CN203872058U - DC power supply conversion circuit - Google Patents
DC power supply conversion circuit Download PDFInfo
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- CN203872058U CN203872058U CN201420136585.5U CN201420136585U CN203872058U CN 203872058 U CN203872058 U CN 203872058U CN 201420136585 U CN201420136585 U CN 201420136585U CN 203872058 U CN203872058 U CN 203872058U
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- diode
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
A DC power supply conversion circuit comprises the following elements: diode D1-D7; heteropolarity capacitors C1 and C3; capacitors C2, C4, C5 and C6; resistors R1-R7; inductors T1-2; a transformer T1; a switch MOS pipe Q1; an integrated chip ICSY5011. The DC power supply conversion circuit can improve output voltage and current synchronization property, improves input power factors, and reduces input harmonic waves; the DC power supply conversion circuit can be used to drive an LED light source so as to improve power grid utilization rate and reduce power grid interferences, thereby ensuring normal usage of other electric appliances.
Description
Technical field
The utility model relates to a kind of electronic circuit technology field, particularly relates to a kind of direct-current power supply converting circuit.
Background technology
Direct-current power supply converting circuit is exported direct current constant current after electric main is transformed to isolation, provides power supply for LED light source, and then drives load acting.After the output voltage and current hysteresis of the direct-current power supply converting circuit of prior art, and then make harmonic wave too high too low with power factor, while adopting this direct-current power supply converting circuit driving LED light source, can cause electrical network utilance deficiency, the too high meeting of harmonic wave causes electrical network serious interference, and then affects the normal use of other electrical equipment.
Utility model content
The purpose of this utility model is to avoid weak point of the prior art and a kind of synchronism that improves output voltage and electric current is provided, improves input power factor, reduces the direct-current power supply converting circuit of input harmonics.
A kind of direct-current power supply converting circuit, comprising: diode D1, D2, D3, D4, D5, D6, D7; There are polar capacitor C1, C3; Capacitor C 2, C4, C5, C6; Resistance R 1, R2, R3, R4, R5, R6, R7; Inductance T1-2; Transformer T1; Switch MOS pipe Q1; Integrated chip IC SY5011; One end of AC power is connected with the positive pole of diode D1 and the negative electricity of diode D4 respectively; The negative pole of diode D1 is connected with the negative electricity of diode D2; The other end of AC power is connected with the positive pole of diode D2 and the negative electricity of diode D5 respectively; The positive pole of diode D4, there is the negative pole of polar capacitor C1 to be connected with the negative electricity of diode D5; There is the positive pole of polar capacitor C1 to be connected with the negative electricity of diode D1; Resistance R 1 two ends are electrically connected with having the positive pole of polar capacitor C1 and one end of capacitor C 4 respectively; The common port of described resistance R 1 and capacitor C 4 is connected with the negative electricity of diode D6; Resistance R 3 two ends are electrically connected with the positive pole of diode D6 and one end of resistance R 4 respectively; The other end ground connection of resistance R 4; The two ends of inductance T1-2 are electrically connected with the positive pole of diode D6 and the common port of resistance R 3 and resistance R 4 respectively; The common port of resistance R 3 and resistance R 4 is electrically connected with the other end of capacitor C 4 and the ZCS of integrated chip IC SY5011 end respectively; The negative pole of diode D6 is electrically connected with the VIN end of integrated chip IC SY5011; After being connected in series with resistance R 5, the DRV end of integrated chip IC SY5011 is electrically connected with the grid of switch MOS pipe Q1; Ground connection after the COMP of integrated chip IC SY5011 holds and connects with resistance R 6 and capacitor C 6; Capacitor C 5 one end are electrically connected with the COMP end of integrated chip IC SY5011, other end ground connection; The GND end ground connection of integrated chip IC SY5011; The ISEN end of integrated chip IC SY5011 is electrically connected with the source electrode of switch MOS pipe Q1; Resistance R 7 one end are electrically connected with the source electrode of switch MOS pipe Q1, other end ground connection; There is one end of the positive pole of polar capacitor C1 and the primary coil T1-1 of transformer T1 to be electrically connected, the other end of the primary coil T1-1 of transformer T1 is electrically connected with the drain electrode of switch MOS pipe Q1, and the two ends of resistance R 2 are connected with having the positive pole of polar capacitor C1 and the negative electricity of diode D7 respectively; The positive pole of diode D7 is electrically connected with the drain electrode of switch MOS pipe Q1; Capacitor C 2 two ends are connected with having the positive pole of polar capacitor C1 and the negative electricity of diode D7 respectively; One end of the secondary coil T1-3 of transformer T1 is electrically connected with the positive pole of diode D3; The negative pole of diode D3 is electrically connected with output; Have the positive pole of polar capacitor C3 to be connected with the negative electricity of diode D3, the negative pole that has a polar capacitor C3 is electrically connected with the other end and the output of the secondary coil T1-3 of transformer T1 respectively.
