CN106253683A - A kind of current loss portable Switching Power Supply of suppressive low-loss - Google Patents
A kind of current loss portable Switching Power Supply of suppressive low-loss Download PDFInfo
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- CN106253683A CN106253683A CN201610644629.9A CN201610644629A CN106253683A CN 106253683 A CN106253683 A CN 106253683A CN 201610644629 A CN201610644629 A CN 201610644629A CN 106253683 A CN106253683 A CN 106253683A
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Classifications
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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
-
- 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
-
- 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)
- Amplifiers (AREA)
Abstract
The invention discloses a kind of current loss portable Switching Power Supply of suppressive low-loss, 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, and the composition such as 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.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 a kind of EMI Filtering portable Switching Power Supply of type low-loss.
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 a kind of current loss portable Switching Power Supply of suppressive low-loss.
The purpose of the present invention realizes by following technical scheme: a kind of current loss suppressive low-loss portable switch electricity
Source, mainly by control chip U2, transformator T1, transformator T2, diode rectifier U1, limit former with transformator T2 inductance coil
The current loss suppression circuit that Same Name of Ends is connected, P pole cathode output end with diode rectifier U1 after resistance R1 is connected
Connect, Zener diode D1 that N pole is connected with the VIN pin of control chip U2, the positive pole phase of positive pole and diode rectifier U1
Connect, negative pole be connected with the cathode output end of diode rectifier U1 after the polar capacitor C1 of ground connection, one end and polar capacitor
The resistance R2 that the positive pole of C1 is connected, the other end is connected with the negative pole of polar capacitor C1, is serially connected in diode rectifier U1's
Switch S, N pole between the Same Name of Ends of one of them input and transformator T1 secondary inductance coil and current loss suppression circuit
Be connected, diode D5 that P pole is connected with the VOUT pin of control chip U2 after resistance R11, positive pole after resistance R12 with
The P pole of diode D5 is connected, the polar capacitor C6 of minus earth, respectively with ON/OF pin and the FB pin of control chip U2
And the inverse-excitation type change-over circuit that GND pin is connected, and respectively with the Same Name of Ends of transformator T2 secondary inductance coil and non-
The high impedance voltage output circuit composition that Same Name of Ends is connected；The non-same polarity of the former limit inductance coil of described transformator T2 connects
Ground；The VC pin of described control chip U2 is connected with the cathode output end of diode rectifier U1, its LX pin and BST pin
It is connected；Another input of described diode rectifier U1 is connected with the non-same polarity of transformator T1 secondary inductance coil
Connect.
Further, described current loss suppression circuit is by field effect transistor MOS2, audion VT5, audion VT6, positive pole
The polar capacitor C10 that emitter stage with audion VT5 is connected after resistance R21, negative pole is connected with the N of diode D5, just
Pole negative pole with polar capacitor C10 after resistance R20 is connected, polar capacitor C11, P pole and the polar capacitor C10 of minus earth
The diode D9 that positive pole is connected, N pole base stage with audion VT5 after resistance R22 is connected, positive pole is after resistance R23
Be connected with the N pole of diode D9, polar capacitor C12, P that negative pole colelctor electrode with audion VT6 after resistance R24 is connected
Pole is connected with the positive pole of polar capacitor C12, N pole is connected with the colelctor electrode of audion VT5 diode D10, P pole and polarity
Diode D11, the N pole that the negative pole of electric capacity C12 is connected, N pole is connected with the colelctor electrode of audion VT5 and field effect transistor MOS2
The diode D12 that source electrode is connected, P pole emitter stage with audion VT5 after inductance L3 is connected, one end and diode
The adjustable resistance R26 that the P pole of D12 is connected, the other end is connected with the colelctor electrode of audion VT5, positive pole and field effect transistor
The polar capacitor C13 that the grid of MOS2 is connected, negative pole colelctor electrode with audion VT5 after resistance R27 is connected, one end with
The colelctor electrode of audion VT5 is connected, the resistance R28 of other end ground connection, negative pole after resistance R25 with the base stage of audion VT6
Be connected, polar capacitor that positive pole is sequentially connected with the drain electrode of field effect transistor MOS2 after adjustable resistance R29 through resistance R30
C14, and positive pole is connected with the drain electrode of field effect transistor MOS2, the polar capacitor C15 of minus earth composition；Described audion
The grounded collector of VT6；The Same Name of Ends of the drain electrode of described field effect transistor MOS2 also former with transformator T2 limit inductance coil is connected.
