CN106253682A - A kind of current loss suppressive portable Switching Power Supply of EMI Filtering - Google Patents
A kind of current loss suppressive portable Switching Power Supply of EMI Filtering Download PDFInfo
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- CN106253682A CN106253682A CN201610644358.7A CN201610644358A CN106253682A CN 106253682 A CN106253682 A CN 106253682A CN 201610644358 A CN201610644358 A CN 201610644358A CN 106253682 A CN106253682 A CN 106253682A
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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
- H02M3/33561—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 more than one ouput with independent control
-
- 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
- H02M1/14—Arrangements for reducing ripples from dc input or output
- H02M1/143—Arrangements for reducing ripples from dc input or output using compensating arrangements
-
- 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
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or 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
- 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
- H02M3/33592—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 having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
-
- 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
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses the portable Switching Power Supply of current loss suppressive of a kind of EMI Filtering, it is characterised in that main by control chip U2, transformator T1, transformator T2, diode rectifier U1, Zener diode D1, polar capacitor C1, resistance R2, diode D5, current loss suppression circuit, inverse-excitation type change-over circuit, electromagnetic interference filter circuit, and the high impedance voltage output circuit being connected with Same Name of Ends and the non-same polarity of transformator T2 secondary inductance coil respectively etc. form.The current loss that the present invention can effectively reduce the conduction loss of electric current and circuit is caused, and the present invention can also pulse-width be adjusted, there is saturation in the magnetic intensity that can effectively avoid the magnet assembly of the present invention, ensure that the present invention can effectively reduce self loss to electric current, can effectively improve outputting current steadily of the present invention.
Description
Technical field
The present invention relates to field of aluminum electrolysis, specifically refer to that the current loss suppressive of a kind of EMI Filtering is portable to be opened
Close power supply.
Background technology
The rise of portable Switching Power Supply and develop into modern electronics industry and be filled with one fresh blood, and through long
The portable Switching Power Supply of Time evolution become people life in use electronic product must obligato ingredient, thus,
The performance of portable Switching Power Supply the most stably becomes for the most stable important factor of the duty of electronic product.Along with
The development of electronic product, people couple, portable Switching Power Supply is also got in the requirement of the aspects such as performance, reliability, safety
Come the highest.But, existing portable Switching Power Supply exist self to the too high problem of current loss, and cause load capacity
Low；Further, existing portable Switching Power Supply there is also the problem that output electric current is unstable, thus can not meet wanting of people
Ask.
Therefore it provides one can reduce current loss, the portable Switching Power Supply that can export again stable electric current becomes
It it is the task of top priority.
Summary of the invention
It is an object of the invention to overcome existing portable Switching Power Supply too high to the loss of electric current because there is self, defeated
Go out the defect that electric current is unstable, it is provided that the portable Switching Power Supply of current loss suppressive of a kind of EMI Filtering.
The purpose of the present invention realizes by following technical scheme: the current loss suppressive of a kind of EMI Filtering is portable
Switching Power Supply, mainly by control chip U2, transformator T1, transformator T2, diode rectifier U1, limit former with transformator T2 inductance
The current loss suppression circuit that the Same Name of Ends of coil is connected, P pole exports with the positive pole of diode rectifier U1 after resistance R1
The Zener diode D1 that end is connected, N pole is connected with the VIN pin of control chip U2, positive pole is with diode rectifier U1's
The polar capacitor C1 of ground connection, one end and pole after positive pole is connected, negative pole is connected with the cathode output end of diode rectifier U1
The resistance R2 that positive pole is connected, the other end is connected with the negative pole of polar capacitor C1 of property electric capacity C1, is serially connected in diode rectification
Switch S, N pole between one of them input and the Same Name of Ends of transformator T1 secondary inductance coil of device U1 presses down with current loss
The diode D5 that circuit processed is connected, P pole is connected with the VOUT pin of control chip U2 after resistance R11, positive pole is through resistance
After R12 the P pole with diode D5 be connected, the polar capacitor C6 of minus earth, respectively with the ON/OF pin of control chip U2 and
The inverse-excitation type change-over circuit that GND pin is connected, is serially connected between the FB pin of control chip U2 and inverse-excitation type change-over circuit
Electromagnetic interference filter circuit, and the high resistant being connected with Same Name of Ends and the non-same polarity of transformator T2 secondary inductance coil respectively
Reactance voltage output circuit forms；The non-same polarity ground connection of the former limit inductance coil of described transformator T2；Described control chip U2's
VC pin is connected with the cathode output end of diode rectifier U1, its LX pin is connected with BST pin；Described diode is whole
Another input of stream device U1 is connected with the non-same polarity of transformator T1 secondary inductance coil.