The utility model compared with prior art has the following advantages: a kind of direct-current power supply converting circuit of the present utility model can improve the synchronism of output voltage and electric current, improve input power factor, reduce input harmonics, while adopting this direct-current power supply converting circuit driving LED light source, can improve electrical network utilance, reduce electrical network and disturb, and then guarantee the normal use of other electrical equipment.
Brief description of the drawings
The utility model is described in further detail to utilize accompanying drawing, but embodiment in accompanying drawing does not form any restriction of the present utility model.
Fig. 1 is the schematic diagram of a kind of direct-current power supply converting circuit of the present utility model.
Embodiment
With accompanying drawing, the utility model is further described with the following Examples:
A kind of direct-current power supply converting circuit, as shown in Figure 1, comprising: diode D1, D2, D3, D4, D5, D6, D7; There are polar capacitor C1, C3; Capacitor C 2, C4, C5, C6; Resistance R 1, R2, R3, R4, R5, R6, R7; Inductance T1-2; Transformer T1; Switch MOS pipe Q1; Integrated chip IC SY5011; One end of AC power is connected with the positive pole of diode D1 and the negative electricity of diode D4 respectively; The negative pole of diode D1 is connected with the negative electricity of diode D2; The other end of AC power is connected with the positive pole of diode D2 and the negative electricity of diode D5 respectively; The positive pole of diode D4, there is the negative pole of polar capacitor C1 to be connected with the negative electricity of diode D5; There is the positive pole of polar capacitor C1 to be connected with the negative electricity of diode D1; Resistance R 1 two ends are electrically connected with having the positive pole of polar capacitor C1 and one end of capacitor C 4 respectively; The common port of described resistance R 1 and capacitor C 4 is connected with the negative electricity of diode D6; Resistance R 3 two ends are electrically connected with the positive pole of diode D6 and one end of resistance R 4 respectively; The other end ground connection of resistance R 4; The two ends of inductance T1-2 are electrically connected with the positive pole of diode D6 and the common port of resistance R 3 and resistance R 4 respectively; The common port of resistance R 3 and resistance R 4 is electrically connected with the other end of capacitor C 4 and the ZCS of integrated chip IC SY5011 end respectively; The negative pole of diode D6 is electrically connected with the VIN end of integrated chip IC SY5011; After being connected in series with resistance R 5, the DRV end of integrated chip IC SY5011 is electrically connected with the grid of switch MOS pipe Q1; Ground connection after the COMP of integrated chip IC SY5011 holds and connects with resistance R 6 and capacitor C 6; Capacitor C 5 one end are electrically connected with the COMP end of integrated chip IC SY5011, other end ground connection; The GND end ground connection of integrated chip IC SY5011; The ISEN end of integrated chip IC SY5011 is electrically connected with the source electrode of switch MOS pipe Q1; Resistance R 7 one end are electrically connected with the source electrode of switch MOS pipe Q1, other end ground connection; There is one end of the positive pole of polar capacitor C1 and the primary coil T1-1 of transformer T1 to be electrically connected, the other end of the primary coil T1-1 of transformer T1 is electrically connected with the drain electrode of switch MOS pipe Q1, and the two ends of resistance R 2 are connected with having the positive pole of polar capacitor C1 and the negative electricity of diode D7 respectively; The positive pole of diode D7 is electrically connected with the drain electrode of switch MOS pipe Q1; Capacitor C 2 two ends are connected with having the positive pole of polar capacitor C1 and the negative electricity of diode D7 respectively; One end of the secondary coil T1-3 of transformer T1 is electrically connected with the positive pole of diode D3; The negative pole of diode D3 is electrically connected with output; Have the positive pole of polar capacitor C3 to be connected with the negative electricity of diode D3, the negative pole that has a polar capacitor C3 is electrically connected with the other end and the output of the secondary coil T1-3 of transformer T1 respectively.
