CN108832666A - A kind of detection device and power supply system of coffret - Google Patents
A kind of detection device and power supply system of coffret Download PDFInfo
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- CN108832666A CN108832666A CN201810195526.8A CN201810195526A CN108832666A CN 108832666 A CN108832666 A CN 108832666A CN 201810195526 A CN201810195526 A CN 201810195526A CN 108832666 A CN108832666 A CN 108832666A
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- 238000002955 isolation Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 8
- 230000006978 adaptation Effects 0.000 claims 1
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- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 13
- 230000032683 aging Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
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- 238000001914 filtration Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/10—Control circuit supply, e.g. means for supplying power to the control circuit
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
The present invention relates to intelligent power supply fields, and a kind of detection device of coffret is specifically arranged.The detection device includes isolated buck circuit, control circuit and detection circuit, the detection circuit includes the first test side connecting with the D+ pin of coffret or D- pin, and the second test side being connect with the cathode of coffret, the control circuit includes a signal output end, and the detection circuit is connect with isolated buck circuit and control circuit respectively；For the control circuit when the first test side is connected to the second test side, control signal output enters the first output state, conversely, control signal output enters the second output state.The invention further relates to a kind of power supply systems.The present invention must can safe and reliable, intelligently identify the connection state of to be charged, power supply unit and charger, adapter, and according to connection state, without human intervention, automatically decide whether to stop or start charger, adapter work.
Description
Technical field
The present invention relates to intelligent power supply fields, and the detection device and power supply system of a kind of coffret is specifically arranged.
Background technique
With portable electronic device, such as the increasingly increasing of mobile phone, IPAD, removable computer, personal multi-media mobile device
Length leads to the demand to charger, adapter and requires also higher and higher.On Vehicles Collected from Market, charger, adapter circuit are main
Two kinds of topological structure circuits such as (as shown in Figure 2), various countries' energy are fed back using transformer feedback (as shown in Figure 1) and optocoupler 431
Administrative standard is also higher and higher to the efficiency of both topological structures, standby requirement.
According to the standard of Energy Star six, low power charger, adapter efficiency be likely to rise dramatically, and it is standby must
100mW must be less than technically to rectify by using secondary synchronization, main control chip U6 in adjustment Fig. 1 main control chip U5 and Fig. 2
Operating mode, operating current, can meet the requirements.
Currently, for the usage experience of most users, portable device it is fully charged or without using adapter after,
Only by the disconnection of portable device and charger, adapter, charger, adapter and AC network are not disconnected,
That is charger is still working with adapter, still there is output voltage, still has at least stand-by power consumption of 100mW.
Also, long-time, non-stop run may cause the HV foot built-in power device of the main control chip U5 of Fig. 1, and
The aging of the DRAN foot built-in power device and transformer T3 of the main control chip U6 of transformer T2 and Fig. 2 and damage.Fig. 1
It works under the voltage of 300V or so with the power device built in main control chip in Fig. 2, with the standby frequency work of 300Hz-5KHz
Make, can also generate electromagnetic pollution to power grid.
In some public places, charging service is all provided free, between the substantially work not throughout the year of charger, adapter
It is disconnected.Especially there are many intelligent sockets, panel, directly by charger, adapter apparatus in socket and panel, there are also one drag it is more
The phenomenon that (i.e. main control chip band multichannel charge port exports), this is not only energy waste, electromagnetic pollution when not charging
Problem, but major safety problems.
