CN105656292A - Circuit capable of realizing slight regulation of PFC voltage along with output voltage - Google Patents
Circuit capable of realizing slight regulation of PFC voltage along with output voltage Download PDFInfo
- Publication number
- CN105656292A CN105656292A CN201610170737.7A CN201610170737A CN105656292A CN 105656292 A CN105656292 A CN 105656292A CN 201610170737 A CN201610170737 A CN 201610170737A CN 105656292 A CN105656292 A CN 105656292A
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- resistance
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- pressure regulation
- voltage
- output voltage
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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
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a circuit capable of realizing slight regulation of PFC voltage along with output voltage. The circuit comprises a voltage regulating signal processing circuit and a voltage regulating signal isolation driving circuit. After an external voltage regulating command is obtained, the voltage regulating signal processing circuit processes an external signal, the processed external signal is divided into two signals, one signal is transmitted to an output voltage feedback circuit to make the output voltage reach a preset value, the other signal is transmitted to the voltage regulating signal isolation driving circuit, a secondary voltage regulating signal is transmitted to a primary PFC voltage control circuit through the voltage regulating signal isolation driving circuit, and slight regulation of the PFC voltage along with the output voltage is realized. The circuit enables the adjustable application range of the output voltage of a power source to be wider, the problem that the performance of the power source is reduced when the output voltage range is adjusted to deviate from the optimal working point is solved, and due to improvement in the performance, cost increases caused by adding heat dissipation measures, using high-performance devices and the like can be reduced, material cost is saved, required performance indexes can be achieved more easily, debugging difficulty is lowered, and the development cycle of the power source is shortened.
Description
Technical field
The present invention relates to the circuit of switch power supply PFC voltage follow output voltage fine setting.
Background technology
At present, all need under many circumstances requirement power supply output voltage can adjustment on a large scale, and require in output voltage regulation range, ensure every performance index.
The PFC voltage of general switch power supply is fixing, by the restriction of the transformer turn ratio, a transformer often can only be suitable for a very little output voltage range, surpass and go beyond the scope, the performance of power supply will there will be obvious decline, the scope exceeded is more big, degradation is more obvious, such as degradation in efficiency, device temperature increases, output ripple increase etc., for addressing these problems, often need to increase heat dissipation design, increase filtering circuit, use the measures such as high performance device, device cost is caused to increase, power supply debugging difficulty is big and the construction cycle is long, the actual variable range of power supply is restricted, such as Fig. 1, shown in Fig. 2.
Summary of the invention
In order to overcome above-mentioned technological deficiency, the present invention provides the circuit that a kind of PFC voltage follow output voltage finely tunes, the circuit of this PFC voltage follow output voltage fine setting can improve the output voltage variable range of power supply, improve performance when output voltage is adjusted to off-target working point, Material Cost can be saved, reduce the construction cycle.
The technical solution adopted for the present invention to solve the technical problems as follows described in: a kind of PFC voltage follow output voltage fine setting circuit, it is characterised in that, comprise pressure regulation signal treatment circuit and pressure regulation signal isolated drive circuit,
After obtaining outside pressure regulation order, outside signal is processed by pressure regulation signal treatment circuit, is divided into two paths of signals after process, and a road signal, to output voltage reaction circuit, makes output voltage reach preset value; Another road signal to pressure regulation signal isolated drive circuit, by this circuit secondary pressure regulation signal transmission to elementary PFC voltage control circuit, it is achieved PFC voltage follow output voltage finely tune.
According to above-mentioned the present invention, wherein said pressure regulation signal treatment circuit is MCU or discrete device.
According to above-mentioned the present invention, wherein said pressure regulation signal isolated drive circuit is optocoupler or drives transformer.
According to above-mentioned the present invention, wherein PFC input terminus is successively through the first resistance R1, 2nd resistance R2, 3rd resistance R3 is connected with the 4th resistance R4, described 4th resistance R4 is through the 5th resistance R5 ground connection, described 5th resistance R5 is in parallel with the 6th resistance R6 and the first electric capacity C1 respectively, described 4th resistance R4 also connects PFC and controls chip and described pressure regulation signal-isolated transmission circuit, the described pressure regulation signal-isolated transmission circuit the other end connects described pressure regulation signal treatment circuit, described pressure regulation signal treatment circuit connects the inverting input of the first comparer through the tenth resistance R10, the inverting input of described first comparer also connects the output terminal of described first comparer through the 3rd electric capacity C3 and the 8th resistance R8, the output terminal of described first comparer is also through the anode of the 7th resistance R7 and the first photodiode, the plus earth of described photodiode, the power pins of described first comparer connects power vd D, described power pins is also by the 2nd electric capacity C2 ground connection, the in-phase input end of described first comparer connects the 11 resistance R11 and the 12 resistance R12 respectively through the 9th resistance R9, described 11 resistance R11 connects voltage output end, described 12 resistance R12 is in parallel with the 13 resistance R13.
