CN106253705A - The frequency stabilization formula multiple-channel output linear stabilized power supply of circuit is eliminated based on ripple voltage - Google Patents
The frequency stabilization formula multiple-channel output linear stabilized power supply of circuit is eliminated based on ripple voltage Download PDFInfo
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- CN106253705A CN106253705A CN201610626199.8A CN201610626199A CN106253705A CN 106253705 A CN106253705 A CN 106253705A CN 201610626199 A CN201610626199 A CN 201610626199A CN 106253705 A CN106253705 A CN 106253705A
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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
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- 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
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M7/064—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode with several outputs
-
- 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
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M7/068—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode mounted on a transformer
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a kind of frequency stabilization formula multiple-channel output linear stabilized power supply eliminating circuit based on ripple voltage, it is characterized in that: main by control chip U2, audion VT2, transformator T, the linear regulation circuit being connected with the former limit of transformator T, the compositions such as the ripple voltage being connected with linear regulation circuit eliminates circuit, the current rectifying and wave filtering circuit being connected with ripple voltage elimination circuit.DC voltage after rectifying and wave-filtering can be processed by the present invention, and the stability making output voltage is higher；The voltage signal of outfan can also be fed back to input by the present invention simultaneously, and constantly adjusts output voltage according to feedback signal, thus reduces output voltage and the error set between output voltage, greatly improves the precision of the present invention.Meanwhile, the ripple voltage of residual can be eliminated by the present invention, reduces ripple coefficient, eliminates the interference of ripple voltage, thus greatly improve the stability of the present invention.
Description
Technical field
The present invention relates to a kind of power supply, specifically refer to a kind of frequency stabilization formula multiple-channel output line eliminating circuit based on ripple voltage
Property regulated power supply.
Background technology
Linear stabilized power supply is a kind of power converting circuit, is the important component part of electronic system, and it is electronic circuit
Electric energy needed for providing with electrical equipment.Along with the development of electronic technology, the performance of linear stabilized power supply improves a lot,
But precision that existing linear stabilized power supply still exists the biggest defect, i.e. its output voltage is the highest, its actual output
Voltage is bigger with the error of design output voltage, it is impossible to meet the demand of people.
Present invention
It is an object of the invention to solve the defect that the precision of current linear stabilized power supply output voltage is the highest, it is provided that one
Plant the frequency stabilization formula multiple-channel output linear stabilized power supply eliminating circuit based on ripple voltage.
The purpose of the present invention is by following technical proposals reality: eliminate the frequency stabilization formula multiple-channel output of circuit based on ripple voltage
Linear stabilized power supply, mainly by control chip U2, audion VT2, transformator T, the linear tune being connected with the former limit of transformator T
Whole circuit, the ripple voltage being connected with linear regulation circuit eliminates circuit, eliminates, with ripple voltage, the rectification that circuit is connected
Filter circuit, the modification output circuit being connected with the OUT pin of control chip U2, the frequency stabilization being connected with modification output circuit
Circuit, the first output circuit being connected with the secondary inductance coil L5 of transformator T, with the secondary inductance coil L6 of transformator T
The second output circuit being connected, N pole is connected with the colelctor electrode of audion VT2, P pole after resistance R4 with modification output circuit
Two poles that diode D5, N pole is connected with the FB pin of control chip U2, P pole is connected with the P pole of diode D5 being connected
Pipe D6, the electric capacity C7 that negative pole is connected with the COMP pin of control chip U2, positive pole is connected with the P pole of diode D5, with electricity
Hold resistance R5, the N pole ground connection that is in parallel of C7, diode that P pole is connected with the OUT pin of control chip U2 after resistance R7
D7, the resistance R6 being serially connected between the N pole of diode D7 and the GND pin of control chip U2, be serially connected in the RT/ of control chip U2
Resistance R8 between the base stage of CT pin and audion VT2, positive pole is connected with the REF pin of control chip U2, negative pole and tune
Electric capacity C9, the P pole that output circuit processed is connected is connected with the emitter stage of audion VT2, N pole is connected with the negative pole of electric capacity C9
Diode D8, and positive pole is connected with the CS pin of control chip U2, negative pole is connected with the emitter stage of audion VT2
Electric capacity C8 forms；Described frequency stabilization circuit is connected with the non-same polarity of the former limit inductance coil L3 of transformator T；Described control chip
The VCC pin of U2 is connected with linear regulation circuit.
