CN107623440A - Voltage conversion circuit and power supply switch circuit - Google Patents
Voltage conversion circuit and power supply switch circuit Download PDFInfo
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- CN107623440A CN107623440A CN201710891556.8A CN201710891556A CN107623440A CN 107623440 A CN107623440 A CN 107623440A CN 201710891556 A CN201710891556 A CN 201710891556A CN 107623440 A CN107623440 A CN 107623440A
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Abstract
The embodiment of the invention discloses a kind of voltage conversion circuit and power supply switch circuit, the voltage conversion circuit is by combining inductance type DC converting circuit and condenser type DC converting circuit, to being exported after the corresponding positive/negative-pressure amplification of direct current signal progress of input；The power supply switch circuit controls the break-make of two switch modules by pulse signal, and then controls the output of generating positive and negative voltage.The embodiment of the present invention can reduce the power consumption of voltage conversion circuit, while realize the flexible and changeable property of voltage conversion by using inductance type DC converting circuit and positive charge pump circuit and negative charge pump circuit.
Description
Technical field
The present embodiments relate to circuit engineering, more particularly to a kind of voltage conversion circuit and power supply switch circuit.
Background technology
Non-isolated power supply refers to not over transformer be isolated between input and load end, but directly will input
End and load end are altogether.Because non-isolated power supply has the advantages that cost is low, simple, index is high, and be widely used with direct current/
Direct current (DC-DC) switchable power supply circuit.
Existing non-isolation DC-DC switching power converters utilize electric current in inductance to be mutated with electric capacity both end voltage not
The characteristic that can be mutated, and inductance or electric capacity can be used as energy-storage travelling wave tube.Storage of the generally use switching tube to electric energy in circuit
It is controlled with release, when switching tube turns on, the power storage of input is in inductance or electric capacity；And when switching tube ends,
The energy being stored in inductance or electric capacity is released to load.Therefore, non-isolation DC-DC switching power converters can be divided into inductance
Formula DC-DC switching power converters and condenser type DC-DC switching power converters.Wherein, inductance type DC-DC Switching Power Supplies convert
Device includes the BUCK types DC-DC of decompression, the BOOST types DC-DC of boosting, the BUCK-BOOST types DC-DC and malleation of buck
Turn INVERTOR types DC-DC of negative pressure etc.；It is to utilize principle of charge conservation and capacitance-type switch power supply is called and makees charge pump circuit
A kind of Switching Power Supply of work, stores energy, electric charge during the charge/discharge by switching controlling pump electric capacity using pump electric capacity
Transfer, it has the characteristics that small volume, circuit structure are simple, low in energy consumption.
It is this by changing transformer coil but existing DC Switching Power Supplies conversion uses isolating transformer scheme
The turn ratio obtains boosting multiple proportions, then obtains malleation (same polarity), negative pressure (antipole by primary and secondary coil reversing
Property) conversion output, and wherein used transformer coil is not general so that switching power converters underaction is changeable, and
Power consumption is higher.
The content of the invention
In view of this, it is existing to solve the embodiments of the invention provide a kind of voltage conversion circuit and power supply switch circuit
The problem of non-isolated DC-DC power source converter underaction is changeable in technology.
In a first aspect, the embodiments of the invention provide a kind of voltage conversion circuit, including：Inductance type DC converting circuit,
Condenser type DC converting circuit, positive voltage signal output end and negative voltage signal output end；
The condenser type DC converting circuit includes positive charge pump circuit and negative charge pump circuit, the positive charge pump circuit
Power supply signal input electrically connected with the power supply signal output end of the inductance type DC converting circuit, positive charge pump electricity
The power supply signal output end on road electrically connects with the positive voltage signal output end, and the ground connection termination of the positive charge pump circuit
Ground, the power supply signal input of the negative charge pump circuit and the power supply signal output end electricity of the inductance type DC converting circuit
Connection, the power output end of the negative charge pump circuit electrically connects with the negative voltage signal output end, and the negative electrical charge
The earth terminal ground connection of pump circuit；
The power supply signal input of the inductance type direct current conversion circuit is electrically connected with dc source and enable signal is defeated
Enter end to electrically connect with pulse voltage signal source.
Optionally, the inductance type DC converting circuit includes：First resistor, second resistance, 3rd resistor, the first electricity
Appearance, the second electric capacity, the 3rd electric capacity, inductance, Schottky diode and boost chip；
The first end of the first resistor electrically connects with the dc source and the second end and the boost chip make
The electrical connection of energy end, the Enable Pin of the boost chip electrically connect with pulse voltage signal source；
The first end of first electric capacity is electrically connected with the dc source and the second end ground connection, second electric capacity
First end electrically connected with the dc source and the second end electrically connects with the second end of first electric capacity；
The first end of the inductance is electrically connected with the dc source and the second end and the switch terminals of the boost chip
Electrical connection；
The first end of the Schottky diode electrically connects with the second end of the inductance, the first end of the 3rd electric capacity
Electrically connected with the second end of the Schottky diode and the second end is grounded by the 3rd resistor, the second resistance
First end electrically connected with the second end of the Schottky diode and the second end is grounded by the 3rd resistor；
The power supply signal input of the boost chip electrically connects with the dc source, pressure feedback port passes through described
Three resistance eutral groundings and earth terminal ground connection.