In conclusion a kind of highly desirable circuit of invention, can with intelligent recognition portable device whether with charger, be adapted to
Device connection, with determining whether charger, adapter work according to connection, if output power.It is single from technical standpoint,
Solve the problems, such as that this is no difficulty, but be constrained to other factors to cause currently without the acceptable scheme in market, reason is such as
Under：
One, economy, the cost of increased intelligent recognition control circuit no more than charger, adapter itself at
This, it is necessary to it is lower；
Two, the volume of size, increased intelligent recognition control circuit must be significantly smaller than the volume of charger, adapter,
Otherwise user experience and power density be will affect；
Three, power consumption, the power consumption of increased intelligent recognition control circuit must an order of magnitude lower than present 100mW,
It must be in 10mW hereinafter, otherwise without in all senses；
Four, Electro Magnetic Compatibility, under no charging situation, the high-pressure section in Fig. 1 and Fig. 2 must stop working, and prevent electromagnetism
Pollution.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the above drawbacks of the prior art, a kind of coffret is provided
Detection device, solution can currently on the market charger, adapter it is standby without shutting down, generated energy waste, to power grid and
The electromagnetic interference of environment pollutes, and its because of the problems such as safety accident caused by component aging, has biggish economy and society
It can benefit.
The technical problem to be solved in the present invention is that in view of the above drawbacks of the prior art, providing a kind of power supply system, solve
Certainly can currently on the market charger, adapter it is standby without shutting down, it is generated energy waste, dry to the electromagnetism of power grid and environment
It disturbs pollution, and its because of the problems such as safety accident caused by component aging, there is biggish economic and social profit.
The technical solution adopted by the present invention to solve the technical problems is：A kind of detection device of coffret, institute are provided
Stating detection device includes isolated buck circuit, control circuit and detection circuit, and the detection circuit includes the D+ with coffret
First test side of pin or the connection of D- pin, and the second test side being connect with the cathode of coffret, the control electricity
Road includes a signal output end, and the detection circuit is connect with isolated buck circuit and control circuit respectively；The control circuit
When the first test side is connected to the second test side, control signal output enters the first output state, conversely, control signal is defeated
Outlet enters the second output state.
Wherein, preferred version is：The control circuit further includes the first triode and the first photo-coupler, and the described 1st
The base stage of pole pipe is connect with the output end of the first test side and isolated buck circuit respectively, the primary side point of first photo-coupler
Do not connect with the collector of the output end of isolated buck circuit and the first triode, secondary side respectively with signal output end and ground terminal
Connection；First triode is disconnected when the first test side is connected to the second test side, and is controlled the first photo-coupler and disconnected,
The signal output end not output signal；And first triode breaks when the first test side is connected to the second test side
Conducting when opening, and the conducting of the first photo-coupler is controlled, the signal output end ground connection.
Wherein, preferred version is：The detection device includes the second photo-coupler and the second triode, the two or three pole
The secondary side of pipe and the second photo-coupler constitutes control circuit, primary side, the first test side and the second inspection of second photo-coupler
It surveys end and constitutes detection circuit, the primary side of second photo-coupler output end with the first test side and isolated buck circuit respectively
Connection, the base stage of second triode are connect with the input terminal on the secondary side of the second photo-coupler and isolated buck circuit respectively,
Its collector is connect with signal output end, emitter ground connection；Second photo-coupler is detected in the first test side and second
It is connected when the connection of end, and controls the second triode and disconnect, the signal output end not output signal；And second optocoupler
Clutch is disconnected when the first test side is connected to the second test side, and controls the second triode ON, and the signal output end connects
Ground.
Wherein, preferred version is：The isolated buck circuit includes reduction voltage circuit and isolation circuit, the isolation circuit packet
Clock chip, third transistor and the first transformer are included, the base stage of third transistor and the ck control terminal of clock chip connect, institute
The input for stating reduction voltage circuit singly connects to power supply, the primary coil of first transformer respectively with the output end of reduction voltage circuit and
The collector of third transistor connects, output end of the secondary coil as reduction voltage circuit.
Wherein, preferred version is：First transformer is high-frequency power transformer.
Wherein, preferred version is：The reduction voltage circuit includes the 4th triode, and the base stage of the 4th triode passes through electricity
Resistance is connect with positive pole, and is grounded by zener diode, and the collector of the 4th triode is connect with positive pole, institute
The transmitting collection for stating the 4th triode is connect with the vdd of the primary coil of the first transformer and clock chip respectively, and passes through capacitor
Ground connection.
