CN110417259A - A kind of self-switching type voltage regulator - Google Patents
A kind of self-switching type voltage regulator Download PDFInfo
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- CN110417259A CN110417259A CN201910655135.4A CN201910655135A CN110417259A CN 110417259 A CN110417259 A CN 110417259A CN 201910655135 A CN201910655135 A CN 201910655135A CN 110417259 A CN110417259 A CN 110417259A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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Abstract
The invention discloses a kind of self-switching type voltage regulators, the DC voltage size after capable of monitoring AC-input voltage rectification in real time, and pass through sample circuit control switch circuit on or off；When AC-input voltage is lower, sample circuit can detect rapidly and control switch circuit is in the conductive state, and it can freely set switching threshold values, promote the peak value of minimum input voltage, reduce input voltage range, to providing reliable and stable voltage range to late-class circuit, prevent late-class circuit can not work normally because input voltage is too low or input voltage range is too wide can not reliably working.The present invention is suitable for being likely to occur the Switching Power Supply occasion of ultralow input voltage, ultra-wide input voltage range, and reaction speed is fast, and circuit is simple and reliable, flexible design, and switching threshold values is adjusted.
Description
Technical field
The present invention relates to circuit field, it is specifically related to a kind of for ultra-wide input voltage range, ultralow input voltage
Input voltage regulation device.
Background technique
In the indicating fault lamp switch power of high-tension overhead line industry, it is too low usually to encounter input voltage, causes
Switching Power Supply can not work normally；Or ultra-wide input voltage range is encountered, leading to product section performance, there are security risks.
Existing Switching Power Supply, which solves ultralow input voltage, the method for ultra-wide input voltage range is summed up mainly two
Kind, the first is first boosted and is depressured again using 2 grades of topological projects.Second is to be depressured using non-isolated scheme using BUCK etc.
Circuit.Wherein the first scheme uses 2 grades of topologys, mainly first input voltage boosts, then export lower electricity by reduction voltage circuit
Pressure, advantage is to be able to achieve ultralow input voltage to work normally, including the input voltage operating condition lower than output voltage；The disadvantage is that circuit
Complexity, cost and volume increase；Second scheme uses non-isolated scheme, the use of reduction voltage circuits, the advantages such as BUCK is generally energy
Realize decompression, circuit is simple；It is worked normally the disadvantage is that cannot achieve ultralow input voltage, i.e., input voltage is lower than output voltage
Operating condition.
In high-tension overhead line industry, nowadays seldom Switching Power Supply is able to satisfy this special operation condition and remains to normal work on the market
Make.Therefore, it is necessary to improve to the prior art, one kind is designed in ultra-wide input voltage range, ultralow input voltage work
It remains to provide the circuit of burning voltage to late-class circuit under condition (minimum input voltage is up to 10Vac).
Summary of the invention
In view of this, in order to solve the above technical problem, the present invention provides a kind of adjustings of input power self-switching type voltage
Device may be implemented to remain to provide higher input to late-class circuit under the operating conditions such as ultralow input voltage, ultra-wide input voltage range
Voltage.
The purpose of the present invention is what is be achieved through the following technical solutions, a kind of self-switching type voltage regulator, including multiplication of voltage
Rectification circuit, rectification circuit, switching circuit, sample circuit and accumulator；
The input terminal of the voltage doubling rectifing circuit connects input voltage, the output end connection switch circuit of voltage doubling rectifing circuit
Input terminal；The input terminal of the output end connection accumulator of the switching circuit；
The input terminal of the rectification circuit also connects the input voltage, the output end connection energy storage electricity of rectification circuit simultaneously
The input terminal on road；
The output end output services voltage of the accumulator is late-class circuit power supply；
The sampled output of the output end sample circuit of the sampling input terminal connection voltage doubling rectifing circuit of the sample circuit
Connect the control signal input of the switching circuit；
The sample circuit acquires the DC voltage after voltage doubling rectifing circuit and the guarantor with sample circuit inner setting in real time
Shield threshold values is compared, and when DC voltage is less than the protection threshold values of setting, sample circuit exports sampled signal control switch electricity
Road conducting, the operating voltage of late-class circuit is the output voltage of the voltage doubling rectifing circuit at this time；When DC voltage is greater than setting
Protection threshold values when, sample circuit export sampled signal control switch circuit disconnect, the operating voltage of late-class circuit is institute at this time
State the output voltage of rectification circuit.
