CN207994925U - The USB power supply circuits and electronic equipment to supply power with double circuit - Google Patents
The USB power supply circuits and electronic equipment to supply power with double circuit Download PDFInfo
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- CN207994925U CN207994925U CN201820269697.6U CN201820269697U CN207994925U CN 207994925 U CN207994925 U CN 207994925U CN 201820269697 U CN201820269697 U CN 201820269697U CN 207994925 U CN207994925 U CN 207994925U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The utility model discloses a kind of USB power supply circuits and electronic equipment to supply power with double circuit, the circuit includes comparison control circuit, power switching circuit, power-switching circuit, the power input for accessing the power supply and the power output end for exporting supply voltage, wherein, power-switching circuit is used to after the supply voltage of power supply is converted into supply voltage export to power output end；Comparison control circuit is used for the control power switching circuit shutdown when the supply voltage for detecting power supply is greater than or equal to reference voltage, and when the supply voltage for detecting power supply is less than reference voltage, control power switching circuit is opened；The supply voltage that power switching circuit is used for when opening by standby power input is exported to power output end.It also can be that portable electronic product charges that the utility model, which realizes electronic equipment in the standby state, solve the problem of the case where portable electronic product is charged by electronic equipment is few, causes waste largely.
Description
Technical field
The utility model is related to electronic circuit technology field, more particularly to a kind of USB power supply circuits and electricity to supply power with double circuit
Sub- equipment.
Background technology
Most of portable electronic products such as present mobile phone, Baffle Box of Bluetooth, tablet computer (iPad) are carried out by USB
Charging, so that product electronic equipment such as computer, TV of more and more straight power supply inserting work requires to support mostly
USB chargings are carried out to external equipment.Present electronic equipment is generally used as using system power supply SYS_VCC to be produced to portable electronic
The power supply of product power supply.Electric current of the portable electronic product in charging is larger (iPad requires 2.4A), this will necessarily increase electronics
The work load of the system power supply of equipment so that system power supply also accordingly accomplishes to support high current design.
But portable electronic product the case where being charged by electronic equipment, is few, thus causes largely
Waste.In addition, portable electronic product also requires also carry out portable electronic product under electronic equipment standby mode
Charging, and current electronic equipment cannot achieve the function.
Utility model content
The main purpose of the utility model is to propose a kind of USB power supply circuits and electronic equipment to supply power with double circuit, it is intended to real
Existing electronic equipment also can be that portable electronic product charges in the standby state, solve system power supply and accomplish to support high current
Design, the case where portable electronic product is charged by electronic equipment, are few, the problem of causing waste largely.
To achieve the above object, the utility model proposes a kind of USB power supply circuits to supply power with double circuit, it is applied to that there is power supply
In the electronic equipment of power supply and standby power, the USB power supply circuits to supply power with double circuit include comparison control circuit, power switching
Circuit, power-switching circuit, the power input for accessing the power supply and the power supply for exporting supply voltage are defeated
Outlet, the power input input with the power detecting end and the power-switching circuit of the comparison control circuit respectively
End connection, the control terminal of the comparison control circuit are connect with the controlled end of the power switching circuit；The power switching electricity
The input terminal on road is connect with the standby power, the output of the output end and the power-switching circuit of the power switching circuit
End is connect with the power output end respectively；Wherein,
The power-switching circuit, for being exported after the supply voltage of the power supply is converted into the supply voltage
To the power output end；
The comparison control circuit, for being greater than or equal to reference voltage in the supply voltage for detecting the power supply
When, control the power switching circuit shutdown, when the supply voltage for detecting the power supply is less than reference voltage, control
The power switching circuit is opened；
The power switching circuit, for open when, by the supply voltage that the standby power inputs export to
The power output end.
Preferably, the comparison control circuit includes detection comparing unit and switch control unit, and the detection is more single
The input terminal of member is the test side of the comparison control circuit, and the output end of the detection comparing unit and switch control are single
The output end of member is connect with the controlled end of the switch control unit；The output end of the switch control unit is the relatively control
The controlled end of circuit processed.
Preferably, the detection comparing unit includes zener diode, first resistor, second resistance, 3rd resistor and
One electronic switch, the cathode of the zener diode are the input terminal of the detection comparing unit, the sun of the zener diode
The first end of pole and the first resistor and the first end of the second resistance interconnect, the second end of the first resistor with it is described
The controlled end of the first end of 3rd resistor and first electronic switch interconnects；The second end of the second resistance, the third
The input terminal of the second end of resistance and first electronic switch is grounded；The output end of first electronic switch is the inspection
Survey the output end of comparing unit.
Preferably, the switch control unit includes the first capacitance, the 4th resistance, the 5th resistance, the 6th resistance and second
Electronic switch, the controlled end of second electronic switch are the controlled end of the switch control unit, and with the 4th resistance
First end connection, the input end grounding of second electronic switch, the output end of second electronic switch is the switch
The output end of control unit, and with the first end of the 5th resistance, the first end of the 6th resistance and first capacitance
First end interconnection；The second end of 4th resistance is connect with the second end of the 5th resistance and the standby power；Institute
The second end for stating the 6th resistance is connect with the second end of the first resistor；The second end of first capacitance is grounded.