Described current loss suppression circuit is by field effect transistor MOS4, audion VT7, audion VT8, and positive pole is through resistance R30
The polar capacitor C15 that emitter stage with audion VT7 is connected afterwards, negative pole is connected with the N of diode D5, positive pole is through resistance
After R29 the negative pole with polar capacitor C15 be connected, the positive pole phase of polar capacitor C16, the P pole of minus earth and polar capacitor C15
Connect, diode D13 that N pole base stage with audion VT7 after resistance R31 is connected, positive pole after resistance R32 with diode
The N pole of D13 is connected, negative pole colelctor electrode with audion VT8 after resistance R33 is connected polar capacitor C17, P pole and pole
The diode D14 that positive pole is connected, N pole is connected with the colelctor electrode of audion VT7, the P pole of property electric capacity C17 and polar capacitor
Diode D15, the N pole that the negative pole of C17 is connected, N pole is connected with the colelctor electrode of audion VT7 and the source of field effect transistor MOS4
The diode D16 that pole is connected, P pole emitter stage with audion VT7 after inductance L3 is connected, the P of one end and diode D16
The grid of the adjustable resistance R35 that pole is connected, the other end is connected with the colelctor electrode of audion VT7, positive pole and field effect transistor MOS4
The polar capacitor C18 that pole is connected, negative pole colelctor electrode with audion VT7 after resistance R36 is connected, one end and audion
The colelctor electrode of VT7 is connected, the resistance R37 of other end ground connection, negative pole base stage with audion VT8 after resistance R34 is connected,
The polar capacitor C19 that positive pole is sequentially connected with the drain electrode of field effect transistor MOS4 after adjustable resistance R38 through resistance R39, and
Positive pole is connected with the drain electrode of field effect transistor MOS4, the polar capacitor C20 of minus earth composition；The current collection of described audion VT8
Pole ground connection；The Same Name of Ends of the drain electrode of described field effect transistor MOS4 also former with transformator T2 limit inductance coil is connected.
Further, described electromagnetic interference filter circuit by field effect transistor MOS2, field effect transistor MOS3, audion VT5, three
Pole pipe VT6, negative pole drain electrode with field effect transistor MOS2 after inductance coil DL is connected, the FB pin of positive pole and control chip U2
The polar capacitor C10 being connected, negative pole negative pole with polar capacitor C10 after resistance R20 is connected, and positive pole is after resistance R21
Polar capacitor C11, the N pole being connected with the drain electrode of field effect transistor MOS2 negative pole with polar capacitor C10 after resistance R22 is connected
Connect, diode D9 that P pole emitter stage with audion VT5 after resistance R26 is connected, positive pole after resistance R24 with diode
The P pole of D9 is connected, negative pole base stage with audion VT6 after adjustable resistance R25 is connected polar capacitor C12, P pole and pole
The diode D10 that negative pole is connected, N pole is connected with the grid of field effect transistor MOS3 of property electric capacity C12, negative pole and audion
The emitter stage of VT5 be connected after the polar capacitor that is connected with the source electrode of field effect transistor MOS3 after resistance R27 of ground connection, positive pole
C13, positive pole is connected with the colelctor electrode of audion VT6, the leakage of polar capacitor C14, the P pole of minus earth and field effect transistor MOS3
Diode D11, the P pole that pole is connected, N pole is connected with the negative pole of polar capacitor C14 is connected with the colelctor electrode of audion VT6
Connect, Zener diode D12 that N pole positive pole with polar capacitor C11 after resistance R23 is connected, and one end and voltage stabilizing two pole
The N pole of pipe D12 is connected, the resistance R28 of other end ground connection composition；The negative pole of described polar capacitor C10 is also with diode D10's
P pole is connected；The colelctor electrode of described audion VT5 is also connected with the grid of field effect transistor MOS3, its base stage is also electric with polarity
The positive pole holding C13 is connected；The emitter stage of described audion VT6 is also connected with the grid of field effect transistor MOS2；Described voltage stabilizing
The N pole of diode D12 is also connected with inverse-excitation type change-over circuit.
