CN110445395A - Wide-voltage range direct current input switch power supply - Google Patents
Wide-voltage range direct current input switch power supply Download PDFInfo
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- CN110445395A CN110445395A CN201910744723.5A CN201910744723A CN110445395A CN 110445395 A CN110445395 A CN 110445395A CN 201910744723 A CN201910744723 A CN 201910744723A CN 110445395 A CN110445395 A CN 110445395A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 49
- 239000003990 capacitor Substances 0.000 claims description 44
- 230000001105 regulatory effect Effects 0.000 claims description 40
- 238000004804 winding Methods 0.000 claims description 27
- 230000000087 stabilizing effect Effects 0.000 claims description 19
- 230000005611 electricity Effects 0.000 claims description 16
- 238000013519 translation Methods 0.000 claims description 7
- 230000009466 transformation Effects 0.000 claims 1
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
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- 238000005859 coupling reaction Methods 0.000 description 1
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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
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Abstract
It includes: power supply that the present invention, which provides a kind of wide-voltage range direct current input switch power supply, DC-DC power conversion circuit, pwm chip, power supply chip, the anode and negative terminal of the power supply are separately connected the first input end and the second input terminal of the DC-DC power conversion circuit, the first input end of the pwm chip and the second input terminal, the first input end of the power supply chip and the second input terminal, first resistor and second resistance are also in series between the anode and negative terminal of the power supply, the third input terminal of the pwm chip is connected to the tie point of the first resistor and the second resistance, the output end of the power supply chip is also connected to the tie point of the first resistor and the second resistance by 3rd resistor, the output end of the pwm chip is connected to the DC-D The third input terminal of C power conversion circuit.The present invention can be significantly expanded the input voltage range of pwm chip permission by power supply chip, it can expand the operating voltage range of Switching Power Supply.
Description
Technical field
The invention belongs to the Switching Power Supply class products of direct current input type more particularly to a kind of wide-voltage range direct current to input
Switching Power Supply.
Background technique
With the progress of battery technology, more and more electrical equipments are powered using direct current input, and direct current electricity consumption
There are many kinds of the supply voltages of equipment, for example allow there are commonly 12V, 24V, 36V, 48V, 60V etc., each power supply
Scope range of the fluctuation of voltage is smaller, for example 12V battery should normally usually require in this way between 10V-14V for different input electricity
Pressure designs different Switching Power Supplies.In addition, many Switching Power Supply pwm chips also only allow chip in certain input electricity
Work in range is pressed, the operating voltage range beyond permission then triggers overvoltage/undervoltage protection and stops working, and sometimes people
It needs Switching Power Supply that can work in broader voltage range, can such as be compatible with 12V, 24V, 36V, 48V, 60V even 72V simultaneously
The direct current input of equal different sizes.
For example, point shown in Figure 1, that pwm chip is made up of Vline pin and resistance R1', R2'
Pressure network network detects DC input voitage, is amplifier inside pin Vline, and input high impedance can consider it for open circuit, so pipe
Foot voltage Vline=R2'*Vin/ (R1'+R2') derives Vin=Vline* (R1'+R2')/R2'=Vline* (R1'/R2'
+1).If Vline ∈ [V1, V2], in the case where Vline range is certain, it can be seen that the working range that Switching Power Supply allows
Vin upper limit Vinmax and lower limit Vinmin becomes larger with the ratio of R1'/R2' and becomes larger and become smaller with the ratio of R1'/R2' and become
It is small, that is to say, that if the upper limit improves lower limit and also and then improves, the upper limit also can be reduced and then if lower limit reduces, also
It is to say that no matter how adjusting R1' and R2' all can not accomplish bound to both direction while widened possibility.Therefore, it is necessary to it
Its method solves the problems, such as this.
Summary of the invention
In response to this problem, the present invention provides a kind of wider wide-voltage range direct current input switch power supply of working range.
Technical purpose of the invention is realized by following technical solution:
A kind of wide-voltage range direct current input switch power supply, the wide-voltage range direct current input switch power supply includes: electricity
Source, DC-DC power conversion circuit, pwm chip, power supply chip, the anode and negative terminal of the power supply are separately connected the DC-
The first input end of DC power conversion circuit and the second input terminal, the first input end of the pwm chip and the second input
End, the first input end of the power supply chip and the second input terminal, are also in series with first between the anode and negative terminal of the power supply
Resistance and second resistance, the third input terminal of the pwm chip are connected to the first resistor and the second resistance
Tie point, the output end of the power supply chip are also connected to the company of the first resistor and the second resistance by 3rd resistor
Contact, the output end of the pwm chip are connected to the third input terminal of the DC-DC power conversion circuit.