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 FB pin of control chip U2；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) 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.
(4) 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 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, inverse-excitation type change-over circuit, and high impedance voltage output circuit composition.
During connection, the Same Name of Ends of current loss suppression circuit limit former with transformator T2 inductance coil is connected.Voltage stabilizing two pole
The P pole of pipe D1 cathode output end with diode rectifier U1 after resistance R1 is connected, the VIN pipe of N pole and control chip U2
Foot is connected.The positive pole of polar capacitor C1 is connected with the positive pole of diode rectifier U1, and negative pole is with diode rectifier U1's
Cathode output end be connected after ground connection.One end of resistance R2 is connected with the positive pole of polar capacitor C1, the other end and polar capacitor
The negative pole of C1 is connected.
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.Instead
Swash formula change-over circuit to be connected with the ON/OF pin of control chip U2 and FB pin and GND pin respectively.High impedance voltage is defeated
Go out circuit to be connected with Same Name of Ends and the non-same polarity of transformator T2 secondary inductance coil respectively.
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 FB pin of control chip U2；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 current loss suppression circuit is by field effect transistor MOS2, audion VT5, audion VT6, resistance
R20, resistance R21, resistance R22, resistance R23, resistance R24, resistance R25, adjustable resistance R26, resistance R27, resistance R28, adjustable
Resistance R29, resistance R30, polar capacitor C10, polar capacitor C11, polar capacitor C12, polar capacitor C13, polar capacitor C14,
Polar capacitor C15, inductance L3, diode D9, diode D10, diode D11, and diode D12 form.
During connection, the positive pole of polar capacitor C10 emitter stage with audion VT5 after resistance R21 is connected, negative pole and two
The N of pole pipe D5 is connected.The positive pole of polar capacitor C11 negative pole with polar capacitor C10 after resistance R20 is connected, and negative pole connects
Ground.The P pole of diode D9 is connected with the positive pole of polar capacitor C10, and N pole base stage with audion VT5 after resistance R22 is connected
Connect.The positive pole of polar capacitor C12 N pole with diode D9 after resistance R23 is connected, negative pole after resistance R24 with audion
The colelctor electrode of VT6 is connected.
Wherein, the P pole of diode D10 is connected with the positive pole of polar capacitor C12, the colelctor electrode phase of N pole and audion VT5
Connect.The P pole of diode D11 is connected with the negative pole of polar capacitor C12, and N pole is connected with the colelctor electrode of audion VT5.Two
The N pole of pole pipe D12 is connected with the source electrode of field effect transistor MOS2, and P pole emitter stage with audion VT5 after inductance L3 is connected
Connect.One end of adjustable resistance R26 is connected with the P pole of diode D12, and the other end is connected with the colelctor electrode of audion VT5.Pole
The property positive pole of electric capacity C13 is connected with the grid of field effect transistor MOS2, negative pole after resistance R27 with the colelctor electrode of audion VT5
It is connected.
Meanwhile, one end of resistance R28 is connected with the colelctor electrode of audion VT5, other end ground connection.Polar capacitor C14's
Negative pole base stage with audion VT6 after resistance R25 is connected, and positive pole is sequentially imitated with field after resistance R30 and adjustable resistance R29
Should the drain electrode of pipe MOS2 be connected.The positive pole of polar capacitor C15 is connected with the drain electrode of field effect transistor MOS2, minus earth.Institute
State the grounded collector of audion VT6；The drain electrode of described field effect transistor MOS2 also former with transformator T2 limit inductance coil of the same name
End is connected.During enforcement, resistance R20 in described current loss suppression circuit～resistance R25 all uses the resistance of 5 Ω, adjustable
Resistance R26 and adjustable resistance R29 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.