Further, described ripple voltage eliminates circuit by audion VT6, audion VT7, audion VT8, audion
VT9, audion VT10, one end is connected with the colelctor electrode of audion VT8, the other end eliminates the defeated of circuit as this ripple voltage
Enter the resistance R23 of end, the electricity that positive pole is connected, negative pole is connected with the colelctor electrode of audion VT6 with the colelctor electrode of audion VT8
Holding C19, negative pole emitter stage with audion VT9 after resistance R27 is connected, the electric capacity C20 of plus earth, is serially connected in electric capacity
Resistance R24 between positive pole and the emitter stage of audion VT6 of C20, negative pole is connected with the base stage of audion VT9, positive pole warp
Electric capacity C21, the P pole that after resistance R25, base stage with audion VT8 is connected is connected with the colelctor electrode of audion VT8, N pole warp
The diode D19 that after resistance R29, base stage with audion VT10 is connected, is serially connected in N pole and the audion VT9 of diode D19
Colelctor electrode between resistance R26, resistance R28, the P pole being serially connected between the N pole of diode D19 and the negative pole of electric capacity C21 with
The diode D20 that the base stage of audion VT9 is connected, N pole is connected with the base stage of audion VT10, positive pole and audion VT10
Base stage be connected, negative pole eliminates the electric capacity C22 of outfan of circuit as this ripple voltage, is serially connected in the negative pole of electric capacity C22
And the resistance R30 between the colelctor electrode of audion VT10, and positive pole is connected with the emitter stage of audion VT10, minus earth
Electric capacity C23 composition；The colelctor electrode of described audion VT7 is connected with the colelctor electrode of audion VT8, its base stage then with audion
The emitter stage of VT8 is connected, its emitter stage is connected with the base stage of audion VT6；Described ripple eliminate circuit input with
Current rectifying and wave filtering circuit is connected, its outfan is then connected with linear regulation circuit.
Described frequency stabilization circuit is by audion VT3, audion VT4, audion VT5, field effect transistor MOS, amplifier P5, negative pole
Be connected with the base stage of audion VT3, electric capacity C14 that positive pole is connected with modification output circuit, the base of one end and audion VT3
The resistance R17 that pole is connected, other end base stage with audion VT4 after resistance R19 is connected, positive pole is with audion VT4's
Electric capacity C16, the N pole that base stage is connected, negative pole emitter stage with audion VT3 after resistance R20 is connected is with audion VT3's
Emitter stage is connected, the diode D15 of P pole ground connection, and positive pole is connected with the colelctor electrode of audion VT3, negative pole and field effect transistor
Electric capacity C15, the N pole that the grid of MOS is connected colelctor electrode with audion VT3 after resistance R18 is connected, P pole and amplifier
Diode D16, N pole ground connection that the positive pole of P5 is connected, P pole emitter stage with audion VT4 after inductance L9 be connected two
Pole pipe D17, is serially connected in the resistance R22 between N pole and the source electrode of field effect transistor MOS of diode D17, negative pole and field effect transistor
The drain electrode of MOS is connected, positive pole positive pole with amplifier P5 after resistance R21 is connected ground capacity C17, N pole and audion VT5
The Zener diode D18 that emitter stage is connected, P pole is connected with the source electrode of field effect transistor MOS, and positive pole and amplifier P5
The electric capacity C18 that outfan is connected, negative pole is connected with the non-same polarity of the former limit inductance coil L3 of transformator T composition；Institute
The positive pole of the colelctor electrode and amplifier P5 of stating audion VT4 is connected；The base stage of described audion VT5 and the positive pole of electric capacity C17
Be connected, its colelctor electrode is connected with the negative pole of amplifier P5.
Described current rectifying and wave filtering circuit by diode rectifier U1, and positive pole after inductance L1 with diode rectifier U1 just
The electric capacity C1 composition that pole outfan is connected, negative pole cathode output end with diode rectifier U1 after inductance L2 is connected；
The input that the positive pole of described electric capacity C1 eliminates circuit with ripple voltage is connected, its minus earth.
Described linear regulation circuit is connected with the colelctor electrode of audion VT1 by audion VT1, P pole, N pole is electric with ripple
Pressure eliminates the diode D1 that is connected of outfan of circuit, the non-same polarity phase of negative pole and the former limit inductance coil L4 of transformator T
The polar capacitor C2 that connection, positive pole are connected with the N pole of diode D1 after resistance R1, the resistance being in parallel with diode D1
R2, the electric capacity C3 that positive pole is connected with the emitter stage of audion VT1, negative pole is connected with the negative pole of polar capacitor C2, positive pole with
The electric capacity C4 that the N pole of diode D1 is connected, negative pole negative pole with electric capacity C3 after resistance R3 is connected, negative pole is with electric capacity C4's
Electric capacity C5, the N pole that positive pole is connected, positive pole is connected with the Same Name of Ends of the former limit inductance coil L3 of transformator T is with transformator T's
Diode D3, the P pole that the non-same polarity of former limit inductance coil L3 is connected, P pole is connected with the negative pole of electric capacity C4 and transformator T
The Same Name of Ends of former limit inductance coil L4 be connected, N pole is connected with the VCC pin of control chip U2 after diode D2 two
Pole pipe D4, and positive pole is connected with the N pole of diode D4, the polar capacitor C6 of minus earth composition；Described audion VT1's
Base stage is connected with the positive pole of polar capacitor C2.
