CN208172786U - It is a kind of can overheat protector electric current self application multichannel USB output circuit - Google Patents
It is a kind of can overheat protector electric current self application multichannel USB output circuit Download PDFInfo
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- CN208172786U CN208172786U CN201721861766.4U CN201721861766U CN208172786U CN 208172786 U CN208172786 U CN 208172786U CN 201721861766 U CN201721861766 U CN 201721861766U CN 208172786 U CN208172786 U CN 208172786U
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Abstract
The utility model discloses it is a kind of can overheat protector electric current self application multichannel USB output circuit; including 5V output module; multiple USB link blocks; USB output control module; the USB control circuit module includes; USB monitoring unit receives USB voltage monitoring signal and generates USB current monitor signal, and controls USB voltage monitoring signal according to control signal；Temperature monitoring unit monitors the temperature of USB link block and USB detection unit, the temperature information of monitoring is sent to master control processing unit；Master control processing unit receives the temperature information of temperature monitoring unit transmission, receives the USB current monitor signal of USB detection unit transmission, issues the USB output of control signal to USB monitoring unit control USB link block.The utility model solves the problem of that each USB output fixed current of current multichannel USB can not adapt to respective access device.
Description
Technical field
The utility model relates to a kind of multichannel USB output circuit, more particularly to it is a kind of can overheat protector current automatic adaptation
Multichannel USB output circuit.
Background technique
USB interface, i.e. universal serial bus are a kind of serial bus standards for connecting computer system and external equipment,
It is a kind of technical specification of input/output interface, is widely used in the information communications product such as PC and mobile device,
And extend to other related fieldss such as photographic goods, DTV (set-top box), game machine.Just because of the extensive of USB interface
Using single USB output can not adapt to use demand, and more and more multichannel USB output equipments occur.But mesh
Preceding multichannel USB output existing on the market is specifically exactly there is usually one the current-limiting function of fixed size, all
USB port all exports fixed current, and size of current of its output of different USB ports cannot be adjusted, which results in each USB port without
Method is analyzed for output state, is not adapted dynamically the size of output electric current, and the output electric current that USB port itself limits is different
Surely it is suitable for access device, inappropriate output electric current makes charger and consuming device not in optimal use state, not only
Be lost electric energy can also injury device, shorten charger and consuming device service life.In this regard, people be badly in need of one kind can electric current from
The multichannel USB output device of adaptation, so that the electric current of each USB port output is adapted with its access device, so that charger
With consuming device all in optimal use state, the damage of more equipment is avoided.
Summary of the invention
The utility model provide it is a kind of can overheat protector current automatic adaptation multichannel USB output circuit, it is intended to solve mesh
The problem of each USB of preceding multichannel USB exports fixed current, can not adapt to respective access device, while also solving each USB
The problem of excessively high possibility of interfaces temperature damages circuit.
One kind described in the utility model can overheat protector electric current self application multichannel USB output circuit, including 5V export mould
Block, multiple USB link blocks, USB output control module, the USB control circuit module include USB monitoring unit, are received
The USB voltage monitoring signal that USB link block issues generates USB current monitor signal, USB current monitor signal is sent to
Master control processing unit receives the control signal of master control processing unit sending, and control USB voltage monitoring signal is to control USB company
The output of connection module；
Temperature monitoring unit monitors the temperature of USB link block and USB detection unit, and the temperature information of monitoring is sent
To master control processing unit；
Master control processing unit receives the temperature information of temperature monitoring unit transmission, receives the USB of USB detection unit transmission
Current monitor signal issues the USB output of control signal to USB monitoring unit control USB link block.
