CN106160531A - A kind of switching regulator filtering type voltage-stabilized power supply circuit based on overvoltage crowbar - Google Patents
A kind of switching regulator filtering type voltage-stabilized power supply circuit based on overvoltage crowbar Download PDFInfo
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- CN106160531A CN106160531A CN201610620677.4A CN201610620677A CN106160531A CN 106160531 A CN106160531 A CN 106160531A CN 201610620677 A CN201610620677 A CN 201610620677A CN 106160531 A CN106160531 A CN 106160531A
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal 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
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of switching regulator filtering type voltage-stabilized power supply circuit based on overvoltage crowbar, it is characterised in that: it mainly is made up of transformer T, diode rectifier U1, triode VT3, resistance R8, electric capacity C1, electric capacity C4, diode D3, diode D4, power supply processing circuit, overvoltage crowbar, second-order filter circuit and three-terminal voltage-stabilizing circuit.The present invention can power electrical network or mains-supplied is processed, it is thus possible to provide more galvanic current source for electrical equipment such as television set, electronic computer and numerical control devices, in order to improves the serviceability of electrical equipment, is suitable for promoting the use.
Description
Technical field
The present invention relates to a kind of power circuit, particularly relate to a kind of switching regulator filtering type voltage stabilizing based on overvoltage crowbar
Power circuit.
Background technology
Switch-type stabilized power circuit, because its efficiency is high, lightweight and caloric value is few, is usually used in television set, electronic computer
With on the electrical equipment such as numerical control device, during use, electrical network alternating current can be converted to direct current by switch mode power.With scientific and technical
Progressive, the electrical equipment such as television set, electronic computer and numerical control device all is ceaselessly being updated regenerating, and these electrical equipment are to power supply
Stability requirement is also more and more higher, and traditional switch mode power can not meet the use needs of electrical equipment.
Content of the invention
It is an object of the invention to provide a kind of switching regulator filtering type voltage-stabilized power supply circuit based on overvoltage crowbar, with
Expectation can provide more galvanic current for electrical equipment such as television set, electronic computer and numerical control devices.
The present invention is achieved through the following technical solutions:
A kind of switching regulator filtering type voltage-stabilized power supply circuit based on overvoltage crowbar, mainly by transformer T, diode is whole
Stream device U1, triode VT3, positive pole is connected with the positive output end of diode rectifier U1, negative pole and diode rectifier U1
The electric capacity C1 that negative output terminal is connected, the power supply processing circuit being connected with positive pole and the negative pole of electric capacity C1 respectively, P pole and power supply
Processing the diode D4 that circuit is connected, N pole is connected with the emitter stage of triode VT3, P pole is connected with power supply processing circuit
Connect, diode D3 that N pole is connected with the colelctor electrode of triode VT3 after resistance R8, the colelctor electrode phase of positive pole and triode VT3
The electric capacity C4 that connection, negative pole are connected with the negative pole of electric capacity C1 after overvoltage crowbar, is connected with the negative pole of electric capacity C4
Second-order filter circuit, and the three-terminal voltage-stabilizing being connected with the base stage of triode VT3, emitter stage and second-order filter circuit respectively is electric
Road forms；The emitter stage of described triode VT3 is also connected with the N pole of diode D3, the former limit inductance coil of described transformer T
Two ends composition power input, an input of described diode rectifier U1 and the secondary inductance coil of transformer T
Non-same polarity is connected, its another input is connected with the Same Name of Ends of the secondary inductance coil of transformer T.
Further, described overvoltage crowbar is by FET Q, triode VT5, triode VT6, one end and electric capacity C1
The resistance R13 that negative pole is connected, the other end is connected with the grid of FET Q, positive pole is connected with the grid of FET Q
Connect, electric capacity C7 that negative pole is connected with the base stage of triode VT5, one end is connected with the drain electrode of FET Q, the other end and three
The resistance R14 that the base stage of pole pipe VT5 is connected, P pole is connected with the negative pole of electric capacity C1, N pole is connected with the source electrode of FET Q
The diode D7 connecing, positive pole is connected with the colelctor electrode of triode VT5, negative pole source electrode phase with FET Q after resistance R15
The electric capacity C8 connecting, the resistance that one end is connected with the negative pole of electric capacity C8, the other end is connected with the emitter stage of triode VT6
R16, the resistance R17 being serially connected between the base stage of triode VT5 and emitter stage, be serially connected in colelctor electrode and the base stage of triode VT6
Between resistance R18, and the diode that P pole is connected with the base stage of triode VT6, N pole is connected with the negative pole of electric capacity C4
D8 forms；The emitter stage of described triode VT5 is connected with the colelctor electrode of triode VT6.