Further, the power supply chip include the 4th resistance and the first trifocal regulated power supply, the one of the 4th resistance
The first input end as the power supply chip is held to connect with the anode of the power supply, the other end of the 4th resistance connects institute
The input terminal of the first trifocal regulated power supply is stated, the ground terminal of the first trifocal regulated power supply is as the power supply chip
Second input terminal is connect with the negative terminal of the power supply, and the output end of the first trifocal regulated power supply is connected to the 4th electricity
The tie point of resistance and the first trifocal regulated power supply, the connection of the 4th resistance and the first trifocal regulated power supply
Output end of the point as the power supply chip.
Further, the DC-DC power conversion circuit includes switching circuitry, and the switching circuitry includes the primary of transformer
Winding, one end of the armature winding are the anode phase of the first input end and the power supply of the DC-DC power conversion circuit
Even, the other end of the armature winding is the third input terminal and the pwm chip of the DC-DC power conversion circuit
Output end is connected.
Further, the DC-DC power conversion circuit further includes absorbing circuit, the absorbing circuit include the 5th resistance,
5th capacitor, the 4th diode, after the 5th resistance is in parallel with the 5th capacitor, one end and the DC-DC power conversion
The first input end of circuit is connected, and the other end is connected with the negative terminal of the 4th diode, the anode of the 4th diode and
The third input terminal of the DC-DC power conversion circuit is connected.
Further, the DC-DC power conversion circuit further includes voltage follower circuit, and the voltage follower circuit includes becoming
The first secondary windings, first diode, the second capacitor of depressor, one end of the first secondary windings of the transformer and described the
The anode of one diode is connected, the other end ground connection of the first secondary windings of the transformer, the negative terminal of the first diode
As the output end of the voltage follower circuit, the negative terminal of the first diode is also connected with one end of second capacitor,
The other end of second capacitor is grounded.
Further, the DC-DC power conversion circuit further includes that operating voltage provides circuit, and the operating voltage provides electricity
Road includes second subprime winding, the second diode, third diode, third capacitor, the 4th capacitor, the 15th electricity of transformer
Resistance, one end of the second subprime winding of the transformer are connected with the anode of second diode, and the second of the transformer
The other end of secondary windings is connected as the second input terminal of the DC-DC power conversion circuit with the negative terminal of the power supply, institute
The negative terminal for stating the second diode is connected with one end of the third capacitor, the other end of the third capacitor and the DC-DC function
Second input terminal of rate translation circuit is connected, and the negative terminal of second diode is also connected with one end of the 15th resistance,
The other end of 15th resistance provides the output end of circuit, the third diode and described the as the operating voltage
After four capacitors are in parallel, one end is connected with the output end that the operating voltage provides circuit, the other end and the DC-DC power conversion
Second input terminal of circuit is connected, and the pwm chip further includes the 4th input terminal, and the operating voltage provides the defeated of circuit
Outlet is connected with the 4th input terminal of the pwm chip.
Further, the DC-DC power conversion circuit further includes PWM oscillator signal circuit, and the pwm chip also wraps
The 5th input terminal is included, the PWM oscillator signal circuit includes the 6th resistance, and one end of the 6th resistance and the PWM are controlled
5th input terminal of chip is connected, the other end of the 6th resistance and the second input terminal of the DC-DC power conversion circuit
It is connected.
Further, the DC-DC power conversion circuit further includes pressure stabilizing feedback network, and the pressure stabilizing feedback network includes light
Coupling, the second trifocal regulated power supply, the 6th capacitor, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11st electricity
The light-emitting diodes tube anode of resistance, twelfth resistor, thirteenth resistor, the 14th resistance, the optocoupler passes through the 12nd electricity
Resistance be connected with the output end of the voltage follower circuit, the light-emitting diodes tube anode of the optocoupler also with the eleventh resistor
One end is connected, and the other end of the eleventh resistor is connected with the input terminal of the second trifocal regulated power supply, and described second
The ground terminal of trifocal regulated power supply is grounded, the light-emitting diodes tube cathode of the optocoupler also with the second trifocal regulated power supply
Input terminal be connected, the output end of the collector of the phototriode of the optocoupler and the operating voltage offer circuit is connected,
The emitter of the phototriode of the optocoupler is connected with one end of the 9th resistance, the other end conduct of the 9th resistance
One end of first output end of the pressure stabilizing feedback network, the 8th resistance is connected with the other end of the 9th resistance, institute
State second output terminal of the other end of the 8th resistance as the pressure stabilizing feedback network, the transmitting of the phototriode of the optocoupler
Pole also passes through the 7th resistance and is connected with the second input terminal of the DC-DC power conversion circuit, and second trifocal is steady
The output end of voltage source is connected with one end of the thirteenth resistor, the other end of the thirteenth resistor and the 6th capacitor
One end be connected, the other end of the 6th capacitor is also connected with the input terminal of the second trifocal regulated power supply, described the
The output end of two trifocal regulated power supplies is also connected with one end of the 14th resistance, the other end of the 14th resistance with
The output end of the voltage follower circuit is connected, the output end of the second trifocal regulated power supply also with the tenth resistance
One end is connected, and the other end ground connection of the tenth resistance, the pwm chip further includes the 6th input terminal and the 7th input
End, the first output end of the pressure stabilizing feedback network are connected with the 6th input terminal of the pwm chip, the pressure stabilizing feedback
The second output terminal of network is connected with the 7th input terminal of the pwm chip.