The clock chip includes saw-toothed wave generator with the first amplifier amplifier and has the second amplifier amplifier
Duty cycle adjustment and driving circuit, the same phase of the first amplifier amplifier is by resistance eutral grounding, and reverse phase is by capacitively
It connects, output end is connected with the second the same of amplifier amplifier, and reverse phase accesses pull-up resistor, and output end is controlled as ck
End.
The technical solution adopted by the present invention to solve the technical problems is：A kind of power supply system, the power supply system are provided
Including detection device and power supply circuit, the power supply circuit includes that power input, governor circuit, the second transformer and transmission connect
Mouthful, the primary coil of second transformer is connect with power input and governor circuit respectively, and secondary coil connects with transmission
The input terminal of the isolated buck circuit of mouth connection, the power input and detection device connects, and also passes through a resistance and master control
The power end of circuit connects, and the power end of the governor circuit is also connect with the signal output end of detection device；The master control electricity
Road is connect in signal output end not output signal with power input, control power supply circuit work；And the governor circuit
It is grounded in signal output end ground connection, stops power supply circuit work.
Wherein, preferred version is：The power supply circuit is charging circuit or adapter circuit.
Wherein, preferred version is：The power supply system includes multiple coffrets, the first test side of the detection device
Connect respectively with the D+ pin of each coffret or D- pin, the second test side of the detection device respectively with each coffret
Cathode connection.
The beneficial effects of the present invention are, compared with prior art, the present invention can it is safe and reliable, intelligence must identify to
Charging, power supply unit and charger, adapter connection state without human intervention, automatically determine and be and according to connection state
No stopping or starting charger, adapter work, advantage with high security, low in energy consumption, small in size, at low cost；Solution can
Charger, adapter are standby without shutting down currently on the market, generated energy waste, the electromagnetic interference dirt to power grid and environment
Dye, and its because of the problems such as safety accident caused by component aging, there is biggish economic and social profit.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing：
Fig. 1 is circuit diagram of the prior art using the power supply circuit of transformer feedback；
Fig. 2 is the circuit diagram for the power supply circuit that the prior art is fed back using optocoupler 431；
Fig. 3 is the structural block diagram of detection device of the present invention；
Fig. 4 is the structural block diagram of the detection device the present invention is based on isolated buck circuit；
Fig. 5 is the circuit diagram one of detection device of the present invention；
Fig. 6 is the circuit diagram two of detection device of the present invention；
Fig. 7 is the circuit diagram of clock chip of the present invention；
Fig. 8 is the structural block diagram of power supply system of the present invention；
Fig. 9 is the structural block diagram of power supply circuit of the present invention；
Figure 10 is the circuit diagram one of power supply system of the present invention；
Figure 11 is the circuit diagram two of power supply system of the present invention；
Figure 12 is the circuit diagram one the present invention is based on the power supply system of multiple coffrets；
Figure 13 is the circuit diagram two the present invention is based on the power supply system of multiple coffrets.
Specific embodiment
Now in conjunction with attached drawing, elaborate to presently preferred embodiments of the present invention.
As shown in Figure 3 and Figure 4, the present invention provides a kind of preferred embodiment of the detection device of coffret.
A kind of detection device of coffret 20, the detection device include isolated buck circuit 11,13 and of control circuit
Detection circuit 12, the detection circuit 12 include the first test side 121 connecting with the D+ pin of coffret 20 or D- pin,
And the second test side 122 connecting with the cathode of coffret 20, the control circuit 13 include a signal output end 131,
The detection circuit 12 is connect with isolated buck circuit 11 and control circuit 13 respectively；The control circuit 13 is in the first test side
121 with the second test side 122 when being connected to, and control signal output 131 enters the first output state, conversely, control signal output
End 131 enters the second output state.