Further, described second-order filter circuit is by operational amplifier P1, operational amplifier P2, triode VT7, positive pole
Be connected with the negative pole of electric capacity C4, electric capacity C9 that negative pole is connected with the positive input terminal of operational amplifier P1, positive pole is through resistance R19
Be connected with the positive input terminal of operational amplifier P1 afterwards, electric capacity C12, P that negative pole is connected with the output of operational amplifier P1
The diode D10 that pole is connected with the positive pole of electric capacity C12 after resistance R20, N pole is connected with the emitter stage of triode VT7, just
Pole is connected with the negative input end of operational amplifier P1 after resistance R21, the electric capacity C10 of minus earth, and positive pole is after resistance R22
Be connected with the negative input end of operational amplifier P2, the electric capacity C11 of minus earth, P pole is connected with the positive pole of electric capacity C10, N pole
The diode D9 being connected with the positive pole of electric capacity C11, and one end is connected with the P pole of diode D9, the other end and triode
The resistance R23 composition that the base stage of VT7 is connected；The positive input terminal of described operational amplifier P2 and the output of operational amplifier P1
Being connected, the base stage of described triode VT7 is connected with three-terminal voltage-stabilizing circuit.
Further, described power supply processing circuit is by triode VT1, triode VT2, is serially connected in the base of triode VT1
Resistance R1 between the positive pole of pole and electric capacity C1, the resistance R2 being serially connected between the base stage of triode VT1 and the negative pole of electric capacity C1,
The diode D1 that P pole is connected with the positive pole of electric capacity C1, N pole is connected with the colelctor electrode of triode VT2 after resistance R3, concatenation
Resistance R4 between the N pole and the base stage of triode VT2 of diode D1, is serially connected in the N pole of diode D1 with triode VT1's
Resistance R5 between colelctor electrode, positive pole is connected with the base stage of triode VT2, negative pole after resistance R6 with triode VT1 send out
The electric capacity C2 that emitter-base bandgap grading is connected, positive pole is connected with the negative pole of electric capacity C2 after resistance R7, negative pole is connected with the negative pole of electric capacity C1
The electric capacity C3 connecing, and the diode D2 that P pole is connected with the negative pole of electric capacity C3, N pole is connected with the emitter stage of triode VT1
Composition；The negative pole of described electric capacity C2 is connected with the P pole of diode D3, and the negative pole of described electric capacity C3 is connected with the negative pole of electric capacity C4
Connecing, the emitter stage of described triode VT2 is connected with the P pole of diode D4.
In order to ensure effect, described three-terminal voltage-stabilizing circuit is by three terminal regulator U2, triode VT4, one end and triode VT3
The inductance L that emitter stage is connected, the other end is connected with the VOUT pin of three terminal regulator U2, positive pole after resistance R9 with three
The electric capacity C5 that the emitter stage of pole pipe VT3 is connected, negative pole is connected with the VOUT pin of three terminal regulator U2, positive pole and three ends are steady
The electric capacity C6 that the VOUT pin of depressor U2 is connected, negative pole is connected with the base stage of triode VT7, one end and three terminal regulator U2
The resistance R10 that VIN pin is connected, the other end is connected with the negative pole of electric capacity C6, the VOUT pipe of P pole and three terminal regulator U2
The Zener diode D5 that pin is connected, N pole is connected with the colelctor electrode of triode VT4, one end is connected with the base stage of triode VT4
Connect, resistance R11 that the other end is connected with the negative pole of electric capacity C6, and P pole emitter stage with triode VT4 after resistance R12
Be connected, diode D6 that N pole is connected with the VOUT pin of three terminal regulator U2 composition；The VIN of described three terminal regulator U2
Pin is connected with the base stage of triode VT3, and its GND pin is grounded；The N pole of described diode D6 is common with the negative pole of electric capacity C6
The output of composition three-terminal voltage-stabilizing circuit.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) electrical network can be powered by the present invention or mains-supplied is processed, it is thus possible to be television set, electronic computer sum
The electrical equipment such as control device provide more galvanic current source, in order to improve the serviceability of electrical equipment.