Further, the power supply is direct-current input power supplying, and the pwm chip is the MP6002 of MPS company, has 8
A pin, the first input end of the pwm chip are the 7th pin VIN, and the second input terminal is the 1st pin GND, and third is defeated
Entering end is the 2nd pin LINE, and the 4th input terminal is the 6th pin VCC, and the 5th input terminal is the 5th pin RT, and the 6th input terminal is
3 pin FB, the 7th input terminal are the 4th pin COMP, and output end is the 8th pin SW.
Further, the wide-voltage range direct current input switch power supply further includes first capacitor, the first capacitor connection
Between the anode and negative terminal of the power supply.
The present invention can be significantly expanded the input voltage range of pwm chip permission by power supply chip, it can expand
The operating voltage range of big Switching Power Supply.In addition, it is only necessary to which the specification for slightly adjusting some devices selects appropriate pressure resistance in other words
The device of specification, such as the pressure voltage of electrolytic capacitor, switch metal-oxide-semiconductor, rectifier diode, the design scheme same in this way can be simultaneous
Hold a variety of DC input voitages, cost is designed and developed in reduction.
Detailed description of the invention
Fig. 1 is a kind of structural block diagram of existing wide-voltage range direct current input switch power supply；
Fig. 2 is a kind of structural block diagram for wide-voltage range direct current input switch power supply that an embodiment of the present invention provides；
Fig. 3 is a kind of circuit theory for wide-voltage range direct current input switch power supply that an embodiment of the present invention provides
Figure.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.Many details are explained in the following description in order to fully understand this hair
It is bright.But the invention can be embodied in many other ways as described herein, those skilled in the art can be not
Similar improvement is done in the case where violating intension of the present invention, therefore the present invention is not limited by the specific embodiments disclosed below.
It should be noted that it can directly on the other element when element is referred to as " being set to " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body is not to be to limit the present invention.
It is shown in Figure 2, a kind of wide-voltage range direct current input switch power supply of an embodiment of the present invention, the wide electricity
Pressing range direct current input switch power supply includes: power supply J1, DC-DC power conversion circuit (not labeled), pwm chip U1, electricity
Source chip (not labeled), the anode DC+ and negative terminal DC- of the power supply J1 are separately connected the of the DC-DC power conversion circuit
One input terminal and the second input terminal, the first input end of the pwm chip U1 and the second input terminal, the power supply chip
First input end and the second input terminal are also in series with first resistor R1 and between the anode DC+ and negative terminal DC- of the power supply J1
Two resistance R2, the third input terminal of the pwm chip U1 are connected to the first resistor R1's and second resistance R2
The output end of tie point, the power supply chip is also connected to the first resistor R1 and the second resistance by 3rd resistor R3
The tie point of R2, the output end of the pwm chip U1 are connected to the third input terminal of the DC-DC power conversion circuit.
It is shown in Figure 3, wherein the power supply chip includes the 4th resistance R4 and the first trifocal regulated power supply U2,
One end of the 4th resistance R4 is connect as the first input end of the power supply chip with the anode DC+ of the power supply J1, institute
The other end for stating the 4th resistance R4 connects the input terminal of the first trifocal regulated power supply U2, the first trifocal pressure stabilizing electricity
The ground terminal of source U2 is connect as the second input terminal of the power supply chip with the negative terminal DC- of the power supply J1, and the described 1st
The output end of end formula regulated power supply U2 is connected to the tie point of the 4th resistance R4 Yu the first trifocal regulated power supply U2,
Output end of the tie point of the 4th resistance R4 and the first trifocal regulated power supply U2 as the power supply chip.