Preferably, the voltage doubling rectifing circuit, including capacitor C1, C3, diode D1, D3；The capacitor C1 cathode
Connect the first input end of input voltage, capacitor C1 anode, diode D3 cathode connected with the anode of diode D1, diode
The anode of D3 connects the second input terminal of input voltage with the cathode of capacitor C3, and the cathode of diode D1 and the anode of capacitor C3 connect
It connects.
Preferably, the rectification circuit, including diode D4；The cathode connection accumulator of the diode D4
Input terminal, the first input end of the anode connection input voltage of diode D4.
Preferably, the switching circuit is P-type channel metal-oxide-semiconductor TR1, and the source electrode of the P-type channel metal-oxide-semiconductor TR1 connects
Connect the output cathode end B of voltage doubling rectifing circuit, the input terminal of the drain electrode connection accumulator of P-type channel metal-oxide-semiconductor TR1, P-type channel
The sampled output A of the grid connection sample circuit of metal-oxide-semiconductor TR1.
Preferably, the switching circuit is relay K1, and the first switch end of the relay K1 connects times repoussage
The input terminal of the second switch end connection accumulator of the output cathode end B of current circuit, relay K1, the first of relay K1 are adopted
Sample end connects the sampled output A of sample circuit, the reference ground of the second sampling end connection accumulator of relay K1.
Preferably, the sample circuit includes detection circuit and stable power-supplying circuit；The detection circuit is by resistance
R1, R4 and acquisition chip U1 composition, the stable power-supplying electricity routing zener D5, zener diode D6, resistance R3, electricity
Hinder R2 and N-type channel metal-oxide-semiconductor TR2 composition；The output cathode end B of one end connection voltage doubling rectifing circuit of resistance R1, resistance R1's
The other end, acquisition chip U1 sampling foot connected with one end of resistance R4, the signal ground of the other end of resistance R4, acquisition chip U1
It is connect with the reference of accumulator, the grid of the N-type channel metal-oxide-semiconductor TR2 of the feeder ear and stable power-supplying circuit of acquisition chip U1
Pole connection；The cathode of zener diode D5, one end of resistance R2 are connected with the output cathode end B of voltage doubling rectifing circuit, pressure stabilizing two
The anode of pole pipe D5, one end of resistance R3 are connected with the sampling end A of sample circuit, the other end and N-type channel metal-oxide-semiconductor of resistance R3
The drain electrode of TR2 connects, the reference ground connection of the source electrode of N-type channel metal-oxide-semiconductor TR2, the anode of zener diode D6 and accumulator,
The cathode of zener diode D6, the other end of resistance R2 are connected with the grid of N-type channel metal-oxide-semiconductor TR2.
Preferably, there are 2 kinds of modes by the acquisition chip U1:
Mode one: acquisition chip U1 selects TL431 cake core, the sampling foot connection resistance R1 and resistance of TL431 cake core
The phase contact of R4；The reference ground for being signally connected accumulator of TL431 cake core；The feeder ear connection of TL431 cake core is steady
Determine the grid of the N-type channel metal-oxide-semiconductor TR2 of power supply circuit；
Mode two: the acquisition chip U1 includes operational amplifier U2, triode Q2, diode D8 and constant pressure source VREF；
Sampling foot of the non-inverting input terminal of the operational amplifier U2 as acquisition chip U1, the inverting input terminal of operational amplifier U2
Connect constant pressure source VREFAnode, the negative power end and constant pressure source V of operational amplifier U2REFNegative terminal connection and as acquisition chip
The signal ground of U1, feeder ear of the positive power source terminal of operational amplifier U2 as acquisition chip U1, the output end of operational amplifier U2
The base stage of connecting triode Q2, the negative power end of the emitter connection operational amplifier U2 of triode Q2 and the sun of diode D8
Pole, the cathode of the collector connection diode D8 of triode Q2 and the positive power source terminal of operational amplifier U2.