(2) instant high-voltage of input voltage can also be eliminated or suppress by the present invention, and the present invention can be protected to connect
Electric appliance load is not damaged by high voltage, ensures that stability and the reliability of the present invention.
(3) interference signal in signal can be eliminated by the present invention, makes the signal of telecommunication more steady, it is thus possible to be further ensured that
There is provided more galvanic current source for electrical equipment.
Brief description
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the circuit diagram of the overvoltage crowbar of the present invention.
Fig. 3 is the circuit diagram of the second-order filter circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figures 1 to 3, the switching regulator filtering type voltage-stabilized power supply circuit based on overvoltage crowbar of the present invention, mainly
By transformer T, diode rectifier U1, triode VT3, resistance R8, electric capacity C1, electric capacity C4, diode D3, diode D4, electricity
Source processes circuit, overvoltage crowbar, second-order filter circuit and three-terminal voltage-stabilizing circuit composition.
During connection, the positive pole of described electric capacity C1 is connected with the positive output end of diode rectifier U1, its negative pole and two poles
The negative output terminal of pipe rectifier U1 is connected.Described power supply processing circuit is connected with positive pole and the negative pole of electric capacity C1 respectively, institute
The P pole stating diode D4 is connected with power supply processing circuit, and its N pole is connected with the emitter stage of triode VT3.Described diode
The P pole of D3 is connected with power supply processing circuit, and its N pole is connected with the colelctor electrode of triode VT3 after resistance R8.Described electric capacity
The positive pole of C4 is connected with the colelctor electrode of triode VT3, and its negative pole is connected with the negative pole of electric capacity C1 after overvoltage crowbar.
Described second-order filter circuit is connected with the negative pole of electric capacity C4, described three-terminal voltage-stabilizing circuit respectively with the base stage of triode VT3, send out
Emitter-base bandgap grading is connected with second-order filter circuit.
Meanwhile, the emitter stage of described triode VT3 is also connected with the N pole of diode D3, the former limit electricity of described transformer T
The two ends composition power input of sense coil, this input can direct external civil power.One of described diode rectifier U1 defeated
Enter end to be connected with the non-same polarity of the secondary inductance coil of transformer T, the secondary inductance of its another input and transformer T
The Same Name of Ends of coil is connected.
Described power supply processing circuit is by triode VT1, triode VT2, resistance R1, resistance R2, resistance R3, resistance R4, electricity
Resistance R5, resistance R6, resistance R7, electric capacity C2, electric capacity C3, diode D1 and diode D2 composition.
During connection, described resistance R1 is serially connected between the base stage of triode VT1 and the positive pole of electric capacity C1, and described resistance R2 goes here and there
It is connected between the base stage of triode VT1 and the negative pole of electric capacity C1.The P pole of described diode D1 is connected with the positive pole of electric capacity C1,
Its N pole is connected with the colelctor electrode of triode VT2 after resistance R3.Described resistance R4 is serially connected in N pole and three poles of diode D1
Between the base stage of pipe VT2, described resistance R5 is serially connected between the N pole of diode D1 and the colelctor electrode of triode VT1.Described electric capacity
The positive pole of C2 is connected with the base stage of triode VT2, and its negative pole is connected with the emitter stage of triode VT1 after resistance R6.Institute
The positive pole stating electric capacity C3 is connected with the negative pole of electric capacity C2 after resistance R7, and its negative pole is connected with the negative pole of electric capacity C1.Described
The P pole of diode D2 is connected with the negative pole of electric capacity C3, and its N pole is connected with the emitter stage of triode VT1.Meanwhile, described electricity
The negative pole holding C2 is connected with the P pole of diode D3, and the negative pole of described electric capacity C3 is connected with the negative pole of electric capacity C4, described three poles
The emitter stage of pipe VT2 is connected with the P pole of diode D4.
Described three-terminal voltage-stabilizing circuit is by three terminal regulator U2, triode VT4, inductance L, resistance R9, resistance R10, resistance
R11, resistance R12, electric capacity C5, electric capacity C6, Zener diode D5 and diode D6 form.