The DC-DC power conversion circuit includes switching circuitry, and the switching circuitry includes the armature winding of transformer T1
One end of T1-A, the armature winding T1-A are the first input end and the power supply J1 of the DC-DC power conversion circuit
Anode DC+ is connected, the other end of the armature winding T1-A be the DC-DC power conversion circuit third input terminal with it is described
The output end of pwm chip U1 is connected.
The DC-DC power conversion circuit further includes absorbing circuit, and the absorbing circuit includes the 5th resistance R5, the 5th electricity
Hold C5, the four or two pole D4 pipe, after the 5th resistance R5 is in parallel with the 5th capacitor C5, one end and the DC-DC power become
The first input end for changing circuit is connected, and the other end is connected with the negative terminal of the 4th diode D4, the 4th diode D4's
Anode is connected with the third input terminal of the DC-DC power conversion circuit.
The DC-DC power conversion circuit further includes voltage follower circuit, and the voltage follower circuit includes transformer T1
The first secondary windings T1-B, first diode D1, the second capacitor C2, the transformer T1 the first secondary windings T1-B one
End is connected with the anode of the first diode D1, the other end ground connection of the first secondary windings T1-B of the transformer T1, institute
Output end VOUT of the negative terminal as the voltage follower circuit of first diode D1 is stated, the negative terminal of the first diode D1 is also
It is connected with one end of the second capacitor C2, the other end ground connection of the second capacitor C2.
The DC-DC power conversion circuit further includes that operating voltage provides circuit, and the operating voltage provides circuit and includes
Second subprime winding T1-D, the second diode D2, third diode D3, third capacitor C3, the 4th capacitor C4, of transformer T1
One end of the second subprime winding T1-B of 15 resistance R15, the transformer T1 is connected with the anode of the second diode D2,
The other end of the second subprime winding T1-B of the transformer T1 as the DC-DC power conversion circuit the second input terminal with
The negative terminal DC- of the power supply J1 is connected, and the negative terminal of the second diode D2 is connected with one end of the third capacitor C3, described
The other end of third capacitor C3 is connected with the second input terminal of the DC-DC power conversion circuit, the second diode D2's
Negative terminal is also connected with one end of the 15th resistance R15, and the other end of the 15th resistance R15 is as the operating voltage
The output end VCC of circuit is provided, after the third diode D3 is in parallel with the 4th capacitor C4, one end and the operating voltage
The output end VCC for providing circuit is connected, and the other end is connected with the second input terminal of the DC-DC power conversion circuit, the PWM
Controlling chip U1 further includes the 4th input terminal, and the operating voltage provides the output end VCC and the pwm chip U1 of circuit
The 4th input terminal be connected.Wherein, the third diode D3 is zener diode or Zener diode.
The DC-DC power conversion circuit further includes PWM oscillator signal circuit, and the pwm chip U1 further includes
Five input terminals, the PWM oscillator signal circuit include the 6th resistance R6, and one end of the 6th resistance R6 and the PWM are controlled
5th input terminal of chip is connected, the second input of the other end and the DC-DC power conversion circuit of the 6th resistance R6
End is connected.
The DC-DC power conversion circuit further includes pressure stabilizing feedback network, and the pressure stabilizing feedback network includes optocoupler U4,
Two trifocal regulated power supply U3, the 6th capacitor C6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10,
11 resistance R11, twelfth resistor R12, thirteenth resistor R13, the 14th resistance R14, the light emitting diode of the optocoupler U4
Anode is connected by the twelfth resistor R12 with the output end VOUT of the voltage follower circuit, and the optocoupler U4's shines
Diode anode is also connected with one end of the eleventh resistor R11, the other end of the eleventh resistor R11 and described second
The input terminal of trifocal regulated power supply U3 is connected, the ground terminal ground connection of the second trifocal regulated power supply U3, the optocoupler U4
Light-emitting diodes tube cathode be also connected with the input terminal of the second trifocal regulated power supply U3, photosensitive three pole of the optocoupler U4
The collector of pipe is connected with the output end VCC that the operating voltage provides circuit, the transmitting of the phototriode of the optocoupler U4
Pole is connected with one end of the 9th resistance R9, the other end of the 9th resistance R9 as the pressure stabilizing feedback network first
One end of output end, the 8th resistance R8 is connected with the other end of the 9th resistance R9, and the 8th resistance R8's is another
Hold second output terminal as the pressure stabilizing feedback network, the emitter of the phototriode of the optocoupler U4 also passes through described the
Seven resistance R7 are connected with the second input terminal of the DC-DC power conversion circuit, and the second trifocal regulated power supply U3's is defeated
Outlet is connected with one end of the thirteenth resistor R13, and the other end of the thirteenth resistor R13 is with the 6th capacitor C6's
One end is connected, and the other end of the 6th capacitor C6 is also connected with the input terminal of the second trifocal regulated power supply U3, described
The output end of second trifocal regulated power supply U3 is also connected with one end of the 14th resistance R14, the 14th resistance R14
The other end be connected with the output end VOUT of the voltage follower circuit, the output end of the second trifocal regulated power supply U3 is also
It is connected with one end of the tenth resistance R10, the other end ground connection of the tenth resistance R10, the pwm chip U2 is also wrapped
Include the 6th input terminal and the 7th input terminal, the of the first output end of the pressure stabilizing feedback network and the pwm chip U1
Six input terminals are connected, and the second output terminal of the pressure stabilizing feedback network is connected with the 7th input terminal of the pwm chip U1.
