CN206977757U - High PF, the LED daylight lamp drive circuit without stroboscopic, doubleway output - Google Patents
High PF, the LED daylight lamp drive circuit without stroboscopic, doubleway output Download PDFInfo
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- CN206977757U CN206977757U CN201720846832.4U CN201720846832U CN206977757U CN 206977757 U CN206977757 U CN 206977757U CN 201720846832 U CN201720846832 U CN 201720846832U CN 206977757 U CN206977757 U CN 206977757U
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Abstract
LED daylight lamp drive circuit the utility model discloses a kind of high PF, without stroboscopic, doubleway output, it is characterised in that AC220V input connection single- stage PFC circuits, single- stage PFC circuit connection constant voltage outputting circuit；Constant voltage outputting circuit on the one hand connection single- stage PFC circuit output feedback PWM controls, on the other hand connect two-way BUCK circuits respectively；The two-way BUCK circuits are respectively by exporting low ripple, without stroboscopic electric current after filter circuit.This programme realizes that two-way is simple without stroboscopic drive circuit, system schema using high PF constant pressures+two-way BUCK constant current outputs：Constant current accuracy≤3% can be realized, output ripple coefficient ＜ 5%, makes lamp tube service life longer, visual fatigue will not be produced to human eye；Scheme cost is low, and reliability is high, is adapted to large-scale application.
Description
Technical field
The driving power field of room lighting LED is the utility model is related to, specifically a kind of high PF, without stroboscopic, double
The LED daylight lamp drive circuit of road output.
Background technology
In recent years, with the growing tension of global energy problem, the requirement to energy-conserving and environment-protective is more and more prominent.Traditional is white
Vehement lamp, electricity-saving lamp, by with long lifespan, energy-efficient, the LED of specular removal is replaced.And common LED illumination can realize height
Light efficiency, the long-life, power factor can realize power factor 0.9, but power frequency flicker problem can not solve；And LED light source stroboscopic
Some harm are had, easily cause visual fatigue, cause vision impairment.High PF, the not only energy-conserving and environment-protective of no stroboscopic, LED power, and
And solve the problems, such as light source stroboscopic, eyesight will not be caused to damage, be the light source of safe green.
The features such as without stroboscopic, high efficiency, high PF values, in promotion energy-saving and emission-reduction, the epoch of low-carbon economy, possesses energy-saving efficiency
Height, it is easy to large-scale production, it has also become the mainstream technology of LED market developments.It is used primarily in fluorescent lamp, street lamp, auto lamp at present
The application fields such as tool.
Fig. 1 gives two-step scheme APFC+PWM schematic block circuit diagrams in the market, and Fig. 2 gives single- stage PFC, power supply
Using removing stroboscopic module theory diagram, the circuit system carried out using both modes after rectification, which wants two parts, could realize pair for output
Road exports, and PFC inductance and main isolating transformer model want mostly more relative to BUCK inductance, and cost is very high.
Utility model content
The utility model is for problem present in background technology, it is proposed that a kind of high PF, without stroboscopic, doubleway output
LED daylight lamp drive circuit, AC220V input connection single- stage PFC circuits, single- stage PFC circuit connection constant voltage outputting circuit；Constant pressure
Output circuit on the one hand connection single- stage PFC circuit output feedback PWM controls, on the other hand connect two-way BUCK circuits respectively；Institute
Two-way BUCK circuits are stated respectively by exporting low ripple after filter circuit, without stroboscopic electric current.
The filter circuit is small capacitances π type filter circuits.
The BUCK circuits by built-in MOS IC:MT7813 and small inductance composition.
The beneficial effects of the utility model
Extensive large space room lighting uses double fluorescent tubes substantially at present, and this programme is using high PF constant pressures+two-way BUCK perseverances
Stream output realizes that two-way is simple without stroboscopic drive circuit, system schema：Constant current accuracy≤3%, output ripple coefficient can be realized
＜ 5%, make lamp tube service life longer, visual fatigue will not be produced to human eye；Scheme cost is low, and reliability is high, on a large scale should be adapted to
With.
Brief description of the drawings
Fig. 1 is preceding in the market two-step scheme APFC+PWM schematic block circuit diagrams.
Fig. 2 single- stage PFCs (power supply output, which uses, goes stroboscopic module) theory diagram.
Fig. 3 is that the utility model uses two-way without stroboscopic driving circuit principle block diagram.
