CN109104091A - A kind of power circuit and power supply adaptor - Google Patents
A kind of power circuit and power supply adaptor Download PDFInfo
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- CN109104091A CN109104091A CN201810914913.2A CN201810914913A CN109104091A CN 109104091 A CN109104091 A CN 109104091A CN 201810914913 A CN201810914913 A CN 201810914913A CN 109104091 A CN109104091 A CN 109104091A
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- 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
- H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
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- Dc-Dc Converters (AREA)
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Abstract
The invention discloses a kind of power circuits, including power input, power output end, switch control module, rectification module, energy supply control module, transformer module and output module；The connection of the input terminal of power input and rectification module, the output end of rectification module are connect with the first input end of the input terminal of switch control module and transformer module respectively, and the first output end of switch control module and the first input end of transformer module connect；The input terminal of energy supply control module and the second output terminal of switch control module connect, and the output end of energy supply control module and the second input terminal of transformer module connect；The input terminal of output module and the output end of transformer module connect, and the output end of output module is connect with power output end.The invention also discloses a kind of power supply adaptors.Using the embodiment of the present invention, equipment power supply can be continued as when power-down conditions occur, to cause the device to complete the transmission of Dying Gasp signal, reduce cost.
Description
Technical field
The present invention relates to electronic technology field more particularly to a kind of power circuits and power supply adaptor.
Background technique
Dying gasp signal refers to that when system input voltage is unable to satisfy system worked well, system can be automatic
A signal is sent out to local side, the signal for telling central office system that may can not work normally.With the continuous hair of electronic product
Exhibition progress, there has also been biggish breakthrough, current CPE (customer terminal equipment) equipment during power down, to need to send out for every the relevant technologies
Dying gasp signal informs that the current CPE of local side can not work power down to local side out, and release should after local side responds the signal
Channel used in CPE.It continues as setting by the self-contained storage capacitor of cpe device after power down occurs in the prior art
Standby of short duration power supply, so that the CPU (central processing unit) in equipment can complete the transmission of Dying Gasp signal, but makes
The space of CPE, higher cost can be occupied with CPE itself storage capacitor, and are guarantee dying gasp message energy reliable diffusion, storage
Can circuit generally require and maintain CPE work 10ms or so, therefore lead to that the capacitor's capacity of accumulator is big, volume is big and PCB
Occupied space is big.
Summary of the invention
The purpose of the embodiment of the present invention is that providing a kind of power circuit and power supply adaptor, power-down conditions can occur
When, equipment power supply is continued as, to cause the device to complete the transmission of Dying Gasp signal, reduces cost.
To achieve the above object, the embodiment of the invention provides a kind of power circuits, including power input, power supply to export
End, switch control module, rectification module, energy supply control module, transformer module and output module；Wherein,
The power input is connect with the input terminal of the rectification module, and the output end of the rectification module is opened with described
The input terminal connection of control module is closed, the output end of the rectification module also connects with the first input end of the transformer module
It connects, the first output end of the switch control module is connect with the first input end of the transformer module；
The input terminal of the energy supply control module is connect with the second output terminal of the switch control module, the power supply control
The output end of molding block is connect with the second input terminal of the transformer module；The input terminal of the output module and the transformation
The output end of device module connects, and the output end of the output module is connect with the power output end；
The rectification module includes accumulator, and the switch control module is used to detect the power input hair
When raw power down, the output voltage of the power output end is adjusted to triggering Dying gasp function by the accumulator
Threshold voltage, so that the power circuit continues as the equipment connecting with power circuit power supply.