Specifically, in one embodiment, the power supply is direct-current input power supplying, and the pwm chip U1 is MPS company
MP6002, there are 8 pins, the first input end of the pwm chip U1 is the 7th pin VIN, and the second input terminal is the
1 pin GND, third input terminal are the 2nd pin LINE, and the 4th input terminal is the 6th pin VCC, and the 5th input terminal is the 5th pin
RT, the 6th input terminal are the 3rd pin FB, and the 7th input terminal is the 4th pin COMP, and output end is the 8th pin SW.
The wide-voltage range direct current input switch power supply further includes first capacitor C1, and the first capacitor C1 is connected to institute
It states between the anode DC+ of power supply J1 and negative terminal DC-.
The present invention is connected by power supply chip with pwm chip, can calculate Vin=[(R1*R2+R1*R3+ at this time
R2*R3) * Vline-R1*R2Vo]/(R2*R3)=(R1/R2+1) Vline+R1/R3* (Vline-Vo), wherein Vin is power supply
Voltage, Vline are the operating voltages of pwm chip, and Vo is the output voltage of power supply chip.Assuming that Vline and R1 and R2 are
And R1/ fixed, then (R1/R2+1) Vline also determine relatively, and changing for Vin is related with the output voltage Vo of R3 and power supply chip, i.e.,
R3* (Vline-Vo) is related, and Vline ∈ [V1, V2], if Vo is Vo ∈ (V1, V2) between V1 and V2, then
(Vline-Vo) result can just be born, i.e. V2-Vo > 0, V1-Vo < 0, then Vin=(R1/R2+1) Vline+R1/R3*
(Vline-Vo) bound can expand, and widened range is determined by the product of R1/R3 He (Vline-Vo).
If for example, R1=240K, R2=10K, R3=12K, Vline ∈ [1.2,3], Vo=2.5V,
In existing scheme, upper limit Vinmax=(R1/R2+1) the * V2=of Switching Power Supply operating voltage Vin permission
(240K/10K+1) * 3=75 (V), lower limit Vinmin=(R1/R2+1) * V1=(240K/10K+1) * 1.2=30 (V), i.e., this
Switching Power Supply can work in the voltage range between input 30V~75V；
In the present invention, upper limit Vinmax=(R1/R2+1) V2+R1/R3* that Switching Power Supply operating voltage Vin allows
(V2-Vo)=(240K/10K+1) * 3+240K/12K* (3-2.5)=75+10=85 (V), Vinmin=(R1/R2+1) V1+
R1/R3* (V1-Vo)=(240K/10K+1) * 1.2+240K/12K* (1.2-2.5)=30-26=4 (V), i.e. this Switching Power Supply
It can work in the range of inputting 4V~85V, the range relative to former 30V~75V obviously expands.Since it is considered that MP6002
Minimum operating voltage be 10V (pass through the 7th pin VIN detect), this power supply can work between 10V~85V, after actual measurement should
Power supply real work voltage range and theoretical calculation match.
The present invention can be significantly expanded the input voltage range of pwm chip permission by power supply chip, it can expand
The operating voltage range of big Switching Power Supply.In addition, it is only necessary to which the specification for slightly adjusting some devices selects appropriate pressure resistance in other words
The device of specification, such as the pressure voltage of electrolytic capacitor, switch metal-oxide-semiconductor, rectifier diode, the design scheme same in this way can be simultaneous
Hold a variety of DC input voitages, cost is designed and developed in reduction.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of wide-voltage range direct current input switch power supply, which is characterized in that the wide-voltage range direct current input switch electricity
Source includes: power supply, DC-DC power conversion circuit, pwm chip, power supply chip, and the anode and negative terminal of the power supply connect respectively
Connect the DC-DC power conversion circuit first input end and the second input terminal, the pwm chip first input end and
Second input terminal, the first input end of the power supply chip and the second input terminal are also gone here and there between the anode and negative terminal of the power supply
It is associated with first resistor and second resistance, the third input terminal of the pwm chip is connected to the first resistor and described
The output end of the tie point of two resistance, the power supply chip is also connected to the first resistor and described second by 3rd resistor
The tie point of resistance, the output end of the pwm chip are connected to the third input terminal of the DC-DC power conversion circuit.