During connection, one end of described inductance L is connected with the emitter stage of triode VT3, its other end and three terminal regulator
The VOUT pin of U2 is connected.The positive pole of described electric capacity C5 is connected with the emitter stage of triode VT3 after resistance R9, its negative pole
It is connected with the VOUT pin of three terminal regulator U2.The positive pole of described electric capacity C6 is connected with the VOUT pin of three terminal regulator U2
Connecing, its negative pole is connected with second-order filter circuit.One end of described resistance R10 is connected with the VIN pin of three terminal regulator U2,
Its other end is connected with the negative pole of electric capacity C6.The VOUT pin phase of the P pole of described Zener diode D5 and three terminal regulator U2
Connecting, its N pole is connected with the colelctor electrode of triode VT4.One end of described resistance R11 is connected with the base stage of triode VT4,
Its other end is connected with the negative pole of electric capacity C6.The P pole of described diode D6 emitter stage with triode VT4 after resistance R12
Being connected, its N pole is connected with the VOUT pin of three terminal regulator U2.Meanwhile, the VIN pin and three of described three terminal regulator U2
The base stage of pole pipe VT3 is connected, and its GND pin is grounded.The N pole of described diode D6 and the negative pole of electric capacity C6 collectively constitute three ends
The output of mu balanced circuit, the direct external connection electrical apparatus of this output.
As in figure 2 it is shown, described overvoltage crowbar is by FET Q, triode VT5, triode VT6, resistance R13, electricity
Resistance R14, resistance R15, resistance R16, resistance R17, resistance R18, electric capacity C7, electric capacity C8, diode D7 and diode D8 composition.
During connection, one end of described resistance R13 is connected with the negative pole of electric capacity C1, the grid of its other end and FET Q
Pole is connected.The positive pole of described electric capacity C7 is connected with the grid of FET Q, and its negative pole is connected with the base stage of triode VT5
Connect.One end of described resistance R14 is connected with the drain electrode of FET Q, and its other end is connected with the base stage of triode VT5.
The P pole of described diode D7 is connected with the negative pole of electric capacity C1, and its N pole is connected with the source electrode of FET Q.Described electric capacity C8
Positive pole be connected with the colelctor electrode of triode VT5, its negative pole is connected with the source electrode of FET Q after resistance R15.Described
One end of resistance R16 is connected with the negative pole of electric capacity C8, and its other end is connected with the emitter stage of triode VT6.Described resistance
R17 is serially connected between base stage and the emitter stage of triode VT5, and described resistance R18 is serially connected in colelctor electrode and the base stage of triode VT6
Between.The P pole of described diode D8 is connected with the base stage of triode VT6, and its N pole is connected with the negative pole of electric capacity C4.Meanwhile,
The emitter stage of described triode VT5 is connected with the colelctor electrode of triode VT6.
As it is shown on figure 3, described second-order filter circuit is by operational amplifier P1, operational amplifier P2, triode VT7, resistance
R19, resistance R20, resistance R21, resistance R22, resistance R23, electric capacity C9, electric capacity C10, electric capacity C11, electric capacity C12, diode D9 with
And diode D10 composition.
During connection, the positive pole of described electric capacity C9 is connected with the negative pole of electric capacity C4, and its negative pole is with operational amplifier P1 just
Input is connected.The positive pole of described electric capacity C12 is connected with the positive input terminal of operational amplifier P1 after resistance R19, and it is born
Pole is connected with the output of operational amplifier P1.The P pole of described diode D10 positive pole phase with electric capacity C12 after resistance R20
Connecting, its N pole is connected with the emitter stage of triode VT7.The positive pole of described electric capacity C10 after resistance R21 with operational amplifier
The negative input end of P1 is connected, its minus earth.The positive pole of described electric capacity C11 negative with operational amplifier P2 after resistance R22
Input is connected, its minus earth.The P pole of described diode D9 is connected with the positive pole of electric capacity C10, its N pole and electric capacity C11
Positive pole be connected.One end of described resistance R23 is connected with the P pole of diode D9, the base stage of its other end and triode VT7
It is connected.Meanwhile, the positive input terminal of described operational amplifier P2 is connected with the output of operational amplifier P1, described triode
The base stage of VT7 is connected with the negative pole of electric capacity C6.
The present invention can power electrical network or mains-supplied is processed, it is thus possible to be television set, electronic computer and numerical control
The electrical equipment such as device provide more galvanic current source, in order to improve the serviceability of electrical equipment.The present invention can also be to input electricity
The instant high-voltage of pressure eliminates or suppresses, and the electric appliance load that the present invention can be protected to connect is not damaged by high voltage, thus really
Stability and the reliability of the present invention are protected.Interference signal in signal can also be eliminated by the present invention, makes the signal of telecommunication more flat
Surely, it is thus possible to be further ensured that and provide more galvanic current source for electrical equipment.
As described above, just can preferably realize the present invention.
Claims (5)
1. the switching regulator filtering type voltage-stabilized power supply circuit based on overvoltage crowbar, it is characterised in that: main by transformer
T, diode rectifier U1, triode VT3, positive pole is connected with the positive output end of diode rectifier U1, negative pole and diode
The electric capacity C1 that the negative output terminal of rectifier U1 is connected, the power supply being connected with positive pole and the negative pole of electric capacity C1 respectively processes electricity
At road, the diode D4 that P pole is connected with power supply processing circuit, N pole is connected with the emitter stage of triode VT3, P pole and power supply
The reason diode D3 that circuit is connected, N pole is connected with the colelctor electrode of triode VT3 after resistance R8, positive pole and triode VT3
The electric capacity C4 that colelctor electrode is connected, negative pole is connected with the negative pole of electric capacity C1 after overvoltage crowbar, negative with electric capacity C4
The second-order filter circuit that pole is connected, and be connected with the base stage of triode VT3, emitter stage and second-order filter circuit respectively
Three-terminal voltage-stabilizing circuit forms；The emitter stage of described triode VT3 is also connected with the N pole of diode D3, and described transformer T's is former
The two ends composition power input of limit inductance coil, an input of described diode rectifier U1 and the secondary of transformer T
The non-same polarity of inductance coil is connected, its another input is connected with the Same Name of Ends of the secondary inductance coil of transformer T.
2. a kind of switching regulator filtering type voltage-stabilized power supply circuit based on overvoltage crowbar according to claim 1, it is special
Levy and be: described overvoltage crowbar is connected with the negative pole of electric capacity C1 by FET Q, triode VT5, triode VT6, one end
Connect, resistance R13 that the other end is connected with the grid of FET Q, positive pole is connected with the grid of FET Q, negative pole with
The electric capacity C7 that the base stage of triode VT5 is connected, one end is connected with the drain electrode of FET Q, the other end and triode VT5
The resistance R14 that base stage is connected, two poles that P pole is connected with the negative pole of electric capacity C1, N pole is connected with the source electrode of FET Q
Pipe D7, the electricity that positive pole is connected with the colelctor electrode of triode VT5, negative pole is connected with the source electrode of FET Q after resistance R15
Hold C8, the resistance R16 that one end is connected with the negative pole of electric capacity C8, the other end is connected with the emitter stage of triode VT6, be serially connected in
Resistance R17 between the base stage of triode VT5 and emitter stage, is serially connected in the resistance between the colelctor electrode of triode VT6 and base stage
R18, and the diode D8 composition that P pole is connected with the base stage of triode VT6, N pole is connected with the negative pole of electric capacity C4；Described
The emitter stage of triode VT5 is connected with the colelctor electrode of triode VT6.
3. a kind of switching regulator filtering type voltage-stabilized power supply circuit based on overvoltage crowbar according to claim 2, it is special
Levy and be: described second-order filter circuit is by operational amplifier P1, operational amplifier P2, triode VT7, and positive pole is negative with electric capacity C4's
The electric capacity C9 that pole is connected, negative pole is connected with the positive input terminal of operational amplifier P1, positive pole after resistance R19 with operation amplifier
The electric capacity C12 that the positive input terminal of device P1 is connected, negative pole is connected with the output of operational amplifier P1, P pole is after resistance R20
Be connected with the positive pole of electric capacity C12, diode D10 that N pole is connected with the emitter stage of triode VT7, positive pole is after resistance R21
Be connected with the negative input end of operational amplifier P1, the electric capacity C10 of minus earth, positive pole after resistance R22 with operational amplifier
The negative input end of P2 is connected, the electric capacity C11 of minus earth, and P pole is connected with the positive pole of electric capacity C10, N pole and electric capacity C11
The diode D9 that positive pole is connected, and one end is connected with the P pole of diode D9, the base stage phase of the other end and triode VT7
The resistance R23 composition connecting；The positive input terminal of described operational amplifier P2 is connected with the output of operational amplifier P1, described
The base stage of triode VT7 is connected with three-terminal voltage-stabilizing circuit.
