CN106130385A - A kind of with the soft high accuracy Symmetrical output high-voltage power circuit opening function - Google Patents
A kind of with the soft high accuracy Symmetrical output high-voltage power circuit opening function Download PDFInfo
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- CN106130385A CN106130385A CN201610722291.4A CN201610722291A CN106130385A CN 106130385 A CN106130385 A CN 106130385A CN 201610722291 A CN201610722291 A CN 201610722291A CN 106130385 A CN106130385 A CN 106130385A
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
The present invention relates to a kind of with the soft high accuracy Symmetrical output high-voltage power circuit opening function, it includes voltage feedback circuit, also includes driving control and soft starting circuit, High voltage output and current foldback circuit.Driving and control and soft starting circuit is connected with High voltage output and current foldback circuit, voltage feedback circuit respectively, High voltage output and current foldback circuit are connected with voltage feedback circuit.Provide the benefit that: transformer high voltage secondary uses single winding, the in addition different voltage multiplying rectifier way of outputs, it is achieved positive and negative symmetrical high exports；Reduce the difficulty of transformer winding, reduce the size of transformator；In the range of certain output loading, it is achieved that the high symmetry of positive and negative High voltage output；Add the start soft start function of control circuit, reduce the startup overshoot phenomenon of output high pressure, improve the reliability of power supply；Overload protection is rapid, has input and double overcurrent protection functions of output electric current.
Description
Technical field
The present invention relates to a kind of be applied to the unauthorized substances such as explosive, drugs, radioactivity are illegally transported be monitored
Field of safety check with the soft high accuracy Symmetrical opening function output high-voltage power circuit.
Background technology
The high voltage power supply of positive and negative output in the market, in processing technology, transformer high voltage secondary uses two mostly
Individual independent winding, the positive and negative mode exported respectively, it is achieved positive and negative High voltage output.In transformer production winding process, two
Needing between high pressure winding to carry out effective insulation processing, to guarantee power source performance requirement, the size for this transformator has increasing
Add.Owing to being two high pressure windings, therefore the problem that there is positive and negative High voltage output symmetry difference.Special because of its application
Property, the positive and negative high pressure symmetry of output is poor, and Instrumental results error can be caused to increase, and even judges by accident.It addition, high voltage power supply
Generally during starting up, output height is pressed with upper punch phenomenon, and too high voltage may result in the damage of precision monitor instrument.Therefore
The Symmetrical output high voltage power supply demand that market is little to volume, output symmetry good, startup high pressure upper punch is little is increasing.
Summary of the invention
In view of the deficiencies in the prior art, the present invention provides that a kind of volume is little, symmetry good, high voltage startup cross rush little with soft
Open the high accuracy Symmetrical output high-voltage power circuit of function.
The present invention for achieving the above object, is adopted the technical scheme that: a kind of positive and negative with the soft high accuracy opening function
Symmetrical output high-voltage power circuit, including voltage feedback circuit, it is characterised in that: also include driving control and soft starting circuit,
High voltage output and current foldback circuit, described driving control and soft starting circuit respectively with High voltage output and current foldback circuit,
Voltage feedback circuit connects, and described High voltage output and current foldback circuit are connected with voltage feedback circuit；
Physical circuit is connected as: described driving controls and in soft starting circuit, supply input+Vin connecting resistance R1's and R31 respectively
One end, one end of inductance L1, the other end of inductance L1 connects at the beginning of the positive pole of electric capacity C21, one end of electric capacity C13, transformator TRF respectively
The Same Name of Ends a foot of level winding Lp, the negative pole of electric capacity C21 meets input ground GND, and the other end of electric capacity C13 is connect respectively by resistance R7
The drain electrode of MOS audion T1, the different name end b foot of primary winding Lp, the other end of resistance R31 connects a reference source U3 respectively
Negative electrode 1 foot, one end of electric capacity C24, and as reference output Vref, anode 3 foot of a reference source U3 and the other end of electric capacity C24
Be connected be followed by power end 8 foot respectively one end of connecting resistance R2 and R4 of input ground GND, control chip U1, the other end of resistance R1,
The negative pole of diode D1, the positive pole of electric capacity C23, and draw as in-line power end Vcc, the negative pole of electric capacity C23 and diode D1