Meanwhile, the power consumption of the own loss time current loss suppression circuit of the present invention can effectively reduce stable state, and
And instantaneous high current when starting can be suppressed, effectively reduce current loss during startup, ensure that this
Bright can reduce self loss to electric current.The process chip U2 of the present invention the most preferentially use have overvoltage protection, overcurrent protection and
The integrated chip of MAX5035 of steady performance realizes, and this chip combines with peripheral circuit, can effectively guarantee this
Publicly price-reduction self reliability to current loss low.
As it has been described above, just can well realize the present invention.
Claims (5)
1. the current loss portable Switching Power Supply of suppressive low-loss, it is characterised in that main by control chip U2, transformation
Device T1, transformator T2, diode rectifier U1, the current loss that the Same Name of Ends of limit former with transformator T2 inductance coil is connected presses down
Circuit processed, P pole cathode output end with diode rectifier U1 after resistance R1 is connected, the VIN pipe of N pole and control chip U2
The Zener diode D1 that foot is connected, positive pole is connected with the positive pole of diode rectifier U1, negative pole and diode rectifier U1
Cathode output end be connected after the polar capacitor C1 of ground connection, one end is connected with the positive pole of polar capacitor C1, the other end and pole
Property electric capacity C1 the resistance R2 that is connected of negative pole, one of them input being serially connected in diode rectifier U1 is secondary with transformator T1
Switch S, N pole between the Same Name of Ends of limit inductance coil is connected with current loss suppression circuit, P pole after resistance R11 with control
The diode D5 that the VOUT pin of coremaking sheet U2 is connected, positive pole P pole with diode D5 after resistance R12 is connected, negative pole
The polar capacitor C6 of ground connection, the inverse-excitation type being connected with the ON/OF pin of control chip U2 and FB pin and GND pin respectively
Change-over circuit, and defeated with the high impedance voltage that the Same Name of Ends of transformator T2 secondary inductance coil and non-same polarity are connected respectively
Go out circuit composition；The non-same polarity ground connection of the former limit inductance coil of described transformator T2；The VC pin of described control chip U2 with
The cathode output end of diode rectifier U1 is connected, its LX pin is connected with BST pin；Described diode rectifier U1's
Another input is connected with the non-same polarity of transformator T1 secondary inductance coil.
A kind of current loss portable Switching Power Supply of suppressive low-loss the most according to claim 1, it is characterised in that institute
State current loss suppression circuit by field effect transistor MOS2, audion VT5, audion VT6, positive pole after resistance R21 with audion
The polar capacitor C10 that the emitter stage of VT5 is connected, negative pole is connected with the N of diode D5, positive pole after resistance R20 with polarity
The negative pole of electric capacity C10 is connected, polar capacitor C11, the P pole of minus earth is connected with the positive pole of polar capacitor C10, N pole warp
The diode D9 that after resistance R22, base stage with audion VT5 is connected, positive pole N with diode D9 after resistance R23 are extremely connected
Connect, polar capacitor C12, P pole that negative pole colelctor electrode with audion VT6 after resistance R24 is connected with polar capacitor C12 just
Diode D10, the P pole that pole is connected, N pole is connected with the colelctor electrode of audion VT5 is connected with the negative pole of polar capacitor C12
Connect, diode D11, N pole that N pole is connected with the colelctor electrode of audion VT5 is connected with the source electrode of field effect transistor MOS2, P pole
The diode D12 that emitter stage with audion VT5 is connected after inductance L3, one end is connected, separately with the P pole of diode D12
The adjustable resistance R26 that one end is connected with the colelctor electrode of audion VT5, positive pole is connected with the grid of field effect transistor MOS2, bears
The polar capacitor C13 that pole colelctor electrode with audion VT5 after resistance R27 is connected, the colelctor electrode phase of one end and audion VT5
Connect, the resistance R28 of other end ground connection, negative pole base stage with audion VT6 after resistance R25 is connected, positive pole is sequentially through electricity
The polar capacitor C14 that is connected with the drain electrode of field effect transistor MOS2 after resistance R30 and adjustable resistance R29, and positive pole and field effect
The drain electrode of pipe MOS2 is connected, the polar capacitor C15 of minus earth composition；The grounded collector of described audion VT6；Described field
The Same Name of Ends of the drain electrode of effect pipe MOS2 also former with transformator T2 limit inductance coil is connected.