One kind described in the utility model can overheat protector electric current self application multichannel USB output circuit, by be arranged it is more
A USB link block is realized multichannel USB output, and can be controlled by each USB link block to each USB interface
System.USB monitoring unit is arranged in the utility model, detects the voltage condition of each USB link block, obtains USB current conditions,
Master control processing unit analyzes USB current conditions, determines whether the current output electric current of the USB interface is suitable, if improper
The electric current that control signal controls USB output by USB monitoring unit is issued, so that the suitable work of each USB interface output
Electric current, so that charger and consuming device solve each USB output of current multichannel USB all in optimal use state
Fixed current, the problem of respective access device can not be adapted to.The utility model is also provided with temperature monitoring unit simultaneously, the temperature
Monitoring unit monitors the temperature of USB link block and USB detection unit, and master control processing unit is monitored according to temperature monitoring unit
Information judges current USB interface, and whether temperature is excessively high in the presence of the risk for damaging circuit, and it is logical that control signal is issued if there are risk
The electric current for crossing the control USB output of USB monitoring unit reduces USB output electric current and works under over-temperature conditions to avoid USB interface,
Damage circuit.Since the electric current that the electrical appliance for the USB access having needs is excessively high, USB interface works under excessive current for a long time
Will generate heat, USB interface for a long time work under febrile state then may injury device, pass through setting temperature monitoring unit, prison
The temperature of USB link block and USB detection unit is surveyed, master control processing unit can control adjustment USB output electric current in time, realize
Overheat protector avoids equipment damage.The utility model is not also each while realizing the current automatic adaptation of multichannel USB output
USB provides overheat protector, avoids in the case where current automatic adaptation, and generating super-high-current leads to USB fever work, and damage is set
It is standby.
Detailed description of the invention
Fig. 1 be it is a kind of can overheat protector current automatic adaptation multichannel USB output circuit circuit block diagram；
Fig. 2 is the circuit block diagram of USB control circuit module；
Fig. 3 is the circuit diagram of USB monitoring unit；
Fig. 4 is the circuit diagram of 5V voltage transformation；
Fig. 5 is the circuit diagram of USB control circuit module；
Fig. 6 is the circuit diagram of USB link block；
Fig. 7 is the circuit block diagram of 5V output module；
The circuit diagram of the position Fig. 8 5V output module.
Specific embodiment
As depicted in figs. 1 and 2, it is a kind of can overheat protector electric current self application multichannel USB output circuit, including 5V export mould
Block, multiple USB link blocks, USB output control module, the USB control circuit module include USB monitoring unit, are received
The USB voltage monitoring signal that USB link block issues generates USB current monitor signal, USB current monitor signal is sent to
Master control processing unit receives the control signal of master control processing unit sending, and control USB voltage monitoring signal is to control USB company
The output of connection module；Temperature monitoring unit monitors the temperature of USB link block and USB detection unit, by the temperature information of monitoring
It is sent to master control processing unit；Master control processing unit receives the temperature information of temperature monitoring unit transmission, and it is single to receive USB detection
The USB current monitor signal that member is sent issues the USB output of control signal to USB monitoring unit control USB link block.USB
Monitoring unit detects the voltage condition of each USB link block, obtains USB current conditions, and master control processing unit analyzes USB electricity
Situation is flowed, determines whether the current output electric current of the USB interface is suitable, control signal is issued if improper and is supervised by USB
Survey the electric current of unit control USB output.Temperature monitoring unit monitors the temperature of USB link block and USB detection unit, at master control
Reason unit according to the information that temperature monitoring unit monitor judge current USB interface whether temperature it is excessively high exist damage circuit wind
Danger, issued if there are risk control signal by USB monitoring unit control USB output electric current, reduce USB output electric current with
It avoids USB interface from working under over-temperature conditions, damages circuit.