Positive pole be connected be followed by discharge end 7 foot respectively one end of connecting resistance R3 of input ground GND, control chip U1, resistance R2 another
End, triggering after end 2 foot is connected with threshold value end 6 foot of control chip U1 connects one end of electric capacity C22, the other end of resistance R3 respectively,
Reset terminal 4 foot of control chip the U1 other end of connecting resistance R4, the colelctor electrode of audion T2 respectively, on off control end R/S passes through
Resistance R5 connects one end of electric capacity C25, the base stage of audion T2 respectively, and voltage controling end 5 foot of control chip U1 connects electric capacity respectively
The positive pole of diode D5 in one end of C26, the emitter stage of audion T5, voltage feedback circuit, earth terminal 1 foot of control chip U1
It is connected is followed by input ground GND, resistance R6 and two with the other end, the emitter stage of audion T2 of electric capacity C22 and C25 and C26 respectively
Pole pipe D2 is in parallel, and outfan 3 foot of control chip U1 connects the negative pole of diode D2, and the positive pole of diode D2 meets electric capacity C14 respectively
One end, the grid of MOS audion T1, another termination input ground GND, resistance R11 and diode D3 of electric capacity C14 are in parallel, two
The negative pole of pole pipe D3 meets in-line power end Vcc, and the positive pole of diode D3 connects the positive pole of electric capacity C20, the negative pole of diode D4 respectively,
The positive pole of diode D4 connects the base stage of audion T5, and the colelctor electrode of audion T5 is connected with the negative pole of electric capacity C20 and is followed by input ground
GND；
In described High voltage output and current foldback circuit, different name end 1 foot of transformator TRF secondary windings Ls connect respectively electric capacity C1 and
One end of C7, the other end of electric capacity C1 connects the negative pole of diode D7, the positive pole of diode D8, one end of electric capacity C3, electric capacity respectively
The other end of C3 connects the negative pole of diode D9, the positive pole of diode D10 respectively, and resistance R21 is in parallel with electric capacity C28, electric capacity C5 and
C6 connects, and one end of electric capacity C6 connects one end of electric capacity C28 and C2, the positive pole of diode D7, one end of resistance R14, electric capacity respectively
The other end of C2 connects the negative pole of diode D8, the positive pole of diode D9, one end of electric capacity C4 respectively, and the other end of electric capacity C4 is respectively
Connect the negative pole of diode D10, one end of resistance R17, one end of connecting resistance R18 respectively, one end of electric capacity C5, resistance R17 another
End, one end of resistance R30 in voltage feedback circuit, another of another termination the positive high voltage outfan+HV, electric capacity C7 of resistance R18
End connects the negative pole of diode D12, the positive pole of diode D11, one end of electric capacity C9 respectively, and the other end of electric capacity C9 connects two poles respectively
The negative pole of pipe D14, the positive pole of diode D13, resistance R22 is in parallel with electric capacity C29, and electric capacity C11 and C12 connects, the one of electric capacity C12
End connect respectively one end of electric capacity C29 and C8, the negative pole of diode D11, one end of resistance R12 and R15, TRF level of transformator around
Same Name of Ends 2 foot of group Ls, the other end of electric capacity C28 with C29 is connected and is followed by output ground HGND, and the other end of electric capacity C8 connects two respectively
The negative pole of pole pipe D13, the positive pole of diode D12, one end of electric capacity C10, the other end of electric capacity C10 connects diode D14's respectively
Positive pole, one end of resistance R19, one end of electric capacity C11 one end of connecting resistance R20 and R16, the other end of resistance R19, resistance respectively
Another termination negative high voltage outfan-HV of R20, the other end of resistance R15 with R16 is connected, and resistance R32 connects with electric capacity C15, electricity
The other end respectively one end of connecting resistance R13 and R32, inverting input 6 foot of amplifier U2B of resistance R14, another of resistance R13
In-phase input end 5 foot of another termination amplifier U2B of termination internal reference end Vref, resistance R12, the output of amplifier U2B
7 feet are held to connect electric capacity C15 and one end of resistance R10 respectively, the base stage of another termination audion T4 of resistance R10, the one of resistance R9
One end of end connecting resistance R8 respectively, driving control and the source electrode of MOS audion T1 in soft starting circuit, another termination of resistance R8
Input ground GND, the other end of resistance R9 connects one end of electric capacity C16, the base stage of audion T3, the current collection of audion T3 and T4 respectively
Extremely being connected and be followed by driving voltage controling end 5 foot of control chip U1 in control and soft starting circuit, the emitter stage of audion T4 divides
It is not connected is followed by input ground GND with the other end, the emitter stage of audion T3 of electric capacity C16.
