CN217985470U - Novel keep apart monopole and do not have stroboscopic area power factor and rectify LED drive power supply - Google Patents
Novel keep apart monopole and do not have stroboscopic area power factor and rectify LED drive power supply Download PDFInfo
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- CN217985470U CN217985470U CN202222065525.6U CN202222065525U CN217985470U CN 217985470 U CN217985470 U CN 217985470U CN 202222065525 U CN202222065525 U CN 202222065525U CN 217985470 U CN217985470 U CN 217985470U
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Abstract
The utility model discloses a novel isolated monopole non-stroboscopic belt power factor correction LED driving power supply, which comprises a power supply, a rectification circuit, a high-voltage starting circuit, a protection circuit, an isolated driving chip, a detection circuit, a damping circuit and a transformer; the power supply is electrically connected with the rectifying circuit and used for providing an input power supply, the protection circuit is connected with the rectifying circuit and the damping circuit, the high-voltage starting circuit is connected with the rectifying circuit, the protection circuit and the isolation driving chip, the detection circuit is connected with the input end of the transformer, the damping circuit is connected with the input end of the transformer, and the output end of the transformer is connected with the LED.
Description
Technical Field
The utility model relates to the field of electronic technology, in particular to novel keep apart monopole and do not have stroboscopic area power factor and rectify LED drive power supply.
Background
Because of its characteristics of high luminous efficiency, high efficiency, energy saving, long service life, etc., LEDs are widely used in various fields such as urban greening lighting and indoor and outdoor lighting.
The existing LED driving power supply adopts a single-pole LED circuit with high power factor and stroboscopic effect, on one hand, the circuit adopts a high-voltage small Cbb capacitor, and the output has power frequency stroboscopic effect of 100-120 HZ; on the other hand, in a circuit with low power factor and no stroboflash of the traditional single-pole LED power supply, cin is a high-voltage DC with stable large electrolytic capacitor, so that the power factor is low, the output is stable and no power frequency stroboflash exists, and therefore the existing LED driving power supply cannot simultaneously meet the output without stroboflash and high power factor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a novel keep apart no stroboscopic power factor of monopole and rectify LED drive power supply, aim at providing the drive power supply who does not have stroboscopic and high power.
In order to achieve the purpose, the novel isolated monopole non-stroboscopic belt power factor correction LED driving power supply comprises a power supply, a rectifying circuit, a high-voltage starting circuit, a protection circuit, an isolated driving chip, a detection circuit, a damping circuit and a transformer;
the power supply is electrically connected with the rectifying circuit and used for providing an input power supply, the protection circuit is connected with the rectifying circuit and the damping circuit, the high-voltage starting circuit is connected with the rectifying circuit, the protection circuit and the isolation driving chip, the detection circuit is connected with the input end of the transformer, the damping circuit is connected with the input end of the transformer, and the output end of the transformer is connected with the LED.
Optionally, the high-voltage starting circuit includes a first resistor and a first capacitor, one end of the first resistor is connected to the rectifying circuit, the other end of the first resistor is connected to one end of the first capacitor and a power supply pin of the isolation driving chip, and the other end of the first capacitor is grounded.
Optionally, the protection circuit includes a first diode, an anode of the first diode is connected to the rectifying circuit, and a cathode of the first diode is connected to the damping circuit.
Optionally, a power switch pin of the isolation driving chip is respectively connected to a cathode of a second diode and a dotted terminal of the primary coil of the transformer, and an anode of the second diode is connected to the rectifying circuit through a first inductor.
Optionally, the snubber circuit includes a second resistor, a second capacitor, and a third diode, where the second resistor and the second capacitor are connected in parallel, and one end of the second resistor is connected to the cathode of the second diode and the primary winding of the transformer, and the other end of the second resistor is connected to the cathode of the first diode and the anode of the third diode, the cathode of the third diode is connected to the primary winding of the transformer and to the anode of a first electrolytic capacitor, and the cathode of the first electrolytic capacitor is connected to the detection circuit.