2. wide-voltage range direct current input switch power supply according to claim 1, which is characterized in that the power supply chip packet
Include the 4th resistance and the first trifocal regulated power supply, first input end of the one end of the 4th resistance as the power supply chip
It being connect with the anode of the power supply, the other end of the 4th resistance connects the input terminal of the first trifocal regulated power supply,
The ground terminal of the first trifocal regulated power supply connects as the second input terminal of the power supply chip and the negative terminal of the power supply
It connects, the output end of the first trifocal regulated power supply is connected to the 4th resistance and the first trifocal regulated power supply
Output end of the tie point of tie point, the 4th resistance and the first trifocal regulated power supply as the power supply chip.
3. wide-voltage range direct current input switch power supply according to claim 1, which is characterized in that the DC-DC power
Translation circuit includes switching circuitry, and the switching circuitry includes the armature winding of transformer, and one end of the armature winding is institute
The first input end for stating DC-DC power conversion circuit is connected with the anode of the power supply, and the other end of the armature winding is institute
The third input terminal for stating DC-DC power conversion circuit is connected with the output end of the pwm chip.
4. wide-voltage range direct current input switch power supply according to claim 3, which is characterized in that the DC-DC power
Translation circuit further includes absorbing circuit, the absorbing circuit include the 5th resistance, the 5th capacitor, the 4th diode, the described 5th
After resistance is in parallel with the 5th capacitor, one end is connected with the first input end of the DC-DC power conversion circuit, the other end with
The negative terminal of 4th diode is connected, and the third of the anode and the DC-DC power conversion circuit of the 4th diode is defeated
Enter end to be connected.
5. wide-voltage range direct current input switch power supply according to claim 3, which is characterized in that the DC-DC power
Translation circuit further includes voltage follower circuit, and the voltage follower circuit includes the first secondary windings of transformer, the one or two pole
Pipe, the second capacitor, one end of the first secondary windings of the transformer are connected with the anode of the first diode, the transformation
The other end of first secondary windings of device is grounded, output of the negative terminal of the first diode as the voltage follower circuit
End, the negative terminal of the first diode are also connected with one end of second capacitor, the other end ground connection of second capacitor.
6. wide-voltage range direct current input switch power supply according to claim 5, which is characterized in that the DC-DC power
Translation circuit further includes that operating voltage provides circuit, the operating voltage provide the second subprime winding that circuit includes transformer,
Second diode, third diode, third capacitor, the 4th capacitor, the 15th resistance, the second subprime winding of the transformer
One end is connected with the anode of second diode, and the other end of the second subprime winding of the transformer is as the DC-DC
Second input terminal of power conversion circuit is connected with the negative terminal of the power supply, the negative terminal of second diode and third electricity
One end of appearance is connected, and the other end of the third capacitor is connected with the second input terminal of the DC-DC power conversion circuit, described
The negative terminal of second diode is also connected with one end of the 15th resistance, and the other end of the 15th resistance is as the work
Make the output end of circuit for providing voltage, after the third diode is in parallel with the 4th capacitor, one end and the operating voltage
The output end for providing circuit is connected, and the other end is connected with the second input terminal of the DC-DC power conversion circuit, the PWM control
Coremaking piece further includes the 4th input terminal, and it is the 4th defeated to provide the output end of circuit and the pwm chip for the operating voltage
Enter end to be connected.
7. wide-voltage range direct current input switch power supply according to claim 6, which is characterized in that the DC-DC power
Translation circuit further includes PWM oscillator signal circuit, and the pwm chip further includes the 5th input terminal, the PWM oscillator signal
Circuit includes the 6th resistance, and one end of the 6th resistance is connected with the 5th input terminal of the pwm chip, and the described 6th
The other end of resistance is connected with the second input terminal of the DC-DC power conversion circuit.