It further, further include leadage circuit, the leadage circuit includes resistance R5 and diode D7, and the one of resistance R5
End connect with the sampling end A of sample circuit, the other end of resistance R5 is connect with the cathode of diode D7, the anode of diode D7 and
The output cathode end B connection of voltage doubling rectifing circuit；
Compared with prior art, the invention has the following beneficial effects:
1) present invention solves the problems, such as that ultralow input voltage, ultra-wide input voltage range late-class circuit can not work normally；
Input terminal voltage is typically all AC sine signal, is changed into steady dc voltage, Voltage Peak by voltage doubling rectifing circuit
Value is twice of input voltage peak value；It is changed into steady dc voltage by rectification circuit simultaneously, voltage peak is input electricity
Voltage crest value；Sample circuit is capable of real-time acquisition voltage doubling rectifing circuit output both end voltage, will when detection output both end voltage is higher
Voltage doubling rectifing circuit and accumulator disconnect；When detection output both end voltage is lower, by voltage doubling rectifing circuit and accumulator
Connection；This circuit may be implemented to remain to provide to late-class circuit under the operating conditions such as ultralow input voltage, ultra-wide input voltage range
High-line input voltage works normally following stage circuit, and cost is relatively low.
2) present invention can reduce input voltage range；--- when detection voltage doubling rectifing circuit output both end voltage is lower, open
Closing of circuit is closed, voltage doubling rectifing circuit is connected with accumulator, late-class circuit both end voltage is twice of input voltage peak at this time
Value；When detection voltage doubling rectifing circuit output both end voltage is higher, switching circuit is disconnected, by voltage doubling rectifing circuit and accumulator
It disconnects, late-class circuit both end voltage is input voltage peak value at this time.In the case where this control, late-class circuit both end voltage by
It is defeated to highest that the minimum input voltage peak value of script to maximum input voltage peak ranges narrows down to 2 times of minimum input voltage peak values
Enter voltage peak range.
3) present invention is powered using stable power-supplying circuit is carried in circuit without additional power supply；
4) switching valve value of the present invention is adjustable；The reference voltage that switching valve value can sample foot according to U1 adjusts resistance
The ratio of R1 and resistance R4 is adjusted.
Detailed description of the invention
Fig. 1 is the application block diagram of self-switching type voltage regulator of the present invention；
Fig. 2 is the schematic diagram of switching circuit one in first embodiment of the invention self-switching type voltage regulator；
Fig. 3 is sample circuit schematic diagram in first embodiment of the invention self-switching type voltage regulator；
Fig. 4 is the schematic diagram of leadage circuit in first embodiment of the invention self-switching type voltage regulator.
Fig. 5 is the schematic diagram of switching circuit two in second embodiment of the invention self-switching type voltage regulator；
Fig. 6 is the principle that sampling A/D chip U1 uses comparison circuit in third embodiment of the invention self-switching type voltage regulator
Figure.
Specific embodiment
First embodiment
Fig. 2 is the schematic diagram of switching circuit one in first embodiment of the invention self-switching type voltage regulator, comprising: capacitor
C1, C2, C3, diode D1, D2, D3, D4, in the present embodiment, switching circuit uses P-type channel metal-oxide-semiconductor TR1.
Capacitor C1, C2, C3 selection electrolytic capacitor, P-type channel metal-oxide-semiconductor TR1 the optimal performance of Vds under can choose it is big
In input terminal voltage peak value.
