CN205124090U - A high power factor regulator circuit for passive LED drive circuit - Google Patents
A high power factor regulator circuit for passive LED drive circuit Download PDFInfo
- Publication number
- CN205124090U CN205124090U CN201520952831.9U CN201520952831U CN205124090U CN 205124090 U CN205124090 U CN 205124090U CN 201520952831 U CN201520952831 U CN 201520952831U CN 205124090 U CN205124090 U CN 205124090U
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- China
- Prior art keywords
- led drive
- led
- power factor
- circuit
- high power
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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
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a high power factor regulator circuit for passive LED drive circuit, characterized by, including rectifier circuit, LED load, LED driver chip, filter capacitance C2, series connection at the restriction resistance R2 of filter capacitance C2 negative pole and the drain resistor R0 who connects in parallel at the rectifier circuit output, filter capacitance C2's positive pole is connected with LED driver chip through the LED load, drain resistor R0 simultaneously with filter capacitance C2, the restriction resistance R2 parallel connection of series connection. The utility model discloses the circuit makes the higher and LED of PFC can not produce the stroboscopic, and the circuit range of application is wider.
Description
Technical field
The utility model relates to a kind of High Power Factor Circuit tuning for passive LED drive circuit, belongs to LED technology field.
Background technology
Passive LED drive circuit conventional at present arranges electric capacity as energy storage after rectifier bridge, when input voltage is lower, capacitor discharge is with maintenance work electric current, when voltage instability raises, unnecessary voltage power is born by linear constant current driving chip, but the electric capacity of input side causes electric current unbalanced input power factor PFC improving, general all below 0.6, if do not connect electric capacity, then there is serious stroboscopic.
LED is divided into many groups and is connected in series by some schemes, when voltage reduce LED complete not bright time, then cut away one group or a few LEDs and make other LED can maintenance work electric current, a part of stroboscopic can be reduced, PFC also can accomplish more than 0.9, but LED can not be entirely bright, is equivalent to stroboscopic problem and still exists.
Utility model content
For solving the deficiencies in the prior art, the purpose of this utility model is to provide a kind of High Power Factor Circuit tuning for passive LED drive circuit, makes PFC higher and without stroboscopic problem.
In order to realize above-mentioned target, the utility model adopts following technical scheme: a kind of High Power Factor Circuit tuning for passive LED drive circuit, it is characterized in that, comprise rectification circuit, LED load, LED drive chip, filter capacitor C2, be connected on the limiting resistance R2 of filter capacitor C2 negative pole and be connected in parallel on the bleeder resistance R0 of rectification circuit output end; The positive pole of described filter capacitor C2 is connected with LED drive chip through LED load; Described bleeder resistance R0 is connected in parallel with the filter capacitor C2 be connected in series, limiting resistance R2 simultaneously.
Aforesaid a kind of High Power Factor Circuit tuning for passive LED drive circuit, it is characterized in that, described LED drive chip is PT6913A/B.
Aforesaid a kind of High Power Factor Circuit tuning for passive LED drive circuit, is characterized in that, the chip power feed end VLN of described LED drive chip is connected with LED load; Earth terminal is connected with the electrical nodes A of bleeder resistance R0 with limiting resistance R2; Output current arranges port IS and is connected in series ground connection after resistance R1.
Aforesaid a kind of High Power Factor Circuit tuning for passive LED drive circuit, is characterized in that, the size of described limiting resistance R2 is 50-500 ohm.
Aforesaid a kind of High Power Factor Circuit tuning for passive LED drive circuit, it is characterized in that, described rectification circuit is bridge rectifier.
Aforesaid a kind of High Power Factor Circuit tuning for passive LED drive circuit, it is characterized in that, described LED load is some LED strip/and combines.
The beneficial effect that the utility model reaches: PFC of the present utility model is higher and LED can not produce stroboscopic, and circuit application is wider.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.Following examples only for clearly the technical solution of the utility model being described, and can not limit protection range of the present utility model with this.
A kind of High Power Factor Circuit tuning for passive LED drive circuit, it is characterized in that, comprise rectification circuit, LED load, LED drive chip, filter capacitor C2, be connected on the limiting resistance R2 of filter capacitor C2 negative pole and be connected in parallel on the bleeder resistance R0 of rectification circuit output end; The positive pole of described filter capacitor C2 is connected with LED drive chip through LED load; Described bleeder resistance R0 is connected in parallel with the filter capacitor C2 be connected in series, limiting resistance R2 simultaneously.
