CN108400710A - A kind of novel ultra-wide input DC reduction voltage circuits - Google Patents
A kind of novel ultra-wide input DC reduction voltage circuits Download PDFInfo
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- CN108400710A CN108400710A CN201810457938.4A CN201810457938A CN108400710A CN 108400710 A CN108400710 A CN 108400710A CN 201810457938 A CN201810457938 A CN 201810457938A CN 108400710 A CN108400710 A CN 108400710A
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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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention belongs to electric circuit electronics technical technical fields, are related to a kind of novel ultra-wide input DC reduction voltage circuits.It includes BUCK structure basic circuits, regulator circuit, charge pump circuit, constant current load circuit, voltage and current Acquisition Circuit, constant voltage constant current control circuit and electric power management circuit, the input terminal of the input termination power and constant voltage constant current control circuit of electric power management circuit, the input terminal of the output end of electric power management circuit and the input terminal of regulator circuit and BUCK structure basic circuits connects, the output end of regulator circuit is connect through the charge pump circuit input terminal electrical with constant current load circuit, the output end of regulator circuit is also connect with the input terminal of constant voltage constant current control circuit, the output end of BUCK structure basic circuits is connect with the input terminal of the input terminal of constant current load circuit and voltage and current Acquisition Circuit respectively, the output end of voltage and current Acquisition Circuit and the input terminal of constant voltage constant current control circuit connect.The reduction voltage circuit input direct-current voltage wider range, and can realize the automatic switchover of constant pressure and flow.
Description
Technical field
The invention belongs to electric circuit electronics technical technical fields, and DC reduction voltage circuits are inputted more particularly, to a kind of novel ultra-wide.
Background technology
Direct current：It refer to all invariant in time electric current of size and Orientation.Many electrical appliances, Source Music are raised one's voice
Many electric appliances without inductance element such as device all use DC powered.Divide positive and negative electrode, transformer can not be utilized to change voltage, used
In low-voltage electric appliance.All belong to such with the electric appliance of dry-cell.
Alternating current：Alternating current refers to that size and Orientation all does periodically variable electric current at any time, common exchange be by
What sinusoidal rule or cosine rule changed, electric current first changes to maximum by zero, then changes to zero by maximum.Then negative direction is changed to by zero
Maximum, then become zero by maximum, a cycle is completed, is next cycle later, changes repeatedly.Alternating current have have very much it is excellent
Point, except it can be used for some special electrical appliances, such as motor outside, it has electric transmission, especially remote transmission
Special significance.
When one pole of alternating current is positive, another pole is exactly negative, ceaselessly exchanges and changes (the power supply change per second of household 60 times
It is positive and negative), alternating current can utilize transformer to change voltage, become more than ten0000 volts of high pressure in long-distance transport and transport, can be with
Reduce the loss occurred by resistance.The big electric appliance of household, such as refrigerator, TV, cold air all use alternating current.
With the development of electronic technology, status of the electronic equipment in people’s lives and production is also more and more important, perhaps
Higher requirements are also raised to required power supply for more electronic equipments.And considerable electronic equipment cannot directly make among these
The AC power provided with power grid, but stable DC source is needed, therefore to the performance, volume, weight etc. of DC power supply
Requirement be also continuously improved, existing reduction voltage circuit input voltage width is smaller.
Invention content
Place in view of the shortcomings of the prior art, the present invention propose a kind of novel ultra-wide input DC reduction voltage circuits, should
Reduction voltage circuit input direct-current voltage wider range, and can realize the automatic switchover of constant pressure and flow.
The present invention adopts the following technical scheme that：
A kind of novel ultra-wide input DC reduction voltage circuits, it includes BUCK structures basic circuit, regulator circuit, charge pump electricity
Road, constant current load circuit, voltage and current Acquisition Circuit, constant voltage constant current control circuit and electric power management circuit, the power management
The input terminal of the input termination power and constant voltage constant current control circuit of circuit, the output end of electric power management circuit and regulator circuit
Input terminal is connected with the input terminal of BUCK structure basic circuits, and the output end of the regulator circuit is negative through charge pump circuit and constant current
The electrical input terminal connection of circuit is carried, the output end of regulator circuit is also connect with the input terminal of constant voltage constant current control circuit, described
The output end of the BUCK structure basic circuits input terminal with the input terminal of constant current load circuit and voltage and current Acquisition Circuit respectively
Connection, the output end of voltage and current Acquisition Circuit and the input terminal of constant voltage constant current control circuit connect.