Described inverse-excitation type change-over circuit is connected with the colelctor electrode of audion VT1 by audion VT1, audion VT2, negative pole
Connect, polar capacitor C3, P pole that positive pole is connected with the ON/OF pin of control chip U2 after resistance R4 is with polar capacitor C3's
The diode D2 that positive pole is connected, N pole is connected with the colelctor electrode of audion VT1, positive pole after resistance R3 with the P of diode D2
Pole is connected, the polar capacitor C2 of minus earth, and one end is connected with the positive pole of polar capacitor C2, the other end and audion VT2
The inductance L1 that is connected of colelctor electrode, positive pole colelctor electrode with audion VT2 after resistance R6 is connected, negative pole is after resistance R8
Polar capacitor C5, the N pole being connected with the emitter stage of audion VT2 base stage with audion VT1 after adjustable resistance R5 is connected
Connect, diode D3 that P negative pole with polar capacitor C5 after resistance R7 is connected, negative pole is connected with the emitter stage of audion VT1
Connect, polar capacitor C4 that positive pole is connected with the base stage of audion VT2, one end is connected with the negative pole of polar capacitor C4, another
The resistance R9 that is connected with the positive pole of polar capacitor C4 of end, and P pole is connected with the negative pole of polar capacitor C5, N pole is through adjustable
The diode D4 composition that after resistance R10, emitter stage with audion VT1 is connected；The N pole of described diode D3 also with audion
The colelctor electrode of VT2 is connected；The adjustable end of described adjustable resistance R10 is connected with the N pole of Zener diode D12；Described two poles
The N pole of pipe D4 be connected with the GND pin of control chip U2 after ground connection.
Described high impedance voltage output circuit is by field effect transistor MOS1, audion VT3, audion VT4, positive pole and transformator
The polarity that the non-same polarity of T2 secondary inductance coil is connected, negative pole emitter stage with audion VT3 after resistance R14 is connected
Electric capacity C7, P pole negative pole with polar capacitor C7 after resistance R13 is connected, N pole is connected with the emitter stage of audion VT3
Diode D6, P pole is connected with the negative pole of polar capacitor C7, N pole base stage with audion VT3 after resistance R16 is connected
Diode D7, positive pole is connected with the Same Name of Ends of transformator T2 secondary inductance coil, the drain electrode phase of negative pole and field effect transistor MOS1
The polar capacitor C8 of ground connection after connection, positive pole emitter stage with audion VT3 after resistance R15 is connected, negative pole is through resistance R17
The polar capacitor C9 that colelctor electrode with audion VT3 is connected afterwards, one end is connected with the negative pole of polar capacitor C9, the other end with
The adjustable resistance R18 that the emitter stage of audion VT4 is connected, and P pole base stage with audion VT4 after resistance R19 is connected
Connect, diode D8 that N pole is connected with the grid of field effect transistor MOS1 after inductance L2 composition；The grid of described field effect transistor MOS1
Pole also has the colelctor electrode of audion VT4 to be connected, its source electrode is connected with the colelctor electrode of audion VT3；The N of described diode D8
The grid of pole and field effect transistor MOS1 is collectively forming the outfan of high impedance voltage output circuit.
For the practical effect of the present invention, described process chip U2 the most preferentially have employed the integrated chip of MAX5035
Realize.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) current loss that the present invention can effectively reduce the conduction loss of electric current and circuit is caused, and the present invention
Pulse-width can also be adjusted, can effectively avoid the magnetic intensity of the magnet assembly of the present invention that saturation occurs, from
And ensure that the present invention can effectively reduce self loss to electric current, can effectively improve load capacity of the present invention, well
Meet the requirement of people.
(2) power consumption of the own loss time present invention can effectively reduce stable state, and can be high to moment when starting
Electric current suppresses, and effectively reduces current loss during startup, ensures that the present invention can reduce self to electric current
Loss.
(3) the strong electromagnetic electric wave in circuit can be eliminated or suppress by the present invention, makes the current waveform in circuit
Held stationary, can effectively reduce the current loss in circuit, thus improve the load capacity of the present invention.
(4) unusual fluctuations of output electric current can be suppressed by the present invention, makes the intensity of output electric current keep stable, thus
Improve the present invention and export the stability of electric current.
(5) the process chip U2 of the present invention the most preferentially have employed the integrated chip of MAX5035 and realizes, this chip and periphery electricity
Road combines, and can effectively guarantee that the present invention reduces self reliability to current loss.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the electromagnetic interference filter circuit of the present invention.
Fig. 3 is the electrical block diagram of the current loss suppression circuit of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to
This.
Embodiment
As it is shown in figure 1, the present invention is mainly by control chip U2, transformator T1, transformator T2, diode rectifier U1, electricity
Resistance R1, resistance R2, resistance R11, resistance R12, switch S, polar capacitor C1, polar capacitor C6, Zener diode D1, diode
D5, current loss suppression circuit, electromagnetic interference filter circuit, inverse-excitation type change-over circuit, and high impedance voltage output circuit group
Become.
