CN104467483A - Switching voltage-stabilized power supply based on multi-stage power amplification balanced modulation circuit - Google Patents
Switching voltage-stabilized power supply based on multi-stage power amplification balanced modulation circuit Download PDFInfo
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- CN104467483A CN104467483A CN201410706021.5A CN201410706021A CN104467483A CN 104467483 A CN104467483 A CN 104467483A CN 201410706021 A CN201410706021 A CN 201410706021A CN 104467483 A CN104467483 A CN 104467483A
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—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 having several active switching elements
Abstract
The invention discloses a switching voltage-stabilized power supply based on a multi-stage power amplification balanced modulation circuit. The switching voltage-stabilized power supply is mainly composed of a diode rectifier U, a power amplifier P1, a voltage comparator U2, a transformer T, a balanced adjustment circuit, a switching filter circuit and the like, wherein the balanced adjustment circuit is connected between the diode rectifier U and the voltage comparator U2 in series, the switching filter circuit is connected between the balanced adjustment circuit and the power amplifier P1 in series. The switching voltage-stabilized power supply is characterized in that a logic protection amplifying circuit is further connected between the Q end of the voltage comparator U2 and the negative electrode input end of the power amplifier P1 in series. According to the switching voltage-stabilized power supply based on the multi-stage power amplification balanced modulation circuit, the switching control circuit is composed of field-effect transistors, so that the switching voltage-stabilized power supply has a boosting mode and a voltage reducing mode, a full-voltage-range output current is controlled to be within +/- 0.1%, and compared with a traditional switching voltage-stabilized power supply, the output current change control precision is greatly improved.
Description
Technical field
The present invention relates to a kind of switching power supply, specifically refer to a kind of switching power supply based on multiple power levels amplification balance modulation circuit.
Background technology
Along with continuous progress scientific and technological at present, electronic product also brings great convenience to people are in life while function from strength to strength.Voltage stabilizing circuit is just runed and gives birth to, and traditional series connection linear regulator type voltage stabilizing circuit has the features such as stability is high, output voltage is adjustable, ripple coefficient is little, circuit is simple.But the Correctional tube of these series connection linear regulator type voltage stabilizing circuits is always operating at magnifying state, and have electric current to flow through, therefore the power consumption of its pipe is comparatively large, the efficiency of circuit is not high, generally can only reach about 30% ~ 50% always.In order to overcome above-mentioned defect, people just have developed switching mode voltage stabilizing circuit.
In switching mode voltage stabilizing circuit, surge pipe is operated on off state, pipe alternation saturated with cut-off two states in.When pipe saturation conduction, though it is large to flow through pipe current, but tube voltage drop is very little; When pipe ends, tube voltage drop is large, but the electric current flow through is close to zero.Therefore, under power output the same terms, the efficiency of switching mode voltage stabilizer coin series regulator is high, generally can reach about 80% ~ 90%.But it is comparatively large that the switching mode voltage stabilizer that current people adopt but exists ripple coefficient, when Correctional tube constantly switches between saturated and cut-off state, radio frequency interference can be produced to circuit, circuit more complicated and cost is higher.
Summary of the invention
The object of the invention is to the defect that ripple coefficient is comparatively large, radio frequency interference is serious, circuit is complicated and efficiency is not high overcoming the existence of current switching mode voltage stabilizer, a kind of switching power supply based on multiple power levels amplification balance modulation circuit is provided.
Object of the present invention is achieved through the following technical solutions: a kind of switching power supply based on multiple power levels amplification balance modulation circuit, primarily of diode rectifier U, power amplifier P1, voltage comparator U2, transformer T, be serially connected in the balance adjustment circuit between diode rectifier U and voltage comparator U2, be serially connected in the switched filter circuit between balance adjustment circuit and power amplifier P1, the power output circuit be connected with the secondary coil L2 of transformer T, the transformation feedback circuit be connected with the secondary coil L3 of transformer T, the ON-OFF control circuit be connected with transformation feedback circuit, the oscillator be connected with ON-OFF control circuit, the current comparator I1 be connected with ON-OFF control circuit, the current comparator I2 be connected with ON-OFF control circuit, respectively with oscillator, the slope equalizer W that current comparator I1 is connected with current comparator I2, the PWM controller be connected with current comparator I1 with power amplifier P1 respectively, and output is connected with the tap on the primary coil L1 of transformer T, and the sliding damper that input is connected with the output of power amplifier P1 forms.