The capacitor C1 cathode connects input voltage first input end, capacitor C1 anode, two with the anode of diode D4
The cathode of pole pipe D3 is connected with the anode of diode D1, capacitor C3 anode, the cathode of diode D1 and P-type channel metal-oxide-semiconductor TR1
Source electrode be connected, the output cathode end B as voltage doubling rectifing circuit；The drain electrode of P-type channel metal-oxide-semiconductor TR1, diode D2 anode
It is connected with diode D4 cathode；The sampling end A of the grid connection sample circuit of P-type channel metal-oxide-semiconductor TR1；Diode D2 cathode
It is connect with the anode of capacitor C2；The cathode of capacitor C2, the cathode of capacitor C3, the anode of diode D3 and input voltage second input
End connection；The both ends capacitor C2 are late-class circuit power supply.
Capacitor C1, C3 and diode D1, D3 form twice of voltage doubling rectifing circuit, when input 10Vac, capacitor C3 both end voltage
For 28Vdc；Diode D2 mainly prevents capacitor C2 electric current from flowing backward, and can also cancel.
Fig. 3 is sample circuit schematic diagram in first embodiment of the invention self-switching type voltage regulator, and wherein dotted line frame is 1.
It is stable power-supplying circuit, 2. dotted line frame is detection circuit, sample circuit includes stable power-supplying circuit and detection circuit.
Wherein: detection circuit includes resistance R1, R4, sampling A/D chip U1；
Stable power-supplying circuit includes resistance R2, R3, zener diode D5, D6, N-type channel metal-oxide-semiconductor TR2；
Switching circuit, which shares, to be connected at 3 with sample circuit, and as shown in Figures 2 and 3, wherein B signal is voltage doubling rectifing circuit
The anode of capacitor C3 is powered and is detected for sample circuit；A-signal is the anode of the zener diode D5 in sample circuit, output
To the grid of P-type channel metal-oxide-semiconductor TR1, turning on and off for P-type channel metal-oxide-semiconductor TR1 is controlled.The signal ground and electricity of sample circuit
The cathode for holding C2 is connected, and is connected to late-class circuit.
The detection circuit is made of resistance R1, R4 and acquisition chip U1；One end connection voltage multiplying rectifier electricity of resistance R1
The other end of the output cathode end B on road, resistance R1, the sampling foot of acquisition chip U1 are connected with one end of resistance R4, resistance R4's
The reference ground connection of the other end, the signal ground of acquisition chip U1 and accumulator, the feeder ear and stable power-supplying of acquisition chip U1
The grid of the N-type channel metal-oxide-semiconductor TR2 of circuit connects；The stable power-supplying electricity routing zener D5, zener diode
D6, resistance R3, resistance R2 and N-type channel metal-oxide-semiconductor TR2 composition, the cathode of zener diode D5, one end of resistance R2 and repoussage again
The sampling end A of the output cathode end B connection of current circuit, the anode of zener diode D5, one end of resistance R3 and sample circuit connects
It connects, the other end of resistance R3 is connected with the drain electrode of N-type channel metal-oxide-semiconductor TR2, source electrode, the zener diode of N-type channel metal-oxide-semiconductor TR2
The reference ground connection of the anode and accumulator of D6, the cathode of zener diode D6, the other end of resistance R2 and N-type channel MOS
The grid of pipe TR2 connects.