Circuit principle of compositionality is: diode D1, D2, D5 and D4 composition full-wave rectifier, the alternating current of being responsible for input to come in converts pulsating direct current electric current to.Having polar capacitor C1 is high-voltage filtering capacitor, is responsible for the pulsating direct current after rectification to be modified to level and smooth direct current by the energy storage principle of electric capacity.Resistance R 1 plays delayed startup effect, charges for capacitor C 4, and while being charged to the threshold voltage of integrated chip IC SY5011, IC starts work.Capacitor C 2, resistance R 2 and diode D7 are the absorption circuit of transformer T1, limit peak-to-peak value voltage, and then protection switch metal-oxide-semiconductor Q1 are not reversed and puncture during for transformer T1 back discharge.Transformer T1 is main transformer, is responsible for that civil power high tension voltage is transformed to load required voltage by turns ratio and isolates utility grid and power supply the earth ground conductive, ensures to output to the safety of load voltage to the earth; Isolation inductance T1-2 is fed back to integrated chip IC SY5011 provides Uc, and inductance T1-2, diode D6, capacitor C 4 are the secondary power-supply rectifying filter element of integrated chip IC SY5011.The control signal that switch MOS pipe Q1 accepts integrated chip IC SY5011 and provides is carried out switch, resistance R 3, R4 are induction sample resistance, be responsible for the voltage of reverse induction to sample and offer integrated chip IC SY5011 and contrast, restriction output voltage is certain value.Winding T1-3, diode D3 and to have polar capacitor C3 be secondary commutation filter element.Resistance R 5 is integrated chip IC SY5011 output current limiting resistance, is integrated chip IC SY5011 attenuated output signal control switch metal-oxide-semiconductor Q1.Resistance R 6 and capacitor C 6 form soft start element, and C5 is loop compensation.
Input power is after diode D1, D2, D4 and D5, be Rectified alternating current by AC rectification, again by there being polar capacitor C1 energy storage Rectified alternating current to be trimmed to level and smooth direct current and to offer the Same Name of Ends of transformer T1 armature winding, transformer T1 armature winding provides drain voltage by coil for switch MOS pipe Q1, and switch MOS pipe Q1 source electrode forms major loops by resistance R 7 ground connection.It is that capacitor C 4 is charged that resistance R 1 provides a small On current, in the time that charging reaches the threshold voltage of integrated chip IC SY5011 work in the time that the voltage at capacitor C 4 two ends provides gradually, integrated chip IC SY5011 starts working, the DRV pin of integrated chip IC SY5011 starts to export high level provides high level for switch MOS pipe Q1, switch MOS pipe Q1 starts conducting, now in transformer T1 armature winding, there is electric current to flow through, according to inductance principle, the current conversion flowing through becomes magnetic field energy to be deposited with in transformer T1 magnetic core, in resistance R 7, current flowing forms voltage, by the ISEN pin position sample rate current of integrated chip IC SY5011, in the time of overtension, integrated chip IC SY5011 stops the high level output of DRV pin position, transfer low level to.The magnetic field energy that now transformer T1 deposits inside starts with armature winding back discharge according to inductance characteristic, magnetic field is converted to electric energy to winding T1, T1-2, T1-3 electric discharge, be divided into three tunnels simultaneously, be respectively: 1. the reverse power that winding T1-1 senses is idle work, and voltage is very high, for protection switch metal-oxide-semiconductor Q1 is not punctured by transformer T1 reverse voltage, the RDC absorption circuit being made up of capacitor C 2, resistance R 2, diode D7 absorbs reverse voltage, protection switch metal-oxide-semiconductor Q1; 2. inductance T1-2 winding is divided into two-way, A, be deposited with transformer T1 inside by resistance R 3 and R4 sampling energy size by sampling voltage the ZCS pin feedback to integrated chip IC SY5011, adjust the length that integrated chip IC SY5011 exports DRV high level time again, change the time of transformer T1 charging; B, the VIN pin that is filtered into integrated chip IC SY5011 by diode D6 commutation capacitor C4 provide the secondary voltage of continuous firing; It is rear class load supplying that 3.T1-3 winding passes through after diode D3 commutation capacitor C3 filtering.This circuit also has soft start function, realized by resistance R 5 and capacitor C 6, when start, an inner current source discharges to resistance R 5 and capacitor C 6, starts to start to 0.6V chip IC SY5011, at this moment internal current source power-off, the level of COMP pin is slowly realized soft start toward rising from low.This circuit also has loop compensation, improving power factor (PF) (PF value) will slow down the COMP pin charging rate of IC SY5011, the level of COMP pin is more stable, PF value is higher, this is relevant with chip operation principle, it is to realize the time that fixing DRV exports high level that chip is realized high PF value, and capacitor C 5 is also used for charge compensate.A kind of direct-current power supply converting circuit of the present utility model can improve the synchronism of output voltage and electric current, improve input power factor, reduce input harmonics, while adopting this direct-current power supply converting circuit driving LED light source, can improve electrical network utilance, reduce electrical network and disturb, and then guarantee the normal use of other electrical equipment.
Finally should be noted that; above embodiment is only in order to illustrate the technical solution of the utility model; but not restriction to the utility model protection range; although the utility model has been done to explain with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement the technical solution of the utility model, and not depart from essence and the scope of technical solutions of the utility model.