During connection, the P pole of Zener diode D1 cathode output end with diode rectifier U1 after resistance R1 is connected,
N pole is connected with the VIN pin of control chip U2.The positive pole of polar capacitor C1 is connected with the positive pole of diode rectifier U1,
Negative pole be connected with the cathode output end of diode rectifier U1 after ground connection.The positive pole phase of one end of resistance R2 and polar capacitor C1
Connecting, the other end is connected with the negative pole of polar capacitor C1.
Meanwhile, switch S is serially connected in one of them input and the transformator T1 secondary inductance coil of diode rectifier U1
Same Name of Ends between.The N pole of diode D5 is connected with current loss suppression circuit, P pole after resistance R11 with control chip U2
VOUT pin be connected.The positive pole of polar capacitor C6 P pole with diode D5 after resistance R12 is connected, minus earth.Electricity
The Same Name of Ends of stream loss suppression circuit limit former with transformator T2 inductance coil is connected.Inverse-excitation type change-over circuit respectively with control core
The ON/OF pin of sheet U2 is connected with GND pin.Electromagnetic interference filter circuit is serially connected in FB pin and the flyback of control chip U2
Between formula change-over circuit.High impedance voltage output circuit respectively with Same Name of Ends and the non-same polarity of transformator T2 secondary inductance coil
It is connected.
The non-same polarity ground connection of the former limit inductance coil of described transformator T2；The VC pin of described control chip U2 and two poles
The cathode output end of pipe commutator U1 is connected, and its LX pin is connected with BST pin；Another of described diode rectifier U1
Individual input is connected with the non-same polarity of transformator T1 secondary inductance coil.During enforcement, described transformator T1 former limit inductance
The Same Name of Ends of coil is collectively forming the input of the present invention and is connected with civil power with non-same polarity.Actual for the present invention makes
By effect, described process chip U2 the most preferentially have employed the integrated chip of MAX5035 and realizes.
Further, described inverse-excitation type change-over circuit is by audion VT1, audion VT2, resistance R3, resistance R4, adjustable electric
Resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, adjustable resistance R10, polar capacitor C2, polar capacitor C3, polar capacitor
C4, polar capacitor C5, inductance L1, diode D2, diode D3, and diode D4 form.
During connection, the negative pole of polar capacitor C3 is connected with the colelctor electrode of audion VT1, positive pole after resistance R4 with control
The ON/OF pin of chip U2 is connected.The P pole of diode D2 is connected with the positive pole of polar capacitor C3, N pole and audion VT1
Colelctor electrode be connected.The positive pole of polar capacitor C2 P pole with diode D2 after resistance R3 is connected, minus earth.Inductance
One end of L1 is connected with the positive pole of polar capacitor C2, and the other end is connected with the colelctor electrode of audion VT2.
Wherein, the positive pole of polar capacitor C5 colelctor electrode with audion VT2 after resistance R6 is connected, and negative pole is through resistance R8
Emitter stage with audion VT2 is connected afterwards.The N pole of diode D3 base stage with audion VT1 after adjustable resistance R5 is connected
Connecing, P negative pole with polar capacitor C5 after resistance R7 is connected.
Meanwhile, the negative pole of polar capacitor C4 is connected with the emitter stage of audion VT1, positive pole and the base stage of audion VT2
It is connected.One end of resistance R9 is connected with the negative pole of polar capacitor C4, and the other end is connected with the positive pole of polar capacitor C4.Two
The P pole of pole pipe D4 is connected with the negative pole of polar capacitor C5, and N pole emitter stage with audion VT1 after adjustable resistance R10 is connected
Connect.
The N pole of described diode D3 also colelctor electrode with audion VT2 is connected；The adjustable end of described adjustable resistance R10
It is connected with the N pole of Zener diode D12；The N pole of described diode D4 is connected with the GND pin of control chip U2 and is followed by
Ground.
Further, described high impedance voltage output circuit by field effect transistor MOS1, audion VT3, audion VT4,
Resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, adjustable resistance R18, resistance R19, inductance L2, polar capacitor
C7, polar capacitor C8, polar capacitor C9, diode D6, diode D7, and diode D8 form.
During connection, the positive pole of polar capacitor C7 is connected with the non-same polarity of transformator T2 secondary inductance coil, negative pole warp
After resistance R14, the emitter stage with audion VT3 is connected.The P pole of diode D6 after resistance R13 with the negative pole of polar capacitor C7
Being connected, N pole is connected with the emitter stage of audion VT3.The P pole of diode D7 is connected with the negative pole of polar capacitor C7, N pole
After resistance R16, the base stage with audion VT3 is connected.The positive pole of polar capacitor C8 is same with transformator T2 secondary inductance coil
Name end be connected, negative pole be connected with the drain electrode of field effect transistor MOS1 after ground connection.