The technical program further optimizes, and the regulator circuit includes voltage stabilizing chip U2, the 15th capacitance C15, the tenth
The third pin of four capacitance C14 and the 16th capacitance C16, the voltage stabilizing chip U2 connect 8V voltage ends, and the first of voltage stabilizing chip U2
Pin connects 5V voltage ends, and the 15th capacitance C15, the 14th electricity are serially connected between the third pin and second pin of voltage stabilizing chip U2
It is serially connected between the first pin of voltage stabilizing chip U2 and second pin after holding C14 and the 16th capacitance C16 parallel connections, voltage stabilizing chip U2
Second pin ground connection.
The technical program further optimizes, and the charge pump circuit includes the 8th capacitance C8, power supply chip U1 and the tenth
Capacitance C10, the 8th capacitance C8 are serially connected between the second pin of power supply chip U1 and the 4th pin, and the of power supply chip U1
Three pins are grounded, and the 8th pin connects 5V voltage ends, and the 5th pin is grounded through the tenth capacitance C10, and the 5th pin connects -5V voltages
End.
The technical program further optimizes, the model ICL7660S of the power supply chip U1.
The technical program further optimizes, the constant current load circuit include the first triode Q1,3rd resistor R3 and
The collector of 4th resistance R4, the first triode Q1 connect BUCK structure basic circuits, and emitter meets -5V through 3rd resistor R3
Voltage end, base stage connect BUCK structure basic circuits through the 4th resistance R4.
The technical program further optimizes, and the constant voltage constant current control circuit includes operational amplifier IC2, the 7th capacitance
C7, the 8th resistance R8, the 9th capacitance C9, the first diode D1, the second diode D2, the 18th capacitance C18, the 17th capacitance
C17, eleventh resistor R11, the 9th resistance R9, the tenth resistance R10, the 11st capacitance C11, the 12nd capacitance C12, the first variable resistance
Device CC and the second rheostat CV, the first pin of the operational amplifier IC2 connect the anode of the second diode D2, the second diode
The cathode of D2 connects the cathode of the first diode D1, and the anode of the first diode D1 connects the 7th pin of operational amplifier IC2, operation
The 17th capacitance C17 is concatenated between the first pin and second pin of amplifier IC2, second pin connects through the 18th capacitance C18
The cathode of the cathode of first diode D1, the second diode D2 connects BUCK structure basic circuits, and the third of operational amplifier IC2 is drawn
Foot and the 4th pin are grounded, and second pin is through eleventh resistor R11, the 9th resistance R9, the 11st capacitance C11, the 12nd electricity
Hold C12, the tenth resistance R10 connects the 6th pin, concatenation the 9th between the 6th pin and the 7th pin of the operational amplifier IC2
Capacitance C9, the 6th pin connect the cathode of the first diode D1 through the 8th resistance R8, the 7th capacitance C7, and the 8th pin connects 8V voltages
End, the common end of the 9th resistance R9 and the 11st capacitance C11 of control termination of the first rheostat CC, the first termination 5V voltages
End, second end ground connection, the common end of the tenth resistance R10 and the 12nd capacitance C12 of control termination of the second rheostat CV, first end
Connect 5V voltage ends, second end ground connection, the common end grounding of the 11st capacitance C11 and the 12nd capacitance C12.
The technical program further optimizes, the model LM358 of the operational amplifier IC2.
The technical program further optimizes, and the BUCK structures basic circuit uses XL7036 chips.
The present invention compared with the existing technology, has the following advantages that：
It is adjusted 1. DC input voitage range 12-90V, output voltage 0V rise, maximum output 15V, output current 0-1A is adjustable.
2. exporting CC/CV constant pressure and flows to automatically switch, voltage and current value continuously linear is adjusted.
3. ensureing to stablize output in the case where being lightly loaded low pressure.
4. with input low-voltage variation, overcurrent protection.
Description of the drawings
Fig. 1 is the structure diagram of novel ultra-wide input DC reduction voltage circuits；
Fig. 2 is the schematic diagram of novel ultra-wide input DC reduction voltage circuits；
Fig. 3 is the schematic diagram of BUCK structure basic circuits.
Specific implementation mode
To further illustrate that each embodiment, the present invention are provided with attached drawing.These attached drawings are that the invention discloses one of content
Point, mainly to illustrate embodiment, and the associated description of specification can be coordinated to explain the operation principles of embodiment.Cooperation ginseng
These contents are examined, those of ordinary skill in the art will be understood that other possible embodiments and advantages of the present invention.In figure
Component be not necessarily to scale, and similar component symbol is conventionally used to indicate similar component.