Optionally, the positive charge pump circuit includes：First diode, the second diode, the 4th electric capacity, the 5th electric capacity,
6th electric capacity, the 7th electric capacity, the 8th electric capacity, the 4th resistance, the 5th resistance and the 6th resistance；
The first end of first diode is electrically connected by the second end of the 4th resistance and the Schottky diode
Connecing, the second end of first diode electrically connects with the first end of second diode, and the second of second diode
End is electrically connected by the 5th resistance with the positive voltage signal output end；
The first end of 6th resistance electrically connected by the 5th resistance with the second end of second diode, with
And second end ground connection；
The first end of 4th electric capacity is electrically connected with the switch terminals of the boost chip and the second end and described first
The second end electrical connection of diode；
The first end of 5th electric capacity is electrically connected with the second end of second diode and the second end and Xiao
The second end electrical connection of special based diode, the first end of the 6th electric capacity and the second end of the Schottky diode are electrically connected
Connect and the second end is grounded；
The first end of 7th electric capacity electrically connected by the 5th resistance with the second end of second diode, with
And the second end ground connection, the first end of the 8th electric capacity is electrically connected by the second end of the 5th resistance and second diode
Connect and the second end electrically connects with the second end of the 7th electric capacity.
Optionally, the negative charge pump circuit includes：3rd diode, the 4th diode, the 5th diode, the six or two pole
Pipe, the 9th electric capacity, the tenth electric capacity, the 11st electric capacity, the 12nd electric capacity, the 13rd electric capacity, the 14th electric capacity, the 7th resistance, with
And the 8th resistance；
The first end of 3rd diode is electrically connected with the second end of the 4th diode and the second end ground connection,
The first end of 4th diode electrically connects with the second end of the 5th diode, the first end of the 5th diode with
The second end electrical connection of 6th diode, the first end of the 6th diode pass through the 7th resistance and the negative electricity
Press signal output part electrical connection；
The first end of 8th resistance electrically connected by the 7th resistance with the first end of the 6th diode, with
And second end ground connection；
The first end of 9th electric capacity is electrically connected with the switch terminals of the boost chip and the second end and the described 3rd
The first end electrical connection of diode, the first end of the tenth electric capacity electrically connects with the switch terminals of the boost chip, Yi Ji
Two ends electrically connect with the second end of the 5th diode；
The first end of 11st electric capacity electrically connected with the first end of the 6th diode and the second end with it is described
The first end electrical connection of 4th diode, the first end of the 12nd electric capacity and the second end of the 11st electric capacity are electrically connected
Connect and the second end is grounded；
The first end of 13rd electric capacity electrically connected by the 7th resistance with the first end of the 6th diode,
And the second end ground connection, the first end of the 14th electric capacity pass through the first end of the 7th resistance and the 6th diode
Electrical connection and the second end electrically connect with the second end of the 13rd electric capacity.
The second aspect embodiment of the present invention additionally provides a kind of power supply switch circuit, including：First switch module, second open
Close module, pulse signal input terminal, voltage signal output end and above-mentioned voltage conversion circuit；
The control terminal of the first switch module electrically connects with the pulse signal input terminal, voltage signal inputs and institute
The electrical connection of positive voltage signal output end and output end for stating voltage conversion circuit electrically connect with the voltage signal output end；
The control terminal of the second switch module electrically connects with the pulse signal input terminal, power supply signal input with it is straight
Flow power electric connection, voltage signal inputs electrically connect with the negative voltage signal output end of the voltage conversion circuit and defeated
Go out end to electrically connect with the voltage signal output end.
Optionally, the first switch module includes：First triode, the second triode, the 9th resistance and the tenth electricity
Resistance；
The control terminal of first triode is electrically connected by the 9th resistance with the pulse signal input terminal, first electrode
Electrically connected by the tenth resistance with the control terminal of second triode and second electrode is grounded；
The first electrode of second triode electrically connects with the positive voltage signal output end of the power-switching circuit, with
And second electrode electrically connects with the voltage signal output end.
Optionally, first triode is NPN type triode, and second triode is PNP type triode.
Optionally, the second switch module includes：3rd triode, the 4th triode, the 11st resistance, the 12nd electricity
Resistance and the 15th electric capacity；
The control terminal of 3rd triode is electrically connected by the 11st resistance with the pulse signal input terminal,
The control that one electrode electrically connects with the dc source and second electrode passes through the 12nd resistance and the 4th triode
End electrical connection processed；
The first electrode of 4th triode electrically connected with the voltage signal output end and second electrode with it is described
The negative voltage signal output end electrical connection of power-switching circuit；
The first end of 15th electric capacity is electrically connected with the dc source and the second end ground connection.
Optionally, the 3rd triode is PNP type triode, and the 4th triode is NPN type triode.
Optionally, the circuit also includes：13rd resistance, first voltage signal testing end, second voltage signal testing
End；
The first end of 13rd resistance respectively with the voltage signal output end and the first voltage signal testing
End electrical connection and the second end electrically connect and are grounded with the second voltage signal testing end.