Meanwhile, the positive pole of polar capacitor C9 emitter stage with audion VT3 after resistance R15 is connected, and negative pole is through resistance
After R17, the colelctor electrode with audion VT3 is connected.One end of adjustable resistance R18 is connected with the negative pole of polar capacitor C9, another
End is connected with the emitter stage of audion VT4.The P pole of diode D8 base stage with audion VT4 after resistance R19 is connected, N
Pole grid with field effect transistor MOS1 after inductance L2 is connected.
The grid of described field effect transistor MOS1 also has the colelctor electrode of audion VT4 to be connected, and its source electrode is with audion VT3's
Colelctor electrode is connected；The N pole of described diode D8 and the grid of field effect transistor MOS1 are collectively forming high impedance voltage output circuit
Outfan.During enforcement, the outfan of this high impedance voltage output circuit is then connected with electronic product.
As in figure 2 it is shown, described electromagnetic interference filter circuit is by field effect transistor MOS2, field effect transistor MOS3, audion VT5,
Audion VT6, resistance R20, resistance R21, resistance R22, resistance R23, resistance R24, adjustable resistance R25, resistance R26, resistance
R27, resistance R28, inductance coil DL, polar capacitor C10, polar capacitor C11, polar capacitor C12, polar capacitor C13, polarity electricity
Hold C14, diode D9, diode D10, diode D11, and Zener diode D12 composition.
During connection, the drain electrode with field effect transistor MOS2 after inductance coil DL of the negative pole of polar capacitor C10 is connected, positive pole
It is connected with the FB pin of control chip U2.The negative pole of polar capacitor C11 after resistance R20 with the negative pole phase of polar capacitor C10
Connecting, positive pole drain electrode with field effect transistor MOS2 after resistance R21 is connected.The N pole of diode D9 after resistance R22 with polarity
The negative pole of electric capacity C10 is connected, and P pole emitter stage with audion VT5 after resistance R26 is connected.The positive pole of polar capacitor C12
After resistance R24, the P pole with diode D9 is connected, and negative pole base stage with audion VT6 after adjustable resistance R25 is connected.
Meanwhile, the P pole of diode D10 is connected with the negative pole of polar capacitor C12, N pole and the grid of field effect transistor MOS3
It is connected.The negative pole of polar capacitor C13 be connected with the emitter stage of audion VT5 after ground connection, positive pole after resistance R27 with field imitate
Should the source electrode of pipe MOS3 be connected.The positive pole of polar capacitor C14 is connected with the colelctor electrode of audion VT6, minus earth.Two poles
The P pole of pipe D11 is connected with the drain electrode of field effect transistor MOS3, and N pole is connected with the negative pole of polar capacitor C14.Zener diode
The P pole of D12 is connected with the colelctor electrode of audion VT6, and N pole positive pole with polar capacitor C11 after resistance R23 is connected.Electricity
One end of resistance R28 is connected with the N pole of Zener diode D12, other end ground connection.
The negative pole of described polar capacitor C10 is also connected with the P pole of diode D10；The colelctor electrode of described audion VT5 is also
Being connected with the grid of field effect transistor MOS3, its base stage also positive pole with polar capacitor C13 is connected；Described audion VT6's
Emitter stage is also connected with the grid of field effect transistor MOS2；The N pole of described Zener diode D12 also with inverse-excitation type change-over circuit phase
Connect.
As it is shown on figure 3, described current loss suppression circuit is by field effect transistor MOS4, audion VT7, audion VT8, resistance
R29, resistance R30, resistance R31, resistance R32, resistance R33, resistance R34, adjustable resistance R35, resistance R36, resistance R37, adjustable
Resistance R38, resistance R39, polar capacitor C15, polar capacitor C16, polar capacitor C17, polar capacitor C18, polar capacitor C19,
Polar capacitor C20, inductance L3, diode D13, diode D14, diode D15, and diode D16 form.
During connection, the positive pole of polar capacitor C15 emitter stage with audion VT7 after resistance R30 is connected, negative pole and two
The N of pole pipe D5 is connected.The positive pole of polar capacitor C16 negative pole with polar capacitor C15 after resistance R29 is connected, and negative pole connects
Ground.The P pole of diode D13 is connected with the positive pole of polar capacitor C15, N pole after resistance R31 with the base stage phase of audion VT7
Connect.The positive pole of polar capacitor C17 N pole with diode D13 after resistance R32 is connected, negative pole after resistance R33 with three poles
The colelctor electrode of pipe VT8 is connected.