Optionally, the detection circuit includes a demagnetization detection unit, a constant current detection unit, and a switch current detection unit, the negative electrode of the first electrolytic capacitor is connected to the constant current detection unit and the output constant current detection pin of the isolation driver chip, the constant current detection unit is connected to the demagnetization detection unit and the switch current detection unit, the switch current detection unit is connected to the overcurrent detection pin of the isolation driver chip, and the demagnetization detection unit is connected to the protection detection pin of the isolation driver chip.
Optionally, the constant current detection unit includes a third resistor and a fourth diode, one end of the third resistor is connected to the cathode of the first electrolytic capacitor, and the other end of the third resistor is grounded; and the anode of the fourth diode is connected with the anode of the first electrolytic capacitor, and the cathode of the fourth diode is grounded.
Optionally, the switch current detection unit includes a fourth resistor, and one end of the fourth resistor is connected to the overcurrent detection pin of the isolation driver chip.
Optionally, the demagnetization detecting unit includes a fifth resistor and a sixth resistor, one end of the fifth resistor is connected to the protection detection pin of the isolation driving chip and one end of the sixth resistor, and the other end of the fifth resistor is connected to the end of the same name of the auxiliary winding of the transformer; the different name end of the transformer auxiliary winding is grounded, the other end of the sixth resistor is grounded, and the same name end of the transformer auxiliary winding is connected with the power supply pin of the isolation driving chip through a seventh resistor and a fifth diode.
Preferably, one end of the seventh resistor is connected to the dotted end of the transformer auxiliary winding, the other end of the seventh resistor is connected to the anode of the fifth diode, and the cathode of the fifth diode is connected to the power supply pin of the isolation driving chip.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses technical scheme LED drive power supply sets up keeps apart driver chip, detection circuitry and damping circuit and forms closed-loop control, and the quick starting circuit of high-pressure starting circuit, and protection circuit prevents the abrupt wave, and damping circuit inhales the wave electromagnetic shield, and detection circuitry realizes that transformer demagnetization detects, constant current output detects and keeps apart driver chip's internal current and detects, and drive power supply can realize not having flicker and high power factor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a circuit diagram of an embodiment of the isolated monopole non-strobe power factor correction LED driving power supply of the present invention;
fig. 2 is a block diagram of the novel isolated unipolar non-strobe band power factor correction LED driver power supply of fig. 1.
The reference numbers illustrate:
| reference numerals | Name(s) | Reference numerals | Name(s) |
| 10 | |
20 | Rectifying |
| 30 | High- |
40 | |
| 50 | Isolated |
60 | |
| 70 | Detection circuit | 80 | |
| 21 | First rectifying |
22 | Second rectifying |
| 23 | |
24 | Fourth rectifying |
| 71 | |
72 | Constant |
| 73 | Switching current |
61 | First electrolytic capacitor |
The realization, the functional characteristics and the advantages of the utility model are further explained by combining the embodiment and referring to the attached drawings.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "including" and "having," and any variations thereof, in the description and claims of this invention and the description of the above figures are intended to cover non-exclusive inclusions; the terms "first," "second," and the like in the description and claims of the present invention or in the above-described drawings are used for distinguishing between different objects and not for describing a particular sequential order.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In an embodiment of the present invention, a novel isolated monopole stroboflash-free power factor correction LED driving power supply is provided, which includes a power supply, a rectifying circuit, a high voltage starting circuit, a protection circuit, an isolated driving chip, a detection circuit, a damping circuit and a transformer;
the power supply is electrically connected with the rectifying circuit and used for providing an input power supply, the protection circuit is connected with the rectifying circuit and the damping circuit, the high-voltage starting circuit is connected with the rectifying circuit, the protection circuit and the isolation driving chip, the detection circuit is connected with the input end of the transformer, the damping circuit is connected with the input end of the transformer, and the output end of the transformer is connected with the LED.
The utility model discloses it forms closed-loop control to set up isolation driver chip, detection circuitry and snubber circuit to high-pressure starting circuit quick starting circuit, protection circuit prevent the abrupt wave, and snubber circuit inhales the wave electromagnetic shield, and detection circuitry realizes that transformer demagnetization detects, constant current output detects and keeps apart driver chip's internal current and detects, and drive power supply can realize no stroboscopic and high power factor.