According to above-mentioned the present invention, in described pressure regulation signal-isolated transmission circuit, the two ends of the 14 resistance R14 connect the output terminal that described PFC controls chip and the 2nd voltage comparator respectively, this output terminal also connects the inverting input of described 2nd voltage comparator, the in-phase input end of described 2nd voltage comparator connects the emtting electrode of photosensitive triode through the 15 resistance R15, the collector electrode of described photosensitive triode connects 5V power supply, the base stage of described photosensitive triode is controlled by the 2nd photodiode, the anode of described 2nd photodiode connects described power vd D through the 16 resistance R16, the collector electrode of the negative electrode connecting triode of described 2nd photodiode, the grounded emitter of described triode, the base stage of described triode connects its emtting electrode through the 18 resistance R18, the base stage of described triode also connects described pressure regulation signal processing resistance through the 17 resistance R17.
The present invention according to said structure, its useful effect is:
1, the output voltage adjustable application range of power supply is bigger.
2, output voltage range is improved when being adjusted to off-target working point, the problem that power source performance reduces.
3, because of improved performance, it is possible to reduce because the cost increasing cooling measure, use high performance device etc. to bring increases, saved Material Cost.
4, because improved performance, more easily realize the performance index required, reduce debugging difficulty, shorten the construction cycle of power supply.
Accompanying drawing explanation
Fig. 1 is the schematic circuit of software adjustment output voltage in prior art;
Fig. 2 is the schematic circuit of potentiometer regulation output voltage in prior art;
Fig. 3 is circuit structure diagram of the present invention;
Fig. 4 is a kind of practical application citing of circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described further.
As shown in Figure 3, Figure 4, the circuit of a kind of PFC voltage follow output voltage fine setting, comprises pressure regulation signal treatment circuit and pressure regulation signal isolated drive circuit.
PFC input terminus is successively through the first resistance R1, 2nd resistance R2, 3rd resistance R3 is connected with the 4th resistance R4, 4th resistance R4 is through the 5th resistance R5 ground connection, 5th resistance R5 is in parallel with the 6th resistance R6 and the first electric capacity C1 respectively, 4th resistance R4 also connects PFC and controls chip and pressure regulation signal-isolated transmission circuit, the pressure regulation signal-isolated transmission circuit the other end connects pressure regulation signal treatment circuit, pressure regulation signal treatment circuit connects the inverting input of the first comparer through the tenth resistance R10, the inverting input of the first comparer also connects the output terminal of the first comparer through the 3rd electric capacity C3 and the 8th resistance R8, the output terminal of the first comparer is also through the anode of the 7th resistance R7 and the first photodiode, the plus earth of photodiode, the power pins of the first comparer connects power vd D, power pins is also by the 2nd electric capacity C2 ground connection, the in-phase input end of the first comparer connects the 11 resistance R11 and the 12 resistance R12 respectively through the 9th resistance R9, 11 resistance R11 connects voltage output end, 12 resistance R12 is in parallel with the 13 resistance R13.
In pressure regulation signal-isolated transmission circuit, the two ends of the 14 resistance R14 connect the output terminal that PFC controls chip and the 2nd voltage comparator respectively, this output terminal also connects the inverting input of the 2nd voltage comparator, the in-phase input end of the 2nd voltage comparator connects the emtting electrode of photosensitive triode through the 15 resistance R15, the collector electrode of photosensitive triode connects 5V power supply, the base stage of photosensitive triode is controlled by the 2nd photodiode, the anode of the 2nd photodiode connects power vd D through the 16 resistance R16, the collector electrode of the negative electrode connecting triode of the 2nd photodiode, the grounded emitter of triode, the base stage of triode connects its emtting electrode through the 18 resistance R18, the base stage of triode also connects pressure regulation signal processing resistance through the 17 resistance R17.