In conjunction with the drawings and specific embodiments, the present invention is further described.
As shown in fig.1, the present invention proposes that a kind of novel ultra-wide inputs DC reduction voltage circuits, it includes that BUCK structures are substantially electric
Road, regulator circuit, charge pump circuit, constant current load circuit, voltage and current Acquisition Circuit, constant voltage constant current control circuit and power supply pipe
Manage circuit, the input terminal of the input termination power and constant voltage constant current control circuit of the electric power management circuit, electric power management circuit
Output end and regulator circuit input terminal and BUCK structure basic circuits input terminal connect, the output end of the regulator circuit
It is connect through the charge pump circuit input terminal electrical with constant current load circuit, the output end of regulator circuit also controls electricity with constant pressure and flow
The input terminal on road connects, and the output end of the BUCK structures basic circuit is electric with the input terminal of constant current load circuit and voltage respectively
The input terminal connection of Acquisition Circuit is flowed, the output end of voltage and current Acquisition Circuit and the input terminal of constant voltage constant current control circuit connect
It connects.
Shown in Fig. 2 and Fig. 3, the circuit diagram of a present invention preferably embodiment.Direct-flow input end IN1 can be inputted
The DC voltage of 12-90V concatenates the 5th capacitance C5 between the anode and cathode of direct-flow input end IN1.Direct-flow input end IN1's
Anode switches through the 5th pin of parallel operation IC1, and cathode switches through the 7th pin of parallel operation IC1, the 5th pin of converter IC 1 and the 4th
The 4th capacitance C4 is concatenated between pin, the 6th capacitance C6 is concatenated between second pin and the 7th pin, and second pin is as 8V
Voltage output end, the 6th pin ground connection.First pin of converter IC 1 connects constant-current and constant-voltage control circuit, third pin and the 7th
Series diode CT between pin.The third pin of parallel operation IC1 is switched through in first one end inductance L1, and the other end is as output end OUT1
Anode, output end OUT1 cathode ground connection.First capacitance C1, the second capacitance C2, third capacitance C3 latter termination output in parallel
Hold the anode of OUT1, the cathode of another termination output end OUT1；5th resistance R5 and the 6th one end resistance R6 in parallel connects conversion
The 7th pin of device IC1, the cathode of another termination output end OUT1.The first electricity of concatenation between the anode and cathode of output end OUT1
The public termination constant voltage constant current control circuit of R1 and second resistance R2, first resistor R1 and second resistance R2 are hindered, converter IC 1
7th pin connects constant voltage constant current control circuit through the 7th resistance R7.
BUCK structure basic circuits, main control chip converter IC 1 use XL7036, which can be between 12V-90V
Work, less than 12V by start inside protection circuit be stopped, the chip interior integrated high voltage high-power MOS tube, just with
The inductance of outside, Schottky diode form BUCK structure basic circuits.
BUCK structure basic circuits, which must have load, could stablize output, and this design is regulated power supply, that is to say, that
It is also required to load sourcing current when 0V is exported, devises constant current load circuit thus, the constant current load circuit of the embodiment includes
The collector of first triode Q1,3rd resistor R3 and the 4th resistance R4, the first triode Q1 connect output end OUT1 anodes,
Emitter connects -5V voltage ends, i.e. the 8th pin of the power supply chip U1 of charge pump circuit through 3rd resistor R3, and base stage is through the 4th electricity
Resistance R4 switches through the 7th pin of parallel operation IC1.First triode Q1 base stages are connected on by the 4th resistance R4 above input ground so that the
One triode Q1 emitters minimum voltage thus has 4.3V or so voltage-drop loading 3rd resistors R3 relative to input ground -0.7V
On, the electric current for flowing through 3rd resistor R3 is approximately equal to the first triode Q1 collector currents, thus reaches constant current purpose.