In order to make the technical field person understand the scheme of the present invention better, the technical scheme in the embodiment of the present invention will be clearly and completely described below with reference to the attached drawings in the embodiment of the present invention.
Referring to fig. 1-2, the present invention provides a novel isolated monopole non-stroboscopic power factor correction LED driving power supply, which comprises a power supply 10, a rectifying circuit 20, a high voltage starting circuit 30, a protection circuit 40, an isolated driving chip 50, a damping circuit 60, a detection circuit 70 and a transformer 80,
with reference to fig. 1-2, the power supply 10 is electrically connected to the rectifying circuit 20, the power supply 10 is configured to provide ac power, the rectifying circuit 20 is configured to convert ac power into dc power for output, the protection circuit 40 is connected to the rectifying circuit 20 and the damping circuit 60 for preventing high voltage surge, the high voltage start circuit 30 is connected to the rectifying circuit 20, the protection circuit 40 and the isolation driver chip 50, the detection circuit 70 is connected to an input terminal of the transformer 80, the damping circuit 60 is connected to an input terminal of the transformer 80 for absorbing wave and damping, an output terminal of the transformer 80 is connected to the LED200 for supplying power to the LED, and the driving power supply can achieve flicker free and high power factor.
In an embodiment of the present invention, the rectifier circuit 20 is a bridge rectifier circuit, and specifically includes a first rectifier diode 21, a second rectifier diode 22, a third rectifier diode 23, a fourth rectifier diode 24, and a rectifier capacitor 25; the first rectifying diode 21 and the second rectifying diode 22 are connected in series and are connected in parallel with the third rectifying diode 23 and the fourth rectifying diode 24, and the third rectifying diode 23 is connected in series with the fourth rectifying diode 24; the cathode of the first rectifier diode 21 is connected to the anode of the power supply 10, the cathode of the power supply 10 is connected to the cathode of the third rectifier diode 23, the anodes of the first rectifier diode 21 and the third rectifier diode 23 are grounded, the rectifier capacitor 25 is connected in parallel to the first rectifier diode 21 and the second rectifier diode 22, and the rectifier unit 20 is configured to convert low-frequency ac power into dc power and load the dc power to the high-voltage start-up circuit 30 and the protection circuit 40.
The utility model discloses an in one embodiment, high voltage starting circuit 30 is including first resistance R1 and first electric capacity C1, first resistance R1's one end with rectifier circuit 20's connection, the other end with first electric capacity C1's one end reaches keep apart drive chip 50's power supply pin and connect, first electric capacity C1 other end ground connection for quick starting circuit. More specifically, one end of the first resistor R1 is connected to the cathodes of the two rectifier diodes 22 and the fourth rectifier diode 24.
Referring to fig. 1 and 2, in an embodiment of the present invention, the protection circuit 40 includes a first diode D1, an anode of the first diode D1 is connected to the rectification circuit 20, and a cathode of the first diode D1 is connected to the damping circuit 60. More specifically, the anode of the first diode D1 is connected to the cathodes of the two rectifier diodes 22 and the fourth rectifier diode 24.
In an embodiment of the present invention, the power switch pin of the isolation driving chip 50 connects the cathode of a second diode D2 and the dotted terminal of the primary coil of the transformer 80, the anode of the second diode D2 is connected through a first inductor L1 to the rectifying circuit, the first inductor L1 is used to protect the power driving power supply from the impact of surge current, high voltage of the power grid and/or large current, and to suppress harmonic and noise, and filter common mode interference and differential mode interference. Specifically, the first inductor L1 is connected to cathodes of the two rectifier diodes 22 and the fourth rectifier diode 24.
In an embodiment of the present invention, the damping circuit 60 includes a second resistor R2, a second capacitor C2 and a third diode D3, the second resistor R2 and the second capacitor C2 are connected in parallel, and one end is connected the cathode of the second diode D2 and the dotted end of the primary coil of the transformer 80, the other end is connected to the cathode of the first diode D1 and the anode of the third diode D3, the cathode of the third diode D3 and the dotted end of the primary coil of the transformer 80 are connected to connect to the anode of a first electrolytic capacitor 61, the cathode of the first electrolytic capacitor 61 and the detection circuit 70 are connected, and the damping circuit 60 is used for absorbing and damping.