A kind of current loss portable Switching Power Supply of suppressive low-loss the most according to claim 2, it is characterised in that institute
Stating inverse-excitation type change-over circuit by audion VT1, audion VT2, negative pole is connected with the colelctor electrode of audion VT1, positive pole is through electricity
Polar capacitor C3, the P pole being connected with the ON/OF pin of control chip U2 after resistance R4 is connected with the positive pole of polar capacitor C3, N
The diode D2 that pole is connected with the colelctor electrode of audion VT1, positive pole P pole with diode D2 after resistance R3 is connected, negative
The polar capacitor C2 of pole ground connection, one end is connected with the positive pole of polar capacitor C2, the other end is connected with the colelctor electrode of audion VT2
The inductance L1 connect, positive pole colelctor electrode with audion VT2 after resistance R6 is connected, negative pole after resistance R8 with audion VT2
Polar capacitor C5, the N pole that is connected of emitter stage base stage with audion VT1 after adjustable resistance R5 be connected, P is through resistance R7
The diode D3 that negative pole with polar capacitor C5 is connected afterwards, negative pole is connected with the emitter stage of audion VT1, positive pole and three poles
The polar capacitor C4 that the base stage of pipe VT2 is connected, one end is connected with the negative pole of polar capacitor C4, the other end and polar capacitor C4
The resistance R9 that is connected of positive pole, and P pole is connected with the negative pole of polar capacitor C5, N pole after adjustable resistance R10 with three poles
The diode D4 composition that the emitter stage of pipe VT1 is connected；The N pole of described diode D3 also colelctor electrode with audion VT2 is connected
Connect；The adjustable end of described adjustable resistance R10 is connected with the FB pin of control chip U2；The N pole of described diode D4 and control
The GND pin of chip U2 be connected after ground connection.
A kind of current loss portable Switching Power Supply of suppressive low-loss the most according to claim 3, it is characterised in that institute
State high impedance voltage output circuit by field effect transistor MOS1, audion VT3, audion VT4, positive pole and transformator T2 secondary inductance
Polar capacitor C7, the P pole that the non-same polarity of coil is connected, negative pole emitter stage with audion VT3 after resistance R14 is connected
The diode D6, P that negative pole with polar capacitor C7 is connected after resistance R13, N pole is connected with the emitter stage of audion VT3
The diode D7 that pole is connected with the negative pole of polar capacitor C7, N pole base stage with audion VT3 after resistance R16 is connected, just
Ground connection after pole is connected with the Same Name of Ends of transformator T2 secondary inductance coil, negative pole is connected with the drain electrode of field effect transistor MOS1
Polar capacitor C8, positive pole emitter stage with audion VT3 after resistance R15 is connected, negative pole after resistance R17 with audion
The polar capacitor C9 that the colelctor electrode of VT3 is connected, one end is connected with the negative pole of polar capacitor C9, the other end and audion VT4
The adjustable resistance R18 that is connected of emitter stage, and P pole base stage with audion VT4 after resistance R19 is connected, N pole is through electricity
The diode D8 composition being connected with the grid of field effect transistor MOS1 after sense L2；The grid of described field effect transistor MOS1 also has three poles
The colelctor electrode of pipe VT4 is connected, its source electrode is connected with the colelctor electrode of audion VT3；The N pole of described diode D8 and field effect
The grid of pipe MOS1 is collectively forming the outfan of high impedance voltage output circuit.
A kind of current loss portable Switching Power Supply of suppressive low-loss the most according to claim 4, it is characterised in that institute
Stating control chip U2 is the integrated chip of MAX5035.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610644629.9A CN106253683A (en) | 2016-08-08 | 2016-08-08 | A kind of current loss portable Switching Power Supply of suppressive low-loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610644629.9A CN106253683A (en) | 2016-08-08 | 2016-08-08 | A kind of current loss portable Switching Power Supply of suppressive low-loss |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106253683A true CN106253683A (en) | 2016-12-21 |
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ID=58078355
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610644629.9A Pending CN106253683A (en) | 2016-08-08 | 2016-08-08 | A kind of current loss portable Switching Power Supply of suppressive low-loss |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106253683A (en) |
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2016
- 2016-08-08 CN CN201610644629.9A patent/CN106253683A/en active Pending
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Application publication date: 20161221 |