As shown in figure 3, the USB monitoring unit includes capacitor, resistance and field-effect tube；The connection of field-effect tube Q1 grid
One end of first resistor R1 and the control receiving end signal G1, the other end of first resistor R1 are connect with second source VCC2, are controlled
The receiving end signal G1 connects one end of second resistance R2, and the second resistance R2 other end connects field respective tube Q1 source electrode, field-effect tube
Q1 source electrode connects one end of 3rd resistor R3, the 4th resistance R4 and the 5th resistance R5, the other end and USB electric current of 3rd resistor R3
The connection of monitoring signal CS1 transmitting terminal, USB current monitor signal CS1 transmitting terminal connect the one end first capacitor C1, and first capacitor C1 is another
The other end ground connection of one end ground connection, the 4th resistance R4 and the 5th resistance R5, field-effect tube Q1 drain electrode connection USB voltage monitoring signal
The receiving end V-1.Receive USB voltage monitoring signal V-1 and generate USB current monitor signal CS1, USB current monitor signal CS1 is sent out
It send to master control processing unit, main control unit judges the output electricity of the USB interface according to the USB current monitor signal CS1 received
Whether stream needs to adjust, and such as needs to adjust side output control signal G1, control signal G1 and controls USB voltage monitoring signal V-1
Change, the change of USB voltage monitoring signal V-1 is to influence the electric current that USB interface exports.
As shown in figure 4, the 5V voltage that the second source is exported by 5V output module is obtained by transformation.5V voltage output
The input terminal of end connection DC/DC direct current conversion chip, output end are second source VCC2, the 5V input terminal by being converted to
Pass through a capacitor respectively with second source output end to be grounded together with chip ground pin.
As shown in figure 5, the temperature detecting unit is temperature sensor, the master control processing unit is MCU chip.At this
In embodiment, by taking four road USB output as an example, the P13-P16 of MCU chip is the 4 road input ports A/D, is mainly used for output end oral area
The input for dividing temperature detection, connect with temperature sensor, and the G1-G4 of MCU chip is the modulation output control of 4 tunnel PWM modes
Port processed is connect with the receiving end control signal G1-G4 of USB monitoring unit, and the CS1-CS4 of MCU chip is 4 tunnels of output port
Current detecting port is connect with the USB current monitor signal CS1 transmitting terminal of USB monitoring unit, and MCU is by surveying current limliting detection
Resistance（R3-R5 etc.）On pressure drop calculate the output size of current of each port, MCU is real by temperature sensor 1-4
When dynamically detect the temperature of Q1, Q2, Q3, Q4 and USB1, USB2, USB3, USB4, when output port portion temperature is excessively high
When, then the size of output electric current is modulated with PWM mode by G1, G2, G3, G4, it is ensured that each USB port works
Under ideal safe condition.
As shown in fig. 6, the USB link block includes data processing chip, USB interface, capacitor and resistance；USB interface
In positive pole connect with 5V output module output end, the data anode and data cathode in USB interface and data processing core
The corresponding pin of piece connects, and 5V output module output end is connected by the power pins of resistance and data processing chip, USB interface
In power cathode connect with USB voltage monitoring signal output end.Data processing chip U1 used in the present embodiment can be same
When handle two USB interfaces, therefore the data anode D+ and data cathode D- of the first USB interface USB1 with U1 pairs of data processing chip
The connection of first group of data pin i.e. 1pin and 6pin, the data anode D+ and data cathode of secondary USB interface USB2 answered
D- second group of data pin connection corresponding with data processing chip U1 is 3pin and 4pin.5V output module output end is logical
It crosses resistance R21 to connect with the power pins of data processing chip U1 i.e. 5pin foot, the power pins of data processing chip U1 are
5pin foot is grounded by capacitor C5, and the grounding pin i.e. 2pin foot for handling chip U1 is grounded.
As shown in fig. 7, the 5V output module includes AC input unit, alternating current is connected, rectifying and wave-filtering is carried out to alternating current,
Smooth DC voltage is converted by the alternating voltage that route inputs, provides electric energy for late-class circuit；Switch change-over unit receives
The electric energy of AC input unit, the opening and closing of control switch pipe make transformer secondary output winding generate piezoelectric voltage；Secondary output unit, transformer
Secondary windings generates voltage into generation 5V voltage output after over commutation filtering.The module uses alternating current, by the alternating current 220V of alternating current
By rectifying and wave-filtering transformation and etc. obtain the 5V voltage of direct current, for late-class circuit power.The specific embodiment of the module can
AC access unit is formed by common mode inductance and rectifier bridge etc., alternating current is converted to smooth direct current, passes through driving chip
TW1699B and transformer generate 5V voltage, as shown in Figure 8.