Preferably, the power switching circuit includes third electronic switch, the second capacitance and third capacitance, the third electricity
The controlled end of sub switch is the controlled end of the power switching circuit, and the input terminal of the third electronic switch is described for cutting
Change the input terminal of circuit, the output end of the third electronic switch is the output end of the power switching circuit, and with described the
The first end of two capacitances and the interconnection of the first end of the third capacitance；The second end of second capacitance and the third capacitance
Second end is grounded.
Preferably, the power-switching circuit includes decompression chip, the 4th capacitance, the 5th capacitance, the 6th capacitance, the 7th electricity
Appearance, the 8th capacitance, the 9th capacitance, the 7th resistance, the 8th resistance, the 9th resistance, voltage feedback unit and filter unit, the drop
Press chip input terminal be the power-switching circuit input terminal, and with the first end of the 4th capacitance, it is described 5th electricity
The first end of appearance, the first end of the 7th resistance, the interconnection of the first end of the 9th resistance, the output end of the decompression chip
It is interconnected with the first end of the input terminal of the filter unit and the 9th capacitance, the Enable Pin of the decompression chip and described the
The first end of the second end of seven resistance, the first end of the 6th capacitance and the 8th resistance interconnects；4th capacitance
Second end, the second end of the 8th resistance, the second end of the 5th capacitance and the second end of the 6th capacitance are grounded；
The second end of 9th resistance is connect with the first end of the clock signal input terminal of the decompression chip and the 7th capacitance；
The second end and the first end of the 8th capacitance of 7th capacitance are grounded, second end and the drop of the 8th capacitance
Press the power end connection of chip；The output end of the filter unit be the power-switching circuit output end, and with the electricity
The test side connection of feedback unit, the output end of the voltage feedback unit and the signal feedback end of the decompression chip is pressed to connect
It connects, the second end of the 9th capacitance is connect with the bootstrapping end of the decompression chip.
Preferably, the filter unit includes the tenth capacitance, the 11st capacitance and the first inductance, and the of first inductance
One end be the filter unit input terminal, the second end of first inductance with for the filter unit output end, and with
The first end of tenth capacitance and one end interconnection of the 11st capacitance；The second end and the described tenth of tenth capacitance
The second end of one capacitance is grounded.
Preferably, the voltage feedback unit includes the tenth resistance, eleventh resistor and the 11st capacitance, the tenth electricity
The first end of resistance is the test side of the voltage feedback unit, and the second end of the tenth resistance connects through the eleventh resistor
The common end of ground, the tenth resistance and the eleventh resistor be the voltage feedback unit output end, the described 11st
Capacitance is arranged in parallel in the both ends of the tenth resistance.
The utility model also proposes a kind of electronic equipment, including USB interface, power supply, standby power and as described above
The USB power supply circuits to supply power with double circuit；
The power input of the USB power supply circuits to supply power with double circuit is connect with the power supply, described to supply power with double circuit
The power output ends of USB power supply circuits connect with the USB interface, the USB power supply circuits to supply power with double circuit for cutting
Circuit is changed to connect with the standby power.
Preferably, the electronic equipment further includes master controller, the control terminal of the master controller and the power supply
Connection, the master controller are used for when receiving the starting-up signal of the electronic equipment, control the power supply work,
When receiving the standby signal of the electronic equipment, controls the power supply and be stopped.
The USB power supply circuits that the utility model supplies power with double circuit pass through power input by the way that power-switching circuit is arranged
It connect with power supply, with when power supply works normally, the supply voltage of power supply is converted into defeated after supply voltage
Go out to power output end to be powered by USB interface for portable electronic product.Or power supply is when being stopped,
Stop power supply conversion and output.The utility model is also by being arranged comparison control circuit, in the power supply for detecting power supply
When voltage is greater than or equal to reference voltage, control power switching circuit shutdown stops output power supply electricity to control standby power
Pressure, or when the supply voltage for detecting power supply is less than reference voltage, and the unlatching of power switching circuit is controlled, with control
Standby power is through power switching circuit output supply voltage to power output end, to be connect by USB for portable electronic product
Mouth is powered.It is arranged such so that when electronic equipment works normally, power supply is portable by transversion conversion circuit
Electronic product provides supply voltage, and when electronic equipment is in standby, standby power drives by comparing control circuit and supplies
Electrical switching circuit works, and confession is provided for portable electronic product to be powered by USB interface for portable electronic product
Piezoelectric voltage realizes the doubleway output of power supply circuit.It also can be portable that the utility model, which realizes electronic equipment in the standby state,
Formula electronic product charges, and solves system power supply and accomplishes that high current design, portable electronic product is supported to set by electronics
The case where standby charging, is few, the problem of causing waste largely.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the high-level schematic functional block diagram for one embodiment of USB power supply circuits that the utility model supplies power with double circuit；
Fig. 2 is the electrical block diagram of comparison control circuit in the USB power supply circuits that Fig. 1 supplies power with double circuit；
Fig. 3 is the electrical block diagram of power switching circuit in the USB power supply circuits that Fig. 1 supplies power with double circuit；
Fig. 4 is the electrical block diagram of power-switching circuit in the USB power supply circuits that Fig. 1 supplies power with double circuit；
Fig. 5 is the function module that the USB power supply circuits that the utility model supplies power with double circuit are applied to one embodiment of electronic equipment
Schematic diagram.