The embodiments of the invention provide a kind of voltage conversion circuit and power supply switch circuit, the voltage conversion circuit passes through knot
Inductance type DC converting circuit and condenser type DC converting circuit are closed, corresponding positive/negative-pressure amplification is carried out to the direct current signal of input
After export；The power supply switch circuit controls the break-make of two switch modules by pulse signal, and then controls the defeated of generating positive and negative voltage
Go out.The embodiment of the present invention can solve the problem that Power convert is by the way of isolating transformer in the prior art, by changing transformer
The turn ratio of coil obtains corresponding boosting multiple proportions, causes the inadequate universal flexible of the transformer coil used in circuit, and work(
Consume high technical problem.The embodiment of the present invention is by using inductance type DC converting circuit and positive charge pump circuit and negative electrical charge
Pump circuit, the power consumption of voltage conversion circuit can be reduced, realize flexibility and the versatility of voltage conversion.
Brief description of the drawings
Fig. 1 is a kind of structural representation for voltage conversion circuit that the embodiment of the present invention one provides；
Fig. 2 is a kind of physical circuit figure for voltage conversion circuit that the embodiment of the present invention two provides；
Fig. 3 is a kind of structural representation for power supply switch circuit that the embodiment of the present invention three provides；
Fig. 4 is a kind of physical circuit figure for power supply switch circuit that the embodiment of the present invention four provides；
Fig. 5 is the physical circuit figure of another power supply switch circuit provided in an embodiment of the present invention.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that in order to just
Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.
Embodiment one
Fig. 1 be the embodiment of the present invention one provide a kind of voltage conversion circuit structural representation, the voltage conversion circuit
The voltage signal of input can be changed accordingly.As shown in figure 1, the voltage conversion circuit includes：Inductance type direct current turns
Change circuit 100, condenser type DC converting circuit 200, positive voltage signal output end vo ut+ and negative voltage signal output end
Vout-, and condenser type DC converting circuit 200 includes positive charge pump circuit 210 and negative charge pump circuit 220.
Wherein, the power supply signal input of positive charge pump circuit 210 and the power supply signal of inductance type DC converting circuit 100
Output end electrically connects, and the power supply signal output end of positive charge pump circuit 210 electrically connects with positive voltage signal output end vo ut+, with
And the earth terminal ground connection of positive charge pump circuit 210；The power supply signal input of negative charge pump circuit 220 is changed with inductance type direct current
The power supply signal output end electrical connection of circuit 100, power output end and the negative voltage signal output end of negative charge pump circuit 220
Vout- is electrically connected, and the earth terminal ground connection of negative charge pump circuit 220；And the power supply signal of inductance type direct current conversion circuit 100
Input electrically connects with dc source VDD, the enable signal input and pulse voltage signal of inductance type direct current conversion circuit 100
Source PWM is electrically connected.
Due to equipment in the case of different application, it is necessary to using different voltage, to realize corresponding application.Thus in crowd
Voltage conversion circuit is usually provided with more application circuits, so that equipment realizes corresponding application according to output voltage.For example,
In mobile phone application circuit, it usually needs booster circuit drives sudden strain of a muscle to turn off the light module or the LED of display backlight, and needs according to not
Demand with the case of, LED bright-dark degree is adjusted, LED drive circuit can be divided into charge pump times piezoelectricity in the prior art
Road and inductive type DC-DC voltage up converting circuit, the implementation of both circuits respectively have advantage and disadvantage.For charge pump times piezoelectricity
Road, conversion at double can only be carried out to input voltage, this allows for voltage conversion underaction, and inductive type DC-DC boostings are electric
Road can realize that the non-of magnitude of voltage is changed at double, but can not realize the upset of magnitude of voltage after boosting, i.e., can not realize positive/negative-pressure
Driving output.
Power-switching circuit in the embodiment of the present invention, by the way that the dc source VCC of input is changed into electricity through inductance type direct current
Road 100 obtains first voltage value Vout1 after being changed accordingly, then passes through the positive electricity in condenser type DC converting circuit 200
Lotus pump circuit 210 carries out positive multiplication of voltage to first voltage value Vout1 and changed, so as to be exported by positive voltage signal output end vo ut+
Positive magnitude of voltage；Or first voltage value Vout1 is entered by the negative charge pump circuit 220 in condenser type DC converting circuit 200
The negative multiplication of voltage conversion of row, so that negative voltage signal output end vo ut- can export negative magnitude of voltage, to meet Power convert most
Output demand eventually.
The embodiment of the present invention passes through electricity by the way that inductance type DC converting circuit and condenser type DC converting circuit are combined
After sense formula DC converting circuit is changed to supply voltage, then by the positive charge pump circuit in condenser type direct current conversion circuit and
Negative charge pump circuit, so as to obtain the positive voltage and negative voltage of non-multiplication of voltage conversion, realizes power supply to the voltage conversion after conversion
The flexibility of change-over circuit and versatility, while the circuit possesses the characteristics of miniaturization, low-power consumption.