Meanwhile, between the Q end and the negative input of power amplifier P1 of voltage comparator U2, virtual protection amplifying circuit is serially connected with, this virtual protection amplifying circuit is primarily of power amplifier P3, power amplifier P4, NAND gate IC1, NAND gate IC2, negative pole is connected with the electrode input end of power amplifier P3, the polar capacitor C7 that positive pole is connected with the negative input of NAND gate IC2 after resistance R11, one end is connected with the negative input of NAND gate IC1, the resistance R8 that the other end is connected with the electrode input end of power amplifier P3, be serially connected in the resistance R9 between the negative input of power amplifier P3 and output, one end is connected with the output of NAND gate IC1, the resistance R10 that the other end is connected with the negative input of power amplifier P4, be serially connected in the polar capacitor C8 between the electrode input end of power amplifier P4 and output, positive pole is connected with the output of NAND gate IC2, negative pole is in turn through electric capacity C9 that voltage stabilizing didoe D4 is connected with the output of power amplifier P3 after resistance R12, P pole is connected with the output of power amplifier P4, N pole is in turn through diode D5 that resistance R14 is connected with the tie point of resistance R12 with voltage stabilizing didoe D4 after resistance R13, and N pole is connected with the negative pole of electric capacity C9, the voltage stabilizing didoe D6 that P pole is connected with the tie point of resistance R14 with diode D5 forms, the electrode input end of described NAND gate IC1 is connected with the negative input of power amplifier P3, the electrode input end of the output NAND gate IC2 of power amplifier P4 is connected, and its electrode input end is then connected with the output of power amplifier P3, the positive pole of described polar capacitor C7 is held with the Q of voltage comparator U2 and is connected, and resistance R14 is connected with the negative input of power amplifier P1 with the tie point of resistance R13.
Further, described balance adjustment circuit is by field effect transistor MOS1, field effect transistor MOS2, field effect transistor MOS3, field effect transistor MOS4, the resistance R4 that one end is connected with the grid of field effect transistor MOS1, the other end is connected with the grid of field effect transistor MOS2 after resistance R5, and the resistance R6 that one end is connected with the grid of field effect transistor MOS3, the other end is connected with the grid of field effect transistor MOS4 after resistance R7 forms; The source electrode of described field effect transistor MOS1 is held with the S of voltage comparator U2 and is connected, and its drain electrode is then connected with switched filter circuit; The source electrode of described field effect transistor MOS2 is connected with the cathode output end of diode rectifier U, it drains and to be connected with the drain electrode of effect pipe MOS1; The source electrode of field effect transistor MOS3 is held with the R of voltage comparator U2 and is connected, its grounded drain; The source electrode of field effect transistor MOS4 is connected with the cathode output end of diode rectifier U, its grounded drain.
Described switched filter circuit is by triode Q, and electric capacity C1, electric capacity C2, resistance R1, resistance R2 and diode D1 form; The base stage of described triode Q forms loop with its collector electrode in turn after resistance R2, diode D1 and resistance R1, and electric capacity C1 and resistance R1 is in parallel, and electric capacity C2 and resistance R2 is in parallel; The collector electrode of triode Q is connected with the drain electrode of field effect transistor MOS2, its grounded emitter; Resistance R2 is then connected with the electrode input end of power amplifier P1 with the tie point of diode D1; The primary coil L1 of transformer T is then in parallel with diode D1.