After obtaining outside pressure regulation order, outside signal is processed by pressure regulation signal treatment circuit, is divided into two paths of signals after process, and a road signal, to output voltage reaction circuit, makes output voltage reach preset value; Another road signal to pressure regulation signal isolated drive circuit, by this circuit secondary pressure regulation signal transmission to elementary PFC voltage control circuit, it is achieved PFC voltage follow output voltage finely tune.
In this example, pressure regulation signal treatment circuit has various ways, it is possible to realize with MCU, it is also possible to realize with discrete device. Pressure regulation signal-isolated transmission circuit can also can transmit by driving transformer isolation with light-coupled isolation transmission.
Invention increases the output voltage variable range of power supply, improve performance when output voltage is adjusted to off-target working point, saved Material Cost, decreased the construction cycle.
Should be understood that, for those of ordinary skills, it is possible to improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Above in conjunction with accompanying drawing, patent of the present invention is carried out exemplary description; the realization of obvious patent of the present invention is not subject to the restrictions described above; as long as have employed the various improvement that the design of the method for patent of the present invention carries out with technical scheme; or without improving, the design of patent of the present invention and technical scheme directly applied to other occasion, all in protection scope of the present invention.
Claims (7)
1. the circuit of a PFC voltage follow output voltage fine setting, it is characterised in that, comprise pressure regulation signal treatment circuit and pressure regulation signal-isolated transmission circuit,
After obtaining outside pressure regulation order, outside signal is processed by pressure regulation signal treatment circuit, is divided into two paths of signals after process, and a road signal, to output voltage reaction circuit, makes output voltage reach preset value;Another road signal to pressure regulation signal-isolated transmission circuit, by this circuit secondary pressure regulation signal transmission to elementary PFC voltage control circuit, it is achieved PFC voltage follow output voltage finely tune.
2. the circuit of a kind of PFC voltage follow output voltage according to claim 1 fine setting, it is characterised in that, described pressure regulation signal treatment circuit is MCU.
3. the circuit of a kind of PFC voltage follow output voltage according to claim 1 fine setting, it is characterised in that, described pressure regulation signal treatment circuit is discrete device.
4. the circuit of a kind of PFC voltage follow output voltage according to claim 1 fine setting, it is characterised in that, described pressure regulation signal-isolated transmission circuit is optocoupler.
5. the circuit of a kind of PFC voltage follow output voltage according to claim 1 fine setting, it is characterised in that, described pressure regulation signal-isolated transmission circuit is for driving transformer.
6. the circuit of a kind of PFC voltage follow output voltage according to claim 1 fine setting, it is characterized in that, PFC input terminus is successively through the first resistance R1, 2nd resistance R2, 3rd resistance R3 is connected with the 4th resistance R4, described 4th resistance R4 is through the 5th resistance R5 ground connection, described 5th resistance R5 is in parallel with the 6th resistance R6 and the first electric capacity C1 respectively, described 4th resistance R4 also connects PFC and controls chip and described pressure regulation signal-isolated transmission circuit, the described pressure regulation signal-isolated transmission circuit the other end connects described pressure regulation signal treatment circuit, described pressure regulation signal treatment circuit connects the inverting input of the first comparer through the tenth resistance R10, the inverting input of described first comparer also connects the output terminal of described first comparer through the 3rd electric capacity C3 and the 8th resistance R8, the output terminal of described first comparer is also through the anode of the 7th resistance R7 and the first photodiode, the plus earth of described photodiode, the power pins of described first comparer connects power vd D, described power pins is also by the 2nd electric capacity C2 ground connection, the in-phase input end of described first comparer connects the 11 resistance R11 and the 12 resistance R12 respectively through the 9th resistance R9, described 11 resistance R11 connects voltage output end, described 12 resistance R12 is in parallel with the 13 resistance R13.
7. the circuit of a kind of PFC voltage follow output voltage according to claim 6 fine setting, it is characterized in that, in described pressure regulation signal-isolated transmission circuit, the two ends of the 14 resistance R14 connect the output terminal that described PFC controls chip and the 2nd voltage comparator respectively, this output terminal also connects the inverting input of described 2nd voltage comparator, the in-phase input end of described 2nd voltage comparator connects the emtting electrode of photosensitive triode through the 15 resistance R15, the collector electrode of described photosensitive triode connects 5V power supply, the base stage of described photosensitive triode is controlled by the 2nd photodiode, the anode of described 2nd photodiode connects described power vd D through the 16 resistance R16, the collector electrode of the negative electrode connecting triode of described 2nd photodiode, the grounded emitter of described triode, the base stage of described triode connects its emtting electrode through the 18 resistance R18, the base stage of described triode also connects described pressure regulation signal processing resistance through the 17 resistance R17.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610170737.7A CN105656292B (en) | 2016-03-24 | 2016-03-24 | A kind of circuit of PFC voltage follows output voltage fine setting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610170737.7A CN105656292B (en) | 2016-03-24 | 2016-03-24 | A kind of circuit of PFC voltage follows output voltage fine setting |
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| CN105656292A true CN105656292A (en) | 2016-06-08 |
| CN105656292B CN105656292B (en) | 2018-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610170737.7A Active CN105656292B (en) | 2016-03-24 | 2016-03-24 | A kind of circuit of PFC voltage follows output voltage fine setting |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2596657Y (en) * | 2002-12-31 | 2003-12-31 | 上海新源变频电器股份有限公司 | Variable central air conditioner power factor correcting circuit device |
| CN2713725Y (en) * | 2004-05-28 | 2005-07-27 | 上海新源变频电器股份有限公司 | Frequency conversion air-conditioner single tube total control bridge power coefficient corrector |
| CN1890865A (en) * | 2003-12-15 | 2007-01-03 | 崇贸科技股份有限公司 | Apparatus for reducing the power consumption of a PFC-PWM power converter |
| CN201422183Y (en) * | 2009-05-26 | 2010-03-10 | 郑州光华灯具有限公司 | High-power LED lamp drive device |
| CN202475284U (en) * | 2012-02-29 | 2012-10-03 | 珠海市绿色照明科技有限公司 | Low-power high-power factor power supply |
| CN202565520U (en) * | 2012-03-14 | 2012-11-28 | 深圳市海骏电子科技有限公司 | LED dimming driver and LED light source system |
-
2016
- 2016-03-24 CN CN201610170737.7A patent/CN105656292B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2596657Y (en) * | 2002-12-31 | 2003-12-31 | 上海新源变频电器股份有限公司 | Variable central air conditioner power factor correcting circuit device |
| CN1890865A (en) * | 2003-12-15 | 2007-01-03 | 崇贸科技股份有限公司 | Apparatus for reducing the power consumption of a PFC-PWM power converter |
| CN2713725Y (en) * | 2004-05-28 | 2005-07-27 | 上海新源变频电器股份有限公司 | Frequency conversion air-conditioner single tube total control bridge power coefficient corrector |
| CN201422183Y (en) * | 2009-05-26 | 2010-03-10 | 郑州光华灯具有限公司 | High-power LED lamp drive device |
| CN202475284U (en) * | 2012-02-29 | 2012-10-03 | 珠海市绿色照明科技有限公司 | Low-power high-power factor power supply |
| CN202565520U (en) * | 2012-03-14 | 2012-11-28 | 深圳市海骏电子科技有限公司 | LED dimming driver and LED light source system |
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| CN105656292B (en) | 2018-05-04 |
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Address after: 518000 Shenzhen City, Shenzhen, Guangdong, Nanshan District Taoyuan street, No. 1268, honghualing industrial North District, 1, 2 4 floors, West, 5, 6. Applicant after: Shenzhen holdluck-zyt supply technology Limited by Share Ltd Address before: 518000 Shenzhen City, Shenzhen, Guangdong, Nanshan District Taoyuan street, No. 1268, honghualing industrial North District, 1, 2 4 floors, West, 5, 6. Applicant before: ShenZhen VAPEL Power Supply Technology Co., Ltd. |
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Address after: 518116 Shenzhen, Longgang, Guangdong Longgang District, Baolong Industrial Zone, Longgang Road, three road 4, A Building 1, 2 floor B building 3, 4 floor C building 3, 4 Building D Applicant after: Shenzhen holdluck-zyt supply technology Limited by Share Ltd Address before: 518000 Shenzhen City, Shenzhen, Guangdong, Nanshan District Taoyuan street, No. 1268, honghualing industrial North District, 1, 2 4 floors, West, 5, 6. Applicant before: Shenzhen holdluck-zyt supply technology Limited by Share Ltd |
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