Described modification output circuit, by amplifier P1, amplifier P2, amplifier P3, amplifier P4, is serially connected in electric capacity C9's
Resistance R9 between the positive pole of negative pole and amplifier P1, is serially connected in the resistance R10, N between negative pole and the outfan of amplifier P1
Diode D10, the N pole that pole is connected with the outfan of amplifier P1, P pole is connected with the positive pole of amplifier P2 and amplifier P2
The diode D9 that negative pole is connected, P pole is connected with the OUT pin of control chip U2, be serially connected in the outfan of amplifier P2
And the resistance R11 between the negative pole of amplifier P4, it is serially connected in the resistance R12 between outfan and the positive pole of amplifier P3, and
The potentiometer that one end is connected with the outfan of amplifier P4, other end positive pole with amplifier P3 after resistance R13 is connected
R14 forms；The minus earth of described amplifier P1；The outfan of described amplifier P4 after resistance R4 with the P pole of diode D5
Be connected, its positive pole is connected with the outfan of amplifier P3；The control end phase of the negative pole of described amplifier P3 and potentiometer R14
Connect；The junction point of described resistance R13 and potentiometer R14 is connected with the positive pole of electric capacity C14.
Described first output circuit is extremely connected by Zener diode D11, N pole N with Zener diode D11 after inductance L7
Connect, Zener diode D12 that P pole Same Name of Ends with the secondary inductance coil L5 of transformator T after resistance R15 is connected, positive pole
Be connected with the N pole of Zener diode D11, electric capacity that negative pole is connected with the Same Name of Ends of the secondary inductance coil L5 of transformator T
C10, and the electric capacity that positive pole is connected with the N pole of Zener diode D12, negative pole is connected with the P pole of Zener diode D12
C11 forms；The P pole of described Zener diode D11 is connected with the non-same polarity of the secondary inductance coil L5 of transformator T；Described
The positive pole of electric capacity C11 and negative pole are collectively forming the outfan of this first output circuit.
Described second output circuit is extremely connected by Zener diode D13, N pole N with Zener diode D13 after inductance L8
Connect, Zener diode D14 that P pole Same Name of Ends with the secondary inductance coil L6 of transformator T after resistance R16 is connected, positive pole
Be connected with the N pole of Zener diode D13, electric capacity that negative pole is connected with the Same Name of Ends of the secondary inductance coil L6 of transformator T
C12, and the electric capacity that positive pole is connected with the N pole of Zener diode D14, negative pole is connected with the P pole of Zener diode D14
C13 forms；The P pole of described Zener diode D13 is connected with the non-same polarity of the secondary inductance coil L6 of transformator T；Described
The positive pole of electric capacity C13 and negative pole are collectively forming the outfan of this second output circuit.
Described control chip U2 is the integrated chip of UC3842.
The present invention compared with prior art has the following advantages and beneficial effect:
(1) DC voltage after rectifying and wave-filtering can be processed by the present invention, and the stability making output voltage is higher；With
Time the present invention voltage signal of outfan can also feed back to input, and constantly adjust output electricity according to feedback signal
Pressure, thus reduce output voltage and the error set between output voltage, greatly improve the precision of the present invention.
(2) present configuration is simple, and uses the integrated chip of UC3842 to combine with peripheral circuit, greatly reduces this
The energy consumption of invention.
(3) frequency of voltage can be processed by the present invention, makes electric voltage frequency more stable, it is to avoid due to electric voltage frequency
Fluctuating excessive, wave distortion is big and causes damage to by electric loading.
(4) ripple voltage of residual can be eliminated by the present invention, reduces ripple coefficient, eliminates ripple voltage
Interference, thus greatly improve the stability of the present invention.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the structure chart of the frequency stabilization circuit of the present invention.
Fig. 3 is the structure chart of the ripple voltage elimination 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 it is shown in figure 1, the present invention is mainly by the former limit phase of control chip U2, audion VT2, transformator T, with transformator T
The linear regulation circuit connected, the ripple voltage being connected with linear regulation circuit eliminates circuit, eliminates circuit with ripple voltage
The current rectifying and wave filtering circuit being connected, the modification output circuit being connected with the OUT pin of control chip U2, with modification output circuit
The frequency stabilization circuit being connected, the first output circuit being connected with the secondary inductance coil L5 of transformator T, with the pair of transformator T
The second output circuit that limit inductance coil L6 is connected, N pole is connected with the colelctor electrode of audion VT2, P pole after resistance R4 with
Diode D5, the N pole that modification output circuit is connected is connected with the FB pin of control chip U2, the P pole of P pole and diode D5
The diode D6 being connected, negative pole is connected with the COMP pin of control chip U2, positive pole is connected with the P pole of diode D5
Electric capacity C7, resistance R5, the N pole ground connection being in parallel with electric capacity C7, P pole OUT pin with control chip U2 after resistance R7 is connected
The diode D7 connect, the resistance R6 being serially connected between the N pole of diode D7 and the GND pin of control chip U2, be serially connected in control
Resistance R8 between RT/CT pin and the base stage of audion VT2 of chip U2, positive pole is connected with the REF pin of control chip U2
Connect, electric capacity C9, P pole that negative pole is connected with modification output circuit is connected with the emitter stage of audion VT2, N pole and electric capacity C9
The diode D8 that is connected of negative pole, and positive pole is connected with the CS pin of control chip U2, negative pole is sent out with audion VT2's
The electric capacity C8 composition that emitter-base bandgap grading is connected.Described frequency stabilization circuit is connected with the non-same polarity of the former limit inductance coil L3 of transformator T.