It is specifically described as follows：
In coffret 20, coffret 20 is preferably USB interface, or other power supply interfaces, the interface
Generally female mouth, after external interface (rim of the mouth) is inserted into coffret 20, the first test side 121, coffret 20 D+ pin
Or D- pin, the cathode of coffret 20 and the connection of the second test side 122, while 30 anode of power supply, isolated buck circuit 11 are just
Pole, the first test side 121, the D+ pin of coffret 20 or D- pin, the cathode of coffret 20, the second test side 122, every
It is connected to from 11 cathode of reduction voltage circuit with 30 cathode of power supply, after the isolated buck circuit 11 is connected to detection circuit 12, the control
13 control signal output 131 of circuit processed enters the first output state；When external control chip recognizes control signal output
End 131 enters the first output state, carries out corresponding operating, such as controls coffret 20 and is powered；Conversely, control signal output
131 enter the second output state, and external control chip recognizes control signal output 131 and enters the second output shape
State, carries out corresponding operating, such as controls coffret 20 and powers off.
In the present embodiment, the preferred version of two kinds of detection devices is provided.
Scheme one, and refer to Fig. 5.
The control circuit 13 further includes the first triode Q5 and the first photo-coupler U2, the base of the first triode Q5
Pole is connect with the output end of the first test side 121 and isolated buck circuit 11 respectively, the primary side point of the first photo-coupler U2
Do not connect with the collector of the output end of isolated buck circuit 11 and the first triode Q5, secondary side respectively with signal output end
131 connect with ground terminal；The first triode Q5 is disconnected when the first test side 121 is connected to the second test side 122, and is controlled
First photo-coupler U2 is disconnected, the signal output end 131 not output signal；And the first triode Q5 is in the first inspection
Conducting when disconnecting when end 121 is connected to the second test side 122 is surveyed, and controls the first photo-coupler U2 conducting, the signal output
131 ground connection of end.
Specifically, when the first test side 121 is connected to the second test side 122, i.e. the first test side 121, coffret 20
D+ pin or D- pin, the cathode of coffret 20 and the second test side 122 connection, isolated buck circuit 11 with first detect
End 121 and the second test side 122 constitute primary Ioops, and the electric current of isolated buck circuit 11 enters the branch of resistance R1 by its output end
Road, the first triode Q5 are disconnected, i.e. the collector and emitter of the first triode Q5 is not turned on, the primary side of the first photo-coupler U2
No power, the secondary side of the first photo-coupler U2 is with disconnection, signal output end 131VCC not output signal.
And first test side 121 and the second test side 122 when disconnecting, isolated buck circuit 11 and the first test side 121
It cannot constitute circuit, the anode of isolated buck circuit 11 provides mono- bias voltage of the first triode Q5 by resistance R1, and the one or three
Pole pipe Q5 conducting, i.e. the collector and emitter conducting of the first triode Q5, the primary side of the first photo-coupler U2 are powered, that is, are isolated
The anode of reduction voltage circuit 11 is powered by the primary side that resistance R4 is the first photo-coupler U2, the secondary side of the first photo-coupler U2 with
Access, signal output end 131VCC ground connection.
Scheme two, and refer to Fig. 6.
The detection device includes the second photo-coupler U1 and the second triode Q4, the second triode Q4 and the second light
The secondary side of coupler U1 constitutes control circuit 13, the primary side of the second photo-coupler U1, the first test side 121 and the second detection
End 122 constitute detection circuits 12, the primary side of the second photo-coupler U1 respectively with the first test side 121 and isolated buck circuit
11 output end connection, the base stage of the second triode Q4 respectively with the secondary side of the second photo-coupler U1 and isolated buck circuit
11 input terminal connection, collector are connect with signal output end 131, emitter ground connection；The second photo-coupler U1 exists
First test side 121 is connected when being connected to the second test side 122, and controls the second triode Q4 and disconnect, the signal output end
131 not output signals；And the second photo-coupler U1 breaks when the first test side 121 is connected to the second test side 122
It opens, and controls the second triode Q4 conducting, the signal output end 131 is grounded.