Claims (7)
1. one kind can overheat protector electric current self application multichannel USB output circuit, including 5V output module, multiple USB connection moulds
Block, USB output control module, which is characterized in that USB control circuit module includes that USB monitoring unit receives USB link block
The USB voltage monitoring signal of sending generates USB current monitor signal, and it is single that USB current monitor signal is sent to master control processing
Member receives the control signal of master control processing unit sending, and control USB voltage monitoring signal is to control the defeated of USB link block
Out；
Temperature monitoring unit monitors the temperature of USB link block and USB detection unit, the temperature information of monitoring is sent to master
Control processing unit；
Master control processing unit receives the temperature information of temperature monitoring unit transmission, receives the USB electric current of USB detection unit transmission
Monitoring signal issues the USB output of control signal to USB monitoring unit control USB link block.
2. one kind according to claim 1 can overheat protector electric current self application multichannel USB output circuit, feature exists
In the USB monitoring unit includes capacitor, resistance and field-effect tube；Fet gate connects one end and the control of first resistor
The other end of signal receiving end processed, first resistor is connect with second source, one end of control signal receiving end connection second resistance,
The second resistance other end connects field respective tube source electrode, and field-effect tube source electrode connects 3rd resistor, the 4th resistance and the 5th resistance
The other end of one end, 3rd resistor is connect with USB current monitor signal transmitting terminal, USB current monitor signal transmitting terminal connection the
The other end ground connection of one capacitor one end, first capacitor other end ground connection, the 4th resistance and the 5th resistance, FET drain connection
USB voltage monitoring signal receiving end.
3. one kind according to claim 2 can overheat protector electric current self application multichannel USB output circuit, feature exists
In the 5V voltage that the second source is exported by 5V output module is obtained by transformation.
4. one kind according to claim 1 can overheat protector electric current self application multichannel USB output circuit, feature exists
In the temperature monitoring unit is temperature sensor.
5. one kind according to claim 1 can overheat protector electric current self application multichannel USB output circuit, feature exists
In the master control processing unit is MCU chip.
6. one kind according to claim 1-5 can overheat protector electric current self application multichannel USB output circuit,
It is characterized in that, the USB link block includes data processing chip, USB interface, capacitor and resistance；Power supply in USB interface is just
Pole is connect with 5V output module output end, and the data anode and data cathode in USB interface draw with the corresponding of data processing chip
Foot connection, 5V output module output end are connected by the power pins of resistance and data processing chip, and the power supply in USB interface is negative
Pole is connect with USB voltage monitoring signal output end.
7. one kind according to claim 1-5 can overheat protector electric current self application multichannel USB output circuit,
It being characterized in that, the 5V output module includes,
AC input unit connects alternating current, carries out rectifying and wave-filtering to alternating current, converts the alternating voltage that route inputs to smooth straight
Galvanic electricity pressure provides electric energy for late-class circuit；
Switch change-over unit, receives the electric energy of AC input unit, and the opening and closing of control switch pipe makes transformer secondary output winding generate electricity electricity
Pressure；
Secondary output unit, transformer secondary output winding generate voltage into generation 5V voltage output after over commutation filtering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721861766.4U CN208172786U (en) | 2017-12-27 | 2017-12-27 | It is a kind of can overheat protector electric current self application multichannel USB output circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721861766.4U CN208172786U (en) | 2017-12-27 | 2017-12-27 | It is a kind of can overheat protector electric current self application multichannel USB output circuit |
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| CN208172786U true CN208172786U (en) | 2018-11-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114243639A (en) * | 2021-12-10 | 2022-03-25 | 中国电子科技集团公司第二十九研究所 | Method and system for realizing over-temperature automatic protection by separating main power supply from auxiliary power supply |
-
2017
- 2017-12-27 CN CN201721861766.4U patent/CN208172786U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114243639A (en) * | 2021-12-10 | 2022-03-25 | 中国电子科技集团公司第二十九研究所 | Method and system for realizing over-temperature automatic protection by separating main power supply from auxiliary power supply |
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