Embodiment two
Fig. 2 is a kind of physical circuit figure of power-switching circuit provided in an embodiment of the present invention.The present embodiment is in above-mentioned reality
Apply and embodied on the basis of example, there is provided a kind of specific circuit diagram.With reference to shown in Fig. 1 and Fig. 2, inductance type direct current turns
Changing circuit 100 includes first resistor R1, second resistance R2,3rd resistor R3, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity
C3, inductance LC, Schottky diode SD and boost chip UI.Wherein, first resistor R1 first end and the dc source
Electrical connection, first resistor R1 the second end electrically connects with boost chip UI Enable Pin, and boost chip UI Enable Pin and arteries and veins
Rush voltage signal source PWM electrical connections；First electric capacity C1 first end electrically connects with the dc source, and the second of the first electric capacity C1
End ground connection, and the second electric capacity C2 first end electrically connects with the dc source, the second electric capacity C2 the second end and the first electric capacity
C1 the second end electrical connection；Inductance LC first end electrically connects with dc source VDD, inductance LC the second end and the boosting core
The switch terminals electrical connection of piece；Schottky diode SD first end electrically connects with inductance LC the second end, and the of the 3rd electric capacity C3
One end is electrically connected with Schottky diode SD the second end, and the 3rd electric capacity C3 the second end is grounded by 3rd resistor R3, and second
Resistance R2 first end electrically connects with Schottky diode SD the second end, and second resistance R2 the second end is again by the 3rd electricity
Hinder R3 ground connection；In addition, boost chip UI power supply signal input electrically connects with dc source VDD, boost chip UI voltage
Feedback end is grounded by 3rd resistor R3, and boost chip UI earth terminal ground connection.
Using inductance LC as energy-storage travelling wave tube in inductance type DC converting circuit 100, specific work process is divided into energy storage (i.e.
Charging) and voltage output (discharging).In thermal energy storage process, boost chip UI Enable Pin input pulse signal PWM, due to Xiao
Special based diode SD on state characteristic so that inductance LC is stored in the presence of boost chip to the electric current passed through, to enter
Row energy storage；And when pwm signal is overturn, Schottky diode SD conductings, the electric current that now inductance LC is stored passes through Schottky
Diode SD is exported.Wherein, 3rd resistor R3 can feed back to the voltage signal in boost chip UI, and first resistor R1
Partial pressure is carried out to the main flow power vd D of input, second resistance R2 carries out partial pressure to the voltage signal exported.It is further, since electric
There is certain electromagnetic interference etc. in sense formula DC converting circuit 100, thus need to be filtered the signal for inputting and exporting
Processing, processing can be filtered to the dc source VDD of input using the first electric capacity C1 and the second electric capacity C2, and use the 3rd electricity
Hold C3 and processing is filtered to the voltage signal Vout1 of output.For example, when the dc source VDD of input is 3.3V, through the electricity
Sense formula DC converting circuit 100 can obtain 7.5V output voltage Vout1 after being boosted.
The connected mode of divider resistance and filter capacitor employed in the embodiment of the present invention is exemplary to this programme
Explanation, not limit and this, for that can realize that the other of the Power convert mode described in the embodiment of the present invention specifically show
The circuit of example property belongs to the protection domain of the embodiment of the present invention.
Positive charge pump circuit 210 includes the first diode D1, the second diode D2, the 4th electric capacity C4, the 5th electric capacity C5, the
Six electric capacity C6, the 7th electric capacity C7, the 8th electric capacity C8, the 4th resistance R4, the 5th resistance R5 and the 6th resistance R6.Wherein, first
Diode D1 first end is electrically connected by the 4th resistance R4 with Schottky diode SD the second end, and the of the first diode D1
Two ends electrically connect with the second diode D2 first end, and the second diode D2 the second end passes through the 5th resistance and positive voltage signal
Output end vo ut+ is electrically connected；6th resistance R6 first end is electrically connected by the 5th resistance R5 and the second diode D2 the second end
Connect, and the 6th resistance R6 the second end ground connection；4th electric capacity C4 first end electrically connects with boost chip UI switch terminals, with
And the 4th electric capacity C4 the second end electrically connected with the first diode D1 the second end；5th electric capacity C5 first end and the two or two pole
Pipe D2 the second end electrical connection, the 5th electric capacity C5 the second end electrically connect with Schottky diode SD the second end, the 6th electric capacity
C6 first end electrically connects with Schottky diode SD the second end, and the 6th electric capacity C6 the second end ground connection；7th electric capacity
C7 first end is electrically connected by the 5th resistance R5 with the second diode D2 the second end, and the 7th electric capacity C7 the second termination
Ground, the 8th electric capacity C8 first end are electrically connected by the 5th resistance R5 with 5 second diode D2 the second end, the 8th electric capacity C8's
Second end electrically connects with the second end of the 7th electric capacity.
Condenser type DC converting circuit 200 is using electric capacity as energy-storage travelling wave tube, and wherein positive charge pump circuit 210 is to being inputted
Voltage signal in positive multiple boost.The 4th electric capacity C4 is as energy-storage travelling wave tube in positive charge pump circuit 210, with straight to inductance type
The voltage Vout1 exported in current circuit is boosted.Because the positive charge pump circuit 210 has the electric capacity of energy-storage travelling wave tube the 4th
C4, thus the voltage by being exported after the positive charge pump circuit 210 differs one times with input voltage.As above in example, inductance type is worked as
When the voltage Vout1 that DC converting circuit 100 exports is 7.5V, then voltage positive after the boosting of positive charge pump circuit 210 is believed
The magnitude of voltage of number output end vo ut+ output is+15V.Wherein the first end of diode can be the anode of diode, and the second end
It is then the negative electrode of diode.
