CN218998327U - Dimming non-isolated LED driving power supply - Google Patents
Dimming non-isolated LED driving power supply Download PDFInfo
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- CN218998327U CN218998327U CN202123331299.3U CN202123331299U CN218998327U CN 218998327 U CN218998327 U CN 218998327U CN 202123331299 U CN202123331299 U CN 202123331299U CN 218998327 U CN218998327 U CN 218998327U
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Abstract
The utility model discloses a dimming non-isolated LED driving power supply, which is characterized in that: the power supply comprises a rectifier connected with an external power supply, wherein the output end of the rectifier is connected with a filter circuit, the output end of the filter circuit is connected with an absorption circuit, and the output end of the absorption circuit is connected with a first constant current driving circuit and a second constant current driving circuit in parallel. The utility model has the advantages of simple structure, convenient adjustment, no stroboscopic effect in the dimming process, good dimming linearity and high dimming resolution, and can meet the requirements of people on the visual effect of lighting space.
Description
Technical Field
The utility model relates to the field of driving power supplies, in particular to a dimming non-isolated LED driving power supply.
Background
LED (Light Emitting Diode), also called light emitting diode, is a solid state semiconductor device capable of converting electrical energy into visible light, which can directly convert electricity into light. The heart of the LED is a semiconductor wafer, one end of the wafer is attached to a support, the other end is a negative electrode, and the other end is connected with the positive electrode of a power supply, so that the whole wafer is encapsulated by epoxy resin. The LED lamp has the advantages of energy conservation, environmental protection, multiple changes, long service life and the like, and is widely applied to the field of indoor and outdoor illumination.
Current LED driving power supplies are often required to have dimming functions. The most widely used at present are 0-10V dimming and PWM dimming. When dimming a plurality of LEDs, a centralized dimmer outputs 0-10V analog signals or PWM signals, and simultaneously dimming a plurality of lamps connected on the same line.
The existing LED driving power supply has the defects of design, so that stroboscopic is easy to occur in the dimming process, and the requirements of users cannot be met.
Therefore, the existing dimming non-isolated LED driving power supply needs to be further improved.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provides a dimming non-isolated LED driving power supply which is simple in structure, convenient to adjust and free of stroboscopic in the dimming process.
In order to achieve the above purpose, the present utility model adopts the following scheme: the utility model provides a non-isolation LED drive power supply adjusts luminance which characterized in that: the power supply comprises a rectifier connected with an external power supply, wherein the output end of the rectifier is connected with a filter circuit, the output end of the filter circuit is connected with an absorption circuit, and the output end of the absorption circuit is connected with a first constant current driving circuit and a second constant current driving circuit in parallel.
As another improvement of the dimming non-isolated LED driving power supply, a fuse F1 and a current-limiting resistor R6 are sequentially connected in series between the positive electrode of the external power supply and a rectifier, a current-limiting resistor R7 is connected in series between the negative electrode of the external power supply and the rectifier, and a piezoresistor VR1 and a capacitor CX1 are connected in parallel on the rectifier.
As another improvement of the dimming non-isolated LED driving power supply, the filter circuit comprises an inductor L1 connected in series to the positive electrode output end of a rectifier, a resistor R16 is connected in parallel to two ends of the inductor L1, a capacitor C2 is connected in parallel between the input end of the inductor L1 and the negative electrode of the rectifier, a capacitor C8 is connected in parallel between the output end of the inductor L1 and the negative electrode of the rectifier, and one ends of the capacitor C2 and the capacitor C8 are grounded.
As another improvement of the dimming non-isolated LED driving power supply, the absorption circuit comprises a resistor 13 connected to the output end of an inductor L1, a capacitor C7 is connected in series to the resistor 13, one end of the capacitor C7 is grounded, two ends of the resistor 13 are respectively connected with a resistor 14 and a resistor 15 in parallel, and the output end of the inductor L1 is connected with the positive electrode of a port J2.
As another improvement of the dimming non-isolated LED driving power supply, the first constant current driving circuit comprises a first constant current driving chip U1, wherein the output end of an inductor L1 is connected with a resistor R12 and a resistor R13 in series in sequence and then is connected with a VS pin of the first constant current driving chip U1, a resistor R5 is connected to the Tonmax pin of the first constant current driving chip U1, one end of the resistor R5 is grounded, the GND pin of the first constant current driving chip U1 is grounded, a resistor RS1 is connected to the CS pin of the first constant current driving chip U1, one end of the resistor RS1 is grounded, two ends of the resistor RS1 are connected with a resistor RS2 in parallel, the Drain pin of the first constant current driving chip U1 is connected with a diode D1, the negative electrode of the diode D1 is connected with the negative electrode of a port J2, an inductor L2 is connected between the output end of the inductor L1 and the Drain pin of the first constant current driving chip U1, a capacitor C1 is connected with the output end of the inductor L1 in series, and then the capacitor C1 is connected with the negative electrode of the capacitor C4 in series with the first constant current driving chip U1, and the negative electrode of the capacitor C1 is connected with the negative electrode of the capacitor P1 is connected with the negative electrode of the first constant current driving chip J4 in series.