The diode D2 that described power output circuit is connected with the Same Name of Ends of secondary coil L2 by P pole, N pole is connected with the non-same polarity of secondary coil L2 after electric capacity C3, and the inductance L 4 that one end is connected with the N pole of diode D2, the other end is connected with the non-same polarity of secondary coil L2 after electric capacity C4 forms.
Described transformation feedback circuit is made up of diode D3 and electric capacity C5; The P pole of described diode D3 is connected with the non-same polarity of secondary coil L3, its N pole is connected with the Same Name of Ends of secondary coil L3 after electric capacity C5, the Same Name of Ends ground connection of described secondary coil L3.
Described ON-OFF control circuit is made up of field effect transistor MOS5, power amplifier P2, voltage comparator U1, inductance L 5 and resistance R3; Described inductance L 5 is serially connected between the output of power amplifier P1 and the N pole of diode D3, and the drain electrode of field effect transistor MOS5 is connected with the N pole of diode D3, its source electrode ground connection, its grid after resistance R3 are then connected with the output of power amplifier P2; The S end of voltage comparator U1 is connected with the output of oscillator, and its R end is connected with the output of current comparator I1, and its Q end is then connected with the negative input of power amplifier P2; The electrode input end of power amplifier P2 is connected with the drain electrode of field effect transistor MOS5; The electrode input end of current comparator I2 is then connected with the two ends of resistance R3 with negative input, and its output is connected with the input of oscillator with the negative input of current comparator I1 respectively after slope equalizer W; The electrode input end of current comparator I1 is then connected with the output of power amplifier P1; An output of PWM controller is connected with the negative input of power amplifier P1 with the negative input of current comparator I1 respectively, its another output ground connection after electric capacity C6.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention make use of the controlling functions of PWM fully, can automatically regulate electric power output voltage value according to duty ratio, guarantees the stable of output valve.
(2) initiative of the present invention by equilibrium modulation circuit, slope equalizer and voltage, current comparator use in a power, not only effectively reduce circuit self and external radio frequency interference, but also greatly simplify circuit structure, cost of manufacture and maintenance cost are had reduction by a relatively large margin.
(3) the present invention utilizes field effect transistor to form ON-OFF control circuit, the present invention is not only made to have possessed boost mode and decompression mode, but also making the change of full voltage range output current control between ± 0.1%, the output current change control range of more traditional switching power supply is greatly improved.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is virtual protection amplification circuit structure schematic diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, the present invention primarily of diode rectifier U, power amplifier P1; voltage comparator U2, transformer T, balance adjustment circuit; switched filter circuit, power output circuit, transformation feedback circuit; ON-OFF control circuit, oscillator, current comparator I1; current comparator I2; slope equalizer W, PWM controller, sliding damper and virtual protection amplifying circuit composition.
Wherein, transformer T is by the primary coil L1 being arranged on former limit, and the secondary coil L2 and the secondary coil L3 that are arranged on secondary form.The present invention is provided with a sliding tap on the primary coil L1 of transformer T, this sliding tap is then controlled by sliding damper, to guarantee to adjust turn ratio between the primary coil L1 of transformer T and secondary coil L2 and secondary coil L3 according to the duty ratio of PWM controller and the common results of ON-OFF control circuit.
Described balance adjustment circuit is by field effect transistor MOS1, field effect transistor MOS2, field effect transistor MOS3, field effect transistor MOS4, the resistance R4 that one end is connected with the grid of field effect transistor MOS1, the other end is connected with the grid of field effect transistor MOS2 after resistance R5, and the resistance R6 that one end is connected with the grid of field effect transistor MOS3, the other end is connected with the grid of field effect transistor MOS4 after resistance R7 forms.