The invention has the beneficial effects as follows: transformer high voltage secondary uses single winding, in addition different voltage multiplying rectifier output
Mode, it is achieved positive and negative symmetrical high exports；Reduce the difficulty of transformer winding, reduce the size of transformator；The most defeated
Go out in loading range, it is achieved that the high symmetry of positive and negative High voltage output；Add the start soft start function of control circuit, subtract
The startup overshoot phenomenon of little output high pressure, improves the reliability of power supply；Overload protection is rapid, has input and output electric current
Double overcurrent protection functions.
Accompanying drawing explanation
Fig. 1 is the connection block diagram of the present invention；
Fig. 2 is the schematic diagram of power circuit of the present invention.
Detailed description of the invention
As shown in Figure 1, 2, a kind of with the soft high accuracy Symmetrical output high-voltage power circuit opening function, including voltage
Feedback circuit, also includes driving control and soft starting circuit, High voltage output and current foldback circuit.
Drive and control and soft starting circuit is connected with High voltage output and current foldback circuit, voltage feedback circuit respectively, height
Pressure output and current foldback circuit are connected with voltage feedback circuit.
In above-mentioned driving control and soft starting circuit, supply input+Vin one end of connecting resistance R1 and R31, inductance L1 respectively
One end, the other end of inductance L1 meets the positive pole of electric capacity C21, one end of electric capacity C13, transformator TRF armature winding Lp respectively
Same Name of Ends a foot, the negative pole of electric capacity C21 meets input ground GND, and the other end of electric capacity C13 meets MOS audion T1 respectively by resistance R7
Drain electrode, the different name end b foot of primary winding Lp, the other end of resistance R31 connects negative electrode 1 foot of a reference source U3, electricity respectively
Hold one end of C24, and as reference output Vref, anode 3 foot of a reference source U3 be connected with the other end of electric capacity C24 be followed by defeated
Enter power end 8 foot respectively one end of connecting resistance R2 and R4 of ground GND, control chip U1, the other end of resistance R1, diode D1
Negative pole, the positive pole of electric capacity C23, and draw as in-line power end Vcc, the negative pole of electric capacity C23 is connected with the positive pole of diode D1
It is followed by discharge end 7 foot one end of connecting resistance R3, the other end of resistance R2, the control chip respectively of input ground GND, control chip U1
Triggering after end 2 foot is connected with threshold value end 6 foot of U1 connects one end of electric capacity C22, the other end of resistance R3 respectively, control chip U1's
Reset terminal 4 the foot other end of connecting resistance R4, the colelctor electrode of audion T2 respectively, on off control end R/S is connect respectively by resistance R5
One end of electric capacity C25, the base stage of audion T2, voltage controling end 5 foot of control chip U1 connect respectively one end of electric capacity C26, three
The positive pole of diode D5 in the emitter stage of pole pipe T5, voltage feedback circuit, earth terminal 1 foot of control chip U1 respectively with electric capacity
The other end of C22 with C25 and C26, the emitter stage of audion T2 be connected be followed by input ground GND, resistance R6 in parallel with diode D2,
Outfan 3 foot of control chip U1 connects the negative pole of diode D2, and the positive pole of diode D2 meets one end of electric capacity C14, MOS tri-respectively
The grid of pole pipe T1, another termination input ground GND, resistance R11 and diode D3 of electric capacity C14 are in parallel, the negative pole of diode D3
Meeting in-line power end Vcc, the positive pole of diode D3 connects the positive pole of electric capacity C20, the negative pole of diode D4 respectively, and diode D4 is just
Pole connects the base stage of audion T5, and the colelctor electrode of audion T5 is connected with the negative pole of electric capacity C20 and is followed by input ground GND.