The utility model discloses an embodiment, detection circuitry 70 includes demagnetization detecting element 71, constant current detecting element 72 and switch current detecting element 73, first electrolytic capacitor 61's negative pole with constant current detecting element 72 reaches keep apart driver chip 50's output constant current and detect the pin and connect, constant current detecting element 72 respectively with demagnetization detecting element 71 reaches switch current detecting element 73 connects, switch current detecting element 73 with keep apart driver chip 50's overcurrent and detect the pin and connect, demagnetization detecting element 71 with keep apart driver chip 50's protection and detect the pin and connect.
In an embodiment of the present invention, the constant current detection unit 72 includes a third resistor R3 and a fourth diode D4, one end of the third resistor R3 is connected to the cathode of the first electrolytic capacitor 61, and the other end is grounded; the anode of the fourth diode D4 is connected to the anode of the first electrolytic capacitor 61, and the cathode is grounded, so as to detect whether to output a constant current.
The switch current detecting unit 73 includes a fourth resistor R4, and one end of the fourth resistor R4 is connected to the overcurrent detecting pin of the isolation driving chip 50 for overcurrent protection.
In an embodiment of the present invention, the demagnetization detecting unit 71 includes a fifth resistor R5 and a sixth resistor R6, one end of the fifth resistor R5 is connected to the protection detecting pin of the isolation driving chip 50 and one end of the sixth resistor R6, and the other end is connected to the end of the transformer auxiliary winding T1 with the same name; the different name end of the transformer auxiliary winding T1 is grounded, the other end of the sixth resistor R6 is grounded, and the same name end of the transformer auxiliary winding T1 is connected to the power supply pin of the isolation driving chip 50 through a seventh resistor R7 and a fifth diode D5.
Further, one end of the seventh resistor R7 is connected to the dotted end of the transformer auxiliary winding T1, the other end of the seventh resistor R is connected to the anode of the fifth diode D5, and the cathode of the fifth diode D5 is connected to the power supply pin of the isolation driving chip 50.
It is understood that the isolated driver chip 50 includes a MOSFET tube, and the switching current detection unit 73 is used for detecting a current flowing through the MOSFET tube, which may be, but is not limited to, the UCC 28704.
The dotted terminal of the secondary coil of the transformer 80 is connected to the anode of a sixth diode D6, the cathode of the sixth diode D6 is connected to the LED200, the cathode of the sixth diode D6 is connected to the anode of a second electrolytic capacitor, and the cathode of the second electrolytic capacitor is connected to the dotted terminal of the secondary coil of the transformer 80.
This application sets up among the LED drive power supply and keeps apart driver chip, detection circuitry and snubber circuit and form closed-loop control to the quick starting circuit of high-pressure starting circuit, protection circuit prevents the abrupt wave, and snubber circuit inhales the wave electromagnetic shield, and detection circuitry realizes that transformer demagnetization detects, constant current output detects and keeps apart driver chip's internal current and detects, and drive power supply can realize not having the output of flicker and high power factor.
The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all under the inventive concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (10)
1. A novel isolated monopole non-stroboscopic LED driving power supply with power factor correction is characterized by comprising a power supply, a rectifying circuit, a high-voltage starting circuit, a protection circuit, an isolated driving chip, a detection circuit, a damping circuit and a transformer;
the power supply is electrically connected with the rectifying circuit and used for providing an input power supply, the protection circuit is connected with the rectifying circuit and the damping circuit, the high-voltage starting circuit is connected with the rectifying circuit, the protection circuit and the isolation driving chip, the detection circuit is connected with the input end of the transformer, the damping circuit is connected with the input end of the transformer, and the output end of the transformer is connected with the LED.