Wherein, the P pole of diode D14 is connected with the positive pole of polar capacitor C17, the colelctor electrode phase of N pole and audion VT7
Connect.The P pole of diode D15 is connected with the negative pole of polar capacitor C17, and N pole is connected with the colelctor electrode of audion VT7.Two
The N pole of pole pipe D16 is connected with the source electrode of field effect transistor MOS4, and P pole emitter stage with audion VT7 after inductance L3 is connected
Connect.One end of adjustable resistance R35 is connected with the P pole of diode D16, and the other end is connected with the colelctor electrode of audion VT7.Pole
The property positive pole of electric capacity C18 is connected with the grid of field effect transistor MOS4, negative pole after resistance R36 with the colelctor electrode of audion VT7
It is connected.
Meanwhile, one end of resistance R37 is connected with the colelctor electrode of audion VT7, other end ground connection.Polar capacitor C19's
Negative pole base stage with audion VT8 after resistance R34 is connected, and positive pole is sequentially imitated with field after resistance R39 and adjustable resistance R38
Should the drain electrode of pipe MOS4 be connected.The positive pole of polar capacitor C20 is connected with the drain electrode of field effect transistor MOS4, minus earth.Institute
State the grounded collector of audion VT8；The drain electrode of described field effect transistor MOS4 also former with transformator T2 limit inductance coil of the same name
End is connected.During enforcement, resistance R29 in described current loss suppression circuit～resistance R34 all uses the resistance of 5 Ω, adjustable
Resistance R35 and adjustable resistance R38 then can regulate according to the value of produced high electric current when starting accordingly, makes circuit to electricity
The loss of stream is preferably minimized.
During operation, the inverse-excitation type change-over circuit of the present invention can effectively reduce the conduction loss of electric current and circuit caused
Current loss, and this circuit can also pulse-width be adjusted, and can effectively avoid the magnetic of the magnet assembly of the present invention
There is saturation in intensity, ensures that the present invention can effectively reduce self loss to electric current, is effectively improved the present invention
Load capacity.Meanwhile, the unusual fluctuations of output electric current can be suppressed by the high impedance voltage output circuit of the present invention, makes defeated
The intensity going out electric current keeps stable, thus improves the present invention and export the stability of electric current, well meets the requirement of people.Its
In, the power consumption of the own loss time current loss suppression circuit of the present invention can effectively reduce stable state, and can be to startup
Time instantaneous high current suppress, effectively reduce current loss during startup, ensure that the present invention can reduce from
The body loss to electric current.
Meanwhile, the strong electromagnetic electric wave in circuit can be eliminated or press down by the electromagnetic interference filter circuit of the present invention
System, makes the current waveform held stationary in circuit, can effectively reduce the current loss in circuit, thus improve the present invention's
Load capacity.The process chip U2 of the present invention the most preferentially uses has overvoltage protection, overcurrent protection and steady performance
The integrated chip of MAX5035 realizes, and this chip combines with peripheral circuit, can effectively guarantee that the present invention reduces self to electric current
The reliability of loss.
As it has been described above, just can well realize the present invention.
Claims (6)
1. the portable Switching Power Supply of current loss suppressive of an EMI Filtering, it is characterised in that mainly by controlling core
Sheet U2, transformator T1, transformator T2, diode rectifier U1, the Same Name of Ends of limit former with transformator T2 inductance coil is connected
Current loss suppression circuit, P pole cathode output end with diode rectifier U1 after resistance R1 is connected, N pole with control core
The Zener diode D1 that the VIN pin of sheet U2 is connected, positive pole is connected with the positive pole of diode rectifier U1, negative pole and two poles
The cathode output end of pipe commutator U1 be connected after the polar capacitor C1 of ground connection, one end is connected with the positive pole of polar capacitor C1,
The resistance R2 that the other end is connected with the negative pole of polar capacitor C1, be serially connected in one of them input of diode rectifier U1 with
Switch S, N pole between the Same Name of Ends of transformator T1 secondary inductance coil is connected with current loss suppression circuit, P pole is through resistance
The diode D5 being connected with the VOUT pin of control chip U2 after R11, positive pole after resistance R12 with the P pole phase of diode D5
Connection, the polar capacitor C6 of minus earth, the inverse-excitation type being connected with ON/OF pin and the GND pin of control chip U2 respectively
Change-over circuit, is serially connected in the electromagnetic interference filter circuit between the FB pin of control chip U2 and inverse-excitation type change-over circuit, and
The high impedance voltage output circuit composition being connected with Same Name of Ends and the non-same polarity of transformator T2 secondary inductance coil respectively；Institute
State the non-same polarity ground connection of the former limit inductance coil of transformator T2；The VC pin of described control chip U2 and diode rectifier U1
Cathode output end be connected, its LX pin is connected with BST pin；Another input of described diode rectifier U1 with
The non-same polarity of transformator T1 secondary inductance coil is connected.