As another improvement of the dimming non-isolated LED driving power supply, the second constant current driving circuit comprises a second constant current driving chip U2, wherein the output end of an inductor L1 is connected with a resistor R9 and a resistor R10 in series in sequence and then is connected with a VS pin of the second constant current driving chip U2, a resistor R12 is connected to the Tonmax pin of the second constant current driving chip U2, one end of the resistor R12 is grounded, the GND pin of the second constant current driving chip U2 is grounded, a resistor RS3 is connected to the CS pin of the second constant current driving chip U2, one end of the resistor RS3 is grounded, two ends of the resistor RS3 are connected with a resistor RS4 in parallel, the Drain pin of the second constant current driving chip U2 is connected with a diode D2, the negative electrode of the diode D2 is connected with the negative electrode of a port J2, an inductor L3 is connected between the output end of the inductor L1 and the Drain pin of the second constant current driving chip U2, a capacitor C3 is connected with the output end of the inductor L1 in series, and then the capacitor C3 is connected with the negative electrode of the capacitor C2 in parallel with the capacitor C5 and then is connected with the negative electrode of the second constant current driving chip U2 in series, and the capacitor C is connected with the negative electrode of the capacitor P11 of the second constant current driving chip is connected with the negative electrode of the port J2 in series.
As another improvement of the dimming non-isolated LED driving power supply, a capacitor C6 is connected to the output end of the inductor L1, and one end of the capacitor C6 is grounded.
As another improvement of the dimming non-isolated LED driving power supply, the dimming non-isolated LED driving power supply further comprises a port J1, wherein the positive electrode of an external power supply is connected with the positive electrode of the port J1, the negative electrode of the external power supply is connected with the negative electrode of the port J1, the input end of the fuse F1 is connected with the positive electrode of the port J1, and the input end of the current limiting resistor R7 is connected with the negative electrode of the port J1.
As another improvement of the dimming non-isolated LED driving power supply of the present utility model, a silicon controlled dimmer is connected to the port J1.
In summary, compared with the prior art, the utility model has the following beneficial effects:
the utility model has simple structure, convenient adjustment and no stroboscopic effect in the dimming process.
Drawings
Fig. 1 is a schematic diagram of the present utility model.
Description of the embodiments
The above and further technical features and advantages of the present utility model are described in more detail below with reference to the accompanying drawings.
Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.
It should be noted that, in the description of the present utility model, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.
As shown in FIG. 1, the dimming non-isolated LED driving power supply comprises a rectifier connected with an external power supply, wherein the output end of the rectifier is connected with a filter circuit, the output end of the filter circuit is connected with an absorption circuit, and the output end of the absorption circuit is connected with a first constant current driving circuit and a second constant current driving circuit in parallel.
According to the utility model, an external alternating current power supply is rectified by the rectifier and then becomes a direct current, then becomes a smooth direct current by the filter circuit, and absorbs abrupt voltage by the absorption circuit, so that more stable and smooth voltage is output, and the output power can be effectively improved by the two parallel-connected first constant current driving circuits and the second constant current driving circuits.
In the utility model, the first constant current driving circuit and the second constant current driving circuit both support the silicon controlled rectifier dimmer to carry out dimming.
The utility model has simple structure, convenient adjustment and no stroboscopic effect in the dimming process.
The utility model is characterized in that a fuse F1 and a current-limiting resistor R6 are sequentially connected in series between the positive electrode of an external power supply and a rectifier, a current-limiting resistor R7 is connected in series between the negative electrode of the external power supply and the rectifier, and a piezoresistor VR1 and a capacitor CX1 are connected in parallel on the rectifier. According to the utility model, the fuse F1 can play a role in short-circuit protection, the piezoresistor VR1 can play a role in lightning protection, and the capacitor CX1 can effectively absorb surge power supply and current.
The rectifier DB1 in the present utility model is a full bridge rectifier.