Drawing reference numeral explanation：
| Label | Title | Label | Title |
| 100 | The USB power supply circuits to supply power with double circuit | U1 | It is depressured chip |
| 10 | Comparison control circuit | L1 | First inductance |
| 11 | Detect comparing unit | R1~R11 | First resistor~eleventh resistor |
| 12 | Switch control unit | C1~C13 | First capacitance~thirteenth resistor |
| 20 | Power switching circuit | Q1 | First electronic switch |
| 30 | Power-switching circuit | Q2 | Second electronic switch |
| 31 | Voltage feedback unit | Q3 | Third electronic switch |
| 32 | Filter unit | MCU | Master controller |
| Vin | Power input | J1 | USB interface |
| Vout | Power output end | VCC1 | Standby power |
| ZD1 | Zener diode | VCC2 | Power supply |
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, shall fall within the protection scope of the present invention.
If it is to be appreciated that related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding,
Afterwards ...), then directionality instruction be only used for explain it is opposite between each component under a certain particular pose (as shown in the picture)
Position relationship, motion conditions etc., if the particular pose changes, directionality instruction also correspondingly changes correspondingly.
If, should " first ", " the in addition, relate to the description of " first ", " second " etc. in the utility model embodiment
Two " etc. description is used for description purposes only, and is not understood to indicate or imply its relative importance or is implicitly indicated meaning
The quantity of the technical characteristic shown." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one
A this feature.In addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill
Personnel can be implemented as basis, will be understood that this technical side when the combination of technical solution appearance is conflicting or cannot achieve
The combination of case is not present, also not within the protection domain of the requires of the utility model.
The utility model proposes a kind of USB power supply circuits to supply power with double circuit, it is applied to that there is power supply and standby power
Electronic equipment in.
The electronic equipment, which can be computer, TV, laptop etc., has USB interface, and supports USB interface power supply
Electronic equipment, to be powered by USB for portable electronic products such as mobile phone, Baffle Box of Bluetooth, tablet computers (iPad).It is existing
The power supply powered to portable electronic product is generally used as using system power supply SYS-VCC in electronic equipment.Portable electronic
Electric current of the product in charging is larger (iPad require 2.4A), and being equally also required to system power supply, also to provide bigger electric current defeated
Go out, this necessarily increases the work load of the system power supply of electronic equipment so that system power supply also accordingly accomplishes that high current is supported to set
Meter so that the electric current of system power supply is up to 5A.
Also, the case where portable electronic product is charged by electronic equipment is few, thus causes largely
Waste.In addition, portable electronic product also requires also carry out portable electronic product under electronic equipment standby mode
Charging, and current electronic equipment cannot achieve the function.
Referring to figs. 1 to Fig. 4, in one embodiment of the utility model, the USB power supply circuits 100 to supply power with double circuit include than
Compared with control circuit 10, power switching circuit 20, power-switching circuit 30, the power input for accessing the power supply VCC2
Vin and power output end Vout, the power input Vin for exporting supply voltage is held to be controlled compared with described respectively
The power detecting end of circuit 10 is connected with the input terminal of the power-switching circuit 30, the control terminal of the comparison control circuit 10
SW is connect with the controlled end of the power switching circuit 20；The input terminal of the power switching circuit 20 and the standby power
VCC1 connections, the output end of the power switching circuit 20 and the output end of the power-switching circuit 30 respectively with the power supply
Output end vo ut connections；Wherein,
The power-switching circuit 30, for the supply voltage of the power supply VCC2 to be converted into the supply voltage
After export to the power output end Vout；
The comparison control circuit 10, for being greater than or equal to ginseng in the supply voltage for detecting the power supply VCC2
It when examining voltage, controls the power switching circuit 20 and turns off, be less than ginseng in the supply voltage for detecting the power supply VCC2
When examining voltage, controls the power switching circuit 20 and open；
The power switching circuit 20, the supply voltage for when opening, the standby power VCC1 to be inputted
It exports to the power output end Vout.
It is understood that power supply VCC2 can be the DC power supply of 12V/24V/36V, the power supply electricity of the present embodiment
Source VCC2 is preferably the power supply output of 12V.Power supply VCC2 is the device in electronic equipment when electronic equipment works normally
Part, circuit provide operating voltage, and when electronic equipment is in standby, and stop power supply output.Standby standby power VCC1
The voltage of preferably system power supply, system power supply is generally 5V, and system power supply can be electronic equipment in electronic device works
System provides operating voltage.Or when electronic equipment is standby, standby voltage is provided for the system of electronic equipment.
In the present embodiment, power-switching circuit 30 is preferably DC-DC conversion circuits, and DC-DC conversion circuits are through power input
End Vin is connect with power supply VCC2, and when power supply VCC2 works, by the electricity of the power supply VCC2 12V exported
The supply voltage that source voltage is converted into 5V is exported to the USB interface J1 being connect with power output end Vout, with for mobile phone, bluetooth sound
The portable electronic products such as case, tablet computer (iPad) are powered by USB.Or it is stopped in power supply VCC2
When, stop power supply conversion and output.