Compared with prior art, power circuit disclosed by the invention detects that the power supply is defeated in the switch control module
When entering end generation power down, the output voltage of the power output end is adjusted to triggering Dying gasp by the accumulator
The threshold voltage of function, so that the power circuit continues as the equipment connecting with power circuit power supply.It solves existing
Continue as the of short duration power supply of equipment in technology by the self-contained storage capacitor of cpe device after power down occurs, certainly using CPE
The problem of body storage capacitor can occupy the space of CPE, higher cost, while also solving in the prior art to guarantee dying
Gasp message energy reliable diffusion, accumulator, which generally requires, maintains CPE work 10ms or so, therefore leads to the capacitor of accumulator
The problem that capacitance is big, volume is big and PCB occupied space is big.It can be in the power circuit of arranging in pairs or groups in use, equipment is not necessarily to volume
The outer big electrolytic capacitor of addition, greatly reduces space and the cost of equipment, in the system of the power circuit bonding apparatus, drop
Low total placement amount of capacitor, significantly reduces costs, while the detection of AC power down can be effectively reduced and be eliminated existing DC detection
The false triggering of mode can continue as equipment power supply when power-down conditions occur, to cause the device to complete Dying Gasp signal
Transmission, reduce cost.
As an improvement of the above scheme, the switch control module includes first resistor, second resistance, 3rd resistor,
Four resistance, the 5th resistance, triode, first diode and relay；Wherein,
The first end of the first resistor is connect with the input terminal of the switch control module, and the second of the first resistor
End is connect with the first end of the second resistance, the second end ground connection of the second resistance；
The first end of the triode is connect with the second end of the first resistor, the second end of the triode with it is described
The anode connection of first diode, the cathode of the first diode are connect with the second end of the 3rd resistor, the third
The first end of resistance is connect with the first output end of the switch control module, the third end ground connection of the triode；
First pin of the relay is connect with the second end of the 3rd resistor, the second pin of the relay with
The first end of 4th resistance connects, and the third pin of the relay and the second output terminal of the switch control module connect
It connects, the 4th pin of the relay is connect with the first end of the 5th resistance, the 5th pin of the relay and the 5th
The second end of resistance connects, the 6th pin ground connection of the relay, the 7th pin and the 4th resistance of the relay
Second end connection, the 8th pin of the relay connect with the positive of the first diode.
As an improvement of the above scheme, the triode is NPN type triode, and the first end of the triode is described
The base stage of NPN type triode, the second end of the triode are the collector of the NPN type triode, the of the triode
Three ends are the emitter of the NPN type triode.
As an improvement of the above scheme, the rectification module further includes the second diode, third diode, the 4th diode
With the 5th diode；Wherein,
The plus earth of second diode, anode of the anode of second diode also with the 4th diode
Connection, the cathode of the 4th diode connect with the input terminal of the rectification module, the cathode of the 4th diode also with
The anode connection of 5th diode, the cathode of the 5th diode is connect with the output end of the rectification module, described
The cathode of 5th diode is also connect with the cathode of the third diode, the anode and the described 2nd 2 of the third diode
The cathode of pole pipe connects, and the anode of the third diode is also connect with the input terminal of the rectification module；
The first end of the accumulator is connect with the output end of the rectification module, the second termination of the accumulator
Ground.
As an improvement of the above scheme, the accumulator includes first capacitor；Wherein, the first end of the first capacitor
It is connect with the first end of the accumulator, the second end of the first capacitor is connect with the second end of the accumulator.
As an improvement of the above scheme, the energy supply control module includes power supply control chip and the second capacitor；Wherein,
First pin of the power supply control chip is connect with the input terminal of the energy supply control module；The power supply control
The second pin of chip is connect with the first end of second capacitor, the second end ground connection of second capacitor；The power supply control
4th pin of coremaking piece and the output end of energy supply control module connect；5th pin of the power supply control chip, the 6th draw
Foot, the 7th pin and the 8th pin are grounded.
As an improvement of the above scheme, the first pin of the power supply control chip is feedback pin, the power supply control
4th pin of chip is control pin.
As an improvement of the above scheme, the transformer module includes transformer and the 6th resistance；Wherein, the transformer
Vice-side winding including the first primary side winding, the second primary side winding, the first end of the 6th resistance and second primary side around
The first end connection of group, the second end of the 6th resistance are connect with the second output terminal of the switch control module.