Negative charge pump circuit 220 includes the 3rd diode D3, the 4th diode D4, the 5th diode D5, the 6th diode
D6, the 9th electric capacity C9, the tenth electric capacity C10, the 11st electric capacity C11, the 12nd electric capacity C12, the 13rd electric capacity C13, the 14th electricity
Hold C14, the 7th resistance R7 and the 8th resistance R8,.Wherein, the 3rd diode D3 first end and the 4th diode
Second end electrically connects, and the 3rd diode D3 the second end ground connection, the 4th diode D4 first end and the 5th diode D5
The electrical connection of the second end, the 5th diode D5 first end electrically connects with the 6th diode D6 the second end, the 6th diode D6
First end electrically connected by the 7th resistance R7 with negative voltage signal output end vo ut-；8th resistance R8 first end passes through
Seven resistance R7 electrically connect with the 6th diode D6 first end, and the 8th resistance R8 the second end ground connection；9th electric capacity C9's
First end electrically connects with boost chip UI switch terminals, and the 9th electric capacity C9 the second end and the 3rd diode D3 first end are electrically connected
Connect, the tenth electric capacity C10 first end electrically connects with boost chip UI switch terminals, the tenth electric capacity C10 the second end and the five or two
Pole pipe D5 the second end electrical connection；11st electric capacity C11 first end electrically connects with the 6th diode D6 first end, and the 11st
Electric capacity C11 the second end electrically connects with the 4th diode D4 first end, the 12nd electric capacity C12 first end and the 11st electric capacity
C11 the second end electrical connection, the 12nd electric capacity C12 the second end ground connection；13rd electric capacity C13 first end passes through the 7th resistance
Electrically connected with the first end of the 6th diode and the second end ground connection, the first end of the 14th electric capacity pass through described
7th resistance electrically connects with the first end of the 6th diode and the second end and the second end of the 13rd electric capacity are electrically connected
Connect.
Energy storage is carried out using the 9th electric capacity C9 and the 10th electric capacity C10 in negative charge pump circuit 220, thus passes through negative electrical charge
Magnitude of voltage is 2 times of input voltage value after pump circuit 220 is boosted.As above in example, for inductance type DC voltage booster circuit 100
Output voltage Vout1 be 7.5V situation, through the 9th electric capacity C9 carry out power storage after, then the 3rd diode D3 through reversal connection and
4th diode D4 so that the 4th diode D4 the second terminal voltage is changed into -7.5V；Tenth electric capacity C10 can equally store electric energy,
After the 5th diode D5 and the 6th diode D6 by reversal connection so that magnitude of voltage is double herein, final negative voltage signal
Exportable-the 15V of output end vo ut- magnitude of voltage.Similarly, the first end of diode can be considered as to the anode of diode, second
End is considered as the negative electrode of diode, is not difficult to be inferred to by the on state characteristic of diode, the boosting principle of the negative charge pump circuit 220.
The embodiment of the present invention is by specific circuit components to inductance type DC voltage booster circuit and condenser type DC boosting
Circuit is embodied, it is possible thereby to further illustrate that power-switching circuit provided in an embodiment of the present invention can obtain non-times
The positive/negative voltage signal of conversion is pressed, so as to realize the flexibility of Power convert and versatility, and with miniaturization and low-power consumption
Feature.
Embodiment three
Fig. 3 be the embodiment of the present invention three provide a kind of power supply switch circuit structural representation, the power supply switch circuit
Suitable for situation about flexibly being switched to different input powers.As shown in figure 3, the power supply switch circuit includes：First switch
Module 310, second switch module 320, pulse signal input terminal PWM, voltage signal output end Vout and the embodiment of the present invention
The voltage conversion circuit of offer.
Wherein, the control terminal of first switch module 310 electrically connects with pulse signal input terminal PWM, first switch module 310
Voltage signal inputs be electrically connected with positive voltage signal output end vo ut+ in voltage conversion circuit provided in an embodiment of the present invention
Connect, the output end of first switch module 310 electrically connects with voltage signal output end Vout；The control terminal of second switch module 320
Being electrically connected with pulse signal input terminal PWM, the power supply signal input of second switch module 320 electrically connects with dc source VDD,
The negative voltage signal of the voltage signal inputs of second switch module 320 and voltage conversion circuit provided in an embodiment of the present invention is defeated
Go out to hold Vout- to electrically connect, the output end of second switch module 320 electrically connects with voltage signal output end Vout.
Power supply switch circuit can switch over to inputting the power supply in the circuit, can be divided between different power supply roads
Switching between switching and different output voltages.Can be when event occurs for a power supply road for the switching between the different roads that power
During barrier, another power supply circuit is can switch to, to ensure the normal operation of equipment；And for the switching between varying voltage signal,
It can be switched over according to specific applicable cases.For example, when display picture needs to realize picture by different voltage switchings
, can be by switching over output voltage signal to realize during complete display.
Power supply switch circuit provided in an embodiment of the present invention, for defeated in power-switching circuit provided in an embodiment of the present invention
Switching between the positive voltage and negative voltage that go out.The power supply switch circuit includes first switch module 310, and it can be believed by pulse
The pulse signal of number input PWM input is controlled, to realize to positive voltage signal output end vo ut+ in power-switching circuit
Whether the conducting of the positive voltage signal of output is controlled.Accordingly, the second switch module 320 in the power supply switch circuit is logical
The control of the pulse signal of extra pulse signal input part PWM inputs and the dc source VDD of power supply signal input input, it is real
Now whether the conducting to the negative voltage signals exported of negative voltage signal output end vo ut- in power-switching circuit is controlled, most
The switching between generating positive and negative voltage is realized eventually.