In the present embodiment, the reference voltage of comparison control circuit 10 can be according to the supply voltage of power supply VCC2 outputs
It is set, such as when the out-put supply of power supply VCC2 is 12V, reference voltage could be provided as 9~10V, preferably
9.6V.Certainly in other embodiments, the out-put supply of power supply VCC2 is other voltage values, then will refer to electricity accordingly
Pressure is arranged to corresponding voltage value, is not limited herein.When comparison control circuit 10 detects that power supply VCC2's is defeated
When going out 9.6V of the voltage more than or equal to reference point voltage, it is determined that power supply VCC2 normal works, and control power switching
Circuit 20 turns off, and stops output supply voltage to control standby power VCC1.When comparison control circuit 10 detects power supply
When the output voltage of VCC2 is less than the 9.6V of reference point voltage, it is determined that power supply VCC2 normal works, and control for cutting
The unlatching of circuit 20 is changed, to control supply voltages of the standby power VCC1 through the output of power switching circuit 20 5V to power output end
Vout, to be powered by USB interface J1 for portable electronic products such as mobile phone, Baffle Box of Bluetooth, tablet computers (iPad).
The utility model connects by the way that power-switching circuit 30 is arranged, and by power input Vin and power supply VCC2
Connect, with when power supply VCC2 is worked normally, by the supply voltage of power supply VCC2 be converted into exporting after supply voltage to
Power output end Vout for portable electronic product by USB interface J1 to be powered.Or power supply VCC2 stops
When work, stop power supply conversion and output.The utility model is also by being arranged comparison control circuit 10, to detect power supply electricity
When the supply voltage of source VCC2 is greater than or equal to reference voltage, control power switching circuit 20 turns off, to control standby power
VCC1 stops output supply voltage, or when the supply voltage for detecting power supply VCC2 is less than reference voltage, and controls
Power switching circuit 20 is opened, and supply voltage is exported to power output end through power switching circuit 20 to control standby power VCC1
Vout, to be powered by USB interface J1 for portable electronic product.It is arranged such so that in the normal work of electronic equipment
When making, power supply VCC2 provides supply voltage by transversion conversion circuit for portable electronic product, is in electronic equipment
When standby mode, standby power VCC1 drives power switching circuit 20 to work by comparing control circuit 10, to be portable
Electronic product is powered by USB interface J1 and provides supply voltage for portable electronic product, realizes the two-way of power supply circuit
Output.It also can be that portable electronic product charges that the utility model, which realizes electronic equipment in the standby state, solve
The case where system power supply accomplishes support high current design, and portable electronic product is charged by electronic equipment is few, causes very big
The problem of waste in degree.
Referring to figs. 1 to Fig. 4, in a preferred embodiment, the comparison control circuit 10 include detection comparing unit 11 and
The input terminal of switch control unit 12, the detection comparing unit 11 is the test side of the comparison control circuit 10, the inspection
Survey the controlled end of the output end of comparing unit 11 and the output end and the switch control unit 12 of the switch control unit 12
Connection；The output end of the switch control unit 12 is the controlled end SW of the comparison control circuit 10.
In the present embodiment, detection comparing unit 11 is used to detect that the supply voltage of power supply VCC2 is greater than or equal to
When reference voltage, trigger switch control unit 12 exports the control signal of high level to power switching circuit 20, to control power supply
Switching circuit 20 turns off, and stops output supply voltage to control standby power VCC1.Or detecting power supply VCC2
Supply voltage be less than reference voltage when, trigger switch control unit 12 exports low level control signal to power switching circuit
20, to control the unlatching of power switching circuit 20, and controls standby power VCC1 and export supply voltage extremely through power switching circuit 20
Power output end Vout, to be powered by USB interface J1 for portable electronic product.
Referring to figs. 1 to Fig. 4, further, in above-described embodiment, the detection comparing unit 11 includes zener diode
ZD1, first resistor R1, second resistance R2,3rd resistor R3 and the first electronic switch Q1, the cathode of the zener diode ZD1
For the input terminal of the detection comparing unit 11, the first end of the anode of the zener diode ZD1 and the first resistor R1
And the first end interconnection of the second resistance R2, the first end of the second end of the first resistor R1 and the 3rd resistor R3 and
The controlled end of the first electronic switch Q1 interconnects；The second end of the second end of the second resistance R2, the 3rd resistor R3
And the input terminal of the first electronic switch Q1 is grounded；The output end of the first electronic switch Q1 is that the detection is more single
The output end of member 11.
In the present embodiment, the turn-on power of zener diode ZD1 is preferably 7.5V, namely when the electricity of power supply VCC2
When pressure rises to 7.5V, zener diode ZD1 can be connected.It is understood that the resistance value of second resistance R2 is much larger than voltage stabilizing
The electric current of dynamic internal resistance value namely power supply VCC2 outputs when diode ZD1 conductings is equivalent to completely through first resistor R1
Outflow.First electronic switch Q1 is preferably NPN type triode, and certainly in other embodiments, the first electronic switch Q1 can be with
It is realized using electronic switches such as MOS pipes, IGBT, is not limited herein.The conducting voltage Vb of first electronic switch Q1 is
0.7V or so.0.014mA can be calculated to obtain by flowing through the electric current of 3rd resistor R3, then the voltage at the both ends first resistor R1 is 1.4V.Cause
This to sum up can be calculated, and the voltage of power supply VCC2 rises to 0.7V+1.4V+7.5V, that is, when 9.6V, the first electronics
Switch Q1 conductings can be connected.Also the voltage value of reference voltage be may be configured as into 9.6V.
When power supply VCC2 rise above or equal to reference voltage 9.6V when, NPN type triode Q1 conducting, and
Low level trigger signal is exported to switch control unit 12.