As an improvement of the above scheme, the output module includes the 6th diode, third capacitor, the 4th capacitor and the 7th
Resistance；Wherein,
6th diode anode connect with the input terminal of the output module, the cathode of the 6th diode and
The output end of the output module connects；The first end of the third capacitor is connect with the output end of the output module, described
The second end of third capacitor is grounded；The first end of 4th capacitor is connect with the output end of the output module, and the described 4th
The second end of capacitor is grounded；The first end of 7th resistance is connect with the output end of the output module, the 7th resistance
Second end ground connection.
To achieve the above object, the embodiment of the present invention also provides a kind of power supply adaptor, including such as above-mentioned any embodiment
The power circuit.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of power circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of circuit diagram of power circuit provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It is a kind of structural schematic diagram of power circuit provided in an embodiment of the present invention referring to Fig. 1, Fig. 1；Including power input
Hold IN, power output end OUT, switch control module 1, rectification module 2, energy supply control module 3, transformer module 4 and output
Module 5；Wherein,
The power input IN is connect with the input terminal IN1 of the rectification module 2, the output end of the rectification module 2
OUT1 is connect with the input terminal IN2 of the switch control module 1, the output end OUT1 of the rectification module 2 also with the transformation
The first input end IN4 connection of device module 4, the first output end OUT2 and the transformer module 4 of the switch control module 1
First input end IN4 connection；
The input terminal IN3 of the energy supply control module 3 is connect with the second output terminal OUT3 of the switch control module 1,
The output end OUT4 of the energy supply control module 3 is connect with the second input terminal IN5 of the transformer module 4；The output mould
The input terminal IN6 of block 5 is connect with the output end OUT5 of the transformer module 4, the output end OUT6 of the output module 5 and institute
State power output end OUT connection；
The rectification module 2 includes accumulator, and the switch control module 1 is for detecting the power input
When power down occurs for IN, the output voltage of the power output end OUT is adjusted to triggering Dying by the accumulator
The threshold voltage of gasp function, so that the power circuit continues as the equipment connecting with power circuit power supply.
Specifically, referring to fig. 2, Fig. 2 is a kind of circuit diagram of power circuit provided in an embodiment of the present invention.The switch control
Molding block 1 includes first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, triode Q1, the
One diode D1 and relay K1；Wherein,
The first end of the first resistor R1 is connect with the input terminal IN2 of the switch control module 1, the first resistor
The second end of R1 is connect with the first end of the second resistance R2, the second end ground connection of the second resistance R2；
The first end of the triode Q1 is connect with the second end of the first resistor R1, the second end of the triode Q1
It is connect with the anode of the first diode D1, the second end of the cathode of the first diode D1 and the 3rd resistor R3 connect
It connects, the first end of the 3rd resistor R3 is connect with the first output end OUT2 of the switch control module 1, the triode Q1
Third end ground connection；
The first pin of the relay K1 is connect with the second end of the 3rd resistor R3, and the second of the relay K1
Pin is connect with the first end of the 4th resistance R4, the third pin of the relay K1 and the switch control module 1
Second output terminal OUT3 connection, the 4th pin of the relay K1 are connect with the first end of the 5th resistance R5, it is described after
The 5th pin of electric appliance K1 is connect with the second end of the 5th resistance R5, the 6th pin ground connection of the relay K1, the relay
The 7th pin of device K1 is connect with the second end of the 4th resistance R4, the 8th pin and the described 1st of the relay K1
The anode connection of pole pipe D1.
Specifically, the triode Q1, the first resistor R1 and tri- devices of the second resistance R2 are for detecting AC
Power down.As shown in Fig. 2, needing the value by detecting U1 to confirm AC power down, when U1 is lower than preset value U1min, it is believed that
AC power down, such as base voltage, that is, V as the triode Q1B=U1* (R2/ (R2+R1)) is less than the base of the triode Q1
The voltage V of pole and emitterBEWhen, the triode Q1 pipe shutdown then shows AC power down at this time.Specifically, the AC with 220V is defeated
For entering, U1max isConsider charge and discharge and ripple of the first capacitor C1 to AC signal, presets
U1min=280V, when U1 is less than 280V, it is believed that AC power down.In view of the fluctuation of AC input, to ensure to reduce false triggering, this
Place can suitably increase surplus.