The filter circuit comprises an inductor L1 connected in series to the positive electrode output end of a rectifier, a resistor R16 is connected in parallel to two ends of the inductor L1, a capacitor C2 is connected in parallel between the input end of the inductor L1 and the negative electrode of the rectifier, a capacitor C8 is connected in parallel between the output end of the inductor L1 and the negative electrode of the rectifier, and one ends of the capacitor C2 and the capacitor C8 are grounded.
In the present utility model, the pi-type filter circuit composed of the capacitor C2, the capacitor C8, and the inductor L1 can change the direct current output from the rectifier DB1 into a smooth direct current.
The absorption circuit comprises a resistor 13 connected to the output end of an inductor L1, a capacitor C7 is connected in series to the resistor 13, one end of the capacitor C7 is grounded, two ends of the resistor 13 are respectively connected in parallel with a resistor 14 and a resistor 15, and the output end of the inductor L1 is connected with the positive electrode of a port J2.
According to the utility model, the absorption network formed by the resistor 13, the resistor 14, the resistor 15 and the capacitor C7 can effectively absorb abrupt voltage in the circuit, so that more stable and smoother voltage is output.
The first constant current driving circuit comprises a first constant current driving chip U1, wherein the output end of an inductor L1 is connected with a resistor R12 and a resistor R13 in series in sequence and then is connected with a VS pin of the first constant current driving chip U1, a resistor R5 is connected to the Tonmax pin of the first constant current driving chip U1, one end of the resistor R5 is grounded, the GND pin of the first constant current driving chip U1 is grounded, a resistor RS1 is connected to the CS pin of the first constant current driving chip U1, one end of the resistor RS1 is grounded, two ends of the resistor RS1 are connected with a resistor RS2 in parallel, the cathode of the diode D1 is connected with the cathode of a port J2, an inductor L2 is connected between the output end of the inductor L1 and the Drain pin of the first constant current driving chip U1 in series, a capacitor C1 is connected between the two ends of the capacitor C1 and the output end of the inductor L1 in series, a capacitor C4 and the resistor R1 are connected with the cathode of the first constant current driving chip U1 in parallel, and the cathode of the capacitor C1 is connected with the cathode of the first constant current driving chip U1 in series, and the cathode of the capacitor is connected with the cathode of the first constant current driving chip J2.
The second constant current driving circuit comprises a second constant current driving chip U2, wherein the output end of an inductor L1 is connected with a resistor R9 and a resistor R10 in series in sequence and then is connected with a VS pin of the second constant current driving chip U2, a resistor R12 is connected to the Tonmax pin of the second constant current driving chip U2, one end of the resistor R12 is grounded, the GND pin of the second constant current driving chip U2 is grounded, a resistor RS3 is connected to the CS pin of the second constant current driving chip U2, one end of the resistor RS3 is grounded, two ends of the resistor RS3 are connected with a resistor RS4 in parallel, the cathode of the diode D2 is connected with the cathode of a port J2, an inductor L3 is connected between the output end of the inductor L1 and the Drain pin of the second constant current driving chip U2 in series, two ends of the capacitor C3 are connected with a capacitor C5 and a resistor R8 respectively, and the cathode of the second constant current driving chip U2 is connected with the cathode of the port J2 in series, and the cathode of the second constant current driving chip is connected with the cathode of the port J2 in series.
The output end of the inductor L1 is connected with a capacitor C6, and one end of the capacitor C6 is grounded.
In the utility model, the first constant current drive circuit and the second constant current drive circuit are used in parallel, so that the output power is effectively increased.
The utility model also comprises a port J1, the positive electrode of the external power supply is connected with the positive electrode of the port J1, the negative electrode of the external power supply is connected with the negative electrode of the port J1, the input end of the fuse F1 is connected with the positive electrode of the port J1, and the input end of the current limiting resistor R7 is connected with the negative electrode of the port J1.
In the utility model, a silicon controlled rectifier dimmer is connected to the port J1.
The silicon controlled rectifier dimming LED driving power supply circuit disclosed by the utility model has the advantages of no flicker in dimming, good dimming linearity, high dimming resolution and strong compatibility of a dimmer, and meets the requirements of people on the visual effect of lighting space.
The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a non-isolation LED drive power supply adjusts luminance which characterized in that: the power supply comprises a rectifier connected with an external power supply, wherein the output end of the rectifier is connected with a filter circuit, the output end of the filter circuit is connected with a buffer circuit, and the output end of the buffer circuit is connected with a first constant current driving circuit and a second constant current driving circuit in parallel.
2. The dimming non-isolated LED driver power supply of claim 1, wherein: the fuse F1 and the current limiting resistor R6 are sequentially connected in series between the positive electrode of the external power supply and the rectifier, the current limiting resistor R7 is connected in series between the negative electrode of the external power supply and the rectifier, and the voltage dependent resistor VR1 and the capacitor CX1 are connected in parallel to the rectifier.