When power supply VCC2 deteriorates to less than the 9.6V of reference voltage, NPN type triode Q1 cut-offs, the 5th is electric at this time
Resistance R5 exports the trigger signal of the high level of the 5V voltages of standby power VCC1 to switch control unit 12.
Referring to figs. 1 to Fig. 4, further, in above-described embodiment, the switch control unit 12 include the first capacitance C1,
The controlled end of 4th resistance R4, the 5th resistance R5, the 6th resistance R6 and the second electronic switch Q2, the second electronic switch Q2 is
The controlled end of the switch control unit 12, and connect with the first end of the 4th resistance R4, the second electronic switch Q2
Input end grounding, the output end of the second electronic switch Q2 is the output end of the switch control unit 12, and with it is described
The first end of 5th resistance R5, the first end of the 6th resistance R6, the interconnection of the first end of the first capacitance C1；Described
The second end of four resistance R4 is connect with the second end of the 5th resistance R5 and the standby power VCC1；6th resistance
The second end of R6 is connect with the second end of the first resistor R1；The second end of the first capacitance C1 is grounded.
In the present embodiment, the second electronic switch Q2 is preferably NPN type triode, certainly in other embodiments, the second electricity
Sub switch Q2 can also be realized using electronic switches such as metal-oxide-semiconductor, IGBT, be not limited herein.
Second electronic switch Q2 is connected when receiving detection comparing unit 11 and exporting the trigger signal of high level, and exports
Low level control signal is to power switching circuit 20, to control the unlatching of power switching circuit 20, to control standby power
VCC1 exports supply voltage to power output end Vout through power switching circuit 20, and then passes through USB for portable electronic product
Interface J1 is powered.And end when receiving detection comparing unit 11 and exporting low level trigger signal, the 6th is electric at this time
Resistance R6 exports the control signal of standby power VCC15V high level to power switching circuit 20, to control power switching circuit
20 shutdowns stop output supply voltage to control standby power VCC1.
First capacitance C1 and the 6th resistance R6 forms delay circuit, the first capacitance C1 in the second electronic switch Q2 shutdowns,
It is charged by the 6th resistance R6, in the second electronic switch Q2 shutdown moments, the first capacitance C1 is started to charge up, the first capacitance C1
It is equivalent to short circuit, the control signal of the high level at this time through the 6th resistance R6 output is dragged down by the second capacitance C2, then with the
The charging complete of one capacitance C1, the first both ends capacitance C1 are equivalent to open circuit.It is arranged such that the control signal of controllable high level
Delay output disconnects to control the delay of power switching circuit 20, until the control signal voltage value of high level reaches for cutting
Change the voltage value of the cut-off signals of circuit 20.To ensure to switch the process being in working condition by standby mode in electronic equipment
In, when power-switching circuit 30 does not have started work, power switching circuit 20 controls standby power VCC1 and maintains supply voltage
Output, until power-switching circuit 30 works normally.To avoid the problem that the interruption that charges, portable electronic product is influenced
Charging quality, and avoid damage take formula electronic product.
First capacitance C1 is discharged in the second electronic switch Q2 conductings by the second electronic switch Q2, so set,
Low level control signal output speed can be improved, quickly disconnected to control power switching circuit 20, until low level
Control signal voltage value reaches the voltage value of the Continuity signal of power switching circuit 20.To ensure in electronic equipment by work shape
During state is switched to switching state, when power-switching circuit 30 has been stopped, power switching circuit 20 controls standby
Power supply VCC1 quickly exports supply voltage.To avoid the problem that the interruption that charges, the charging of portable electronic product is influenced
Quality, and damage is avoided to take formula electronic product.
Referring to figs. 1 to Fig. 4, in a preferred embodiment, the power switching circuit 20 include third electronic switch close Q3,
Second capacitance C2 and third capacitance C3, the controlled end that the third electronic switch closes Q3 are the controlled of the power switching circuit 20
End, the input terminal that the third electronic switch closes Q3 are the input terminal of the power switching circuit 20, the third electronic switch
Close Q3 output end be the power switching circuit 20 output end, and with the first end of the second capacitance C2 and the third
The first end of capacitance C3 interconnects；The second end of the second capacitance C2 and the second end of the third capacitance C3 are grounded.
In the present embodiment, third electronic switch, which closes Q3, preferably to be realized using P-MOS pipes, certainly in other embodiments,
Third electronic switch is closed Q3 and can also be realized using electronic switches such as triode, IGBT, is not limited herein.P-MOS pipes
Source electrode is connect with motor power, and the drain electrode of P-MOS pipes is connect with power output end Vout, when the grid of P-MOS pipes receives ratio
Compared with control circuit 10 export low level control signal when open, it is defeated through power switching circuit 20 to control standby power VCC1
Go out supply voltage to power output end Vout, and then is powered by USB interface J1 for portable electronic product.And it is receiving
End when exporting the trigger signal of high level to comparison control circuit 10, stops output power supply electricity to control standby power VCC1
Pressure.It is arranged so that when power supply VCC2 is worked normally, can be set for portable electronic by power-switching circuit 30
It is standby that charging voltage is provided, and when power supply VCC2 is standby, it is provided and is filled for portable electronic device by standby power VCC1
Piezoelectric voltage realizes double loop power supply output.