8. wide-voltage range direct current input switch power supply according to claim 7, which is characterized in that the DC-DC power
Translation circuit further includes pressure stabilizing feedback network, and the pressure stabilizing feedback network includes optocoupler, the second trifocal regulated power supply, the 6th electricity
Appearance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, eleventh resistor, twelfth resistor, thirteenth resistor, the tenth
Four resistance, the output end phase that the light-emitting diodes tube anode of the optocoupler passes through the twelfth resistor and the voltage follower circuit
Even, the light-emitting diodes tube anode of the optocoupler is also connected with one end of the eleventh resistor, the eleventh resistor it is another
End is connected with the input terminal of the second trifocal regulated power supply, the ground terminal ground connection of the second trifocal regulated power supply, institute
The light-emitting diodes tube cathode for stating optocoupler is also connected with the input terminal of the second trifocal regulated power supply, and photosensitive the three of the optocoupler
The output end that the collector of pole pipe and the operating voltage provide circuit is connected, the emitter of the phototriode of the optocoupler and
One end of 9th resistance is connected, first output end of the other end of the 9th resistance as the pressure stabilizing feedback network,
One end of 8th resistance is connected with the other end of the 9th resistance, and the other end of the 8th resistance is as the pressure stabilizing
The second output terminal of feedback network, the emitter of the phototriode of the optocoupler also pass through the 7th resistance and the DC-
Second input terminal of DC power conversion circuit is connected, the output end of the second trifocal regulated power supply and the thirteenth resistor
One end be connected, the other end of the thirteenth resistor is connected with one end of the 6th capacitor, the 6th capacitor it is another
End be also connected with the input terminal of the second trifocal regulated power supply, the output end of the second trifocal regulated power supply also with institute
The one end for stating the 14th resistance is connected, and the other end of the 14th resistance is connected with the output end of the voltage follower circuit,
The output end of the second trifocal regulated power supply is also connected with one end of the tenth resistance, the other end of the tenth resistance
Ground connection, the pwm chip further includes the 6th input terminal and the 7th input terminal, the first output end of the pressure stabilizing feedback network
It is connected with the 6th input terminal of the pwm chip, the second output terminal of the pressure stabilizing feedback network and the PWM control core
7th input terminal of piece is connected.
9. wide-voltage range direct current input switch power supply according to claim 8, which is characterized in that the power supply is direct current
Input power, the pwm chip are the MP6002 of MPS company, have 8 pins, and the first of the pwm chip is defeated
Entering end is the 7th pin VIN, and the second input terminal is the 1st pin GND, and third input terminal is the 2nd pin LINE, and the 4th input terminal is
6th pin VCC, the 5th input terminal are the 5th pin RT, and the 6th input terminal is the 3rd pin FB, and the 7th input terminal is the 4th pin
COMP, output end are the 8th pin SW.
10. wide-voltage range direct current input switch power supply according to claim 1, which is characterized in that the Width funtion model
Enclosing direct current input switch power supply further includes first capacitor, and the first capacitor is connected between the anode and negative terminal of the power supply.
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| CN201910744723.5A CN110445395A (en) | 2019-08-13 | 2019-08-13 | Wide-voltage range direct current input switch power supply |
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Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1280414A (en) * | 1999-07-13 | 2001-01-17 | 布劳恩有限公司 | Choke converter |
| CN1397723A (en) * | 2001-07-13 | 2003-02-19 | 三菱电机株式会社 | Fault detecting circuit of fuel injection device |
| CN1992495A (en) * | 2005-12-20 | 2007-07-04 | 国际整流器公司 | Input voltage sensing circuit |
| CN201256282Y (en) * | 2008-08-01 | 2009-06-10 | 研祥智能科技股份有限公司 | High stability output overvoltage protection circuit |
| CN201600571U (en) * | 2010-01-09 | 2010-10-06 | 浙江中凯科技股份有限公司 | Control device of thermal relay test bench |