The VCC pin of described control chip U2 is connected with linear regulation circuit.In order to preferably implement the present invention, this control chip U2
The preferential employing integrated chip of UC3842 realizes.
Wherein, described current rectifying and wave filtering circuit by diode rectifier U1, and positive pole after inductance L1 with diode rectifier
The electric capacity C1 that the cathode output end of U1 is connected, negative pole cathode output end with diode rectifier U1 after inductance L2 is connected
Composition.The input that the positive pole of described electric capacity C1 eliminates circuit with ripple voltage is connected, its minus earth.Described diode is whole
The input termination civil power of stream device U1.
This linear regulation circuit is by audion VT1, resistance R1, resistance R2, resistance R3, diode D1, diode D2, two poles
Pipe D3, diode D4, polar capacitor C2, electric capacity C3, electric capacity C4, electric capacity C5 and polar capacitor C6 form.
During connection, the P pole of diode D1 is connected with the colelctor electrode of audion VT1, and N pole eliminates circuit with ripple voltage
Outfan is connected.The negative pole of polar capacitor C2 is connected with the non-same polarity of the former limit inductance coil L4 of transformator T, positive pole warp
After resistance R1, the N pole with diode D1 is connected.Resistance R2 is in parallel with diode D1.The positive pole of electric capacity C3 and audion VT1
Emitter stage be connected, negative pole is connected with the negative pole of polar capacitor C2.The positive pole of electric capacity C4 is extremely connected with the N of diode D1
Connecing, negative pole negative pole with electric capacity C3 after resistance R3 is connected.The negative pole of electric capacity C5 is connected with the positive pole of electric capacity C4, positive pole with
The Same Name of Ends of the former limit inductance coil L3 of transformator T is connected.The N pole of diode D3 and the former limit inductance coil L3 of transformator T
Non-same polarity be connected, P pole is connected with the negative pole of electric capacity C4.The P pole of diode D4 and the former limit inductance coil of transformator T
The Same Name of Ends of L4 is connected, and N pole VCC pin with control chip U2 after diode D2 is connected.The positive pole of polar capacitor C6
It is connected with the N pole of diode D4, minus earth.The base stage of described audion VT1 is connected with the positive pole of polar capacitor C2.Institute
The non-same polarity of the former limit inductance coil L3 stating transformator T is connected with modification output circuit.
Described modification output circuit by amplifier P1, amplifier P2, amplifier P3, amplifier P4, resistance R9, resistance R10,
Resistance R11, resistance R12, resistance R13, potentiometer R14, diode D9 and diode D10 form.
During connection, resistance R9 is serially connected between the negative pole of electric capacity C9 and the positive pole of amplifier P1.Resistance R10 is serially connected in amplification
Between negative pole and the outfan of device P1.The N pole of diode D10 is connected with the outfan of amplifier P1, and P pole is with amplifier P2's
Positive pole is connected.The N pole of diode D9 is connected with the negative pole of amplifier P2, and P pole is connected with the OUT pin of control chip U2
Connect.Resistance R11 is serially connected between the outfan of amplifier P2 and the negative pole of amplifier P4.Resistance R12 is serially connected in amplifier P3's
Between outfan and positive pole.One end of potentiometer R14 is connected with the outfan of amplifier P4, the other end after resistance R13 with
The positive pole of amplifier P3 is connected.
Meanwhile, the minus earth of described amplifier P1.The outfan of described amplifier P4 after resistance R4 with diode D5
P pole be connected, its positive pole is connected with the outfan of amplifier P3.The negative pole of described amplifier P3 and the control of potentiometer R14
End processed is connected.The junction point of described resistance R13 and potentiometer R14 is connected with frequency stabilization circuit.
This first output circuit by Zener diode D11, Zener diode D12, electric capacity C10, electric capacity C11, inductance L7 with
And resistance R15 composition.