Fig. 4 is the circuit diagram of the utility model BUCK circuits.
Embodiment
With reference to embodiment, the utility model is described in further detail, but the scope of protection of the utility model is not limited to
This：
Embodiment 1：With reference to Fig. 3, a kind of high PF, the LED daylight lamp drive circuit without stroboscopic, doubleway output, its feature exist
Connection single- stage PFC circuit, single- stage PFC circuit connection constant voltage outputting circuit are inputted in AC220V；On the one hand constant voltage outputting circuit connects
The output feedback PWM controls of order level pfc circuit, on the other hand connect two-way BUCK circuits respectively；The two-way BUCK circuits point
Not by exporting low ripple after filter circuit, without stroboscopic electric current.
Embodiment 2：LED daylight lamp drive circuit as described in Example 1, the filter circuit filter for small capacitances π types
Circuit.
Embodiment 3：LED daylight lamp drive circuit as described in Example 1, with reference to Fig. 4, as wherein all the way BUCU electricity
Road, the BUCK circuits by built-in MOS IC:MT7813 and small inductance composition.
Principle analysis：
1st, more than 0.95 can be brought up to through single- stage PFC circuit of power factor correction, power factor after AC rectification, can be with
Suppress to produce substantial amounts of current harmonics and reactive power, pollution will not be produced to power network.
2nd, preceding stage high frequency inversion filters through bulky capacitor, and output constant pressure (low-ripple voltage, contributes to rear class to realize that low ripple is imitated
Fruit), rear class output carrying two-way BUCK circuits (built-in MOS IC+ small inductances) realize output constant current, then by small capacitances π
Type filters, it is possible to realizes output low ripple, no stroboscopic.
3rd, through described above and Fig. 3 block diagrams ,+two BUCK circuits of one system (main transformer) of this scheme new application are just
Inexpensive doubleway output can be realized without stroboscopic drive circuit.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
So that by circuit configuration, to instruct the hardware of correlation, come what is completed, the circuit configuration can pass through single-chip microcomputer or other similar functions
Integrated chip complete, be prior art.Core utility model point of the present utility model is the integral structure layout of system, office
Portion's control method can be completed by prior art program；Local module connection can be achieved by the prior art.
Specific embodiment described herein is only that the utility model spirit is illustrated.The utility model institute
Category those skilled in the art can make various modifications or supplement to described specific embodiment or using similar
Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.
Claims (3)
1. a kind of high PF, the LED daylight lamp drive circuit without stroboscopic, doubleway output, it is characterised in that AC220V connection single- stage PFCs
The input of circuit, the input of the output end connection constant voltage outputting circuit of single- stage PFC circuit；The output end of constant voltage outputting circuit
On the one hand the input of connection single- stage PFC circuit carries out output feedback PWM controls, on the other hand connects two-way BUCK circuits respectively
Input；The output end of the two-way BUCK circuits is respectively by exporting low ripple, without stroboscopic electric current after filter circuit.
2. LED daylight lamp drive circuit according to claim 1, it is characterised in that the filter circuit is small capacitances π types
Filter circuit.
3. LED daylight lamp drive circuit according to claim 1, it is characterised in that the BUCK circuits are by built-in MOS's
IC:MT7813 and small inductance composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720846832.4U CN206977757U (en) | 2017-07-12 | 2017-07-12 | High PF, the LED daylight lamp drive circuit without stroboscopic, doubleway output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720846832.4U CN206977757U (en) | 2017-07-12 | 2017-07-12 | High PF, the LED daylight lamp drive circuit without stroboscopic, doubleway output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206977757U true CN206977757U (en) | 2018-02-06 |
Family
ID=61402327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720846832.4U Active CN206977757U (en) | 2017-07-12 | 2017-07-12 | High PF, the LED daylight lamp drive circuit without stroboscopic, doubleway output |
Country Status (1)
| Country | Link |
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| CN (1) | CN206977757U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108601140A (en) * | 2018-04-27 | 2018-09-28 | 苏州诺登德智能科技有限公司 | A kind of controllable silicon light modulation LED drive circuit |
-
2017
- 2017-07-12 CN CN201720846832.4U patent/CN206977757U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108601140A (en) * | 2018-04-27 | 2018-09-28 | 苏州诺登德智能科技有限公司 | A kind of controllable silicon light modulation LED drive circuit |
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