In above-mentioned High voltage output and current foldback circuit, different name end 1 foot of transformator TRF secondary windings Ls connects electric capacity respectively
One end of C1 and C7, the other end of electric capacity C1 connects the negative pole of diode D7, the positive pole of diode D8, one end of electric capacity C3 respectively,
The other end of electric capacity C3 connects the negative pole of diode D9, the positive pole of diode D10 respectively, and resistance R21 is in parallel with electric capacity C28, electric capacity
C5 and C6 connects, and one end of electric capacity C6 connects one end of electric capacity C28 and C2, the positive pole of diode D7, one end of resistance R14 respectively,
The other end of electric capacity C2 connects the negative pole of diode D8, the positive pole of diode D9, one end of electric capacity C4, the other end of electric capacity C4 respectively
Connect the negative pole of diode D10, one end of resistance R17 respectively, one end of electric capacity C5 one end of connecting resistance R18 respectively, resistance R17
One end of resistance R30 in the other end, voltage feedback circuit, another termination positive high voltage outfan+HV of resistance R18, electric capacity C7's
The other end connects the negative pole of diode D12, the positive pole of diode D11, one end of electric capacity C9 respectively, and the other end of electric capacity C9 connects respectively
The negative pole of diode D14, the positive pole of diode D13, resistance R22 is in parallel with electric capacity C29, and electric capacity C11 and C12 connects, electric capacity C12
One end connect one end of electric capacity C29 and C8, the negative pole of diode D11, one end of resistance R12 and R15, transformator TRF time respectively
Same Name of Ends 2 foot of level winding Ls, the other end of electric capacity C28 with C29 is connected and is followed by the other end of output ground HGND, electric capacity C8 respectively
Connecing the negative pole of diode D13, the positive pole of diode D12, one end of electric capacity C10, the other end of electric capacity C10 connects diode respectively
The positive pole of D14, one end of resistance R19, one end of connecting resistance R20 and R16 respectively, one end of electric capacity C11, resistance R19 another
End, another termination negative high voltage outfan-HV of resistance R20, the other end of resistance R15 with R16 is connected, resistance R32 and electric capacity C15
Series connection, the other end of resistance R14 one end of connecting resistance R13 and R32, inverting input 6 foot of amplifier U2B, resistance R13 respectively
Another termination internal reference end Vref, resistance R12 another termination amplifier U2B in-phase input end 5 foot, amplifier U2B
Outfan 7 foot connect electric capacity C15 and one end of resistance R10 respectively, resistance R10 another termination audion T4 base stage, resistance
One end of one end of R9 connecting resistance R8 respectively, driving control and the source electrode of MOS audion T1 in soft starting circuit, and resistance R8's is another
One termination input ground GND, the other end of resistance R9 meets one end of electric capacity C16, the base stage of audion T3, audion T3 and T4 respectively
Colelctor electrode be connected and be followed by driving voltage controling end 5 foot of control chip U1 in control and soft starting circuit, audion T4 sends out
Emitter-base bandgap grading is connected is followed by input ground GND with the other end, the emitter stage of audion T3 of electric capacity C16 respectively.
The model of control chip U1 is: 7555, and the model of amplifier U2 is: 17358, and the model of a reference source U3 is:
LM4040。
For ensureing the insulating properties requirement of power supply, when transformator makes, according to different output high pressure, primary and secondary coil it
Between must meet the resistance to pressure request that insulate, and leave allowance.Transformator after coiling completes need to process through vacuum paint dipping.
For meeting the requirement of output symmetry, the selection of relevant components and parts is highly consistent.As: output times voltage capacitance,
Under conditions of meeting the pressure reliability requirement of output, its capacitance to have the concordance of height.
Rational deployment PCB, it is ensured that input, export, the independent pathway in each loop such as control.
Select the components and parts that Low Drift Temperature, low noise, loss are little, it is provided that the stability of power supply and reliability.
Operation principle
In driving control and soft starting circuit, control chip U1 (7555), electric capacity C22, resistance R2, R3 etc. form the higher-order of oscillation
Circuit, exports high frequency square wave pulse from chip output 3 foot, drives power switch pipe T1 and transformator TRF；Resistance R4, R5 and
Audion T2 and electric capacity C25 forms starting or stopping control circuit, by reset terminal 4 foot of control chip U1, the pulse of control chip U1
Output；Being formed start soft starting circuit by audion T5, diode D3, D4 and electric capacity C20 etc., Vcc passes through resistance R11 to electric capacity
C20 charges.During electric power starting, on electric capacity C20, current potential is zero, and audion T5 turns on, the voltage controling end 5 foot electricity of control chip U1
Position is the lowest, and chip U1 output pulse width is the narrowest；Along with the rising of current potential on electric capacity C20, the control end 5 foot current potential of chip U1 with
Rising, output pulse width gradually broadening, output high pressure gradually rise, reduce exported punching.