N pole with Zener diode D11 after inductance L7, the N pole of this Zener diode D12 is connected, and P pole is through resistance R15
Same Name of Ends with the secondary inductance coil L5 of transformator T is connected afterwards.The N pole phase of the positive pole of electric capacity C10 and Zener diode D11
Connecting, negative pole is connected with the Same Name of Ends of the secondary inductance coil L5 of transformator T.The positive pole of electric capacity C11 and Zener diode D12
N pole be connected, negative pole is connected with the P pole of Zener diode D12.The P pole of described Zener diode D11 is with transformator T's
The non-same polarity of secondary inductance coil L5 is connected.The positive pole of described electric capacity C11 and negative pole are collectively forming this first output circuit
Outfan.
It addition, the second output circuit is by Zener diode D13, Zener diode D14, electric capacity C12, inductance L8, electric capacity C13
And resistance R16 composition.
Meanwhile, N pole with Zener diode D13 after inductance L8, the N pole of Zener diode D14 is connected, and P pole is through resistance
After R16, the Same Name of Ends of secondary inductance coil L6 with transformator T is connected.The positive pole of electric capacity C12 and the N of Zener diode D13
Pole is connected, and negative pole is connected with the Same Name of Ends of the secondary inductance coil L6 of transformator T.The positive pole of electric capacity C13 and voltage stabilizing two pole
The N pole of pipe D14 is connected, and negative pole is connected with the P pole of Zener diode D14.The P pole of described Zener diode D13 and transformation
The non-same polarity of the secondary inductance coil L6 of device T is connected.The positive pole of described electric capacity C13 and negative pole are collectively forming this second output
The outfan of circuit.
The structure of this frequency stabilization circuit is as in figure 2 it is shown, it is by audion VT3, audion VT4, audion VT5, field effect transistor
MOS, amplifier P5, resistance R17, resistance R18, resistance R19, resistance R20, resistance R21, resistance R22, electric capacity C14, electric capacity C15,
Electric capacity C16, electric capacity C17, electric capacity C18, inductance L9, diode D15, diode D16, diode D17 and Zener diode D18
Composition.
During connection, the negative pole of electric capacity C14 is connected with the base stage of audion VT3, positive pole and resistance R13 and potentiometer R14
Junction point be connected.One end of resistance R17 is connected with the base stage of audion VT3, the other end after resistance R19 with audion
The base stage of VT4 is connected.The positive pole of electric capacity C16 is connected with the base stage of audion VT4, negative pole after resistance R20 with audion
The emitter stage of VT3 is connected.The N pole of diode D15 is connected with the emitter stage of audion VT3, P pole ground connection.Electric capacity C15 is just
Pole is connected with the colelctor electrode of audion VT3, and negative pole is connected with the grid of field effect transistor MOS.The N pole of diode D16 is through electricity
Being connected with the colelctor electrode of audion VT3 after resistance R18, P pole is connected with the positive pole of amplifier P5.The N pole of diode D17 connects
Ground, P pole emitter stage with audion VT4 after inductance L9 is connected.Resistance R22 is serially connected in N pole and the field effect of diode D17
Between the source electrode of pipe MOS.The negative pole of electric capacity C17 is connected with the drain electrode of field effect transistor MOS, positive pole after resistance R21 with amplification
The positive pole of device P5 is connected.The N pole of Zener diode D18 is connected with the emitter stage of audion VT5, P pole and field effect transistor MOS
Source electrode be connected.The positive pole of electric capacity C18 is connected with the outfan of amplifier P5, negative pole and the former limit inductor wire of transformator T
The non-same polarity of circle L3 is connected.The colelctor electrode of described audion VT4 is connected with the positive pole of amplifier P5.Described audion
The base stage of VT5 is connected with the positive pole of electric capacity C17, and its colelctor electrode is connected with the negative pole of amplifier P5.
This ripple voltage eliminate circuit structure as it is shown on figure 3, it is by audion VT6, audion VT7, audion VT8,
Audion VT9, audion VT10, resistance R23, resistance R24, resistance R25, resistance R26, resistance R27, resistance R28, resistance R29,
Resistance R30, electric capacity C19, electric capacity C20, electric capacity C21, electric capacity C22, electric capacity C23, diode D19 and diode D20 form.
During connection, one end of resistance R23 is connected with the colelctor electrode of audion VT8, and the other end disappears as this ripple voltage
Except the input of circuit and it is connected with the positive pole of electric capacity C1.The positive pole of electric capacity C19 is connected with the colelctor electrode of audion VT8,
Negative pole is connected with the colelctor electrode of audion VT6.The negative pole of electric capacity C20 emitter stage with audion VT9 after resistance R27 is connected
Connect, plus earth.Resistance R24 is serially connected between the positive pole of electric capacity C20 and the emitter stage of audion VT6.The negative pole of electric capacity C21 with
The base stage of audion VT9 is connected, and positive pole base stage with audion VT8 after resistance R25 is connected.The P pole of diode D19 with
The colelctor electrode of audion VT8 is connected, and N pole base stage with audion VT10 after resistance R29 is connected.Resistance R26 is serially connected in
Between N pole and the colelctor electrode of audion VT9 of diode D19.Resistance R28 is serially connected in the N pole of diode D19 and electric capacity C21's
Between negative pole.The P pole of diode D20 is connected with the base stage of audion VT9, and N pole is connected with the base stage of audion VT10.Electricity
The positive pole holding C22 is connected with the base stage of audion VT10, and negative pole eliminates the outfan of circuit and with two as this ripple voltage
The N pole of pole pipe D1 is connected.Resistance R30 is serially connected between the negative pole of electric capacity C22 and the colelctor electrode of audion VT10.Electric capacity C23
Positive pole be connected with the emitter stage of audion VT10, minus earth.The colelctor electrode of described audion VT7 is with audion VT8's
Colelctor electrode is connected, and its base stage then emitter stage with audion VT8 is connected, and its emitter stage is connected with the base stage of audion VT6
Connect.