Power supply switch circuit provided in an embodiment of the present invention is by using pulse signal and DC power signal, control first
The break-make of switch module and second switch module, so as to use simple mode, realize the flexible of output voltage in circuit
Switching.
Example IV
Fig. 4 is a kind of physical circuit figure for power supply switch circuit that the embodiment of the present invention four provides, and the present embodiment is above-mentioned
Embodied on the basis of embodiment, there is provided the circuit diagram of specific power supply switch circuit.With reference to shown in Fig. 3 and Fig. 4,
First switch module 310 includes in power supply switch circuit provided in an embodiment of the present invention：First triode Q1, the second triode
Q2, the 9th resistance R9 and the tenth resistance R10.Wherein, the first triode Q1 control terminal is believed by the 9th resistance R9 and pulse
Number input PWM electrical connection, it is electric that the first triode Q1 first electrode passes through the control terminal of the tenth resistance R10 and the second triode
Connection, and the first triode Q1 second electrode ground connection；Second triode Q2 first electrode and power-switching circuit is just
Voltage signal output end Vout+ is electrically connected, and the second triode Q2 second electrode electrically connects with voltage signal output end Vout.
In first switch module 310, the pulse signal inputted by pulse signal input terminal PWM controls the first triode
Q1 break-make, then the signal of the output of the first triode Q1 second electrodes output end by turning on control leading to for the second triode Q2
It is disconnected, it is controlled so as to realize whether to export positive voltage signal.Wherein, when the second triode Q2 is turned on, positive voltage signal
Output end vo ut+ voltage signal could be used as output voltage, be exported by voltage signal output end Vout.And the 9th resistance R9 and
Tenth resistance R10 is used to carry out current limliting to the electric signal in circuit, occurs to prevent short circuit.If it is preferably by the first triode Q1
NPN type triode, when the second triode Q2 is preferably PNP type triode, when the pulse signal of pulse signal input terminal PWM inputs
For high level signal when, the first triode Q1 conductings, and then the emitter stage for the first triode Q1 for passing through conducting is by the low of ground connection
Level signal is transmitted to the second triode Q2 base stage, so that the second triode Q2 is turned on, and then causes positive voltage signal output
The positive voltage signal of Vout+ outputs is held to be exported as output voltage by voltage signal output end Vout.
Accordingly, second switch module 320 includes the 3rd triode Q3, the 4th triode Q4, the 11st resistance R11, the
12 resistance R12 and the 15th electric capacity C15.Wherein, the 3rd triode Q3 control terminal passes through the 11st resistance R11 and arteries and veins
Signal input part PWM electrical connections are rushed, the 3rd triode Q3 first electrode electrically connects with dc source VDD, the 3rd triode Q3
Second electrode electrically connected by the 12nd resistance R12 with the 4th triode Q4 control terminal；4th triode Q4 the first electricity
Pole electrically connects with voltage signal output end, and the 4th triode Q4 second electrode and the negative voltage signal of power-switching circuit export
Hold Vout- electrical connections；15th electric capacity C15 first end electrically connects with dc source VDD, and the of the 15th electric capacity C15
Two ends are grounded.
In second switch module 320, the pulse signal inputted by pulse signal input terminal PWM controls the 3rd triode
Q3 break-make, to enable DC power signal VDD to be transmitted by the first electrode and second electrode of the 3rd triode to the 4th
Triode Q4 control terminal, to control the 4th triode Q4 break-make, controlled so as to realize whether to export negative voltage signal
System.Wherein, when the 4th triode Q4 is turned on, negative voltage signal output end vo ut- voltage signal could be used as output voltage,
Exported by voltage signal output end Vout.And the 11st resistance R11 and the 12nd resistance R12 is used to enter the electric signal in circuit
Row current limliting, occur to prevent short circuit, the 15th electric capacity C15 is used to be filtered the power supply signal VDD of input.If by the three or three pole
Pipe Q3 is preferably PNP type triode, when the 4th triode Q4 is preferably NPN type triode, when pulse signal input terminal PWM is inputted
Pulse signal when being low level signal, the 3rd triode Q3 conductings, and then the colelctor electrode for the 3rd triode Q3 for passing through conducting
The power supply signal VDD of high level is transmitted to the 4th triode Q4 base stage, so that the 4th triode Q4 is turned on, and then caused negative
The negative voltage signal of voltage signal output end Vout- outputs is exported as output voltage by voltage signal output end Vout.
Optionally, Fig. 5 is the physical circuit figure of another power supply switch circuit provided in an embodiment of the present invention.Such as Fig. 5 institutes
Show, power supply switch circuit provided in an embodiment of the present invention also includes：13rd resistance R13, first voltage signal testing end
Check1 and second voltage signal testing end check2.Wherein, the 13rd resistance R13 first end exports with voltage signal respectively
Vout and first voltage signal testing end check1 electrical connections are held, the 13rd resistance R13 the second end and second voltage signal are surveyed
Examination end check2 is electrically connected and is grounded.So as to carry out voltage division processing to the voltage of output by the 13rd resistance R13, and pass through the
One voltage signal test lead check1 and second voltage signal testing end check2 detects exported voltage signal.
This hair embodiment by being embodied to the first switch module in power supply switch circuit and second switch module,
Flexible switching in circuit between voltage signal is realized using triode, reduce further the power consumption of power supply switch circuit, with
And realize the miniaturization of power supply switch circuit.
