CN215734944U - LED drive circuit and device based on class formula rectification filtering circuit - Google Patents
LED drive circuit and device based on class formula rectification filtering circuit Download PDFInfo
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- CN215734944U CN215734944U CN202121462370.9U CN202121462370U CN215734944U CN 215734944 U CN215734944 U CN 215734944U CN 202121462370 U CN202121462370 U CN 202121462370U CN 215734944 U CN215734944 U CN 215734944U
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Abstract
The utility model discloses an LED drive circuit based on a current-by-current rectification filter circuit, which comprises: the LED lighting system comprises an input rectifying module, a current-by-current filtering module, a high-frequency resonance module, an AC/DC conversion module and an LED lighting module; the LED lighting system comprises an input rectification module, a current-chasing filtering module, a high-frequency resonance module, an AC/DC conversion module and an LED lighting module, wherein the input rectification module is electrically connected with an alternating voltage input end, the current-chasing filtering module is electrically connected with the input rectification module, the high-frequency resonance module is electrically connected with the current-chasing filtering module, the AC/DC conversion module is electrically connected with the high-frequency resonance module, and the LED lighting module is electrically connected with the AC/DC conversion module. The LED drive control system realizes stable constant current LED drive control through the current-by-current rectification filter loop, and has high reliability and low cost.
Description
Technical Field
The utility model relates to the technical field of LED lighting, in particular to an LED driving circuit and device based on a current-by-current rectifying and filtering loop.
Background
Almost all of the currently used LED drivers adopt a switching power supply (SMIS)/Pulse Width Modulation (PWM)/field effect transistor (MO5S) integrated circuit as a main component, but the chip supply of the integrated circuit is short, the supply of goods is unstable, and the conventional production cost and the manufacturing cost of the LED lighting enterprise are seriously affected. Therefore, the utility model of an LED driving circuit based on a current-by-current rectification filter circuit is a problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The present invention provides an LED driving circuit and an LED driving device based on a current-by-current rectifying-filtering loop, aiming at the above-mentioned defects in the prior art.
In a first aspect, the utility model discloses an LED drive circuit based on a current-by-current rectification filter loop, which comprises an input rectification module, a current-by-current filter module, a high-frequency resonance module, an AC/DC conversion module and an LED illumination module; the LED lighting system comprises an input rectification module, a current-chasing filtering module, a high-frequency resonance module, an AC/DC conversion module and an LED lighting module, wherein the input rectification module is electrically connected with an alternating voltage input end, the current-chasing filtering module is electrically connected with the input rectification module, the high-frequency resonance module is electrically connected with the current-chasing filtering module, the AC/DC conversion module is electrically connected with the high-frequency resonance module, and the LED lighting module is electrically connected with the AC/DC conversion module.
Preferably, the input rectifying module includes a fuse, a voltage dependent resistor, a rectifying bridge, a first inductor, a second inductor, a first resistor, a first capacitor, and a second capacitor; a first end of the fuse is electrically connected with a live wire end of the alternating current input voltage end, a second end of the fuse is electrically connected with a first end of the first capacitor, a first end of the first inductor and a first end of the piezoresistor respectively, a second end of the first capacitor is electrically connected with a zero line end of the alternating current input voltage end, a first end of the second inductor and a second end of the piezoresistor respectively, a second end of the first inductor is electrically connected with a first end of the second capacitor and a first end of the rectifier bridge respectively, a second end of the second capacitor is electrically connected with a second end of the second inductor and a second end of the rectifier bridge respectively, and a third end of the rectifier bridge is electrically connected with a first end of the first resistor, the current-chasing filter module, the high-frequency resonance module and the AC/DC conversion module respectively, and the fourth end of the rectifier bridge is electrically connected with the second end of the first resistor, the current-stepping filtering module, the high-frequency resonance module and the AC/DC conversion module respectively.
Preferably, the stream-by-stream filter module includes a third capacitor, a fourth capacitor, a first diode, a second diode, and a third diode; a first end of the third capacitor is electrically connected to the input rectifying module, a first end of the first diode, the high-frequency resonance module and the AC/DC conversion module, a second end of the third capacitor is electrically connected to a first end of the second diode and a first end of the third diode, a second end of the first diode is electrically connected to a second end of the third diode and a first end of the fourth capacitor, and a second end of the second diode is electrically connected to a second end of the fourth capacitor, the high-frequency resonance module and the AC/DC conversion module.