Referring to figs. 1 to Fig. 4, in a preferred embodiment, the power-switching circuit 30 includes decompression chip U1, the 4th electricity
Hold C4, the 5th capacitance C5, the 6th capacitance C6, the 7th capacitance C7, the 8th capacitance C8, the 9th capacitance C9, the 7th resistance R7, the 8th
The input terminal of resistance R8, the 9th resistance R9, voltage feedback unit 31 and filter unit 32, the decompression chip U1 is the electricity
The input terminal of power-switching circuit 30, and with the first end of the 4th capacitance C4, the first end of the 5th capacitance C5, described
The first end of seven resistance R7, the interconnection of the first end of the 9th resistance R9, the output end of the decompression chip U1 and the filtering
The first end of the input terminal of unit 32 and the 9th capacitance C9 interconnect, the Enable Pin of the decompression chip U1 and the 7th electricity
Hinder the first end interconnection of the second end, the first end of the 6th capacitance C6 and the 8th resistance R8 of R7；4th capacitance
The of the second end of C4, the second end of the 8th resistance R8, the second end of the 5th capacitance C5 and the 6th capacitance C6
Two ends are grounded；Clock signal input terminal and seventh electricity of the second end of the 9th resistance R9 with the decompression chip U1
Hold the first end connection of C7；The second end and the first end of the 8th capacitance C8 of the 7th capacitance C7 is grounded, and described
The second end of eight capacitance C8 is connect with the power end of the decompression chip U1；The output end of the filter unit 32 is the power supply
The output end of conversion circuit 30, and being connect with the test side of the voltage feedback unit 31, the voltage feedback unit 31 it is defeated
Outlet is connect with the signal feedback end of the decompression chip U1, the second end of the 9th capacitance C9 and the decompression chip U1
Bootstrapping end connection.
In the present embodiment, decompression chip U1 is DC-DC conversion chips, and is preferably depressured chip U1 using SY8213 types come real
It is existing.Output current is charged in the first capacitance C1C1 by the 7th resistance R7 up to 3A, the Enable Pin of decompression chip U1, and
It in charging complete, is raised as high level to start to work, and will be passed through after the power supply VCC2 voltage step-downs to 5V of 12V
Output is to power output end Vout after filter unit 32 is filtered, to provide charging voltage for portable electronic device.7th
Resistance R7 and the 8th resistance R8 series connection partial pressures, therefore can be adjusted the output to by adjusting the 7th resistance R7 and the 8th resistance R8
The intrinsic standoff ratio of Enable Pin, to which the job initiation voltage of decompression chip U1 be arranged.
Referring to figs. 1 to Fig. 4, further, in above-described embodiment, the filter unit 32 includes the tenth capacitance C10, the tenth
The first end of one capacitance C11 and the first inductance L1, the first inductance L1 be the filter unit 32 input terminal, described first
The second end of inductance L1 with for the output end of the filter unit 32, and with the first end of the tenth capacitance C10 and described the
One end of 11 capacitance C11 interconnects；The second end of the tenth capacitance C10 and the second end of the 11st capacitance C11 connect
Ground.
In the present embodiment, the filter unit 32 of the tenth capacitance C10, the 11st capacitance C11 and the first inductance L1 compositions will drop
The supply voltage of pressure chip U1 outputs is filtered, and to filter out the high frequency spurs of supply voltage, realizes that stablizing for supply voltage is defeated
Go out.
Further, in above-described embodiment, the voltage feedback unit 31 includes the tenth resistance R10, eleventh resistor R11
And the test side that the first end of the 11st capacitance C11, the tenth resistance R10 are the voltage feedback unit 31, the described tenth
The second end of resistance R10 is grounded through the eleventh resistor R11, the public affairs of the tenth resistance R10 and the eleventh resistor R11
End is the output end of the voltage feedback unit 31 altogether, and the 11st capacitance C11 is arranged in parallel in the tenth resistance R10
Both ends.
In the present embodiment, the tenth resistance R10 and eleventh resistor R11 series connection are divided to be detected to supply voltage, and
Voltage detection signal is exported to the signal feedback end of the decompression chip U1, to ensure the stable electricity of decompression chip U1 outputs
Pressure.The voltage VOUT of decompression chip U1 output ends output can be calculated according to formula (1)：
VOUT=Vref1* (R10+R11)/R11 (1)
Wherein, Vref1 is the reference voltage level for being depressured chip U1 signal feedback ends, is traditionally arranged to be 0.6V.Pass through the tenth
The intrinsic standoff ratio of resistance R10, eleventh resistor R11 maintain 5V or so outputs with control decompression chip U1 output end voltages.
The utility model also proposes a kind of electronic equipment.
With reference to Fig. 5, which includes USB interface J1, power supply VCC2, standby power VCC1 and as described above
The USB power supply circuits 100 to supply power with double circuit；The detailed construction of the USB power supply circuits 100 to supply power with double circuit can refer to above-mentioned reality
Example is applied, details are not described herein again；It is understood that due to being used in the USB power supply circuits 100 that the utility model supplies power with double circuit
Above-mentioned USB power supply circuits 100 to supply power with double circuit, therefore, the implementation for the USB power supply circuits 100 that the utility model supplies power with double circuit
Example includes whole technical solutions of above-mentioned 100 whole embodiments of USB power supply circuits to supply power with double circuit, and the technique effect reached
Also identical, details are not described herein.