The portable Switching Power Supply of current loss suppressive of a kind of EMI Filtering the most according to claim 1, it is special
Levying and be, described current loss suppression circuit is by field effect transistor MOS4, audion VT7, audion VT8, and positive pole is after resistance R30
Be connected with the emitter stage of audion VT7, polar capacitor C15 that negative pole is connected with the N of diode D5, positive pole is through resistance R29
Negative pole with polar capacitor C15 is connected afterwards, polar capacitor C16, the P pole of minus earth is connected with the positive pole of polar capacitor C15
Connect, diode D13 that N pole base stage with audion VT7 after resistance R31 is connected, positive pole after resistance R32 with diode
The N pole of D13 is connected, negative pole colelctor electrode with audion VT8 after resistance R33 is connected polar capacitor C17, P pole and pole
The diode D14 that positive pole is connected, N pole is connected with the colelctor electrode of audion VT7, the P pole of property electric capacity C17 and polar capacitor
Diode D15, the N pole that the negative pole of C17 is connected, N pole is connected with the colelctor electrode of audion VT7 and the source of field effect transistor MOS4
The diode D16 that pole is connected, P pole emitter stage with audion VT7 after inductance L3 is connected, the P of one end and diode D16
The grid of the adjustable resistance R35 that pole is connected, the other end is connected with the colelctor electrode of audion VT7, positive pole and field effect transistor MOS4
The polar capacitor C18 that pole is connected, negative pole colelctor electrode with audion VT7 after resistance R36 is connected, one end and audion
The colelctor electrode of VT7 is connected, the resistance R37 of other end ground connection, negative pole base stage with audion VT8 after resistance R34 is connected,
The polar capacitor C19 that positive pole is sequentially connected with the drain electrode of field effect transistor MOS4 after adjustable resistance R38 through resistance R39, and
Positive pole is connected with the drain electrode of field effect transistor MOS4, the polar capacitor C20 of minus earth composition；The current collection of described audion VT8
Pole ground connection；The Same Name of Ends of the drain electrode of described field effect transistor MOS4 also former with transformator T2 limit inductance coil is connected.
The portable Switching Power Supply of current loss suppressive of a kind of EMI Filtering the most according to claim 2, it is special
Levying and be, described electromagnetic interference filter circuit, by field effect transistor MOS2, field effect transistor MOS3, audion VT5, audion VT6, is born
Pole that drain electrode is connected, positive pole is connected with the FB pin of control chip U2 with field effect transistor MOS2 after inductance coil DL, pole
Property electric capacity C10, negative pole negative pole with polar capacitor C10 after resistance R20 is connected, positive pole after resistance R21 with field effect transistor
Polar capacitor C11, the N pole that the drain electrode of MOS2 is connected negative pole with polar capacitor C10 after resistance R22 is connected, P pole is through electricity
The diode D9 that is connected with the emitter stage of audion VT5 after resistance R26, positive pole P with diode D9 after resistance R24 are extremely connected
Connect, polar capacitor C12, P pole that negative pole base stage with audion VT6 after adjustable resistance R25 is connected is with polar capacitor C12's
The diode D10 that negative pole is connected, N pole is connected with the grid of field effect transistor MOS3, the emitter stage phase of negative pole and audion VT5
The polar capacitor C13 that after connection, ground connection, positive pole are connected with the source electrode of field effect transistor MOS3 after resistance R27, positive pole and three poles
The colelctor electrode of pipe VT6 is connected, polar capacitor C14, the P pole of minus earth is connected with the drain electrode of field effect transistor MOS3, N pole with
Diode D11, the P pole that the negative pole of polar capacitor C14 is connected is connected with the colelctor electrode of audion VT6, N pole is through resistance R23
The Zener diode D12 that positive pole with polar capacitor C11 is connected afterwards, and one end is extremely connected with the N of Zener diode D12
Connect, the resistance R28 of other end ground connection forms；The negative pole of described polar capacitor C10 is also connected with the P pole of diode D10；Described
The colelctor electrode of audion VT5 is also connected with the grid of field effect transistor MOS3, its base stage also positive pole with polar capacitor C13 is connected
Connect；The emitter stage of described audion VT6 is also connected with the grid of field effect transistor MOS2；The N pole of described Zener diode D12 is also
It is connected with inverse-excitation type change-over circuit.