In voltage feedback circuit, by resistance R28, R30, C27 etc., it is thus achieved that the sampled voltage of output high pressure, it is with outer
The setting regulation and control voltage Adj of portion's output high pressure relatively after, by error amplifier U2A, to driving in control and soft starting circuit
Voltage controling end 5 foot of control chip U1 is controlled, and then controls output high pressure.
In High voltage output and current foldback circuit, electric capacity C1 ~ C4, diode D7 ~ D10 etc. form positive polarity times piezoelectricity
Road, is formed negative polarity voltage-multiplying circuit by electric capacity C7 ~ C10, diode D11 ~ D14 etc..The high frequency of transformator TRF secondary windings output
High-voltage pulse, respectively by respective voltage-multiplying circuit, exports symmetrical positive and negative high pressure.
The sampled voltage of the positive and negative High voltage output electric current obtained from resistance R21, R22 respectively, through error amplifier U2B,
Control audion T4；The input current sampled voltage obtained from resistance R8, controls audion T3.They all pass through control chip
The 5 foot current potentials of U1, the final peak power output limiting high voltage power supply.
Claims (1)
1., with the soft high accuracy Symmetrical output high-voltage power circuit opening function, including voltage feedback circuit, it is special
Levy and be: also include driving control and soft starting circuit, High voltage output and current foldback circuit, described driving control and soft start
Circuit is connected with High voltage output and current foldback circuit, voltage feedback circuit respectively, described High voltage output and current foldback circuit
It is connected with voltage feedback circuit；
Physical circuit is connected as: described driving controls and in soft starting circuit, supply input+Vin connecting resistance R1's and R31 respectively
One end, one end of inductance L1, the other end of inductance L1 connects at the beginning of the positive pole of electric capacity C21, one end of electric capacity C13, transformator TRF respectively
The Same Name of Ends a foot of level winding Lp, the negative pole of electric capacity C21 meets input ground GND, and the other end of electric capacity C13 is connect respectively by resistance R7
The drain electrode of MOS audion T1, the different name end b foot of primary winding Lp, the other end of resistance R31 connects a reference source U3 respectively
Negative electrode 1 foot, one end of electric capacity C24, and as reference output Vref, anode 3 foot of a reference source U3 and the other end of electric capacity C24
Be connected be followed by power end 8 foot respectively one end of connecting resistance R2 and R4 of input ground GND, control chip U1, the other end of resistance R1,
The negative pole of diode D1, the positive pole of electric capacity C23, and draw as in-line power end Vcc, the negative pole of electric capacity C23 and diode D1
Positive pole be connected be followed by discharge end 7 foot respectively one end of connecting resistance R3 of input ground GND, control chip U1, resistance R2 another
End, triggering after end 2 foot is connected with threshold value end 6 foot of control chip U1 connects one end of electric capacity C22, the other end of resistance R3 respectively,
Reset terminal 4 foot of control chip the U1 other end of connecting resistance R4, the colelctor electrode of audion T2 respectively, on off control end R/S passes through
Resistance R5 connects one end of electric capacity C25, the base stage of audion T2 respectively, and voltage controling end 5 foot of control chip U1 connects electric capacity respectively
The positive pole of diode D5 in one end of C26, the emitter stage of audion T5, voltage feedback circuit, earth terminal 1 foot of control chip U1
It is connected is followed by input ground GND, resistance R6 and two with the other end, the emitter stage of audion T2 of electric capacity C22 and C25 and C26 respectively
Pole pipe D2 is in parallel, and outfan 3 foot of control chip U1 connects the negative pole of diode D2, and the positive pole of diode D2 meets electric capacity C14 respectively
One end, the grid of MOS audion T1, another termination input ground GND, resistance R11 and diode D3 of electric capacity C14 are in parallel, two
The negative pole of pole pipe D3 meets in-line power end Vcc, and the positive pole of diode D3 connects the positive pole of electric capacity C20, the negative pole of diode D4 respectively,
The positive pole of diode D4 connects the base stage of audion T5, and the colelctor electrode of audion T5 is connected with the negative pole of electric capacity C20 and is followed by input ground
GND；
In described High voltage output and current foldback circuit, different name end 1 foot of transformator TRF secondary windings Ls connect respectively electric capacity C1 and