Preferably, the high-frequency resonance module comprises a first triode, a second triode, an avalanche diode, a pulse transformer, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a fifth capacitor, a sixth capacitor, a seventh capacitor and a third inductor; a first end of the second resistor is electrically connected to the valley-fill filter module, a first end of the third resistor, a first end of the fifth capacitor, a first end of the sixth capacitor, and a collector of the first transistor, a second end of the second resistor is electrically connected to a first end of the avalanche diode and a first end of the seventh capacitor, a base of the first transistor is electrically connected to a first end of the fourth resistor, a second end of the fourth resistor is electrically connected to the pulse transformer, an emitter of the first transistor is electrically connected to a first end of the fifth resistor, a second end of the third resistor is electrically connected to a first end of the fifth capacitor, a first end of the third inductor, and the pulse transformer, a second end of the sixth capacitor is electrically connected to the AC/DC conversion module, and a second end of the avalanche diode is electrically connected to a first end of the sixth resistor and a base of the second transistor, respectively The second end of the fifth resistor is electrically connected with the collector of the second triode, the emitter of the second triode is electrically connected with the first end of the seventh resistor, the second end of the sixth resistor is electrically connected with the pulse light transformer, the second end of the third inductor is respectively electrically connected with the AC/DC conversion module and the LED lighting module, the second end of the seventh capacitor is respectively electrically connected with the second end of the seventh resistor and the pulse light transformer, the first end of the fourth diode is electrically connected with the second end of the second resistor, and the second end of the fourth diode is electrically connected with the second end of the fifth resistor.
Preferably, the AC/DC conversion module includes a fifth diode, a sixth diode, a seventh diode, an eighth diode, and an eighth capacitor; a first end of the fifth diode is electrically connected with a first end of the sixth diode and the LED lighting module, a second end of the fifth diode is electrically connected with a first end of the seventh diode, a first end of the eighth capacitor is electrically connected with the high-frequency resonance module, a second end of the eighth capacitor is electrically connected with a second end of the sixth diode and a first end of the eighth diode, a first end of the eighth diode is electrically connected with the high-frequency resonance module, and a second end of the seventh diode is electrically connected with a second end of the eighth diode and the LED lighting module.
In a second aspect, the present invention further discloses a device, including the LED driving circuit based on the current-by-current rectifying-filtering loop of the first aspect.
The LED drive circuit based on the current-by-current rectification filter circuit has the following beneficial effects that: the LED lighting system comprises an input rectifying module, a current-by-current filtering module, a high-frequency resonance module, an AC/DC conversion module and an LED lighting module; the LED lighting system comprises an input rectification module, a current-chasing filtering module, a high-frequency resonance module, an AC/DC conversion module and an LED lighting module, wherein the input rectification module is electrically connected with an alternating voltage input end, the current-chasing filtering module is electrically connected with the input rectification module, the high-frequency resonance module is electrically connected with the current-chasing filtering module, the AC/DC conversion module is electrically connected with the high-frequency resonance module, and the LED lighting module is electrically connected with the AC/DC conversion module. The power supply alternating voltage passes through the input rectification module, and the input rectification module converts the alternating voltage into direct voltage; the current-by-current filtering module performs current-by-current high-power factor filtering processing on the direct-current voltage and then supplies power to the high-frequency resonance module; and the high-frequency output voltage current of the high-frequency resonance module is subjected to high-frequency bridge type AC/DC conversion through the AC/DC conversion module and then outputs direct current voltage current to drive the light-emitting LEDs in the LED illumination module to normally work. The LED drive control circuit realizes stable constant current LED drive control through the current-by-current rectification filter loop, effectively replaces an LED driver consisting of a conventional constant voltage integrated circuit, and has high reliability and low cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only part of the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts according to the accompanying drawings:
fig. 1 is a schematic block diagram of an LED driving circuit based on a current-by-current rectifying and filtering circuit according to a preferred embodiment of the present invention;
fig. 2 is a circuit diagram of an LED driving circuit based on a current-by-current rectifying-filtering loop according to a preferred embodiment of the present invention;
fig. 3 is a schematic winding diagram of a pulse transformer and an output inductor based on a current-by-current rectifying-filtering loop according to a preferred embodiment of the utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.
Example one
Fig. 1 shows a preferred embodiment of the present invention, which includes an input rectifying module 1, a current-by-current filtering module 2, a high-frequency resonance module 3, an AC/DC conversion module 4, and an LED lighting module 5; the input rectifying module 1 is electrically connected with an alternating voltage input end, the current-chasing filtering module is electrically connected with the input rectifying module 1, the high-frequency resonance module 3 is electrically connected with the current-chasing filtering module, the AC/DC conversion module 4 is electrically connected with the high-frequency resonance module 3, and the LED illuminating module 5 is electrically connected with the AC/DC conversion module 4. The power supply alternating voltage passes through the input rectification module 1, and the input rectification module 1 converts the alternating voltage into direct voltage; the current-by-current filtering module 2 performs current-by-current high-power factor filtering processing on the direct-current voltage and then supplies power to the high-frequency resonance module 3; the high-frequency output voltage current of the high-frequency resonance module 3 is subjected to high-frequency bridge type AC/DC conversion through the AC/DC conversion module 4, and then the direct current voltage current is output to drive the light-emitting LEDs in the LED illumination module 5 to normally work. The LED drive control circuit realizes stable constant current LED drive control through the current-by-current rectification filter loop, effectively replaces an LED driver consisting of a conventional constant voltage integrated circuit, and has high reliability and low cost.
Preferably, the input rectifying module 1 includes a fuse FS, a voltage dependent resistor RV, a rectifying bridge DB1, a first inductor L1, a second inductor L2, a first resistor R1, a first capacitor C1, and a second capacitor C2; a first end of the fuse FS is electrically connected to a live wire end of the AC input voltage end, a second end of the fuse FS is electrically connected to a first end of the first capacitor C1, a first end of the first inductor L1 and a first end of the varistor RV, a second end of the first capacitor C1 is electrically connected to a neutral wire end of the AC voltage input end, a first end of the second inductor L2 and a second end of the varistor RV, a second end of the first inductor L1 is electrically connected to a first end of the second capacitor C2 and a first end of the rectifier bridge DB1, a second end of the second capacitor C2 is electrically connected to a second end of the second inductor L2 and a second end of the rectifier bridge DB1, and a third end of the rectifier bridge DB1 is electrically connected to a first end of the first resistor R1, the free-flow filter module 2, the high-frequency resonance module 3 and the AC/DC conversion module 4, a fourth terminal of the rectifier bridge DB1 is electrically connected to the second terminal of the first resistor R1, the valley-fill filter module 2, the high-frequency resonance module 3, and the AC/DC conversion module 4, respectively.
Preferably, the stream-by-stream filter module 2 comprises a third capacitor C3, a fourth capacitor C4, a first diode D3, a second diode D1 and a third diode D2; a first end of the third capacitor C3 is electrically connected to the input rectifying module 1, the first end of the first diode D3, the high-frequency resonant module 3, and the AC/DC conversion module 4, a second end of the third capacitor C3 is electrically connected to the first end of the second diode D1 and the first end of the third diode D2, a second end of the first diode D3 is electrically connected to the second end of the third diode D2 and the first end of the fourth capacitor C4, and a second end of the second diode D1 is electrically connected to the second end of the fourth capacitor C4, the high-frequency resonant module 3, and the AC/DC conversion module 4. It is understood that the third capacitor C3, the third diode D2 and the fourth capacitor C4 are connected in series, and the dc voltage output 1 via the input rectifying module is charged in series via the third capacitor C3, the third diode D2 and the fourth capacitor C4 respectively; the third capacitor C3 and the second diode D1, and the first diode D3 and the fourth capacitor C4 are connected in parallel to realize parallel discharge, so that the third capacitor C3, the third diode D2 and the fourth capacitor C4 perform a current-stepping high power factor filtering process on the dc voltage output by the input rectification module 1 through series charging and parallel discharging.