Voltage comparator U2 has three ports, i.e. S end, R end and Q end.During connection, the source electrode of field effect transistor MOS1 is held with the S of voltage comparator U2 and is connected, its drain electrode is then connected with switched filter circuit, and the source electrode of field effect transistor MOS2 is connected with the cathode output end of diode rectifier U on the contrary, it drains and to be connected with the drain electrode of effect pipe MOS1; The source electrode of field effect transistor MOS3 is held with the R of voltage comparator U2 and is connected, its grounded drain; The source electrode of field effect transistor MOS4 is connected with the cathode output end of diode rectifier U, its grounded drain.The input of diode rectifier U is then for the civil power of external 220V.
Described switched filter circuit is by triode Q, and electric capacity C1, electric capacity C2, resistance R1, resistance R2 and diode D1 form.Wherein, the base stage of triode Q forms loop with its collector electrode in turn after resistance R2, diode D1 and resistance R1.Electric capacity C1 and resistance R1 is in parallel, and electric capacity C2 and resistance R2 is in parallel, to form typical RL filter circuit.Meanwhile, the collector electrode of triode Q is also connected with the drain electrode of field effect transistor MOS2, its grounded emitter.Resistance R2 is then connected with the electrode input end of power amplifier P1 with the tie point of diode D1, and primary coil L1 and the diode D1 of described transformer T are in parallel.
In this switched filter circuit, resistance R1, electric capacity C1 and diode D1 form feedback-clamp circuit, can improve the peak-inverse voltage of conversion efficiency and reduction power amplifier P1 electrode input end.
Power output circuit is used for output dc voltage, and it is made up of diode D2, electric capacity C3, inductance L 4 and electric capacity C4.During connection, the P pole of diode D2 is connected with the Same Name of Ends of secondary coil L2, and its N pole is connected with the non-same polarity of secondary coil L2 after electric capacity C3.One end of described inductance L 4 is connected with the N pole of diode D2, the other end is connected with the non-same polarity of secondary coil L2 after electric capacity C4.
Transformation feedback circuit is used for providing feedback operation voltage, to guarantee that ON-OFF control circuit can control sliding damper according to feedback voltage for ON-OFF control circuit.This transformation feedback circuit is then made up of diode D3 and electric capacity C5.During connection, the P pole of described diode D3 is connected with the non-same polarity of secondary coil L3, its N pole is connected with the Same Name of Ends of secondary coil L3 after electric capacity C5, the Same Name of Ends ground connection of described secondary coil L3.
ON-OFF control circuit is switching control section of the present invention, and it is made up of field effect transistor MOS5, power amplifier P2, voltage comparator U1, inductance L 5 and resistance R3.As shown in the figure, this inductance L 5 is serially connected between the output of power amplifier P1 and the N pole of diode D3, and the drain electrode of field effect transistor MOS5 is connected with the N pole of diode D3, its source electrode ground connection, its grid after resistance R3 are then connected with the output of power amplifier P2.
The S end of voltage comparator U1 is connected with the output of oscillator, and its R end is connected with the output of current comparator I1, and its Q end is then connected with the negative input of power amplifier P2.The electrode input end of power amplifier P2 is then connected with the drain electrode of field effect transistor MOS5.The electrode input end of current comparator I2 is then connected with the two ends of resistance R3 with negative input, during to guarantee field effect transistor MOS4 conducting, can collect operating voltage from resistance R3 two ends.Meanwhile, the output of this current comparator I2 is connected with the input of oscillator with the negative input of current comparator I1 respectively after slope equalizer W.
The electrode input end of current comparator I1 is then connected with the non-same polarity of primary coil L1 with the output of power amplifier P1; An output of PWM controller is connected with the negative input of power amplifier P1 with the negative input of current comparator I1 respectively, its another output ground connection after electric capacity C6.
During use, the voltage acting on diode rectifier U after balancing circuitry carries out Balance Treatment and switched filter circuit carries out filtering for the primary coil L1 of transformer T and power amplifier P1 provides operating voltage.When inductance coil L5 senses that external loading changes, when its induction reactance just changes, now power amplifier P2 impels field effect transistor MOS conducting under the acting in conjunction of voltage comparator U1 and inductance L 5, the pulse signal that PWM controller provides acts on power amplifier P1 and current comparator I1 after current comparator I1, sliding damper is obtained electric, and automatically regulate sliding tap according to the situation of change of load, thus change the primary coil L1 of transformer T and the turn ratio between secondary coil L2 and secondary coil L3, final realization is to the stable power-supplying function of load.