Preferably, the triode Q1 is NPN type triode, and the first end of the triode Q1 is three pole of NPN type
The base stage of pipe, the second end of the triode Q1 are the collector of the NPN type triode, and the third end of the triode Q1 is
The emitter of the NPN type triode.
Specifically, the transformer module 4 includes transformer T1 and the 6th resistance R6；Wherein, the transformer T1 includes
The vice-side winding of first primary side winding, the second primary side winding, the first end and second primary side winding of the 6th resistance R6
First end connection, the second end of the 6th resistance R6 connect with the second output terminal OUT2 of the switch control module.Institute
The first end for stating the first primary side winding is connect with the output end OUT1 of the rectification module 2, and the second of first primary side winding
End connect with the output end OUT4 of the energy supply control module 3, and the second end of second primary side winding is grounded, the secondary side around
The first end of group and described and the vice-side winding second end are as the output winding (output end of the i.e. described transformer module 4
OUT5), output voltage is supplied to the output module 6.
Specifically, the relay K1 is for switching feedback resistance；The first diode D1 is used for afterflow, the third
Resistance R3 is used for current limliting, prevents the relay K1 from being destroyed by high current；When four resistance access circuit, the described 6th
Resistance R6 and the 4th resistance R4 is used to control the value of normal output voltage Vout；When the 5th resistance R5 accesses circuit
When, the 6th resistance R6 and the 5th resistance R5 are for controlling threshold voltage Vdying (the i.e. described electricity exported after power down
Source output terminal OUT) value.
Specifically, the relay K1 with the triode Q1 turn off when and conducting and work, wherein it is described after
The specific work process of electric appliance K1 is as follows: when the triode Q1 is in the conductive state, electric current flows through the 3rd resistor R3
And 1 and 8 feet of the relay K1, the magnetic core charging of the relay K1 pick up the inner shrapnel of the relay K1, at this time
3,4,6 and 5 feet of the relay K1 are respectively communicated with, that is, correspond to the 5th resistance R5 access circuit, the 4th resistance R4
It disconnects；When the triode Q1 is in an off state, the energy in the relay K1 magnetic core passes through the first diode
Pair D1 is discharged and is consumed, and the elastic slice of the relay K1 bounces, and 3,2,6 and 7 feet of the relay K1 are respectively communicated at this time, i.e.,
The 4th resistance R4 access circuit is answered, the 5th resistance R5 is disconnected.
Preferably, when the triode Q1 pipe turns off, the relay K1 is switched to not enable by enabled, by the described 5th
Resistance R5 access switchs to the 4th resistance R4 access, i.e., output voltage becomes Vdying from Vout, in which: Vout=VFB*(1+
R6/R5)；Vdying=VFB*(1+R6/R4)；VFBIt is the base of the chip (the i.e. described power supply control chip UB) of the power circuit
Quasi- voltage is a fixed value relevant with chip, and the reference voltage is for demarcating output voltage, it is ensured that the standard of output voltage values
True property.
Specifically, the rectification module 2 further includes the second diode D2, third diode D3, the 4th diode D4 and
Five diode D5；Wherein,
The plus earth of the second diode D2, the second diode D2 anode also with the 4th diode D4
Anode connection, the cathode of the 4th diode D4 connect with the input terminal IN1 of the rectification module 2, the four or two pole
The cathode of pipe D4 is also connect with the anode of the 5th diode D5, the cathode and the rectification module of the 5th diode D5
2 output end OUT1 connection, the cathode of the 5th diode D5 are also connect with the cathode of the third diode D3, and described
The anode of three diode D3 is connect with the cathode of the second diode D2, the third diode D3 it is positive also with it is described whole
The input terminal IN1 connection of flow module 2；The first end of the accumulator is connect with the output end OUT1 of the rectification module 2, institute
State the second end ground connection of accumulator.