Claims (1)
1. a direct-current power supply converting circuit, is characterized in that, comprising: diode D1, D2, D3, D4, D5, D6, D7; There are polar capacitor C1, C3; Capacitor C 2, C4, C5, C6; Resistance R 1, R2, R3, R4, R5, R6, R7; Inductance T1-2; Transformer T1; Switch MOS pipe Q1; Integrated chip IC SY5011;
One end of AC power is connected with the positive pole of diode D1 and the negative electricity of diode D4 respectively; The negative pole of diode D1 is connected with the negative electricity of diode D2; The other end of AC power is connected with the positive pole of diode D2 and the negative electricity of diode D5 respectively; The positive pole of diode D4, there is the negative pole of polar capacitor C1 to be connected with the negative electricity of diode D5; There is the positive pole of polar capacitor C1 to be connected with the negative electricity of diode D1;
Resistance R 1 two ends are electrically connected with having the positive pole of polar capacitor C1 and one end of capacitor C 4 respectively; The common port of described resistance R 1 and capacitor C 4 is connected with the negative electricity of diode D6; Resistance R 3 two ends are electrically connected with the positive pole of diode D6 and one end of resistance R 4 respectively; The other end ground connection of resistance R 4; The two ends of inductance T1-2 are electrically connected with the positive pole of diode D6 and the common port of resistance R 3 and resistance R 4 respectively; The common port of resistance R 3 and resistance R 4 is electrically connected with the other end of capacitor C 4 and the ZCS of integrated chip IC SY5011 end respectively; The negative pole of diode D6 is electrically connected with the VIN end of integrated chip IC SY5011;
After being connected in series with resistance R 5, the DRV end of integrated chip IC SY5011 is electrically connected with the grid of switch MOS pipe Q1; Ground connection after the COMP of integrated chip IC SY5011 holds and connects with resistance R 6 and capacitor C 6; Capacitor C 5 one end are electrically connected with the COMP end of integrated chip IC SY5011, other end ground connection; The GND end ground connection of integrated chip IC SY5011; The ISEN end of integrated chip IC SY5011 is electrically connected with the source electrode of switch MOS pipe Q1; Resistance R 7 one end are electrically connected with the source electrode of switch MOS pipe Q1, other end ground connection;
There is one end of the positive pole of polar capacitor C1 and the primary coil T1-1 of transformer T1 to be electrically connected, the other end of the primary coil T1-1 of transformer T1 is electrically connected with the drain electrode of switch MOS pipe Q1, and the two ends of resistance R 2 are connected with having the positive pole of polar capacitor C1 and the negative electricity of diode D7 respectively; The positive pole of diode D7 is electrically connected with the drain electrode of switch MOS pipe Q1; Capacitor C 2 two ends are connected with having the positive pole of polar capacitor C1 and the negative electricity of diode D7 respectively;
One end of the secondary coil T1-3 of transformer T1 is electrically connected with the positive pole of diode D3; The negative pole of diode D3 is electrically connected with output; Have the positive pole of polar capacitor C3 to be connected with the negative electricity of diode D3, the negative pole that has a polar capacitor C3 is electrically connected with the other end and the output of the secondary coil T1-3 of transformer T1 respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420136585.5U CN203872058U (en) | 2014-03-25 | 2014-03-25 | DC power supply conversion circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420136585.5U CN203872058U (en) | 2014-03-25 | 2014-03-25 | DC power supply conversion circuit |
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| Publication Number | Publication Date |
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| CN203872058U true CN203872058U (en) | 2014-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420136585.5U Expired - Fee Related CN203872058U (en) | 2014-03-25 | 2014-03-25 | DC power supply conversion circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108809101A (en) * | 2018-05-16 | 2018-11-13 | 深圳原能电器有限公司 | A kind of highly integrated power management integrated circuit |
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2014
- 2014-03-25 CN CN201420136585.5U patent/CN203872058U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108809101A (en) * | 2018-05-16 | 2018-11-13 | 深圳原能电器有限公司 | A kind of highly integrated power management integrated circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Heng Da photoelectron Science and Technology Ltd. of Shenzhen Assignor: Liao Bingming Contract record no.: 2014440020409 Denomination of utility model: Direct-current power supply converting circuit and device Granted publication date: 20141008 License type: Exclusive License Record date: 20141210 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151217 Address after: Shenzhen Nanshan District City, Guangdong province 518000 white pine Luxili Nangang Second Industrial Park 8 Building 3 floor A Patentee after: Heng Da photoelectron Science and Technology Ltd. of Shenzhen Address before: 518000 Ka Wah Pavilion, guest garden, Baoan South Road, Luohu District, Guangdong, Shenzhen, 9B Patentee before: Liao Bingming |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20170325 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |