CN206432892U - A kind of single-stage type PFC is without stroboscopic power - Google Patents
A kind of single-stage type PFC is without stroboscopic power Download PDFInfo
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- CN206432892U CN206432892U CN201720120497.XU CN201720120497U CN206432892U CN 206432892 U CN206432892 U CN 206432892U CN 201720120497 U CN201720120497 U CN 201720120497U CN 206432892 U CN206432892 U CN 206432892U
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- power
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- stroboscopic
- power supply
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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
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Abstract
The utility model provides a kind of single-stage type PFC without stroboscopic power, including the power supply input circuit, power processor and power output end being sequentially connected, the power supply input circuit accesses external circuit, the power supply input circuit is connected to the power output end by the power processor, the power output end is connected with lamp load, it is characterised in that：Power supply input circuit includes bridge commutating circuit and the first filter condenser with bridge commutating circuit in parallel（C1）；Process chip of the power processor including removing ripple circuit and with going ripple circuit to be connected（U1）；Ripple circuit is gone to include the second filter condenser（C2）And voltage-regulator diode（DZ1）.The technique effect without stroboscopic can be realized when LED lamp work light has shake.
Description
Technical field
The utility model is related to a kind of power supply, more particularly, to a kind of single-stage type PFC without stroboscopic power.
Background technology
Switching Power Supply is occupied an leading position with the high advantage of its efficiency high, power density in field of power supplies.Generally, switch
Power supply majority is connected by rectifier with electric power network, classical rectifier be by diode or thyristor groups into one
Nonlinear circuit, it is disturbed with the serious strong harmonic current that the big filter capacitor of high pressure is produced, it has also become very noisy emission source,
The normal work of power network is compromised, and the normal work of other electrical equipments may be influenceed, also causes 220V power network pipelines
It is lost and increases severely on road.In the epoch of energy growing tension, this wastes the substantial amounts of energy.Traditional power supply exist one it is fatal
Weakness, i.e. power factor are relatively low, are typically only 0.45 ~ 0.75, and its reactive component is substantially higher hamonic wave, that is, produce compared with
Many RFI/EMI.Solve this problem, it is important to improve the power factor of Switching Power Supply.Using PFC electricity
The Switching Power Supply on road, its power factor is similar to 1 up to 0.95 ~ 0.99.
The PFC values of Switching Power Supply reach that more than 0.95 has two schemes：（One）Using the active PFC power factors school of twin-stage type
Positive circuit；（Two）Using single-stage type PFC circuit of power factor correction.
The advantage of the active PFC circuit of power factor correction of twin-stage type has：Can obtain high input power factor with it is low defeated
While entering supply harmonic, preferable output voltage characteristic is obtained, can be realized while input and output insulation is realized longer
Power down hold time,；Energy storage capacitor in circuit it is controllable, light source can be caused during LED lamp light source works without trembling
Move to realize no strobe effect.The shortcoming of this circuit has：Circuit is complex, and overall efficiency is relatively low, defeated to late-class circuit PFC
Go out characteristic requirements higher, it is higher to input current quality requirement, and two sets of control circuits are needed, cost is higher.
The advantage of single-stage type PFC circuit of power factor correction has：Single-stage type pfc circuit is by PFC and DC/DC grades of combination one
Rise, while realizing the shaping to input current and the regulation to output voltage, compared with twin-stage type circuit arrangement, it only adjusts defeated
Go out voltage, it is ensured that the stabilization of output voltage, circuit structure is fairly simple, and cost is low.The shortcoming of this circuit has：With twin-stage type circuit
Scheme is compared, and single- stage PFC circuit effect is slightly worse, and in LED lamp light source works, light source has shake and can not realize no stroboscopic
Effect.
Utility model content
, can be in LED in order to overcome the defect of above-mentioned prior art there is provided a kind of single-stage type PFC without stroboscopic power
Light source has during shake and realized the technique effect of no stroboscopic during tool work.
This programme uses following technical scheme：
A kind of single-stage type PFC is without stroboscopic power, including the power supply input circuit, power processor and the power supply that are sequentially connected are defeated
Go out end, the power supply input circuit accesses external circuit, and the power supply input circuit is connected to institute by the power processor
Power output end is stated, the power output end is connected with lamp load, it is characterised in that：
Power supply input circuit includes bridge commutating circuit and the first filter condenser with bridge commutating circuit in parallel（C1）；
Process chip of the power processor including removing ripple circuit and with going ripple circuit to be connected（U1）；
Ripple circuit is gone to include the second filter condenser（C2）And voltage-regulator diode（DZ1）.
As the improvement side of such scheme, the process chip（U1）Using model LZC821 power supply process chip.
As the improvement side of such scheme, the process chip（U1）The first pin pass through output end resistance（R18）Connection
To the negative pole of power output end.
As the improvement side of such scheme, the process chip（U1）Crus secunda simultaneously be connected to the second filter condenser
（C2）Negative pole and voltage-regulator diode（DZ1）Negative pole.
As the improvement side of such scheme, the process chip（U1）The 3rd pin pass through first resistor（R1）It is connected to electricity
The output cathode of source input circuit, while passing through chip power supply filter capacitor（C9）Ground connection.
As the improvement side of such scheme, the process chip（U1）The 4th pin be directly grounded.
As the improvement side of such scheme, the process chip（U1）The 5th pin pass through function filter capacitor（C8）Connect
Ground.
As the improvement side of such scheme, the power processor also includes a MOS field effect transistor（Q1）, the MOS field effect transistor（Q1）'s
Base stage and an emitter stage second resistance in parallel（R16）, MOS field effect transistor（Q1）Emitter stage and power output end negative pole connect, field effect
Pipe（Q1）Grounded collector.
As the improvement side of such scheme, the process chip（U1）The 6th pin and MOS field effect transistor（Q1）Base stage connection.
As the improvement side of such scheme, the power processor also includes temperature control overload protecting circuit.
While the utility model improves power factor, light source non-jitter is so as to realize when solving LED lamp work
Technique effect without stroboscopic.
Brief description of the drawings
Fig. 1 is a kind of single-stage type PFC according to the embodiment of the utility model one without stroboscopic power circuit diagram.
Embodiment
The utility model provides a kind of single-stage type PFC without stroboscopic power, including power supply input circuit, the power supply being sequentially connected
Processor and power output end, the power supply input circuit access external circuit, and the power supply input circuit passes through the power supply
Processor is connected to the power output end, and the power output end is connected with lamp load, it is characterised in that：
Power supply input circuit includes bridge commutating circuit and the first filter condenser with bridge commutating circuit in parallel（C1）；
Process chip of the power processor including removing ripple circuit and with going ripple circuit to be connected（U1）；
Ripple circuit is gone to include the second filter condenser（C2）And voltage-regulator diode（DZ1）.
The process chip（U1）Using model LZC821 power supply process chip.
The process chip（U1）The first pin pass through output end resistance（R18）It is connected to the negative pole of power output end.
The process chip（U1）Crus secunda simultaneously be connected to the second filter condenser（C2）Negative pole and voltage stabilizing two
Pole pipe（DZ1）Negative pole.
The process chip（U1）The 3rd pin pass through first resistor（R1）The output cathode of power supply input circuit is connected to,
Pass through chip power supply filter capacitor simultaneously（C9）Ground connection.
The process chip（U1）The 4th pin be directly grounded.
The process chip（U1）The 5th pin pass through function filter capacitor（C8）Ground connection.
The power processor also includes a MOS field effect transistor（Q1）, the MOS field effect transistor（Q1）Base stage and emitter stage parallel connection one second
Resistance（R16）, MOS field effect transistor（Q1）Emitter stage and power output end negative pole connect, MOS field effect transistor（Q1）Grounded collector.
The process chip（U1）The 6th pin and MOS field effect transistor（Q1）Base stage connection.
The power processor also includes temperature control overload protecting circuit.
The utility model is single-stage type pfc circuit, and type is LAP-361500-D76 V1.1, and it includes LZC811C electricity
Road, without stroboscopic chip LZC821.Chip LZC811C circuits in single-stage type pfc circuit combine PFC and DC/DC grades,
The shaping to input current and the regulation to output voltage are realized, is combined with LZC821 chips and realizes LED lamp operationally
Light source non-jitter is without stroboscopic technique effect.
As shown in figure 1, one embodiment of the present utility model is, single-stage type PFC circuit of power factor correction is LZC811C
Circuit, it combines PFC and DC/DC grades, the shaping to input current and the regulation to output voltage is realized, wherein right
The regulation of output voltage, it is ensured that the stabilization of output voltage.
As shown in figure 1, one embodiment of the present utility model without stroboscopic circuit is, no stroboscopic chip is model
LZC821, it, which has, efficiently goes stroboscopic circuit, unique short-circuit protection, unique overheat protector and flexible design.
Unique short-circuit protection principle of the present utility model is：Remove stroboscopic chip LZC821 and chip single- stage PFC circuit
When LZC811C is combined DC output generation short circuits, then stroboscopic chip LZC821 is gone to open MOSFET completely, to cause previous stage
Chip single- stage PFC circuit LZC811C triggers short-circuit protection and shut down.Chip single- stage PFC circuit LZC811C short-circuit protections occur
Afterwards, its recovery time is more than 5S, so as to farthest protect whole circuit.And the product of current Joulwatt companies
Short-circuit protection is to close MOSFET, so as to trigger the open-circuit-protection of previous stage, it is necessary to select the MOSFET compared with high withstand voltage.Therefore,
Compared with prior art, the utility model need not select the MOSFET compared with high withstand voltage.
Unique overheat protector principle of the present utility model is：When occurring excess temperature, stroboscopic chip LZC821 is gone to beat completely
MOSFET is opened, causes the power consumption on MOSFET to become very low, so that the temperature of power device is reduced, but lamp continues normal shine
It is bright, now simply without filter function.Therefore, it will not cause whole lamp all can not work due to the overheat protector of the part
Make, cause whole lamp all to extinguish.
Described above, simply preferred embodiment of the present utility model, the utility model is not limited to above-mentioned implementation
Mode, as long as it reaches technique effect of the present utility model with identical means, should all belong to protection domain of the present utility model.
Its technical scheme and/or embodiment can have a variety of modifications and variations in protection domain of the present utility model.
Claims (10)
1. a kind of single-stage type PFC is without stroboscopic power, including power supply input circuit, power processor and the power supply output being sequentially connected
End, the power supply input circuit accesses external circuit, and the power supply input circuit is connected to described by the power processor
Power output end, the power output end is connected with lamp load, it is characterised in that：
Power supply input circuit includes bridge commutating circuit and the first filter condenser (C1) with bridge commutating circuit in parallel；
Process chip (U1) of the power processor including removing ripple circuit and with going ripple circuit to be connected；
Ripple circuit is gone to include the second filter condenser (C2) and voltage-regulator diode (DZ1).
2. single-stage type PFC according to claim 1 is without stroboscopic power, it is characterised in that：The process chip (U1) uses
Model LZC821 power supply process chip.
3. single-stage type PFC according to claim 2 is without stroboscopic power, it is characterised in that：The of the process chip (U1)
One pin is connected to the negative pole of power output end by output end resistance (R18).
4. single-stage type PFC according to claim 2 is without stroboscopic power, it is characterised in that：The of the process chip (U1)
Two pin are connected to the negative pole of the second filter condenser (C2) and the negative pole of voltage-regulator diode (DZ1) simultaneously.
5. single-stage type PFC according to claim 2 is without stroboscopic power, it is characterised in that：The of the process chip (U1)
Three pin are connected to the output cathode of power supply input circuit by first resistor (R1), while passing through chip power supply filter capacitor (C9)
Ground connection.
6. single-stage type PFC according to claim 2 is without stroboscopic power, it is characterised in that：The of the process chip (U1)
Four pin are directly grounded.
7. single-stage type PFC according to claim 2 is without stroboscopic power, it is characterised in that：The of the process chip (U1)
Five pin are grounded by function filter capacitor (C8).
8. single-stage type PFC according to claim 2 is without stroboscopic power, it is characterised in that：The power processor also includes
One MOS field effect transistor (Q1), base stage and emitter stage a second resistance (R16) in parallel for the MOS field effect transistor (Q1), the emitter stage of MOS field effect transistor (Q1)
It is connected with the negative pole of power output end, the grounded collector of MOS field effect transistor (Q1).
9. single-stage type PFC according to claim 8 is without stroboscopic power, it is characterised in that：The of the process chip (U1)
Six pin are connected with the base stage of MOS field effect transistor (Q1).
10. single-stage type PFC according to claim 1 is without stroboscopic power, it is characterised in that：The power processor also includes
Temperature control overload protecting circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720120497.XU CN206432892U (en) | 2017-02-09 | 2017-02-09 | A kind of single-stage type PFC is without stroboscopic power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720120497.XU CN206432892U (en) | 2017-02-09 | 2017-02-09 | A kind of single-stage type PFC is without stroboscopic power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206432892U true CN206432892U (en) | 2017-08-22 |
Family
ID=59591285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720120497.XU Expired - Fee Related CN206432892U (en) | 2017-02-09 | 2017-02-09 | A kind of single-stage type PFC is without stroboscopic power |
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| CN (1) | CN206432892U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112803752A (en) * | 2021-03-19 | 2021-05-14 | 深圳原能电器有限公司 | Valley-filling and stroboflash-free PFC converter and control method |
-
2017
- 2017-02-09 CN CN201720120497.XU patent/CN206432892U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112803752A (en) * | 2021-03-19 | 2021-05-14 | 深圳原能电器有限公司 | Valley-filling and stroboflash-free PFC converter and control method |
| CN112803752B (en) * | 2021-03-19 | 2021-11-05 | 深圳原能电器有限公司 | Valley-filling and non-stroboscopic PFC converter |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170822 Termination date: 20220209 |
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| CF01 | Termination of patent right due to non-payment of annual fee |