DC voltage after rectifying and wave-filtering can be processed by the present invention, and the stability making output voltage is higher；Simultaneously
The voltage signal of outfan can also be fed back to input by the present invention, and constantly adjusts output voltage according to feedback signal,
Thus reduce output voltage and the error set between output voltage, greatly improve the precision of the present invention.The present invention is permissible
The frequency of voltage is processed, makes electric voltage frequency more stable, it is to avoid owing to electric voltage frequency fluctuation is excessive, wave distortion big and
Damage is caused to by electric loading.Meanwhile, the ripple voltage of residual can be eliminated by the present invention, reduces ripple coefficient, row
Except the interference of ripple voltage, thus greatly improve the stability of the present invention.
As it has been described above, just can well realize the present invention.
Claims (9)
1. the frequency stabilization formula multiple-channel output linear stabilized power supply of circuit is eliminated based on ripple voltage, it is characterised in that: main by controlling
The linear regulation circuit that the former limit of chip U2, audion VT2, transformator T, with transformator T is connected, with linear regulation circuit phase
The ripple voltage connected eliminates circuit, eliminates, with ripple voltage, the current rectifying and wave filtering circuit that circuit is connected, with control chip U2's
The modification output circuit that OUT pin is connected, the frequency stabilization circuit being connected with modification output circuit, with the secondary electricity of transformator T
The first output circuit that sense coil L5 is connected, the second output circuit being connected with the secondary inductance coil L6 of transformator T, N
Diode D5, the N pole that pole is connected with the colelctor electrode of audion VT2, P pole is connected with modification output circuit after resistance R4 with
The diode D6 that the FB pin of control chip U2 is connected, P pole is connected with the P pole of diode D5, negative pole and control chip U2
The electric capacity C7 that COMP pin is connected, positive pole is connected with the P pole of diode D5, resistance R5, the N pole being in parallel with electric capacity C7
The diode D7 that ground connection, P pole are connected with the OUT pin of control chip U2 after resistance R7, be serially connected in diode D7 N pole and
Resistance R6 between the GND pin of control chip U2, is serially connected in RT/CT pin and the base stage of audion VT2 of control chip U2
Between resistance R8, the electric capacity that REF pin is connected, negative pole is connected with modification output circuit of positive pole and control chip U2
The diode D8 that C9, P pole is connected with the emitter stage of audion VT2, N pole is connected with the negative pole of electric capacity C9, and positive pole with
The electric capacity C8 composition that the CS pin of control chip U2 is connected, negative pole is connected with the emitter stage of audion VT2；Described frequency stabilization electricity
Road is connected with the non-same polarity of the former limit inductance coil L3 of transformator T；The VCC pin of described control chip U2 and Serial regulation
Circuit is connected.
The frequency stabilization formula multiple-channel output linear stabilized power supply eliminating circuit based on ripple voltage the most according to claim 1, its
It is characterised by: described ripple voltage eliminates circuit by audion VT6, audion VT7, audion VT8, audion VT9, audion
VT10, one end is connected with the colelctor electrode of audion VT8, the other end eliminates the resistance of input of circuit as this ripple voltage
R23, the electric capacity C19 that positive pole is connected with the colelctor electrode of audion VT8, negative pole is connected with the colelctor electrode of audion VT6, negative pole
After resistance R27 the emitter stage with audion VT9 be connected, the electric capacity C20 of plus earth, be serially connected in electric capacity C20 positive pole and
Resistance R24 between the emitter stage of audion VT6, negative pole is connected with the base stage of audion VT9, positive pole after resistance R25 with
Electric capacity C21, the P pole that the base stage of audion VT8 is connected is connected with the colelctor electrode of audion VT8, N pole after resistance R29 with
The diode D19 that the base stage of audion VT10 is connected, is serially connected between the N pole of diode D19 and the colelctor electrode of audion VT9
Resistance R26, the base of resistance R28, the P pole being serially connected between the N pole of diode D19 and the negative pole of electric capacity C21 and audion VT9
The diode D20 that pole is connected, N pole is connected with the base stage of audion VT10, positive pole is connected with the base stage of audion VT10,
Negative pole eliminates the electric capacity C22 of outfan of circuit as this ripple voltage, is serially connected in the negative pole of electric capacity C22 and audion VT10
Resistance R30 between colelctor electrode, and positive pole is connected with the emitter stage of audion VT10, the electric capacity C23 of minus earth composition；
The colelctor electrode of described audion VT7 is connected with the colelctor electrode of audion VT8, its base stage then with the emitter stage phase of audion VT8
Connect, its emitter stage is connected with the base stage of audion VT6；Described ripple eliminates input and the current rectifying and wave filtering circuit phase of circuit
Connect, its outfan is then connected with linear regulation circuit.