Sample circuit working principle: detection circuit is given to the sampling foot of acquisition chip U1, acquisition chip after being depressured B signal
U1 is the TL431 of 2.5V, when voltage doubling rectifing circuit output cathode end B voltage is greater than the threshold voltage of setting, i.e. acquisition chip
The sampling foot voltage of U1 is higher than 2.5V, and the grid voltage of N-type channel metal-oxide-semiconductor TR2 reduces, and TR2 is caused to become ending from conducting, into
One step promotes the both ends zener diode D5 without pressure drop, and a-signal is made, without pressure drop, P-type channel metal-oxide-semiconductor TR1 to be caused to close with respect to B signal
It is disconnected；When voltage doubling rectifing circuit output cathode end B voltage is less than the threshold voltage of setting, U1 sampling end voltage is lower than 2.5V, B letter
By the clamped pressure stabilizing value to zener diode D6 number after resistance R2 decompression, N-type channel metal-oxide-semiconductor TR2 is connected, and further promotes
Zener diode D5 work, makes its a-signal with respect to the negative of the voltage zener diode D5 pressure stabilizing value of B signal, leads to p-type ditch
Road metal-oxide-semiconductor TR1 conducting；Wherein zener diode D5, D6 takes 15V or so；The minimum Vds of N-type channel metal-oxide-semiconductor TR2 suggests being greater than 2
Times input terminal voltage peak value；The value of resistance R1, R2, R4 will affect the continuous switching on and shutting down time, specific in combination with actual conditions tune
The value of economize on electricity resistance R1, R2, R4.Threshold voltage can be set according to the maximum input voltage that late-class circuit can be born.It can also press
According to demand sets itself, the ratio of resistance R1 and resistance R4 is adjusted according to the reference voltage that U1 samples foot to adjust.
Fig. 4 is the schematic diagram of leadage circuit in first embodiment of the invention self-switching type voltage regulator, including diode
D7, resistance R5；One end of the resistance R5 and the sampling end A connection of sample circuit, the other end of resistance R5 is with diode D7's
Cathode connection, the anode of diode D7 and the output cathode end B connection of voltage doubling rectifing circuit.Working principle: as P-type channel MOS
When the both ends the GS parasitic capacitance of pipe TR1 is larger, GS both end voltage not easy consumption causes P-type channel metal-oxide-semiconductor TR1 not close in time
It is disconnected, therefore increase leadage circuit, bleed-off circuit is formed it into, in time turns off P-type channel metal-oxide-semiconductor TR1；
When threshold voltage of the input terminal voltage lower than setting, P-type channel metal-oxide-semiconductor TR1 is constantly on state, conducting
Impedance very little, calorific value is small, and also small (can accomplish within 0.1W) is lost in sample circuit, has little influence on Switching Power Supply complete machine effect
Rate.When input terminal voltage is higher than the threshold voltage of setting, P-type channel metal-oxide-semiconductor TR1 is in an off state, in calorific value
It rises, suitable metal-oxide-semiconductor need to be chosen according to power consumption.
Second embodiment
Fig. 5 is the schematic diagram of switching circuit two in second embodiment of the invention self-switching type voltage regulator, real with first
It applies unlike example diagram 2, switching device is changed to relay K1 from P-type channel metal-oxide-semiconductor TR1, and adjust connection relationship are as follows: described
Capacitor C1 cathode connect first input end with the anode of diode D4, the cathode and diode of capacitor C1 anode, diode D3
The anode of D1 is connected, and capacitor C3 anode, the cathode of diode D1 are connected with the first switch end of relay K1, as multiplication of voltage
The output cathode end B of rectification circuit；The second switch end of relay K1, diode D2 anode are connected with diode D4 cathode；
The sampling end A of the first sampling end connection sample circuit of relay K1；Diode D2 cathode is connect with the anode of capacitor C2；Second
Input terminal, the cathode of capacitor C2, the cathode of capacitor C3, the anode of diode D3 are connected with the second sampling end of relay K1；Electricity
Hold the both ends C2 for late-class circuit power supply.
The working principle of circuit is as first embodiment, it can be achieved that equivalent efficacy after adjustment.
3rd embodiment
Fig. 6 is the principle that sampling A/D chip U1 uses comparison circuit in third embodiment of the invention self-switching type voltage regulator
Figure, unlike first embodiment Fig. 3, by the acquisition chip U1 (TL431) of sample circuit replace with by operational amplifier U2,
Triode Q2, diode D7 and constant pressure source VREFThe sampling comparison circuit of composition.