For guaranteeing result of use, in this balance adjustment circuit, the tie point of resistance R4 and resistance R5 needs the operating voltage V1 of external+6V, and in like manner, the tie point of resistance R6 and resistance R7 also needs the operating voltage V2 of external+6V.
The structure of described virtual protection amplifying circuit as shown in Figure 2, this virtual protection amplifying circuit is primarily of power amplifier P3, power amplifier P4, NAND gate IC1, NAND gate IC2, negative pole is connected with the electrode input end of power amplifier P3, the polar capacitor C7 that positive pole is connected with the negative input of NAND gate IC2 after resistance R11, one end is connected with the negative input of NAND gate IC1, the resistance R8 that the other end is connected with the electrode input end of power amplifier P3, be serially connected in the resistance R9 between the negative input of power amplifier P3 and output, one end is connected with the output of NAND gate IC1, the resistance R10 that the other end is connected with the negative input of power amplifier P4, be serially connected in the polar capacitor C8 between the electrode input end of power amplifier P4 and output, positive pole is connected with the output of NAND gate IC2, negative pole is in turn through electric capacity C9 that voltage stabilizing didoe D4 is connected with the output of power amplifier P3 after resistance R12, P pole is connected with the output of power amplifier P4, N pole is in turn through diode D5 that resistance R14 is connected with the tie point of resistance R12 with voltage stabilizing didoe D4 after resistance R13, and N pole is connected with the negative pole of electric capacity C9, the voltage stabilizing didoe D6 that P pole is connected with the tie point of resistance R14 with diode D5 forms.
Meanwhile, the electrode input end of described NAND gate IC1 is connected with the negative input of power amplifier P3; The electrode input end of the output NAND gate IC2 of power amplifier P4 is connected, and its electrode input end is then connected with the output of power amplifier P3.
The positive pole of described polar capacitor C7 is held with the Q of voltage comparator U2 and is connected, and resistance R14 is connected with the negative input of power amplifier P1 with the tie point of resistance R13.
As mentioned above, just the present invention can well be realized.
Claims (6)
1. the switching power supply based on multiple power levels amplification balance modulation circuit, primarily of diode rectifier U, power amplifier P1, voltage comparator U2, transformer T, be serially connected in the balance adjustment circuit between diode rectifier U and voltage comparator U2, be serially connected in the switched filter circuit between balance adjustment circuit and power amplifier P1, the power output circuit be connected with the secondary coil L2 of transformer T, the transformation feedback circuit be connected with the secondary coil L3 of transformer T, the ON-OFF control circuit be connected with transformation feedback circuit, the oscillator be connected with ON-OFF control circuit, the current comparator I1 be connected with ON-OFF control circuit, the current comparator I2 be connected with ON-OFF control circuit, respectively with oscillator, the slope equalizer W that current comparator I1 is connected with current comparator I2, the PWM controller be connected with current comparator I1 with power amplifier P1 respectively, and output is connected with the tap on the primary coil L1 of transformer T, and the sliding damper that input is connected with the output of power amplifier P1 forms, it is characterized in that, virtual protection amplifying circuit is serially connected with between the Q end and the negative input of power amplifier P1 of voltage comparator U2, this virtual protection amplifying circuit is primarily of power amplifier P3, power amplifier P4, NAND gate IC1, NAND gate IC2, negative pole is connected with the electrode input end of power amplifier P3, the polar capacitor C7 that positive pole is connected with the negative input of NAND gate IC2 after resistance R11, one end is connected with the negative input of NAND gate IC1, the resistance R8 that the other end is connected with the electrode input end of power amplifier P3, be serially connected in the resistance R9 between the negative input of power amplifier P3 and output, one end is connected with the output of NAND gate IC1, the resistance R10 that the other end is connected with the