In addition, it above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although being carried out by above example to the present invention
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other more equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (10)
- A kind of 1. voltage conversion circuit, it is characterised in that including：Inductance type DC converting circuit, condenser type DC converting circuit, Positive voltage signal output end and negative voltage signal output end；The condenser type DC converting circuit includes positive charge pump circuit and negative charge pump circuit, the electricity of the positive charge pump circuit Source signal input electrically connects with the power supply signal output end of the inductance type DC converting circuit, the positive charge pump circuit Power supply signal output end electrically connects with the positive voltage signal output end, and the earth terminal ground connection of the positive charge pump circuit, The power supply signal input of the negative charge pump circuit and the power supply signal output end of the inductance type DC converting circuit are electrically connected Connect, the power output end of the negative charge pump circuit electrically connects with the negative voltage signal output end, and the negative charge pump The earth terminal ground connection of circuit；The power supply signal input of the inductance type direct current conversion circuit is electrically connected with dc source and enable signal input Electrically connected with pulse voltage signal source.
- 2. circuit according to claim 1, it is characterised in that the inductance type DC converting circuit includes：First resistor, Second resistance, 3rd resistor, the first electric capacity, the second electric capacity, the 3rd electric capacity, inductance, Schottky diode and boost chip；The first end of the first resistor is electrically connected with the dc source and the second end and the Enable Pin of the boost chip Electrical connection, the Enable Pin of the boost chip electrically connect with pulse voltage signal source；The first end of first electric capacity is electrically connected with the dc source and the second end ground connection, and the of second electric capacity One end electrically connects with the dc source and the second end electrically connects with the second end of first electric capacity；The first end of the inductance electrically connects with the dc source and the second end and the switch terminals of the boost chip are electrically connected Connect；The first end of the Schottky diode electrically connects with the second end of the inductance, the first end of the 3rd electric capacity and institute The electrical connection of the second end and the second end for stating Schottky diode are grounded by the 3rd resistor, and the of the second resistance One end is electrically connected with the second end of the Schottky diode and the second end is grounded by the 3rd resistor；The power supply signal input of the boost chip electrically connects with the dc source, pressure feedback port passes through the described 3rd electricity Resistance ground connection and earth terminal ground connection.
- 3. circuit according to claim 2, it is characterised in that the positive charge pump circuit includes：First diode, second Diode, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, the 4th resistance, the 5th resistance, Yi Ji Six resistance；The first end of first diode is electrically connected by the 4th resistance with the second end of the Schottky diode, institute The second end for stating the first diode electrically connects with the first end of second diode, and the second end of second diode passes through 5th resistance electrically connects with the positive voltage signal output end；The first end of 6th resistance is electrically connected by the 5th resistance with the second end of second diode, Yi Ji Two ends are grounded；The first end of 4th electric capacity is electrically connected with the switch terminals of the boost chip and the second end and the one or two pole The second end electrical connection of pipe；The first end of 5th electric capacity is electrically connected with the second end of second diode and the second end and the Schottky The second end electrical connection of diode, the first end of the 6th electric capacity electrically connects with the second end of the Schottky diode, with And second end ground connection；The first end of 7th electric capacity is electrically connected by the 5th resistance with the second end of second diode, Yi Ji Two ends are grounded, the first end of the 8th electric capacity electrically connected by the 5th resistance with the second end of second diode, And second end electrically connected with the second end of the 7th electric capacity.
- 4. circuit according to claim 2, it is characterised in that the negative charge pump circuit includes：3rd diode, the 4th Diode, the 5th diode, the 6th diode, the 9th electric capacity, the tenth electric capacity, the 11st electric capacity, the 12nd electric capacity, the 13rd electricity Appearance, the 14th electric capacity, the 7th resistance and the 8th resistance；The first end of 3rd diode is electrically connected with the second end of the 4th diode and the second end ground connection, described The first end of 4th diode electrically connects with the second end of the 5th diode, the first end of the 5th diode with it is described The second end electrical connection of 6th diode, the first end of the 6th diode are believed by the 7th resistance and the negative voltage The electrical connection of number output end；The first end of 8th resistance is electrically connected by the 7th resistance with the first end of the 6th diode, Yi Ji Two ends are grounded；The first end of 9th electric capacity is electrically connected with the switch terminals of the boost chip and the second end and the three or two pole The first end electrical connection of pipe, the first end of the tenth electric capacity is electrically connected with the switch terminals of the boost chip and the second end Electrically connected with the second end of the 5th diode；The first end of 11st electric capacity is electrically connected with the first end of the 6th diode and the second end and the described 4th The first end electrical connection of diode, the first end of the 12nd electric capacity electrically connects with the second end of the 11st electric capacity, with And second end ground connection；The first end of 13rd electric capacity electrically connected by the 7th resistance with the first end of the 6th diode and Second end is grounded, and the first end of the 14th electric capacity is electrically connected by the first end of the 7th resistance and the 6th diode Connect and the second end electrically connects with the second end of the 13rd electric capacity.
- A kind of 5. power supply switch circuit, it is characterised in that including：First switch module, second switch module, pulse signal input Voltage conversion circuit described in end, voltage signal output end and any one of Claims 1 to 4；The control terminal of the first switch module electrically connects with the pulse signal input terminal, voltage signal inputs and the electricity The positive voltage signal output end electrical connection of voltage conversion circuit and output end electrically connect with the voltage signal output end；The control terminal of the second switch module electrically connects with the pulse signal input terminal, power supply signal input and direct current Source electrical connection, voltage signal inputs are electrically connected with the negative voltage signal output end of the voltage conversion circuit and output end Electrically connected with the voltage signal output end.