Preferably, the accumulator includes first capacitor C1；Wherein, the first end of the first capacitor C1 and the storage
The first end connection of energy circuit, the second end of the first capacitor C1 are connect with the second end of the accumulator.
Specifically, the second diode D2, the third diode D3, the 4th diode D4 and the described 5th 2
Pole pipe D5 forms rectifier bridge, and the input terminal IN1 of the rectification module 2 includes two, the end H and the end L respectively shown in Fig. 2,
In, the anode connection of the end H and the third diode D3, the end L is connected with the cathode of the 4th diode D4.Institute
Rectifier bridge and first capacitor C1 composition rectification circuit are stated, the first capacitor C1 is filtered direct current signal, thus
To more smooth direct current signal, while also as the energy storage device for realizing dying gasp.
Specifically, the energy supply control module 3 includes power supply control chip UB and the second capacitor C2；Wherein, the power supply
The first pin of control chip UB is connect with the input terminal IN3 of the energy supply control module 3；The of the power supply control chip UB
Two pins are connect with the first end of the second capacitor C2, the second end ground connection of the second capacitor C2；The power supply controls core
The 4th pin of piece UB is connect with the output end OUT4 of energy supply control module 3；The 5th pin of the power supply control chip UB,
Six pins, the 7th pin and the 8th pin are grounded.
Preferably, the first pin of the power supply control chip UB is feedback pin FB, the power supply control chip UB's
4th pin is control pin D.Specifically, there are two the power supply control chip UB effect is main, first is that passing through the control
Switch of the pin D as the power circuit, second is that providing feedback voltage by the feedback pin FB.Preferably, the electricity
The model SC1162 of source control chip UB.
Specifically, the output module 5 includes the 6th diode D6, third capacitor C3, the 4th capacitor C4 and the 7th resistance
R7；Wherein, the anode of the 6th diode D6 is connect with the input terminal IN6 of the output module 5, the 6th diode D6
Cathode connect with the output end OUT6 of the output module 5；The first end of the third capacitor C3 and the output module 5
Output end OUT6 connection, the second end ground connection of the third capacitor C3；The first end of the 4th capacitor C4 and the output mould
The output end OUT6 connection of block 5, the second end ground connection of the 4th capacitor C4；The first end of the 7th resistance R7 with it is described defeated
The output end OUT connection of module 5 out, the second end ground connection of the 7th resistance R7.Specifically, the 6th diode D6 be for
Afterflow, the effect of the third capacitor C3 is output energy storage and absorbs ripple, and the effect of the 4th capacitor C2 is filtering.
Specifically, the power circuit exports power-off signal when detecting AC power down, and will be defeated within the △ td time
Voltage Vout is adjusted to the threshold voltage Vdying of triggering Dying gasp out, is maintained at Vdying output certain time, at this moment
The energy storage used is mainly the energy storage of the first capacitor C1.By the energy storage by the first capacitor C1, it is able to maintain defeated
Voltage certain time on Vdying out.
Minimum effectively input voltage is Unor_min, the power supply when defining the normal work of the power supply control chip UB
The output power consumption of circuit is Po, efficiency η, and the calculating of specific time is as follows: according to law of conservation of energy, there is 0.5*C1*
(U1min2-Unor_min2)=△ t*Po/ η；Wherein, △ t is voltage hold-time.
By taking SC1162 as an example, it is fully loaded with output power consumption Po=12W, Unor_min=50V, U1min=280V, C1=
22uF, η=0.8, at this time △ t=55.66ms.Consider extreme case, when using 110V voltage input, needs to be promoted described the at this time
The capacitance of one capacitor C1 is to meet the requirements.C1=47uF, U1min=120V are taken, at this time △ t=18.6ms.Only need described first
Capacitor C1 has the capacitive energy storage of 22uF or 47uF, has the no less than time of 10ms or more to be used for transmission after Voltage Drop can be realized
Dying gasp message, can ensure that by Optimal Parameters.
When it is implemented, passing through institute when the switch control module 1 detects that power down occurs for the power input IN
Accumulator is stated to adjust the output voltage of the power output end OUT to the threshold voltage of triggering Dying gasp function, with
The power circuit is set to continue as the equipment connecting with power circuit power supply.
Compared with prior art, the power circuit disclosed by the invention solves leads to after power down occurs in the prior art
The self-contained storage capacitor of cpe device is crossed to continue as the of short duration power supply of equipment, CPE can be occupied using CPE itself storage capacitor
Space, the problem of higher cost, while also solving in the prior art to guarantee dying gasp message energy reliable diffusion, storage
Can circuit generally require and maintain CPE work 10ms or so, therefore lead to that the capacitor's capacity of accumulator is big, volume is big and PCB
The big problem of occupied space.It can be in the power circuit of arranging in pairs or groups in use, equipment is not necessarily to additionally add big electrolytic capacitor, greatly
Reduction equipment space and cost, accumulator has shared the first capacitor C1 in the rectification module 2, in the electricity
In the system of source circuit bonding apparatus, total placement amount of capacitor is reduced, is significantly reduced costs, while can to the detection of AC power down
The false triggering of existing DC detection pattern is effectively reduced and eliminated, equipment power supply can be continued as when power-down conditions occur, so that
Equipment can complete the transmission of Dying Gasp signal, reduce cost.
The embodiment of the invention also provides a kind of power supply adaptor, a kind of electricity of the offer including the embodiments of the present invention
Source circuit, the specific structure of power circuit are referred to the explanation of embodiments of the present invention offer, and details are not described herein again.
The cpe device specifically, power supply adaptor can arrange in pairs or groups, to realize the Dying gasp function of cpe device, institute
Power supply adaptor detection AC power down is stated, power-off signal is exported；And output voltage Vout is adjusted to triggering within the △ td time
The threshold value Vdying of Dying gasp；Power supply adaptor is maintained at Vdying output certain time, and the energy storage at this moment used is main
It is the energy storage of the input capacitance (the i.e. described first capacitor C1) of the transformer prime of power supply adaptor.Corresponding cpe device side, is being examined
When measuring Voltage Drop, cpe device judgement is i.e. by power down, to issue dying gasp message to local side.The power adaptation
Device can continue as equipment power supply when power-down conditions occur, and to cause the device to complete the transmission of Dying Gasp signal, reduce
Cost.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of power circuit, which is characterized in that including power input, power output end, switch control module, rectification mould
Block, energy supply control module, transformer module and output module；Wherein,
The power input is connect with the input terminal of the rectification module, and the output end of the rectification module and the switch are controlled
The input terminal of molding block connects, and the output end of the rectification module is also connect with the first input end of the transformer module, institute
The first output end for stating switch control module is connect with the first input end of the transformer module；
The input terminal of the energy supply control module is connect with the second output terminal of the switch control module, and the power supply controls mould
The output end of block is connect with the second input terminal of the transformer module；The input terminal of the output module and the transformer mould
The output end of block connects, and the output end of the output module is connect with the power output end；
The rectification module includes accumulator, and the switch control module is used to detect that the power input falls
When electric, the output voltage of the power output end is adjusted to the threshold value of triggering Dying gasp function by the accumulator
Voltage, so that the power circuit continues as the equipment connecting with power circuit power supply.
2. power circuit as described in claim 1, which is characterized in that the switch control module includes first resistor, second
Resistance, 3rd resistor, the 4th resistance, the 5th resistance, triode, first diode and relay；Wherein,
The first end of the first resistor is connect with the input terminal of the switch control module, the second end of the first resistor with
The first end of the second resistance connects, the second end ground connection of the second resistance；
The first end of the triode is connect with the second end of the first resistor, the second end of the triode and described first
The anode connection of diode, the cathode of the first diode are connect with the second end of the 3rd resistor, the 3rd resistor
First end connect with the first output end of the switch control module, the third end of triode ground connection；
First pin of the relay is connect with the second end of the 3rd resistor, the second pin of the relay with it is described
The first end of 4th resistance connects, and the third pin of the relay is connect with the second output terminal of the switch control module,
4th pin of the relay is connect with the first end of the 5th resistance, the 5th pin of the relay and the 5th resistance
Second end connection, the 6th pin ground connection of the relay, the of the 7th pin of the relay and the 4th resistance
The connection of two ends, the 8th pin of the relay are connect with the anode of the first diode.
3. power circuit as claimed in claim 2, which is characterized in that the triode is NPN type triode, the triode
First end be the NPN type triode base stage, the second end of the triode is the collector of the NPN type triode,
The third end of the triode is the emitter of the NPN type triode.
4. power circuit as described in claim 1, which is characterized in that the rectification module further includes the second diode, third
Diode, the 4th diode and the 5th diode；Wherein,
The plus earth of second diode, the anode of second diode also connect with the anode of the 4th diode
Connect, the cathode of the 4th diode is connect with the input terminal of the rectification module, the cathode of the 4th diode also with institute
The anode connection of the 5th diode is stated, the cathode of the 5th diode connect with the output end of the rectification module, and described the
The cathode of five diodes is also connect with the cathode of the third diode, anode and the two or two pole of the third diode
The cathode of pipe connects, and the anode of the third diode is also connect with the input terminal of the rectification module；
The first end of the accumulator is connect with the output end of the rectification module, the second end ground connection of the accumulator.
5. power circuit as claimed in claim 4, which is characterized in that the accumulator includes first capacitor；Wherein, described
The first end of first capacitor is connect with the first end of the accumulator, the second end of the first capacitor and the accumulator
Second end connection.
6. power circuit as described in claim 1, which is characterized in that the energy supply control module include power supply control chip and
Second capacitor；Wherein,
First pin of the power supply control chip is connect with the input terminal of the energy supply control module；The power supply control chip
Second pin connect with the first end of second capacitor, the second end of second capacitor ground connection；The power supply controls core
4th pin of piece and the output end of energy supply control module connect；The 5th pin, the 6th pin, of the power supply control chip
Seven pins and the 8th pin are grounded.
7. power circuit as claimed in claim 6, which is characterized in that the first pin of the power supply control chip is that feedback is drawn
Foot, the 4th pin of the power supply control chip are control pin.
8. power circuit as claimed in claim 2, which is characterized in that the transformer module includes transformer and the 6th electricity
Resistance；Wherein, the transformer includes the vice-side winding of the first primary side winding, the second primary side winding, and the first of the 6th resistance
End is connect with the first end of second primary side winding, the second end of the 6th resistance and the second of the switch control module
Output end connection.
9. power circuit as described in claim 1, which is characterized in that the output module includes the 6th diode, third electricity
Appearance, the 4th capacitor and the 7th resistance；Wherein,
6th diode anode connect with the input terminal of the output module, the cathode of the 6th diode with it is described
The output end of output module connects；The first end of the third capacitor is connect with the output end of the output module, the third
The second end of capacitor is grounded；The first end of 4th capacitor is connect with the output end of the output module, the 4th capacitor
Second end ground connection；The first end of 7th resistance is connect with the output end of the output module, and the of the 7th resistance
Two ends ground connection.
10. a kind of power supply adaptor, which is characterized in that including power circuit according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810914913.2A CN109104091B (en) | 2018-08-13 | 2018-08-13 | Power supply circuit and power adapter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810914913.2A CN109104091B (en) | 2018-08-13 | 2018-08-13 | Power supply circuit and power adapter |
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| CN109104091B CN109104091B (en) | 2020-01-21 |
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Cited By (1)
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| Publication number | Publication date |
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| CN109104091B (en) | 2020-01-21 |
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Address after: 5 / F, fulizhen building, No.1, Kefa Road, high tech park, Nanshan District, Shenzhen, Guangdong 518000 Patentee after: Shenzhen Lianzhou International Technology Co.,Ltd. Address before: 5 / F, fulizhen building, No.1, Kefa Road, high tech park, Nanshan District, Shenzhen, Guangdong 518000 Patentee before: SHENZHEN PUWEI TECHNOLOGY Co.,Ltd. |
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