The frequency stabilization formula multiple-channel output linear stabilized power supply eliminating circuit based on ripple voltage the most according to claim 2, its
It is characterised by: described frequency stabilization circuit, by audion VT3, audion VT4, audion VT5, field effect transistor MOS, amplifier P5, is born
The electric capacity C14 that pole is connected with the base stage of audion VT3, positive pole is connected with modification output circuit, one end is with audion VT3's
The resistance R17 that base stage is connected, other end base stage with audion VT4 after resistance R19 is connected, positive pole and audion VT4
Electric capacity C16, the N pole that base stage is connected, negative pole emitter stage with audion VT3 after resistance R20 is connected and audion VT3
Emitter stage be connected, the diode D15 of P pole ground connection, positive pole is connected with the colelctor electrode of audion VT3, negative pole and field effect
Electric capacity C15, the N pole that the grid of pipe MOS is connected colelctor electrode with audion VT3 after resistance R18 is connected, P pole and amplification
Diode D16, N pole ground connection that the positive pole of device P5 is connected, P pole emitter stage with audion VT4 after inductance L9 is connected
Diode D17, is serially connected in the resistance R22 between N pole and the source electrode of field effect transistor MOS of diode D17, negative pole and field effect transistor
The drain electrode of MOS is connected, positive pole positive pole with amplifier P5 after resistance R21 is connected ground capacity C17, N pole and audion VT5
The Zener diode D18 that emitter stage is connected, P pole is connected with the source electrode of field effect transistor MOS, and positive pole and amplifier P5
The electric capacity C18 that outfan is connected, negative pole is connected with the non-same polarity of the former limit inductance coil L3 of transformator T composition；Institute
The positive pole of the colelctor electrode and amplifier P5 of stating audion VT4 is connected；The base stage of described audion VT5 and the positive pole of electric capacity C17
Be connected, its colelctor electrode is connected with the negative pole of amplifier P5.
The frequency stabilization formula multiple-channel output linear stabilized power supply eliminating circuit based on ripple voltage the most according to claim 3, its
Be characterised by: described current rectifying and wave filtering circuit by diode rectifier U1, and positive pole after inductance L1 with diode rectifier U1's
The electric capacity C1 group that cathode output end is connected, negative pole cathode output end with diode rectifier U1 after inductance L2 is connected
Become；The input that the positive pole of described electric capacity C1 eliminates circuit with ripple voltage is connected, its minus earth.
The frequency stabilization formula multiple-channel output linear stabilized power supply eliminating circuit based on ripple voltage the most according to claim 4, its
It is characterised by: described linear regulation circuit is connected with the colelctor electrode of audion VT1 by audion VT1, P pole, N pole is electric with ripple
Pressure eliminates the diode D1 that is connected of outfan of circuit, the non-same polarity phase of negative pole and the former limit inductance coil L4 of transformator T
The polar capacitor C2 that connection, positive pole are connected with the N pole of diode D1 after resistance R1, the resistance being in parallel with diode D1
R2, the electric capacity C3 that positive pole is connected with the emitter stage of audion VT1, negative pole is connected with the negative pole of polar capacitor C2, positive pole with
The electric capacity C4 that the N pole of diode D1 is connected, negative pole negative pole with electric capacity C3 after resistance R3 is connected, negative pole is with electric capacity C4's
Electric capacity C5, the N pole that positive pole is connected, positive pole is connected with the Same Name of Ends of the former limit inductance coil L3 of transformator T is with transformator T's
Diode D3, the P pole that the non-same polarity of former limit inductance coil L3 is connected, P pole is connected with the negative pole of electric capacity C4 and transformator T
The Same Name of Ends of former limit inductance coil L4 be connected, N pole is connected with the VCC pin of control chip U2 after diode D2 two
Pole pipe D4, and positive pole is connected with the N pole of diode D4, the polar capacitor C6 of minus earth composition；Described audion VT1's
Base stage is connected with the positive pole of polar capacitor C2.