Sampling foot of the non-inverting input terminal of operational amplifier U2 as acquisition chip U1, the anti-phase input of operational amplifier U2
End connection constant pressure source VREFAnode, the negative power end and constant pressure source V of operational amplifier U2REFNegative terminal connection and as acquisition core
The signal ground of piece U1, feeder ear of the positive power source terminal of operational amplifier U2 as acquisition chip U1, the output of operational amplifier U2
Hold the base stage of connecting triode Q2, the negative power end of the emitter connection operational amplifier U2 of triode Q2 and the sun of diode D8
Pole, the cathode of the collector connection diode D8 of triode Q2 and the positive power source terminal of operational amplifier U2.
The working principle of circuit is as above embodiments, it can be achieved that equivalent efficacy after adjustment.
It is disclosed above to be merely a preferred embodiment of the present invention, but the present invention is not limited to this, any this field
Several modifications that technical staff carries out the present invention under the premise of without departing from core of the invention thought should fall in this hair
Bright scope of protection of the claims etc.Protection scope of the present invention is subjected to the contents of the claims.
Claims (8)
1. a kind of self-switching type voltage regulator, it is characterised in that: including voltage doubling rectifing circuit, rectification circuit, switching circuit, adopt
Sample circuit and accumulator；
The input terminal of the voltage doubling rectifing circuit connects input voltage, the output end connection switch circuit of voltage doubling rectifing circuit it is defeated
Enter end；The input terminal of the output end connection accumulator of the switching circuit；
The input terminal of the rectification circuit also connects the input voltage simultaneously, the output end connection accumulator of rectification circuit
Input terminal；
The output end output services voltage of the accumulator is late-class circuit power supply；
The sampled output connection of the output end sample circuit of the sampling input terminal connection voltage doubling rectifing circuit of the sample circuit
The control signal input of the switching circuit；
The sample circuit acquires the DC voltage after voltage doubling rectifing circuit and the protection valve with sample circuit inner setting in real time
Value is compared, and when DC voltage is less than the protection threshold values of setting, sample circuit output sampled signal control switch circuit is led
Logical, the operating voltage of late-class circuit is the output voltage of the voltage doubling rectifing circuit at this time；When DC voltage is greater than the guarantor of setting
When protecting threshold values, sample circuit exports sampled signal control switch circuit and disconnects, and the operating voltage of late-class circuit is described whole at this time
The output voltage of current circuit.
2. a kind of self-switching type voltage regulator according to claim 1, it is characterised in that: the voltage doubling rectifing circuit
Including capacitor C1, C3, diode D1, D3；The first input end of the capacitor C1 cathode connection input voltage, capacitor C1 is just
Pole, diode D3 cathode connected with the anode of diode D1, the anode of diode D3 connected with the cathode of capacitor C3 input electricity
Second input terminal of pressure, the anode connection of the cathode and capacitor C3 of diode D1.
3. a kind of self-switching type voltage regulator according to claim 1, it is characterised in that: the rectification circuit, packet
Include diode D4；The input terminal of the cathode connection accumulator of the diode D4, the anode connection input electricity of diode D4
The first input end of pressure.
4. a kind of self-switching type voltage regulator according to claim 1, it is characterised in that: the switching circuit is P
The output cathode end of the source electrode connection voltage doubling rectifing circuit of type channel MOS tube TR1, the P-type channel metal-oxide-semiconductor TR1, p-type ditch
The input terminal of the drain electrode connection accumulator of road metal-oxide-semiconductor TR1, the sampling of the grid connection sample circuit of P-type channel metal-oxide-semiconductor TR1
Output end.
5. a kind of self-switching type voltage regulator according to claim 1, it is characterised in that: the switching circuit be after
The output cathode end of the first switch end connection voltage doubling rectifing circuit of electric appliance K1, the relay K1, the second of relay K1
Switch terminals connect the input terminal of accumulator, the sampled output of the first sampling end connection sample circuit of relay K1, relay
The reference ground of the second sampling end connection accumulator of device K1.