negative input of power amplifier P4, be serially connected in the polar capacitor C8 between the electrode input end of power amplifier P4 and output, positive pole is connected with the output of NAND gate IC2, negative pole is in turn through electric capacity C9 that voltage stabilizing didoe D4 is connected with the output of power amplifier P3 after resistance R12, P pole is connected with the output of power amplifier P4, N pole is in turn through diode D5 that resistance R14 is connected with the tie point of resistance R12 with voltage stabilizing didoe D4 after resistance R13, and N pole is connected with the negative pole of electric capacity C9, the voltage stabilizing didoe D6 that P pole is connected with the tie point of resistance R14 with diode D5 forms, the electrode input end of described NAND gate IC1 is connected with the negative input of power amplifier P3, the electrode input end of the output NAND gate IC2 of power amplifier P4 is connected, and its electrode input end is then connected with the output of power amplifier P3, the positive pole of described polar capacitor C7 is held with the Q of voltage comparator U2 and is connected, and resistance R14 is connected with the negative input of power amplifier P1 with the tie point of resistance R13.
2. a kind of switching power supply based on multiple power levels amplification balance modulation circuit according to claim 1, it is characterized in that, described balance adjustment circuit is by field effect transistor MOS1, field effect transistor MOS2, field effect transistor MOS3, field effect transistor MOS4, the resistance R4 that one end is connected with the grid of field effect transistor MOS1, the other end is connected with the grid of field effect transistor MOS2 after resistance R5, and the resistance R6 that one end is connected with the grid of field effect transistor MOS3, the other end is connected with the grid of field effect transistor MOS4 after resistance R7 forms; The source electrode of described field effect transistor MOS1 is held with the S of voltage comparator U2 and is connected, and its drain electrode is then connected with switched filter circuit; The source electrode of described field effect transistor MOS2 is connected with the cathode output end of diode rectifier U, it drains and to be connected with the drain electrode of effect pipe MOS1; The source electrode of field effect transistor MOS3 is held with the R of voltage comparator U2 and is connected, its grounded drain; The source electrode of field effect transistor MOS4 is connected with the cathode output end of diode rectifier U, its grounded drain.
3. a kind of switching power supply based on multiple power levels amplification balance modulation circuit according to claim 2, is characterized in that, described switched filter circuit is by triode Q, and electric capacity C1, electric capacity C2, resistance R1, resistance R2 and diode D1 form; The base stage of described triode Q forms loop with its collector electrode in turn after resistance R2, diode D1 and resistance R1, and electric capacity C1 and resistance R1 is in parallel, and electric capacity C2 and resistance R2 is in parallel; The collector electrode of triode Q is connected with the drain electrode of field effect transistor MOS2, its grounded emitter; Resistance R2 is then connected with the electrode input end of power amplifier P1 with the tie point of diode D1; The primary coil L1 of transformer T is then in parallel with diode D1.
4. a kind of switching power supply based on multiple power levels amplification balance modulation circuit according to claim 3, it is characterized in that, the diode D2 that described power output circuit is connected with the Same Name of Ends of secondary coil L2 by P pole, N pole is connected with the non-same polarity of secondary coil L2 after electric capacity C3, and the inductance L 4 that one end is connected with the N pole of diode D2, the other end is connected with the non-same polarity of secondary coil L2 after electric capacity C4 forms.
5. a kind of switching power supply based on multiple power levels amplification balance modulation circuit according to claim 4, is characterized in that, described transformation feedback circuit is made up of diode D3 and electric capacity C5; The P pole of described diode D3 is connected with the non-same polarity of secondary coil L3, its N pole is connected with the Same Name of Ends of secondary coil L3 after electric capacity C5, the Same Name of Ends ground connection of described secondary coil L3.