3. The dimming non-isolated LED driver power supply of claim 1, wherein: the filter circuit comprises an inductor L1 connected in series to the positive electrode output end of the rectifier, a resistor R16 is connected in parallel to the two ends of the inductor L1, a capacitor C2 is connected in parallel between the input end of the inductor L1 and the negative electrode of the rectifier, a capacitor C8 is connected in parallel between the output end of the inductor L1 and the negative electrode of the rectifier, and one ends of the capacitor C2 and the capacitor C8 are grounded.
4. A dimming non-isolated LED driver power supply as claimed in claim 3, wherein: the buffer circuit comprises a resistor 13 connected to the output end of an inductor L1, a capacitor C7 is connected in series to the resistor 13, one end of the capacitor C7 is grounded, a resistor 14 and a resistor 15 are respectively connected in parallel to the two ends of the resistor 13, and the output end of the inductor L1 is connected with the positive electrode of a port J2.
5. A dimming non-isolated LED driver power supply as claimed in claim 3, wherein: the first constant current driving circuit comprises a first constant current driving chip U1, wherein the output end of an inductor L1 is connected with a resistor R12 and a resistor R13 in series in sequence and then is connected with a VS pin of the first constant current driving chip U1, a resistor R5 is connected on a Tonmax pin of the first constant current driving chip U1, one end of the resistor R5 is grounded, a GND pin of the first constant current driving chip U1 is grounded, a resistor RS1 is connected on a CS pin of the first constant current driving chip U1, one end of the resistor RS1 is grounded, two ends of the resistor RS1 are connected with a resistor RS2 in parallel, the cathode of the diode D1 is connected with the cathode of a port J2, an inductor L2 is connected between the output end of the inductor L1 and the Drain pin of the first constant current driving chip U1 in series, a capacitor C1 is connected between the diode D1 and the output end of the inductor L1 in series, two ends of the capacitor C1 are connected with a resistor R1 in parallel respectively, and the capacitor C4 and the resistor R1 are connected with the cathode of the first constant current driving chip U1 in series with the cathode of the first constant current driving chip U1, and the cathode of the first constant current driving chip is connected with the cathode of the first constant current driving chip U2 in series.
6. A dimming non-isolated LED driver power supply as claimed in claim 3, wherein: the second constant current driving circuit comprises a second constant current driving chip U2, the output end of an inductor L1 is connected with a resistor R9 and a resistor R10 in series in sequence and then is connected with a VS pin of the second constant current driving chip U2, a resistor R12 is connected on a Tonmax pin of the second constant current driving chip U2, one end of the resistor R12 is grounded, a GND pin of the second constant current driving chip U2 is grounded, a resistor RS3 is connected on a CS pin of the second constant current driving chip U2, one end of the resistor RS3 is grounded, two ends of the resistor RS3 are connected with a resistor RS4 in parallel, the cathode of the diode D2 is connected with the cathode of a port J2, an inductor L3 is connected between the output end of the inductor L1 and the Drain pin of the second constant current driving chip U2 in series, two ends of the capacitor C3 are connected with a capacitor C5 and a resistor R8 in parallel respectively, and the cathode of the second constant current driving chip U2 is connected with the cathode of the port J2 in series.
7. The dimming non-isolated LED driver power supply of claim 6, wherein: a capacitor C6 is connected to the output end of the inductor L1, and one end of the capacitor C6 is grounded.
8. A dimming non-isolated LED drive power supply as claimed in claim 2, wherein: the high-voltage power supply further comprises a port J1, the positive electrode of the external power supply is connected with the positive electrode of the port J1, the negative electrode of the external power supply is connected with the negative electrode of the port J1, the input end of the fuse F1 is connected with the positive electrode of the port J1, and the input end of the current-limiting resistor R7 is connected with the negative electrode of the port J1.
9. The dimming non-isolated LED driver power supply of claim 8, wherein: a triac dimmer is connected to the port J1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123331299.3U CN218998327U (en) | 2021-12-28 | 2021-12-28 | Dimming non-isolated LED driving power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123331299.3U CN218998327U (en) | 2021-12-28 | 2021-12-28 | Dimming non-isolated LED driving power supply |
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| CN218998327U true CN218998327U (en) | 2023-05-09 |
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| CN202123331299.3U Active CN218998327U (en) | 2021-12-28 | 2021-12-28 | Dimming non-isolated LED driving power supply |
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- 2021-12-28 CN CN202123331299.3U patent/CN218998327U/en active Active
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