The portable Switching Power Supply of current loss suppressive of a kind of EMI Filtering the most according to claim 3, it is special
Levy and be, described inverse-excitation type change-over circuit by audion VT1, audion VT2, negative pole is connected with the colelctor electrode of audion VT1,
Polar capacitor C3, the P pole that positive pole is connected with the ON/OF pin of control chip U2 after resistance R4 and the positive pole of polar capacitor C3
Be connected, diode D2 that N pole is connected with the colelctor electrode of audion VT1, positive pole after resistance R3 with the P pole phase of diode D2
Connect, the polar capacitor C2 of minus earth, one end is connected with the positive pole of polar capacitor C2, the collection of the other end and audion VT2
The inductance L1 that electrode is connected, positive pole colelctor electrode with audion VT2 after resistance R6 is connected, negative pole after resistance R8 with three
Polar capacitor C5, the N pole that the emitter stage of pole pipe VT2 is connected base stage with audion VT1 after adjustable resistance R5 is connected, P
The diode D3 that negative pole with polar capacitor C5 is connected after resistance R7, negative pole is connected with the emitter stage of audion VT1, just
The polar capacitor C4 that pole is connected with the base stage of audion VT2, one end is connected with the negative pole of polar capacitor C4, the other end and pole
The resistance R9 that the positive pole of property electric capacity C4 is connected, and P pole is connected with the negative pole of polar capacitor C5, N pole is through adjustable resistance R10
The diode D4 composition that emitter stage with audion VT1 is connected afterwards；The N pole of described diode D3 also with the collection of audion VT2
Electrode is connected；The adjustable end of described adjustable resistance R10 is connected with the N pole of Zener diode D12；The N of described diode D4
Pole be connected with the GND pin of control chip U2 after ground connection.
The portable Switching Power Supply of current loss suppressive of a kind of EMI Filtering the most according to claim 4, it is special
Levying and be, described high impedance voltage output circuit is by field effect transistor MOS1, audion VT3, audion VT4, positive pole and transformator
The polarity that the non-same polarity of T2 secondary inductance coil is connected, negative pole emitter stage with audion VT3 after resistance R14 is connected
Electric capacity C7, P pole negative pole with polar capacitor C7 after resistance R13 is connected, N pole is connected with the emitter stage of audion VT3
Diode D6, P pole is connected with the negative pole of polar capacitor C7, N pole base stage with audion VT3 after resistance R16 is connected
Diode D7, positive pole is connected with the Same Name of Ends of transformator T2 secondary inductance coil, the drain electrode phase of negative pole and field effect transistor MOS1
The polar capacitor C8 of ground connection after connection, positive pole emitter stage with audion VT3 after resistance R15 is connected, negative pole is through resistance R17
The polar capacitor C9 that colelctor electrode with audion VT3 is connected afterwards, one end is connected with the negative pole of polar capacitor C9, the other end with
The adjustable resistance R18 that the emitter stage of audion VT4 is connected, and P pole base stage with audion VT4 after resistance R19 is connected
Connect, diode D8 that N pole is connected with the grid of field effect transistor MOS1 after inductance L2 composition；The grid of described field effect transistor MOS1
Pole also has the colelctor electrode of audion VT4 to be connected, its source electrode is connected with the colelctor electrode of audion VT3；The N of described diode D8
The grid of pole and field effect transistor MOS1 is collectively forming the outfan of high impedance voltage output circuit.
The portable Switching Power Supply of current loss suppressive of a kind of EMI Filtering the most according to claim 5, it is special
Levying and be, described control chip U2 is the integrated chip of MAX5035.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610644358.7A CN106253682A (en) | 2016-08-08 | 2016-08-08 | A kind of current loss suppressive portable Switching Power Supply of EMI Filtering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610644358.7A CN106253682A (en) | 2016-08-08 | 2016-08-08 | A kind of current loss suppressive portable Switching Power Supply of EMI Filtering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106253682A true CN106253682A (en) | 2016-12-21 |
Family
ID=58078463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610644358.7A Pending CN106253682A (en) | 2016-08-08 | 2016-08-08 | A kind of current loss suppressive portable Switching Power Supply of EMI Filtering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106253682A (en) |
-
2016
- 2016-08-08 CN CN201610644358.7A patent/CN106253682A/en active Pending
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Application publication date: 20161221 |
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