The frequency stabilization formula multiple-channel output linear stabilized power supply eliminating circuit based on ripple voltage the most according to claim 5, its
It is characterised by: described modification output circuit, by amplifier P1, amplifier P2, amplifier P3, amplifier P4, is serially connected in electric capacity C9's
Resistance R9 between the positive pole of negative pole and amplifier P1, is serially connected in the resistance R10, N between negative pole and the outfan of amplifier P1
Diode D10, the N pole that pole is connected with the outfan of amplifier P1, P pole is connected with the positive pole of amplifier P2 and amplifier P2
The diode D9 that negative pole is connected, P pole is connected with the OUT pin of control chip U2, be serially connected in the outfan of amplifier P2
And the resistance R11 between the negative pole of amplifier P4, it is serially connected in the resistance R12 between outfan and the positive pole of amplifier P3, and
The potentiometer that one end is connected with the outfan of amplifier P4, other end positive pole with amplifier P3 after resistance R13 is connected
R14 forms；The minus earth of described amplifier P1；The outfan of described amplifier P4 after resistance R4 with the P pole of diode D5
Be connected, its positive pole is connected with the outfan of amplifier P3；The control end phase of the negative pole of described amplifier P3 and potentiometer R14
Connect；The junction point of described resistance R13 and potentiometer R14 is connected with the positive pole of electric capacity C14.
The frequency stabilization formula multiple-channel output linear stabilized power supply eliminating circuit based on ripple voltage the most according to claim 6, its
Be characterised by: described first output circuit by Zener diode D11, N pole after inductance L7 with the N pole phase of Zener diode D11
Connect, Zener diode D12 that P pole Same Name of Ends with the secondary inductance coil L5 of transformator T after resistance R15 is connected, just
The electricity that pole is connected with the N pole of Zener diode D11, negative pole is connected with the Same Name of Ends of the secondary inductance coil L5 of transformator T
Hold C10, and the electric capacity that positive pole is connected, negative pole is connected with the P pole of Zener diode D12 with the N pole of Zener diode D12
C11 forms；The P pole of described Zener diode D11 is connected with the non-same polarity of the secondary inductance coil L5 of transformator T；Described
The positive pole of electric capacity C11 and negative pole are collectively forming the outfan of this first output circuit.
The frequency stabilization formula multiple-channel output linear stabilized power supply eliminating circuit based on ripple voltage the most according to claim 7, its
Be characterised by: described second output circuit by Zener diode D13, N pole after inductance L8 with the N pole phase of Zener diode D13
Connect, Zener diode D14 that P pole Same Name of Ends with the secondary inductance coil L6 of transformator T after resistance R16 is connected, just
The electricity that pole is connected with the N pole of Zener diode D13, negative pole is connected with the Same Name of Ends of the secondary inductance coil L6 of transformator T
Hold C12, and the electric capacity that positive pole is connected, negative pole is connected with the P pole of Zener diode D14 with the N pole of Zener diode D14
C13 forms；The P pole of described Zener diode D13 is connected with the non-same polarity of the secondary inductance coil L6 of transformator T；Described
The positive pole of electric capacity C13 and negative pole are collectively forming the outfan of this second output circuit.
The frequency stabilization formula multiple-channel output linear stabilized power supply eliminating circuit based on ripple voltage the most according to claim 8, its
It is characterised by: described control chip U2 is the integrated chip of UC3842.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610626199.8A CN106253705A (en) | 2016-08-02 | 2016-08-02 | The frequency stabilization formula multiple-channel output linear stabilized power supply of circuit is eliminated based on ripple voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610626199.8A CN106253705A (en) | 2016-08-02 | 2016-08-02 | The frequency stabilization formula multiple-channel output linear stabilized power supply of circuit is eliminated based on ripple voltage |
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| Publication Number | Publication Date |
|---|---|
| CN106253705A true CN106253705A (en) | 2016-12-21 |
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ID=57606753
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|---|---|---|---|
| CN201610626199.8A Withdrawn CN106253705A (en) | 2016-08-02 | 2016-08-02 | The frequency stabilization formula multiple-channel output linear stabilized power supply of circuit is eliminated based on ripple voltage |
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| CN (1) | CN106253705A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199585A (en) * | 2018-01-15 | 2018-06-22 | 深圳市三行技术有限公司 | A kind of driving power circuit |
| CN110277911A (en) * | 2018-03-15 | 2019-09-24 | 深圳市三诺数字科技有限公司 | Power supply circuit and sound equipment applied to sound equipment |
| CN113741605A (en) * | 2021-08-05 | 2021-12-03 | 大族激光科技产业集团股份有限公司 | Linear voltage-stabilized power supply |
-
2016
- 2016-08-02 CN CN201610626199.8A patent/CN106253705A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199585A (en) * | 2018-01-15 | 2018-06-22 | 深圳市三行技术有限公司 | A kind of driving power circuit |
| CN110277911A (en) * | 2018-03-15 | 2019-09-24 | 深圳市三诺数字科技有限公司 | Power supply circuit and sound equipment applied to sound equipment |
| CN113741605A (en) * | 2021-08-05 | 2021-12-03 | 大族激光科技产业集团股份有限公司 | Linear voltage-stabilized power supply |
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