| CN101925217A (en) * | 2009-06-12 | 2010-12-22 | 海洋王照明科技股份有限公司 | LED constant current driving circuit |
| CN103295537A (en) * | 2013-05-08 | 2013-09-11 | 深圳市华星光电技术有限公司 | LED backlight driving circuit, backlight module and liquid crystal display device |
| US20150091466A1 (en) * | 2013-10-01 | 2015-04-02 | General Electric Company | Two-stage led driver with selectable dual output current |
| CN204833041U (en) * | 2015-08-10 | 2015-12-02 | 重庆宁来科贸有限公司 | Three -terminal steady voltage source can be monitored to wide region |
| CN106253672A (en) * | 2016-08-30 | 2016-12-21 | 浙江东和电子科技有限公司 | Electric motor car voltage conversion circuit |
| CN206038872U (en) * | 2016-09-08 | 2017-03-22 | 武汉杜曼智能科技有限公司 | Battery voltage supervisory circuit |
| CN206117500U (en) * | 2016-09-07 | 2017-04-19 | 广州金升阳科技有限公司 | PFC circuit, PFC control circuit and switching power supply |
| CN206498327U (en) * | 2017-02-13 | 2017-09-15 | 江苏斯菲尔电气股份有限公司 | The low-voltage dc power supply powered based on fire-fighting two lines bus |
| CN107919801A (en) * | 2017-12-11 | 2018-04-17 | 浙江正泰仪器仪表有限责任公司 | A kind of inverse-excitation type switch power-supply circuit |
| CN207835377U (en) * | 2018-01-12 | 2018-09-07 | 厦门格邦科技有限公司 | The driving plate that novel electric vehicle uses |
| US10172199B1 (en) * | 2017-06-30 | 2019-01-01 | Taizhou Jiaoguang Lighting Co., Ltd. | Light-actuated wide voltage range LED lamp driver circuit |
| CN109669504A (en) * | 2019-01-04 | 2019-04-23 | 西安微电子技术研究所 | A kind of TL431 is using power supply line's structure and method for stabilizing voltage and application |
| US10362644B1 (en) * | 2017-07-28 | 2019-07-23 | Universal Lighting Technologies, Inc. | Flyback converter with load condition control circuit |
| CN210405097U (en) * | 2019-08-13 | 2020-04-24 | 苏州格远电气有限公司 | Wide voltage range DC input switch power supply |
-
2019
- 2019-08-13 CN CN201910744723.5A patent/CN110445395A/en active Pending
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1280414A (en) * | 1999-07-13 | 2001-01-17 | 布劳恩有限公司 | Choke converter |
| CN1397723A (en) * | 2001-07-13 | 2003-02-19 | 三菱电机株式会社 | Fault detecting circuit of fuel injection device |
| CN1992495A (en) * | 2005-12-20 | 2007-07-04 | 国际整流器公司 | Input voltage sensing circuit |
| CN201256282Y (en) * | 2008-08-01 | 2009-06-10 | 研祥智能科技股份有限公司 | High stability output overvoltage protection circuit |
| CN101925217A (en) * | 2009-06-12 | 2010-12-22 | 海洋王照明科技股份有限公司 | LED constant current driving circuit |
| CN201600571U (en) * | 2010-01-09 | 2010-10-06 | 浙江中凯科技股份有限公司 | Control device of thermal relay test bench |
| CN103295537A (en) * | 2013-05-08 | 2013-09-11 | 深圳市华星光电技术有限公司 | LED backlight driving circuit, backlight module and liquid crystal display device |
| US20150091466A1 (en) * | 2013-10-01 | 2015-04-02 | General Electric Company | Two-stage led driver with selectable dual output current |
| CN204833041U (en) * | 2015-08-10 | 2015-12-02 | 重庆宁来科贸有限公司 | Three -terminal steady voltage source can be monitored to wide region |
| CN106253672A (en) * | 2016-08-30 | 2016-12-21 | 浙江东和电子科技有限公司 | Electric motor car voltage conversion circuit |
| CN206117500U (en) * | 2016-09-07 | 2017-04-19 | 广州金升阳科技有限公司 | PFC circuit, PFC control circuit and switching power supply |
| CN206038872U (en) * | 2016-09-08 | 2017-03-22 | 武汉杜曼智能科技有限公司 | Battery voltage supervisory circuit |
| CN206498327U (en) * | 2017-02-13 | 2017-09-15 | 江苏斯菲尔电气股份有限公司 | The low-voltage dc power supply powered based on fire-fighting two lines bus |
| US10172199B1 (en) * | 2017-06-30 | 2019-01-01 | Taizhou Jiaoguang Lighting Co., Ltd. | Light-actuated wide voltage range LED lamp driver circuit |
| US10362644B1 (en) * | 2017-07-28 | 2019-07-23 | Universal Lighting Technologies, Inc. | Flyback converter with load condition control circuit |
| CN107919801A (en) * | 2017-12-11 | 2018-04-17 | 浙江正泰仪器仪表有限责任公司 | A kind of inverse-excitation type switch power-supply circuit |
| CN207835377U (en) * | 2018-01-12 | 2018-09-07 | 厦门格邦科技有限公司 | The driving plate that novel electric vehicle uses |
| CN109669504A (en) * | 2019-01-04 | 2019-04-23 | 西安微电子技术研究所 | A kind of TL431 is using power supply line's structure and method for stabilizing voltage and application |
| CN210405097U (en) * | 2019-08-13 | 2020-04-24 | 苏州格远电气有限公司 | Wide voltage range DC input switch power supply |
Non-Patent Citations (1)
| Title |
|---|
| 佚名: ""EV6002DN-00A Monolithic Flyback/Forward DC-DC Converter Evaluation Board"", "HTTPS:https://DISTRIBUTOR.ALLDATASHEETCN.COM/VIEW.JSP?SEARCHWORD=MP6002", 20 July 2009 (2009-07-20), pages 1 - 5 * |
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