- 6. circuit according to claim 5, it is characterised in that the first switch module includes：First triode, second Triode, the 9th resistance and the tenth resistance；The control terminal of first triode is electrically connected by the 9th resistance with the pulse signal input terminal, first electrode Electrically connected by the tenth resistance with the control terminal of second triode and second electrode is grounded；The first electrode of second triode electrically connects with the positive voltage signal output end of the power-switching circuit, Yi Ji Two electrodes electrically connect with the voltage signal output end.
- 7. circuit according to claim 6, it is characterised in that first triode is NPN type triode, described second Triode is PNP type triode.
- 8. circuit according to claim 5, it is characterised in that the second switch module includes：3rd triode, the 4th Triode, the 11st resistance, the 12nd resistance and the 15th electric capacity；The control terminal of 3rd triode is electrically connected by the 11st resistance with the pulse signal input terminal, the first electricity The control terminal that pole electrically connects with the dc source and second electrode passes through the 12nd resistance and the 4th triode Electrical connection；The first electrode of 4th triode is electrically connected with the voltage signal output end and second electrode and the power supply The negative voltage signal output end electrical connection of change-over circuit；The first end of 15th electric capacity is electrically connected with the dc source and the second end ground connection.
- 9. circuit according to claim 8, it is characterised in that the 3rd triode is PNP type triode, the described 4th Triode is NPN type triode.
- 10. according to the circuit described in any one of claim 5~9, it is characterised in that also include：13rd resistance, first voltage Signal testing end, second voltage signal testing end；The first end of 13rd resistance is electric with the voltage signal output end and the first voltage signal testing end respectively Connection and the second end electrically connect and are grounded with the second voltage signal testing end.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710891556.8A CN107623440A (en) | 2017-09-27 | 2017-09-27 | Voltage conversion circuit and power supply switch circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710891556.8A CN107623440A (en) | 2017-09-27 | 2017-09-27 | Voltage conversion circuit and power supply switch circuit |
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| CN201710891556.8A Pending CN107623440A (en) | 2017-09-27 | 2017-09-27 | Voltage conversion circuit and power supply switch circuit |
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| CN108314146A (en) * | 2018-01-26 | 2018-07-24 | 深圳安吉尔饮水产业集团有限公司 | One kind falling pole control circuit and water purifier |
| CN108880233A (en) * | 2018-08-03 | 2018-11-23 | 上海艾为电子技术股份有限公司 | A kind of charge pump circuit |
| CN109742942A (en) * | 2019-01-28 | 2019-05-10 | 北京汇能精电科技股份有限公司 | A kind of beautifully adorned volt circuit |
| CN109861507A (en) * | 2018-12-21 | 2019-06-07 | 成都信息工程大学 | A dual power conversion method, circuit and power protection method and circuit |
| CN111082638A (en) * | 2019-12-12 | 2020-04-28 | 中国科学院上海微系统与信息技术研究所 | Voltage switcher and control method thereof |
| CN112242704A (en) * | 2019-07-16 | 2021-01-19 | 致茂电子(苏州)有限公司 | Voltage maintaining circuit |
| CN113965074A (en) * | 2021-10-08 | 2022-01-21 | 清华大学 | Voltage Doubler Charge Pump, Implantable Neurostimulator and Implantable Neurostimulation System |
| CN114413939A (en) * | 2022-01-11 | 2022-04-29 | 浙江东胜物联技术有限公司 | Rotation detection system of low-voltage driving anisotropic magnetoresistive sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108314146A (en) * | 2018-01-26 | 2018-07-24 | 深圳安吉尔饮水产业集团有限公司 | One kind falling pole control circuit and water purifier |
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| CN108880233B (en) * | 2018-08-03 | 2023-10-24 | 上海艾为电子技术股份有限公司 | Charge pump circuit |
| CN109861507A (en) * | 2018-12-21 | 2019-06-07 | 成都信息工程大学 | A dual power conversion method, circuit and power protection method and circuit |
| CN109742942A (en) * | 2019-01-28 | 2019-05-10 | 北京汇能精电科技股份有限公司 | A kind of beautifully adorned volt circuit |
| CN112242704A (en) * | 2019-07-16 | 2021-01-19 | 致茂电子(苏州)有限公司 | Voltage maintaining circuit |
| CN112242704B (en) * | 2019-07-16 | 2023-09-29 | 致茂电子(苏州)有限公司 | Voltage maintaining circuit |
| CN111082638A (en) * | 2019-12-12 | 2020-04-28 | 中国科学院上海微系统与信息技术研究所 | Voltage switcher and control method thereof |
| CN111082638B (en) * | 2019-12-12 | 2021-08-27 | 中国科学院上海微系统与信息技术研究所 | Voltage switcher and control method thereof |
| CN113965074A (en) * | 2021-10-08 | 2022-01-21 | 清华大学 | Voltage Doubler Charge Pump, Implantable Neurostimulator and Implantable Neurostimulation System |
| CN114413939A (en) * | 2022-01-11 | 2022-04-29 | 浙江东胜物联技术有限公司 | Rotation detection system of low-voltage driving anisotropic magnetoresistive sensor |
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