Wherein, the power input Vin and the power supply VCC2 of the USB power supply circuits 100 to supply power with double circuit connect
It connects, the power output end Vout of the USB power supply circuits 100 to supply power with double circuit is connect with the USB interface J1, and the two-way supplies
The power switching circuit 20 of the USB power supply circuits 100 of electricity is connect with the standby power VCC1.
With reference to Fig. 5, waited for by the way that the USB power supply circuits 100 to supply power with double circuit are arranged with being in electronic equipment in the present embodiment
When machine state, the USB power supply circuits 100 to supply power with double circuit control standby power VCC1 output supply voltages to USB interface J1, thus
It powers for portable electronic device, and when electronic equipment works normally, the control of USB power supply circuits 100 supplied power with double circuit supplies
Power supply VCC2 export it is converted after supply voltage to USB interface J1 so that electronic equipment is in working condition and standby
State can export supply voltage.And power supply VCC2 can be converted to power supply by the USB power supply circuits 100 to supply power with double circuit
Voltage output, to mitigate the work load of system power supply namely standby power VCC1.
Further, in above-described embodiment, the electronic equipment further includes master controller MCU, the master controller MCU's
Control terminal is connect with the power supply VCC2, and the master controller MCU is used in the booting letter for receiving the electronic equipment
Number when, control power supply VCC2 work, when receiving the standby signal of the electronic equipment, it is electric to control the power supply
Source VCC2 is stopped.
In the present embodiment, it is to be understood that the working condition or standby mode of power supply VCC2 is by main control
Device MCU controls.So set, being supplied to realize the power-switching circuit 30 in the USB power supply circuits 100 to supply power with double circuit
When power supply VCC2 is in running order, exported after the power supply VCC2 supply voltages exported are converted to supply voltage.And
When power supply VCC2 is in standby, stop power supply conversion and output.
The above is only the preferred embodiment of the present invention, and it does not limit the scope of the patent of the present invention,
Under every utility model in the utility model is conceived, equivalent structure made based on the specification and figures of the utility model
Transformation, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (10)
1. a kind of USB power supply circuits to supply power with double circuit are applied in the electronic equipment with power supply and standby power, special
Sign is that the USB power supply circuits to supply power with double circuit include comparison control circuit, power switching circuit, power-switching circuit, use
In the power input for accessing the power supply and power output end for exporting supply voltage, the power input point
It is not connect with the input terminal at the power detecting end of the comparison control circuit and the power-switching circuit, it is described relatively to control electricity
The control terminal on road is connect with the controlled end of the power switching circuit；The input terminal of the power switching circuit waits for electromechanics with described
Source connects, the output end of the power switching circuit and the output end of the power-switching circuit respectively with the power output end
Connection；Wherein,
The power-switching circuit, for being exported to institute after the supply voltage of the power supply is converted into the supply voltage
State power output end；
The comparison control circuit, for the supply voltage for detecting the power supply be greater than or equal to reference voltage when,
It controls the power switching circuit shutdown and controls institute when the supply voltage for detecting the power supply is less than reference voltage
State the unlatching of power switching circuit；
The power switching circuit, for when opening, the supply voltage that the standby power inputs to be exported to described
Power output end.
2. the USB power supply circuits to supply power with double circuit as described in claim 1, which is characterized in that the comparison control circuit includes
Comparing unit and switch control unit are detected, the input terminal of the detection comparing unit is the detection of the comparison control circuit
End, the output end of output end and the switch control unit of the detection comparing unit are controlled with the switch control unit
End connection；The output end of the switch control unit is the controlled end of the comparison control circuit.
3. the USB power supply circuits to supply power with double circuit as claimed in claim 2, which is characterized in that the detection comparing unit includes
The cathode of zener diode, first resistor, second resistance, 3rd resistor and the first electronic switch, the zener diode is institute
State the input terminal of detection comparing unit, first end and second electricity of the anode of the zener diode with the first resistor
The first end of resistance interconnects, the first end and first electronic switch of the second end of the first resistor and the 3rd resistor
Controlled end interconnects；The input of the second end of the second resistance, the second end of the 3rd resistor and first electronic switch
End is grounded；The output end of first electronic switch is the output end of the detection comparing unit.
4. the USB power supply circuits to supply power with double circuit as claimed in claim 3, which is characterized in that the switch control unit includes
The controlled end of first capacitance, the 4th resistance, the 5th resistance, the 6th resistance and the second electronic switch, second electronic switch is
The controlled end of the switch control unit, and connect with the first end of the 4th resistance, the input of second electronic switch
End ground connection, the output end of second electronic switch are the output end of the switch control unit, and with the 5th resistance
The first end of first end, the first end of the 6th resistance and first capacitance interconnects；The second end of 4th resistance with
The second end of 5th resistance and standby power connection；The of the second end of 6th resistance and the first resistor
Two ends connect；The second end of first capacitance is grounded.
5. the USB power supply circuits to supply power with double circuit as described in claim 1, which is characterized in that the power switching circuit includes
The controlled end of third electronic switch, the second capacitance and third capacitance, the third electronic switch is the power switching circuit
Controlled end, the input terminal of the third electronic switch are the input terminal of the power switching circuit, the third electronic switch
Output end is the output end of the power switching circuit, and with the first of the first end of second capacitance and the third capacitance
End interconnection；The second end of second capacitance and the second end of the third capacitance are grounded.
6. the USB power supply circuits to supply power with double circuit as described in claim 1 to 5 any one, which is characterized in that the power supply turns
It includes decompression chip, the 4th capacitance, the 5th capacitance, the 6th capacitance, the 7th capacitance, the 8th capacitance, the 9th capacitance, the 7th to change circuit
The input terminal of resistance, the 8th resistance, the 9th resistance, voltage feedback unit and filter unit, the decompression chip is the power supply
The input terminal of conversion circuit, and with the first end of the 4th capacitance, the first end of the 5th capacitance, the 7th resistance
First end, the interconnection of the first end of the 9th resistance, the input terminal of output end and the filter unit of the decompression chip and
The first end of 9th capacitance interconnects, the Enable Pin of the decompression chip and the second end of the 7th resistance, the described 6th
The first end of capacitance and the interconnection of the first end of the 8th resistance；The of the second end of 4th capacitance, the 8th resistance
The second end at two ends, the second end of the 5th capacitance and the 6th capacitance is grounded；The second end of 9th resistance with
The first end connection of the clock signal input terminal and the 7th capacitance of the decompression chip；The second end of 7th capacitance with
The first end of 8th capacitance is grounded, and the second end of the 8th capacitance is connect with the power end of the decompression chip；Institute
The output end for stating filter unit is the output end of the power-switching circuit, and is connected with the test side of the voltage feedback unit
It connecing, the output end of the voltage feedback unit is connect with the signal feedback end of the decompression chip, and the second of the 9th capacitance
The bootstrapping end with the decompression chip is held to connect.
7. the USB power supply circuits to supply power with double circuit as claimed in claim 6, which is characterized in that the filter unit includes the tenth
Capacitance, the 11st capacitance and the first inductance, the first end of first inductance are the input terminal of the filter unit, described first
The second end of inductance with for the filter unit output end, and with the first end of the tenth capacitance and the 11st capacitance
One end interconnection；The second end of tenth capacitance and the second end of the 11st capacitance are grounded.
8. the USB power supply circuits to supply power with double circuit as claimed in claim 7, which is characterized in that the voltage feedback unit includes
Tenth resistance, eleventh resistor and the 11st capacitance, the first end of the tenth resistance are the detection of the voltage feedback unit
End, the second end of the tenth resistance are grounded through the eleventh resistor, the public affairs of the tenth resistance and the eleventh resistor
End is the output end of the voltage feedback unit altogether, and the 11st capacitance is arranged in parallel in the both ends of the tenth resistance.
9. a kind of electronic equipment, which is characterized in that including USB interface, power supply, standby power and such as claim 1 to 8 times
The USB power supply circuits to supply power with double circuit described in meaning one；
The power input of the USB power supply circuits to supply power with double circuit is connect with the power supply, the USB to supply power with double circuit
The power output end of power supply circuit is connect with the USB interface, the power switching circuit of the USB power supply circuits to supply power with double circuit
It is connect with the standby power.
10. electronic equipment as claimed in claim 9, which is characterized in that the electronic equipment further includes master controller, the master
The control terminal of controller is connect with the power supply, and the master controller is used in the booting letter for receiving the electronic equipment
Number when, control power supply work, when receiving the standby signal of the electronic equipment, control the power supply and stop
Only work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820269697.6U CN207994925U (en) | 2018-02-24 | 2018-02-24 | The USB power supply circuits and electronic equipment to supply power with double circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820269697.6U CN207994925U (en) | 2018-02-24 | 2018-02-24 | The USB power supply circuits and electronic equipment to supply power with double circuit |
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| Publication Number | Publication Date |
|---|---|
| CN207994925U true CN207994925U (en) | 2018-10-19 |
Family
ID=63825813
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820269697.6U Expired - Fee Related CN207994925U (en) | 2018-02-24 | 2018-02-24 | The USB power supply circuits and electronic equipment to supply power with double circuit |
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| CN (1) | CN207994925U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781186A (en) * | 2019-02-28 | 2019-05-21 | 电子科技大学中山学院 | Low-power-consumption temperature and humidity detection system and detection method thereof |
| CN112130655A (en) * | 2020-08-28 | 2020-12-25 | 浪潮电子信息产业股份有限公司 | Power supply circuit of equipment to be refreshed and server |
| CN113608606A (en) * | 2021-07-23 | 2021-11-05 | 深圳海翼智新科技有限公司 | Interface circuit and network camera |
| CN115756133A (en) * | 2022-11-03 | 2023-03-07 | 南京微智新科技有限公司 | Output power supply circuit and electronic equipment that intelligence switches |
-
2018
- 2018-02-24 CN CN201820269697.6U patent/CN207994925U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781186A (en) * | 2019-02-28 | 2019-05-21 | 电子科技大学中山学院 | Low-power-consumption temperature and humidity detection system and detection method thereof |
| CN112130655A (en) * | 2020-08-28 | 2020-12-25 | 浪潮电子信息产业股份有限公司 | Power supply circuit of equipment to be refreshed and server |
| CN112130655B (en) * | 2020-08-28 | 2022-06-10 | 浪潮电子信息产业股份有限公司 | Power supply circuit of equipment to be refreshed and server |
| CN113608606A (en) * | 2021-07-23 | 2021-11-05 | 深圳海翼智新科技有限公司 | Interface circuit and network camera |
| CN115756133A (en) * | 2022-11-03 | 2023-03-07 | 南京微智新科技有限公司 | Output power supply circuit and electronic equipment that intelligence switches |
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