6. a kind of switching power supply based on multiple power levels amplification balance modulation circuit according to claim 5, is characterized in that, described ON-OFF control circuit is made up of field effect transistor MOS5, power amplifier P2, voltage comparator U1, inductance L 5 and resistance R3; Described inductance L 5 is serially connected between the output of power amplifier P1 and the N pole of diode D3, and the drain electrode of field effect transistor MOS5 is connected with the N pole of diode D3, its source electrode ground connection, its grid after resistance R3 are then connected with the output of power amplifier P2; The S end of voltage comparator U1 is connected with the output of oscillator, and its R end is connected with the output of current comparator I1, and its Q end is then connected with the negative input of power amplifier P2; The electrode input end of power amplifier P2 is connected with the drain electrode of field effect transistor MOS5; The electrode input end of current comparator I2 is then connected with the two ends of resistance R3 with negative input, and its output is connected with the input of oscillator with the negative input of current comparator I1 respectively after slope equalizer W; The electrode input end of current comparator I1 is then connected with the output of power amplifier P1; An output of PWM controller is connected with the negative input of power amplifier P1 with the negative input of current comparator I1 respectively, its another output ground connection after electric capacity C6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410706021.5A CN104467483A (en) | 2014-11-27 | 2014-11-27 | Switching voltage-stabilized power supply based on multi-stage power amplification balanced modulation circuit |
| CN201510310246.3A CN104901565A (en) | 2014-11-27 | 2015-06-09 | Multistage-power-amplification-balanced-modulation-circuit-base mixing protection type switching voltage-stabilized power supply |
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| CN201410706021.5A CN104467483A (en) | 2014-11-27 | 2014-11-27 | Switching voltage-stabilized power supply based on multi-stage power amplification balanced modulation circuit |
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| CN201510310246.3A Pending CN104901565A (en) | 2014-11-27 | 2015-06-09 | Multistage-power-amplification-balanced-modulation-circuit-base mixing protection type switching voltage-stabilized power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104901565A (en) * | 2014-11-27 | 2015-09-09 | 成都雷克尔科技有限公司 | Multistage-power-amplification-balanced-modulation-circuit-base mixing protection type switching voltage-stabilized power supply |
| CN104935189A (en) * | 2014-11-27 | 2015-09-23 | 成都雷克尔科技有限公司 | Combined protection type mixed triggering power source based on logic protection amplifying circuit |
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| CN104391164A (en) * | 2014-11-18 | 2015-03-04 | 成都措普科技有限公司 | High-precision mains supply monitoring system |
| CN104506056A (en) * | 2014-11-22 | 2015-04-08 | 成都智利达科技有限公司 | Switching voltage-stabilizing power supply based on balanced modulation circuit |
| CN104467478A (en) * | 2014-11-25 | 2015-03-25 | 成都思茂科技有限公司 | Novel balanced modulation type multiplexed output voltage-stabilized source |
| CN204349824U (en) * | 2014-11-27 | 2015-05-20 | 成都措普科技有限公司 | A kind of switching power supply based on multiple power levels amplification balance modulation circuit |
| CN104467483A (en) * | 2014-11-27 | 2015-03-25 | 成都措普科技有限公司 | Switching voltage-stabilized power supply based on multi-stage power amplification balanced modulation circuit |
-
2014
- 2014-11-27 CN CN201410706021.5A patent/CN104467483A/en active Pending
-
2015
- 2015-06-09 CN CN201510310246.3A patent/CN104901565A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901565A (en) * | 2014-11-27 | 2015-09-09 | 成都雷克尔科技有限公司 | Multistage-power-amplification-balanced-modulation-circuit-base mixing protection type switching voltage-stabilized power supply |
| CN104935189A (en) * | 2014-11-27 | 2015-09-23 | 成都雷克尔科技有限公司 | Combined protection type mixed triggering power source based on logic protection amplifying circuit |
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| Publication number | Publication date |
|---|---|
| CN104901565A (en) | 2015-09-09 |
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