One end of C7, the other end of electric capacity C1 connects the negative pole of diode D7, the positive pole of diode D8, one end of electric capacity C3, electric capacity respectively
The other end of C3 connects the negative pole of diode D9, the positive pole of diode D10 respectively, and resistance R21 is in parallel with electric capacity C28, electric capacity C5 and
C6 connects, and one end of electric capacity C6 connects one end of electric capacity C28 and C2, the positive pole of diode D7, one end of resistance R14, electric capacity respectively
The other end of C2 connects the negative pole of diode D8, the positive pole of diode D9, one end of electric capacity C4 respectively, and the other end of electric capacity C4 is respectively
Connect the negative pole of diode D10, one end of resistance R17, one end of connecting resistance R18 respectively, one end of electric capacity C5, resistance R17 another
End, one end of resistance R30 in voltage feedback circuit, another of another termination the positive high voltage outfan+HV, electric capacity C7 of resistance R18
End connects the negative pole of diode D12, the positive pole of diode D11, one end of electric capacity C9 respectively, and the other end of electric capacity C9 connects two poles respectively
The negative pole of pipe D14, the positive pole of diode D13, resistance R22 is in parallel with electric capacity C29, and electric capacity C11 and C12 connects, the one of electric capacity C12
End connect respectively one end of electric capacity C29 and C8, the negative pole of diode D11, one end of resistance R12 and R15, TRF level of transformator around
Same Name of Ends 2 foot of group Ls, the other end of electric capacity C28 with C29 is connected and is followed by output ground HGND, and the other end of electric capacity C8 connects two respectively
The negative pole of pole pipe D13, the positive pole of diode D12, one end of electric capacity C10, the other end of electric capacity C10 connects diode D14's respectively
Positive pole, one end of resistance R19, one end of electric capacity C11 one end of connecting resistance R20 and R16, the other end of resistance R19, resistance respectively
Another termination negative high voltage outfan-HV of R20, the other end of resistance R15 with R16 is connected, and resistance R32 connects with electric capacity C15, electricity
The other end respectively one end of connecting resistance R13 and R32, inverting input 6 foot of amplifier U2B of resistance R14, another of resistance R13
In-phase input end 5 foot of another termination amplifier U2B of termination internal reference end Vref, resistance R12, the output of amplifier U2B
7 feet are held to connect electric capacity C15 and one end of resistance R10 respectively, the base stage of another termination audion T4 of resistance R10, the one of resistance R9
One end of end connecting resistance R8 respectively, driving control and the source electrode of MOS audion T1 in soft starting circuit, another termination of resistance R8
Input ground GND, the other end of resistance R9 connects one end of electric capacity C16, the base stage of audion T3, the current collection of audion T3 and T4 respectively
Extremely being connected and be followed by driving voltage controling end 5 foot of control chip U1 in control and soft starting circuit, the emitter stage of audion T4 divides
It is not connected is followed by input ground GND with the other end, the emitter stage of audion T3 of electric capacity C16.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610722291.4A CN106130385A (en) | 2016-08-25 | 2016-08-25 | A kind of with the soft high accuracy Symmetrical output high-voltage power circuit opening function |
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| CN201610722291.4A CN106130385A (en) | 2016-08-25 | 2016-08-25 | A kind of with the soft high accuracy Symmetrical output high-voltage power circuit opening function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107591779A (en) * | 2017-06-07 | 2018-01-16 | 深圳市华星光电技术有限公司 | A kind of power control circuit and electronic installation |
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| CN205986664U (en) * | 2016-08-25 | 2017-02-22 | 东文高压电源（天津）股份有限公司 | Positive and negative symmetrical output high voltage power supply circuit of high accuracy with soft function that opens |
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| US7598680B2 (en) * | 2006-08-29 | 2009-10-06 | Bcd Semiconductor Manufacturing Limited | Electronic power protection circuit and applications thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107591779A (en) * | 2017-06-07 | 2018-01-16 | 深圳市华星光电技术有限公司 | A kind of power control circuit and electronic installation |
| CN107591779B (en) * | 2017-06-07 | 2019-11-26 | 深圳市华星光电技术有限公司 | A kind of power control circuit and electronic device |
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