2. The novel isolated unipolar non-strobe power factor correction LED drive power supply of claim 1, wherein said high voltage start-up circuit comprises a first resistor and a first capacitor, one end of said first resistor is connected to said rectifier circuit, the other end of said first resistor is connected to one end of said first capacitor and to said power supply pin of said isolated driver chip, and the other end of said first capacitor is grounded.
3. The isolated unipolar no-strobe band power factor correction (LED) driver power supply of claim 2 wherein said protection circuit comprises a first diode, said first diode having an anode connected to said rectifier circuit and a cathode connected to said snubber circuit.
4. The isolated unipolar non-strobe power factor correction LED drive power supply of claim 3 wherein said isolated driver chip has its power switch pins connected to the cathode of a second diode and the dotted terminal of said transformer primary coil, respectively, and the anode of said second diode is connected to said rectifier circuit through a first inductor.
5. The isolated unipolar no-strobe LED drive power supply of claim 4 further comprising a second resistor, a second capacitor and a third diode, wherein said second resistor and said second capacitor are connected in parallel, one end of said second resistor is connected to said cathode of said second diode and said primary winding of said transformer, the other end of said second resistor is connected to said cathode of said first diode and said anode of said third diode, said cathode of said third diode is connected to said primary winding of said transformer and to said anode of a first electrolytic capacitor, and said cathode of said first electrolytic capacitor is connected to said detection circuit.
6. The novel isolated unipolar non-strobe LED driving power supply according to claim 5, wherein said detection circuit comprises a demagnetization detection unit, a constant current detection unit and a switch current detection unit, wherein the negative electrode of said first electrolytic capacitor is connected to said constant current detection unit and to the output constant current detection pin of said isolated driving chip, said constant current detection unit is connected to said demagnetization detection unit and to said switch current detection unit, said switch current detection unit is connected to the overcurrent detection pin of said isolated driving chip, and said demagnetization detection unit is connected to the protection detection pin of said isolated driving chip.
7. The novel isolated unipolar non-stroboscopic band power factor correction LED driving power supply of claim 6, wherein the constant current detection unit comprises a third resistor and a fourth diode, one end of the third resistor is connected to the cathode of the first electrolytic capacitor, and the other end is grounded; and the anode of the fourth diode is connected with the anode of the first electrolytic capacitor, and the cathode of the fourth diode is grounded.
8. The isolated unipolar no-strobe LED driver power supply of claim 6 wherein said switch current detection unit comprises a fourth resistor, one end of said fourth resistor being connected to said overcurrent detection pin of said isolated driver chip.
9. The novel isolated unipolar non-stroboscopic power factor correction LED driving power supply of claim 6, wherein the demagnetization detection unit comprises a fifth resistor and a sixth resistor, one end of the fifth resistor is connected to the protection detection pin of the isolated driving chip and one end of the sixth resistor, and the other end is connected to the dotted end of an auxiliary winding of a transformer; the different name end of the transformer auxiliary winding is grounded, the other end of the sixth resistor is grounded, and the same name end of the transformer auxiliary winding is connected with the power supply pin of the isolation driving chip through a seventh resistor and a fifth diode.
10. The novel isolated unipolar non-stroboscopic band power factor correction LED driving power supply of claim 9, wherein one end of the seventh resistor is connected to the dotted terminal of the transformer auxiliary winding, the other end is connected to the anode of the fifth diode, and the cathode of the fifth diode is connected to the power supply pin of the isolated driving chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222065525.6U CN217985470U (en) | 2022-08-06 | 2022-08-06 | Novel keep apart monopole and do not have stroboscopic area power factor and rectify LED drive power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222065525.6U CN217985470U (en) | 2022-08-06 | 2022-08-06 | Novel keep apart monopole and do not have stroboscopic area power factor and rectify LED drive power supply |
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| Publication Number | Publication Date |
|---|---|
| CN217985470U true CN217985470U (en) | 2022-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222065525.6U Active CN217985470U (en) | 2022-08-06 | 2022-08-06 | Novel keep apart monopole and do not have stroboscopic area power factor and rectify LED drive power supply |
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| CN (1) | CN217985470U (en) |
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- 2022-08-06 CN CN202222065525.6U patent/CN217985470U/en active Active
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