4. a kind of switching regulator filtering type voltage-stabilized power supply circuit based on overvoltage crowbar according to claim 3, it is special
Levy and be: described power supply processing circuit, by triode VT1, triode VT2, is serially connected in the base stage of triode VT1 with electric capacity C1's
Resistance R1 between positive pole, the resistance R2 being serially connected between the base stage of triode VT1 and the negative pole of electric capacity C1, P pole and electric capacity C1
The diode D1 that positive pole is connected, N pole is connected with the colelctor electrode of triode VT2 after resistance R3, be serially connected in diode D1
N pole and the base stage of triode VT2 between resistance R4, be serially connected between the N pole of diode D1 and the colelctor electrode of triode VT1
Resistance R5, positive pole is connected with the base stage of triode VT2, negative pole is connected with the emitter stage of triode VT1 after resistance R6
Electric capacity C2, the electric capacity C3 that positive pole is connected with the negative pole of electric capacity C2 after resistance R7, negative pole is connected with the negative pole of electric capacity C1,
And the diode D2 composition that P pole is connected with the negative pole of electric capacity C3, N pole is connected with the emitter stage of triode VT1；Described electricity
The negative pole holding C2 is connected with the P pole of diode D3, and the negative pole of described electric capacity C3 is connected with the negative pole of electric capacity C4, described three poles
The emitter stage of pipe VT2 is connected with the P pole of diode D4.
5. a kind of switching regulator filtering type voltage-stabilized power supply circuit based on overvoltage crowbar according to claim 4, it is special
Levy and be: described three-terminal voltage-stabilizing circuit is connected with the emitter stage of triode VT3 by three terminal regulator U2, triode VT4, one end
Connect, inductance L that the other end is connected with the VOUT pin of three terminal regulator U2, positive pole after resistance R9 with the sending out of triode VT3
The electric capacity C5 that emitter-base bandgap grading is connected, negative pole is connected with the VOUT pin of three terminal regulator U2, positive pole is with three terminal regulator U2's
The VIN pipe of the electric capacity C6 that VOUT pin is connected, negative pole is connected with the base stage of triode VT7, one end and three terminal regulator U2
The resistance R10 that pin is connected, the other end is connected with the negative pole of electric capacity C6, P pole is connected with the VOUT pin of three terminal regulator U2
Connect, Zener diode D5 that N pole is connected with the colelctor electrode of triode VT4, one end is connected with the base stage of triode VT4, separately
The resistance R11 that one end is connected with the negative pole of electric capacity C6, and P pole is connected with the emitter stage of triode VT4 after resistance R12
Connect, diode D6 that N pole is connected with the VOUT pin of three terminal regulator U2 composition；The VIN pin of described three terminal regulator U2
Being connected with the base stage of triode VT3, its GND pin is grounded；The N pole of described diode D6 and the negative pole of electric capacity C6 collectively constitute
The output of three-terminal voltage-stabilizing circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610620677.4A CN106160531A (en) | 2016-07-29 | 2016-07-29 | A kind of switching regulator filtering type voltage-stabilized power supply circuit based on overvoltage crowbar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610620677.4A CN106160531A (en) | 2016-07-29 | 2016-07-29 | A kind of switching regulator filtering type voltage-stabilized power supply circuit based on overvoltage crowbar |
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| Publication Number | Publication Date |
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| CN106160531A true CN106160531A (en) | 2016-11-23 |
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ID=57327858
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|---|---|---|---|
| CN201610620677.4A Pending CN106160531A (en) | 2016-07-29 | 2016-07-29 | A kind of switching regulator filtering type voltage-stabilized power supply circuit based on overvoltage crowbar |
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| Country | Link |
|---|---|
| CN (1) | CN106160531A (en) |
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2016
- 2016-07-29 CN CN201610620677.4A patent/CN106160531A/en active Pending
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Application publication date: 20161123 |