有限公司 | Fault protection circuit of USB cable and USB cable thereof |
| CN112838566A (en) * | 2021-04-21 | 2021-05-25 | 珠海智融科技有限公司 | Over-temperature protection circuit, method and system for Type-C interface |
| CN113474960A (en) * | 2019-02-27 | 2021-10-01 | 谷歌有限责任公司 | USB C-type port short-circuit protection |
| CN113784247A (en) * | 2021-08-30 | 2021-12-10 | 维沃移动通信有限公司 | Electronic equipment, earphone patch cord and electronic equipment subassembly |
| TWI769849B (en) * | 2020-06-26 | 2022-07-01 | 加拿大商萬國半導體國際有限合夥公司 | Port controller with real-time fault detection |
| EP3989373A4 (en) * | 2019-06-18 | 2022-07-27 | Vivo Mobile Communication Co., Ltd. | Connector |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150048804A1 (en) * | 2013-08-14 | 2015-02-19 | Nokia Corporation | Charging connector overheat detection and protection apparatus |
| CN106100027A (en) * | 2016-06-27 | 2016-11-09 | 深圳天珑无线科技有限公司 | Charger and the short-circuit protection circuit for charging inlet |
| US20170277251A1 (en) * | 2016-03-24 | 2017-09-28 | Chengdu Monolithic Power Systems Co., Ltd. | Adaptive power supply circuit and system |
| CN108321858A (en) * | 2017-01-16 | 2018-07-24 | 华硕电脑股份有限公司 | Charge protection device and its method |
| CN209134051U (en) * | 2018-08-28 | 2019-07-19 | 苏州力生美半导体有限公司 | A kind of novel USB Type-C connector overheating protection circuit |
-
2018
- 2018-08-28 CN CN201810990603.9A patent/CN108923383A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150048804A1 (en) * | 2013-08-14 | 2015-02-19 | Nokia Corporation | Charging connector overheat detection and protection apparatus |
| US20170277251A1 (en) * | 2016-03-24 | 2017-09-28 | Chengdu Monolithic Power Systems Co., Ltd. | Adaptive power supply circuit and system |
| CN106100027A (en) * | 2016-06-27 | 2016-11-09 | 深圳天珑无线科技有限公司 | Charger and the short-circuit protection circuit for charging inlet |
| CN108321858A (en) * | 2017-01-16 | 2018-07-24 | 华硕电脑股份有限公司 | Charge protection device and its method |
| CN209134051U (en) * | 2018-08-28 | 2019-07-19 | 苏州力生美半导体有限公司 | A kind of novel USB Type-C connector overheating protection circuit |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113474960A (en) * | 2019-02-27 | 2021-10-01 | 谷歌有限责任公司 | USB C-type port short-circuit protection |
| CN113474960B (en) * | 2019-02-27 | 2024-03-08 | 谷歌有限责任公司 | USB C-type port short-circuit protection |
| EP3989373A4 (en) * | 2019-06-18 | 2022-07-27 | Vivo Mobile Communication Co., Ltd. | Connector |
| CN111371940A (en) * | 2019-09-24 | 2020-07-03 | 上海南芯半导体科技有限公司 | Method for effectively detecting overheat burning of USB C port of mobile phone |
| TWI769849B (en) * | 2020-06-26 | 2022-07-01 | 加拿大商萬國半導體國際有限合夥公司 | Port controller with real-time fault detection |
| US11809249B2 (en) | 2020-06-26 | 2023-11-07 | Alpha And Omega Semiconductor International Lp | Port controller with real-time fault detection |
| CN112736860A (en) * | 2021-01-25 | 2021-04-30 | 深圳慧能泰半导体科技有限公司 | Fault protection circuit of USB cable and USB cable thereof |
| CN112838566A (en) * | 2021-04-21 | 2021-05-25 | 珠海智融科技有限公司 | Over-temperature protection circuit, method and system for Type-C interface |
| CN113784247A (en) * | 2021-08-30 | 2021-12-10 | 维沃移动通信有限公司 | Electronic equipment, earphone patch cord and electronic equipment subassembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108923383A (en) | A kind of novel USB Type-C connector overheating protection circuit and its method for excessive heating protection | |
| CN209134051U (en) | A kind of novel USB Type-C connector overheating protection circuit | |
| EP2843795B1 (en) | Charging connector overheat detection and protection apparatus | |
| WO2016074391A1 (en) | Power adapter and terminal | |
| CN104767260A (en) | Charger, terminal device and charging system | |
| US20130335010A1 (en) | Connector and control chip | |
| CN211605566U (en) | USBType-C connects, USB data line and battery charging outfit | |
| CN106100027A (en) | Charger and the short-circuit protection circuit for charging inlet | |
| CN108281991A (en) | A kind of circuit protection circuit, method and power cable | |
| CN205231376U (en) | USB cable | |
| CN207410011U (en) | A kind of control circuit and charging wire | |
| CN108429092A (en) | A kind of connector | |
| CN209217745U (en) | Charging control circuit, charging cable and charging unit | |
| CN110120691A (en) | A kind of charging base | |
| CN206685915U (en) | A kind of circuit protection circuit and power cable | |
| CN109491493A (en) | Dynamic power control technology and expansion seat with dynamic power control technology | |
| CN106887832B (en) | A kind of circuit for protecting terminal chip USB interface | |
| JP6233756B2 (en) | Universal serial bus with temperature detection | |
| CN111509504A (en) | Method for improving data line protection function | |
| CN210167609U (en) | Data line with heating protection function | |
| CN206379583U (en) | Universal serial bus connector | |
| CN218678426U (en) | Data line control by temperature change detects protection circuit | |
| CN206237163U (en) | A kind of voltage-stabilizing output circuit | |
| CN110531840B (en) | Mainboard and terminal equipment | |
| CN105703407A (en) | Mobile phone charger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 215123 unit 15-401, creative industry park, 328 Xinghu street, Suzhou Industrial Park, Suzhou City, Jiangsu Province Applicant after: LII SEMICONDUCTOR Co.,Ltd. Address before: 215123 unit 9-802, creative industrial park, No. 328, Xinghu street, Suzhou Industrial Park, Suzhou City, Jiangsu Province Applicant before: LII SEMICONDUCTOR Co.,Ltd. |