6. a kind of self-switching type voltage regulator according to claim 1, it is characterised in that: the sample circuit includes
Detection circuit and stable power-supplying circuit；The detection circuit is made of resistance R1, R4 and acquisition chip U1；Described stablizing supplies
Electric routing zener D5, zener diode D6, resistance R3, resistance R2 and N-type channel metal-oxide-semiconductor TR2 composition；Resistance R1's
One end connects the output cathode end of voltage doubling rectifing circuit, the other end of resistance R1, the sampling foot of acquisition chip U1 and resistance R4
One end connection, the reference ground connection of the other end of resistance R4, the signal ground of acquisition chip U1 and accumulator, acquisition chip U1's
Feeder ear is connect with the grid of the N-type channel metal-oxide-semiconductor TR2 of stable power-supplying circuit；The one of the cathode of zener diode D5, resistance R2
End connects with the output cathode end of voltage doubling rectifing circuit, the anode of zener diode D5, one end of resistance R3 and sample circuit
Sampled output connection, the other end of resistance R3 are connected with the drain electrode of N-type channel metal-oxide-semiconductor TR2, the source of N-type channel metal-oxide-semiconductor TR2
The reference ground connection of pole, the anode of zener diode D6 and accumulator, the other end of the cathode of zener diode D6, resistance R2
It is connected with the grid of N-type channel metal-oxide-semiconductor TR2.
7. a kind of self-switching type voltage regulator according to claim 6, it is characterised in that: the acquisition chip U1 choosing
With TL431 cake core,
The phase contact of the sampling foot connection resistance R1 and resistance R4 of TL431 cake core；TL431 cake core is signally connected energy storage
The reference ground of circuit；The grid of the N-type channel metal-oxide-semiconductor TR2 of the feeder ear stable connection power supply circuit of TL431 cake core；
Or the acquisition chip U1 includes operational amplifier U2, triode Q2, diode D7 and constant pressure source VREF；Described
Sampling foot of the non-inverting input terminal of operational amplifier U2 as acquisition chip U1, the inverting input terminal of operational amplifier U2 connect permanent
Potential source VREFAnode, the negative power end and constant pressure source V of operational amplifier U2REFNegative terminal connection and the letter as acquisition chip U1
Number ground, feeder ear of the positive power source terminal of operational amplifier U2 as acquisition chip U1, the output end connection three of operational amplifier U2
The base stage of pole pipe Q2, the negative power end of the emitter connection operational amplifier U2 of triode Q2 and the anode of diode D8, three poles
The cathode of the collector connection diode D8 of pipe Q2 and the positive power source terminal of operational amplifier U2.
8. a kind of self-switching type voltage regulator according to claim 4, it is characterised in that: it further include leadage circuit, institute
The leadage circuit stated includes resistance R5 and diode D7, and one end of resistance R5 and the sampled output of sample circuit connect, resistance
The other end of R5 is connect with the cathode of diode D7, and the anode of diode D7 and the output cathode end of voltage doubling rectifing circuit connect.
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| CN201910655135.4A CN110417259A (en) | 2019-07-19 | 2019-07-19 | A kind of self-switching type voltage regulator |
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| CN201910655135.4A CN110417259A (en) | 2019-07-19 | 2019-07-19 | A kind of self-switching type voltage regulator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111026224A (en) * | 2019-12-19 | 2020-04-17 | 广州金升阳科技有限公司 | Auxiliary circuit |
| CN111697816A (en) * | 2020-05-29 | 2020-09-22 | 广东浪潮大数据研究有限公司 | Power factor correction circuit, device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111026224A (en) * | 2019-12-19 | 2020-04-17 | 广州金升阳科技有限公司 | Auxiliary circuit |
| CN111697816A (en) * | 2020-05-29 | 2020-09-22 | 广东浪潮大数据研究有限公司 | Power factor correction circuit, device and method |
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