LED drive chip is PT6913A/B, and this chip is superhigh pressure linear constant current drive IC, is applicable to drive high voltage small area analysis LED load, and its application scheme outer member is few, compact in design, can simply and flexibly design ap-plication in various LED product.Simple linear drive mode not only can improve power factor, raises the efficiency, and also can avoid EMI electromagnetic interference problem.
PT6913A/B adopts linear constant current to control output current, and inner integrated extra high tension power MOS, output current is set as 5mA ~ 60mA by non-essential resistance.PT6913A/B maximum input voltage can reach 400V, provides LED open circuit, LED short-circuit protection.Under any circumstance, the excess voltage that input power exceeds LED load is all born by PT6913A/B, and LED load can not face overvoltage and threaten, and this provides extreme high reliability and stability for overall plan.In order to prevent IC from crossing cause thermal damage, PT6913A/B integrated temperature attenuation function, when IC portion junction temperature rises to 130 DEG C, PT6913A/B starts to reduce output current, and when junction temperature reaches 150 DEG C, output current will be decreased to 0.This can be avoided the flicker problem of traditional overheat protector mode.
The chip power feed end VIN of LED drive chip is connected with LED load; GND earth terminal is connected with the electrical nodes A of bleeder resistance R0 with limiting resistance R2; Output current arranges port IS and is connected in series ground connection after resistance R1.
The large I of limiting resistance R2 is set to 50-500 ohm.
Rectification circuit is bridge rectifier.
LED load is some LED strip/and combines.
Utilize this Circuit tuning that PFC can be made to adjust to more than 0.7 and LED can not produce stroboscopic, circuit application is wider.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvement and distortion, these improve and distortion also should be considered as protection range of the present utility model.
Claims (6)
1. the High Power Factor Circuit tuning for passive LED drive circuit, it is characterized in that, comprise rectification circuit, LED load, LED drive chip, filter capacitor C2, be connected on the limiting resistance R2 of filter capacitor C2 negative pole and be connected in parallel on the bleeder resistance R0 of rectification circuit output end; The positive pole of described filter capacitor C2 is connected with LED drive chip through LED load; Described bleeder resistance R0 is connected in parallel with the filter capacitor C2 be connected in series, limiting resistance R2 simultaneously.
2. a kind of High Power Factor Circuit tuning for passive LED drive circuit according to claim 1, it is characterized in that, described LED drive chip is PT6913A/B.
3. a kind of High Power Factor Circuit tuning for passive LED drive circuit according to claim 2, is characterized in that, the chip power feed end VLN of described LED drive chip is connected with LED load; Earth terminal is connected with the electrical nodes A of bleeder resistance R0 with limiting resistance R2; Output current arranges port IS and is connected in series ground connection after resistance R1.
4. a kind of High Power Factor Circuit tuning for passive LED drive circuit according to claim 1, is characterized in that, the size of described limiting resistance R2 is 50-500 ohm.
5. a kind of High Power Factor Circuit tuning for passive LED drive circuit according to claim 1, it is characterized in that, described rectification circuit is bridge rectifier.
6. a kind of High Power Factor Circuit tuning for passive LED drive circuit according to claim 1, it is characterized in that, described LED load is some LED strip/and combines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520952831.9U CN205124090U (en) | 2015-11-26 | 2015-11-26 | A high power factor regulator circuit for passive LED drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520952831.9U CN205124090U (en) | 2015-11-26 | 2015-11-26 | A high power factor regulator circuit for passive LED drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205124090U true CN205124090U (en) | 2016-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520952831.9U Expired - Fee Related CN205124090U (en) | 2015-11-26 | 2015-11-26 | A high power factor regulator circuit for passive LED drive circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN205124090U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105307354A (en) * | 2015-11-26 | 2016-02-03 | 苏州汉克山姆照明科技有限公司 | Adjusting circuit with high power factor for passive LED driving circuit |
-
2015
- 2015-11-26 CN CN201520952831.9U patent/CN205124090U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105307354A (en) * | 2015-11-26 | 2016-02-03 | 苏州汉克山姆照明科技有限公司 | Adjusting circuit with high power factor for passive LED driving circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 Termination date: 20181126 |
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| CF01 | Termination of patent right due to non-payment of annual fee |