Specifically, when the first test side 121 is connected to the second test side 122, i.e. the first test side 121, coffret 20
D+ pin or D- pin, the cathode of coffret 20 and the second test side 122 connection, isolated buck circuit 11 with first detect
End 121 and the second test side 122 constitute primary Ioops, and the electric current of isolated buck circuit 11 enters the branch of resistance R4 by its output end
The primary side on road, the second photo-coupler U1 is powered, and secondary side conducting, the electric current of the positive VIN of power supply 30 passes through resistance R5, the second light
The secondary side of coupler U1 is disconnected to ground terminal, the second triode Q4, i.e. the collector and emitter of the second triode Q4 is not turned on, and is believed
Number output end 131VCC not output signal.
And first test side 121 and the second test side 122 when disconnecting, isolated buck circuit 11 and the first test side 121
Circuit, the primary side no power of the second photo-coupler U1 cannot be constituted, secondary side disconnects, and the positive VIN of power supply 30 passes through resistance R5
Bias voltage, the second triode Q4 conducting, signal output end 131VCC ground connection are provided for the base stage of the second triode Q4.
Wherein, photo-coupler carries out isolation control, and structure is simple, small in size, at low cost.
As shown in Figures 5 to 7, the present invention provides a kind of preferred embodiment of reduction voltage circuit.
The isolated buck circuit 11 includes reduction voltage circuit 111 and isolation circuit 112, when the isolation circuit 112 includes
Clock chip (clock gen), third transistor Q2 and the first transformer T1, the base stage of third transistor Q2 and the ck of clock chip
Control terminal connection, the input list of the reduction voltage circuit 111 are connect with power supply 30, the primary coil difference of the first transformer T1
It is connect with the collector of the output end of reduction voltage circuit 111 and third transistor Q2, secondary coil is defeated as reduction voltage circuit 111
Outlet.
Specifically, and refer to Fig. 7, the clock chip include with the first amplifier amplifier U3 saw-toothed wave generator and
The same phase of duty cycle adjustment and driving circuit with the second amplifier amplifier U4, the first amplifier amplifier U3 passes through resistance
R6 ground connection, reverse phase are connect by capacitor C3, and output end passes through same being connected of resistance R8 and the second amplifier amplifier U4, into
One step, the same phase of the first amplifier amplifier U3 also passes through the output end that resistance R7 accesses resistance R8 and its reverse phase also
The output end of resistance R8 is accessed by resistance R9；The reverse phase of second amplifier amplifier U4 accesses pull-up resistor R10, further,
The reverse phase of second amplifier amplifier U4 also passes through resistance R11 and is grounded, and output end is as ck control terminal.And the resistance R8
Between the same phase of the second amplifier amplifier U4, also light passing zener diode DZ3 and DZ4 is grounded.
Wherein, which is generated using double operational structure has the square wave of certain duty ratio, frequency for realizing function
Rate transformation avoids realizing that insufficient bring driving capability, cost and power consumption are asked using the complex chips such as single-chip microcontroller or 555 timers
Topic.
Further, the secondary coil of the first transformer T1 is also connect with a current rectifying and wave filtering circuit, the rectifying and wave-filtering electricity
Road includes the diode D1 connecting with the output end of the secondary coil of the first transformer T1, and the secondary with the first transformer T1
The capacitor C2 of coils from parallel connection of coils, the resistance R2 being serially connected and resistance R3, triode Q3, the base stage and resistance R2 and electricity of triode Q3
The node connection of R3 is hindered, triode Q3 collector is connect with the output end of the secondary coil of the first transformer T1, and emitter connects
Ground.
Preferably, the first transformer T1 is high-frequency power transformer.Since output no-load voltage ratio is small, power is small, and volume can
To be made very small, avoid using the problem that Industrial Frequency Transformer bring volume is big, power consumption is big, price is high.
In the present embodiment, the reduction voltage circuit 111 includes the 4th triode Q1, and the base stage of the 4th triode Q1 is logical
It crosses resistance R1 to connect with 30 anode VIN of power supply, and is grounded by zener diode DZ1, the collector of the 4th triode Q1
Connect with 30 anode VIN of power supply, the transmitting of the 4th triode Q1 collection respectively with the primary coil of the first transformer T1 and when
The vdd connection of clock chip, and be grounded by capacitor C1.
Further, power supply 30 is depressurized to by 5V voltage by reduction voltage circuit 111, and by isolation circuit 112 again under
It is down to 2.5V voltage.
Preferably, reduction voltage circuit 111 is super low-power consumption isolation circuit 112, provides super low-power consumption isolation electricity for detection device
Source 30, the voltage stress that device is born in the switch change device of 5V to 2.5V is very small, therefore long-time non-stop run, will not
Loss, problems of excessive heat were generated, at low cost, small in size, no electromagnetic pollution is reduced.
As shown in Figure 8 and Figure 9, the present invention provides a kind of preferred embodiment of power supply system.
A kind of power supply system, the power supply system include detection device 41 and power supply circuit 42, and the power supply circuit 42 wraps
Include power input 422, governor circuit 424, the second transformer 423 and coffret 421, second transformer 423 just
Grade coil is connect with power input 422 and governor circuit 424 respectively, and secondary coil is connect with coffret 421, the electricity
Source input terminal 422 is connect with the input terminal of the isolated buck circuit of detection device 41, also passes through a resistance and governor circuit 424
Power end connection, the power end of the governor circuit 424 are also connect with the signal output end of detection device 41；The governor circuit
424 connect in signal output end not output signal with power input 422, and control power supply circuit 42 works；And the master
Control circuit 424 is grounded when signal output end is grounded, and is stopped power supply circuit 42 and is worked.
In the present embodiment, the preferred version of two kinds of detection devices 41 is provided.
Scheme one, with reference to Figure 10, adopt power supply circuit 42 and use charging circuit.
Power input 422 includes L, N input terminal, and is input in bridge rectifier DB1, output end respectively with change
The primary coil of depressor T2 connects, and draws an out-put supply end VIN, powers for detection device 41；Transformer T2 and master control
The HV pin of chip U5 connects, and power end VCC is connect with the signal output end VCC of detection device 41, and is controlled by detection dress
Set 41 signal output end VCC.Wherein, governor circuit 424 includes main control chip U5, that is, peripheral circuit, the second transformer 423 packet
Include transformer T2 and peripheral circuit.
When signal output end VCC not output signal, the output end of power input 422 is powered resistance R12 as main control chip
The power end VCC of U5 powers, and main control chip U5 work makes power input 422, governor circuit 424,423 shape of the second transformer
At primary Ioops, coffret 421 is powered.
When signal output end VCC ground connection, the power end VCC ground connection of main control chip U5, main control chip U5 stops working, makes
Power input 422, governor circuit 424, the second transformer 423 cannot form primary Ioops, and coffret 421 powers off.
Scheme two, with reference to Figure 11, adopt power supply circuit 42 and use adapter circuit.
The circuit of adapter circuit and power supply circuit 42 are much the same, and the feedback fraction of mainly the two is different, again
It does not describe one by one.
As shown in Figure 12 and Figure 13, the present invention provides a kind of preferable implementation of power supply system based on multiple coffrets
Example.
The power supply system includes multiple coffrets 421, the first test side of the detection device 41 respectively with each biography
The D+ pin or D- pin of defeated interface 421 connect, the second test side of the detection device 41 respectively with each coffret 421
Cathode connection.
As described above, only preferred embodiment is not intended to limit the scope of the present invention, Fan Yibenfa
Equivalent change or modification made by bright claim is all that the present invention is covered.
Claims (10)
1. a kind of detection device of coffret, it is characterised in that：The detection device includes isolated buck circuit, control circuit
And detection circuit, the detection circuit include the first test side connecting with the D+ pin of coffret or D- pin, Yi Jiyu
Second test side of the cathode connection of coffret, the control circuit include a signal output end, the detection circuit difference
It is connect with isolated buck circuit and control circuit；The control circuit is when the first test side is connected to the second test side, control
Signal output end enters the first output state, conversely, control signal output enters the second output state.
2. detection device according to claim 1, it is characterised in that：The control circuit further includes the first triode and
The base stage of one photo-coupler, first triode is connect with the output end of the first test side and isolated buck circuit respectively, institute
The primary side for stating the first photo-coupler is connect with the collector of the output end of isolated buck circuit and the first triode respectively, secondary side
It is connect respectively with signal output end and ground terminal；First triode is disconnected when the first test side is connected to the second test side,
And control the first photo-coupler and disconnect, the signal output end not output signal；And first triode is in the first detection
Conducting when end disconnects when being connected to the second test side, and the conducting of the first photo-coupler is controlled, the signal output end ground connection.
3. detection device according to claim 1, it is characterised in that：The detection device includes the second photo-coupler and the
The secondary side of two triodes, second triode and the second photo-coupler constitutes control circuit, the original of second photo-coupler
Side, the first test side and the second test side constitute detection circuit, the primary side of second photo-coupler respectively with the first test side
Connected with the output end of isolated buck circuit, the base stage of second triode respectively with the secondary side of the second photo-coupler and be isolated
The input terminal of reduction voltage circuit connects, and collector is connect with signal output end, emitter ground connection；Second photo-coupler exists
First test side is connected when being connected to the second test side, and controls the second triode and disconnect, and the signal output end does not export letter
Number；And second photo-coupler is disconnected when the first test side is connected to the second test side, and is controlled the second triode and led
It is logical, the signal output end ground connection.
4. detection device according to any one of claims 1 to 3, it is characterised in that：The isolated buck circuit includes decompression
Circuit and isolation circuit, the isolation circuit include clock chip, third transistor and the first transformer, the base of third transistor
The connection of the ck control terminal of pole and clock chip, the input of the reduction voltage circuit singly connect to power supply, at the beginning of first transformer
Grade coil is connect with the collector of the output end of reduction voltage circuit and third transistor respectively, and secondary coil is as reduction voltage circuit
Output end.
5. detection device according to claim 4, it is characterised in that：First transformer is high-frequency power transformer.
6. detection device according to claim 4, it is characterised in that：The reduction voltage circuit includes the 4th triode, described
The base stage of 4th triode is connect by resistance with positive pole, and is grounded by zener diode, the 4th triode
Collector is connect with positive pole, the transmitting of the 4th triode collection respectively with the primary coil of the first transformer and clock core
The vdd connection of piece, and pass through capacity earth.
7. detection device according to claim 4, it is characterised in that：The clock chip includes having the amplification of the first amplifier
The saw-toothed wave generator of device and duty cycle adjustment and driving circuit with the second amplifier amplifier, the first amplifier amplifier
Same phase by resistance eutral grounding, by capacitively connecing, output end is connected reverse phase with the second the same of amplifier amplifier, instead
Mutually access pull-up resistor, output end is as ck control terminal.
8. a kind of power supply system, it is characterised in that：The power supply system includes the detection device as described in claim 2-7 is any
And power supply circuit, the power supply circuit include power input, governor circuit, the second transformer and coffret, described second
The primary coil of transformer is connect with power input and governor circuit respectively, and secondary coil is connect with coffret, described
The input terminal of the isolated buck circuit of power input and detection device connects, and also passes through the power end of a resistance and governor circuit
Connection, the power end of the governor circuit are also connect with the signal output end of detection device；The governor circuit is exported in signal
It is connect when holding not output signal with power input, control power supply circuit work；And the governor circuit is in signal output end
It is grounded when ground connection, stops power supply circuit work.
9. power supply system according to claim 8, it is characterised in that：The power supply circuit is charging circuit or adaptation electricity
Road.
10. power supply system according to claim 8, it is characterised in that：The power supply system includes multiple coffrets, institute
The first test side for stating detection device is connect with the D+ pin of each coffret or D- pin respectively, and the second of the detection device
Test side is connect with the cathode of each coffret respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810195526.8A CN108832666B (en) | 2018-03-09 | 2018-03-09 | Detection device of transmission interface and power supply system |
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| CN201810195526.8A CN108832666B (en) | 2018-03-09 | 2018-03-09 | Detection device of transmission interface and power supply system |
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| CN108832666B CN108832666B (en) | 2024-04-02 |
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| CN108832666B (en) | 2024-04-02 |
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