The constant voltage constant current control circuit of the embodiment includes operational amplifier IC2, the 7th capacitance C7, the 8th resistance R8,
Nine capacitance C9, the first diode D1, the second diode D2, the 18th capacitance C18, the 17th capacitance C17, eleventh resistor R11,
9th resistance R9, the tenth resistance R10, the 11st capacitance C11, the 12nd capacitance C12, the first rheostat CC and the second rheostat
CV.The first pin of the operational amplifier IC2 connects the anode of the second diode D2, and the cathode of the second diode D2 connects the one or two
The anode of the cathode of pole pipe D1, the first diode D1 connects the 7th pin of operational amplifier IC2.The first of operational amplifier IC2
The 17th capacitance C17 is concatenated between pin and second pin, second pin connects the negative of the first diode D1 through the 18th capacitance C18
The cathode of pole, the second diode D2 switches through the first pin of parallel operation IC1.The third pin and the 4th pin of operational amplifier IC2
It is grounded, second pin is through eleventh resistor R11, the 9th resistance R9, the 11st capacitance C11, the 12nd capacitance C12, the tenth electricity
Resistance R10 connects the 6th pin, and the 7th resistance R7 of common end of eleventh resistor R11 and the 9th resistance R9 switches through the of parallel operation IC1
Seven pins.The 9th capacitance C9 is concatenated between the 6th pin and the 7th pin of the operational amplifier IC2, the 6th pin is through the 8th
Resistance R8, the 7th capacitance C7 connect the cathode of the first diode D1, and the 8th pin connects 8V voltage ends.The control of the first rheostat CC
The common end of the 9th resistance R9 and the 11st capacitance C11 of system termination, the first termination 5V voltage ends, second end ground connection, the second variable resistance
The common end of the tenth resistance R10 and the 12nd capacitance C12 of control termination of device CV, the first termination 5V voltage ends, second end ground connection,
The common end grounding of 11st capacitance C11 and the 12nd capacitance C12.
The operational amplifier IC2 of the constant voltage constant current control circuit uses LM358, based on LM358, the electricity of system output
Pressure is compared with electric current with the voltage that potentiometer is adjusted, and crossing high pass feedback control XL7036 when voltage output reduces duty ratio
To achieve the purpose that reduce voltage, electric current is similarly.
The regulator circuit of the embodiment includes voltage stabilizing chip U2, the 15th capacitance C15, the 14th capacitance C14 and the 16th
The third pin of capacitance C16, the voltage stabilizing chip U2 switch through the second pin of parallel operation, i.e. 8V voltage ends, and the of voltage stabilizing chip U2
One pin output 5V voltages are serially connected with the 15th as 5V voltage ends between the third pin and second pin of voltage stabilizing chip U2
The first pin of voltage stabilizing chip U2 and second is serially connected in after capacitance C15, the 14th capacitance C14 and the 16th capacitance C16 parallel connections to draw
Between foot, the second pin of voltage stabilizing chip U2 is grounded.8V voltages are converted into 5V voltage outputs by the regulator circuit.
The charge pump circuit of the embodiment includes the 8th capacitance C8, power supply chip U1 and the tenth capacitance C10, the 8th electricity
Hold C8 to be serially connected between the second pin of power supply chip U1 and the 4th pin, the third pin ground connection of power supply chip U1, the 8th draws
Foot connects 5V voltage ends, i.e. the first pin of voltage stabilizing chip U2, and the 5th pin is grounded through the tenth capacitance C10, and the 5th pin output-
5V voltages, as -5V voltage ends.Circuit output end of pressure-stabilizing 5V voltages are converted into -5V by charge pump circuit.The type of power supply chip U1
Number be ICL7660S.
Although specifically showing and describing the present invention in conjunction with preferred embodiment, those skilled in the art should be bright
In vain, it is not departing from the spirit and scope of the present invention defined by the appended claims, it in the form and details can be right
The present invention makes a variety of changes, and is protection scope of the present invention.
Claims (8)
1. a kind of novel ultra-wide inputs DC reduction voltage circuits, it is characterised in that：It include BUCK structures basic circuit, regulator circuit,
Charge pump circuit, constant current load circuit, voltage and current Acquisition Circuit, constant voltage constant current control circuit and electric power management circuit, it is described
The input terminal of the input termination power and constant voltage constant current control circuit of electric power management circuit, the output end of electric power management circuit with it is steady
The input terminal of volt circuit is connected with the input terminal of BUCK structure basic circuits, and the output end of the regulator circuit is through charge pump circuit
The input terminal electrical with constant current load circuit is connect, and the output end of regulator circuit also connects with the input terminal of constant voltage constant current control circuit
Connect, the output end of the BUCK structures basic circuit respectively with the input terminal of constant current load circuit and voltage and current Acquisition Circuit
Input terminal connects, and the output end of voltage and current Acquisition Circuit and the input terminal of constant voltage constant current control circuit connect.
2. novel ultra-wide as described in claim 1 inputs DC reduction voltage circuits, it is characterised in that：The regulator circuit includes voltage stabilizing
The third pin of chip U2, the 15th capacitance C15, the 14th capacitance C14 and the 16th capacitance C16, the voltage stabilizing chip U2 connect
First pin of 8V voltage ends, voltage stabilizing chip U2 connects 5V voltage ends, is gone here and there between the third pin and second pin of voltage stabilizing chip U2
It is connected to the 15th capacitance C15, being serially connected in the first of voltage stabilizing chip U2 after the 14th capacitance C14 and the 16th capacitance C16 parallel connections draws
Between foot and second pin, the second pin of voltage stabilizing chip U2 is grounded.
3. novel ultra-wide as described in claim 1 inputs DC reduction voltage circuits, it is characterised in that：The charge pump circuit includes the
Eight capacitance C8, power supply chip U1 and the tenth capacitance C10, the 8th capacitance C8 are serially connected in the second pin and of power supply chip U1
Between four pins, the third pin of power supply chip U1 is grounded, and the 8th pin connects 5V voltage ends, and the 5th pin is through the tenth capacitance C10
Ground connection, and the 5th pin connects -5V voltage ends.
4. novel ultra-wide as claimed in claim 3 inputs DC reduction voltage circuits, it is characterised in that：The model of the power supply chip U1
For ICL7660S.
5. novel ultra-wide as described in claim 1 inputs DC reduction voltage circuits, it is characterised in that：The constant current load circuit includes
First triode Q1,3rd resistor R3 and the 4th resistance R4, it is substantially electric that the collector of the first triode Q1 connects BUCK structures
Road, emitter connect -5V voltage ends through 3rd resistor R3, and base stage connects BUCK structure basic circuits through the 4th resistance R4.
6. novel ultra-wide as described in claim 1 inputs DC reduction voltage circuits, it is characterised in that：The constant voltage constant current control circuit
Including operational amplifier IC2, the 7th capacitance C7, the 8th resistance R8, the 9th capacitance C9, the first diode D1, the second diode D2,
18th capacitance C18, the 17th capacitance C17, eleventh resistor R11, the 9th resistance R9, the tenth resistance R10, the 11st capacitance
The first pin of C11, the 12nd capacitance C12, the first rheostat CC and the second rheostat CV, the operational amplifier IC2 connect
The anode of two diode D2, the cathode of the second diode D2 connect the cathode of the first diode D1, and the anode of the first diode D1 connects
The 7th pin of operational amplifier IC2 concatenates the 17th capacitance between the first pin and second pin of operational amplifier IC2
C17, second pin connect the cathode of the first diode D1 through the 18th capacitance C18, and the cathode of the second diode D2 connects BUCK structures
Basic circuit, the third pin and the 4th pin of operational amplifier IC2 are grounded, and second pin is through eleventh resistor R11, the 9th
Resistance R9, the 11st capacitance C11, the 12nd capacitance C12, the tenth resistance R10 connect the 6th pin, the operational amplifier IC2's
The 9th capacitance C9 is concatenated between 6th pin and the 7th pin, the 6th pin connects the one or two through the 8th resistance R8, the 7th capacitance C7
The cathode of pole pipe D1, the 8th pin connect 8V voltage ends, and the control of the first rheostat CC terminates the 9th resistance R9 and the 11st
The common end of capacitance C11, the first termination 5V voltage ends, the control of second end ground connection, the second rheostat CV terminate the tenth resistance R10
With the common end of the 12nd capacitance C12, the first termination 5V voltage ends, second end ground connection, the 11st capacitance C11 and the 12nd capacitance
The common end grounding of C12.
7. novel ultra-wide as claimed in claim 6 inputs DC reduction voltage circuits, it is characterised in that：The operational amplifier IC2's
Model LM358.
8. novel ultra-wide as described in claim 1 inputs DC reduction voltage circuits, it is characterised in that：The BUCK structures basic circuit
Using XL7036 chips.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810457938.4A CN108400710A (en) | 2018-05-14 | 2018-05-14 | A kind of novel ultra-wide input DC reduction voltage circuits |
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| CN201810457938.4A CN108400710A (en) | 2018-05-14 | 2018-05-14 | A kind of novel ultra-wide input DC reduction voltage circuits |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109713895A (en) * | 2018-12-26 | 2019-05-03 | 上海南芯半导体科技有限公司 | One kind is for constant current and constant power control circuit and implementation method in DC-DC |
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| CN109713895A (en) * | 2018-12-26 | 2019-05-03 | 上海南芯半导体科技有限公司 | One kind is for constant current and constant power control circuit and implementation method in DC-DC |
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