Preferably, referring to fig. 2 and 3, the high-frequency resonance module 3 includes a first transistor Q1, a second transistor Q2, an avalanche diode DB, a pulse transformer, a second resistor R2, a third resistor R3, a fourth resistor R6, a fifth resistor R4, a sixth resistor R7, a seventh resistor R5, a fifth capacitor C6, a sixth capacitor C7, a seventh capacitor C5, a fourth diode D8, and a third inductor L5; a first end of the second resistor is electrically connected to the valley-fill filter module 2, a first end of the third resistor R3, a first end of the fifth capacitor C6, a first end of the sixth capacitor C7, and a collector of the first transistor Q1, a second end of the second resistor R2 is electrically connected to the first end of the avalanche diode DB and the first end of the seventh capacitor C5, respectively, a base of the first transistor Q1 is electrically connected to the first end of the fourth resistor R6, a second end of the fourth resistor R6 is electrically connected to the pulse transformer, an emitter of the first transistor Q1 is electrically connected to the first end of the fifth resistor R4, a second end of the third resistor R3 is electrically connected to the first end of the fifth capacitor C6, the first end of the third inductor L5, and the pulse transformer, respectively, and a second end of the sixth capacitor C7 is electrically connected to the AC/DC conversion module 4, a second end of the avalanche diode DB is electrically connected to a first end of the sixth resistor R7 and a base of the second transistor Q2, respectively, a second end of the fifth resistor R4 is electrically connected to a collector of the second transistor Q2, an emitter of the second transistor Q2 is electrically connected to a first end of the seventh resistor R5, a second end of the sixth resistor R7 is electrically connected to the pulse light transformer, a second end of the third inductor L5 is electrically connected to the AC/DC conversion module 4 and the LED lighting module 5, respectively, a second end of the seventh capacitor C5 is electrically connected to a second end of the seventh resistor R5 and the pulse light transformer, a first end of the fourth diode D8 is electrically connected to a second end of the second resistor R2, and a second end of the fourth diode D8 is electrically connected to a second end of the fifth resistor R4. It can be understood that, in the present embodiment, the second resistor R2, the fifth capacitor C6 and the avalanche diode DB constitute an integration circuit unit; the inductor L3, the inductor L4 and the third inductor L5 form a pulse transformer; when the integrated voltage is greater than the turn-on voltage of the second transistor Q2, the second transistor Q2 is turned on, the current flows through the same-name terminal of the pulse transformer, and the pulse transformer is turned on, so that the third inductor L5 as an output inductor has current flowing through it; the output current is fed back to the first triode Q1, the first triode Q1 is closed, the integral circuit unit is not acted due to the blocking effect of the fourth diode D8, the second triode Q2 is conducted again, and therefore high-frequency resonance is conducted on the output voltage, the high-frequency voltage is output, and high-order harmonics are filtered.
Preferably, the AC/DC conversion module 4 includes a fifth diode D4, a sixth diode D6, a seventh diode D5, an eighth diode D7, and an eighth capacitor C8; a first end of the fifth diode D4 is electrically connected to the first end of the sixth diode D6 and the LED lighting module 5, a second end of the fifth diode D4 is electrically connected to the first end of the seventh diode D5, a first end of the eighth capacitor C8 is electrically connected to the high-frequency resonance module 3, a second end of the eighth capacitor C8 is electrically connected to the second end of the sixth diode D6 and the first end of the eighth diode D7, a first end of the eighth diode D7 is electrically connected to the high-frequency resonance module 3, and a second end of the seventh diode D5 is electrically connected to the second end of the eighth diode D7 and the LED lighting module 5. It can be understood that the AC/DC conversion module is configured to perform high-frequency bridge AC/DC conversion on the high-frequency voltage output by the high-frequency resonance module 3 to obtain a direct-current voltage, and the direct-current voltage drives the LED lighting module 5 to normally operate.
Example two
In summary, the LED driving circuit based on the current-by-current rectifying and filtering loop provided by the present invention includes an input rectifying module 1, a current-by-current filtering module 2, a high frequency resonance module 3, an AC/DC conversion module 4, and an LED lighting module 5; the input rectifying module 1 is electrically connected with an alternating voltage input end, the current-chasing filtering module is electrically connected with the input rectifying module 1, the high-frequency resonance module 3 is electrically connected with the current-chasing filtering module, the AC/DC conversion module 4 is electrically connected with the high-frequency resonance module 3, and the LED illuminating module 5 is electrically connected with the AC/DC conversion module 4. The power supply alternating voltage passes through the input rectification module 1, and the input rectification module 1 converts the alternating voltage into direct voltage; the current-by-current filtering module 2 performs current-by-current high-power factor filtering processing on the direct-current voltage and then supplies power to the high-frequency resonance module 3; the high-frequency output voltage current of the high-frequency resonance module 3 is subjected to high-frequency bridge type AC/DC conversion through the AC/DC conversion module 4, and then the direct current voltage current is output to drive the light-emitting LEDs in the LED illumination module 5 to normally work. The LED drive control circuit realizes stable constant current LED drive control through the current-by-current rectification filter loop, effectively replaces an LED driver consisting of a conventional constant voltage integrated circuit, and has high reliability and low cost.
The LED driving circuit and the LED driving device based on the current-by-current rectifying-filtering loop provided by the present invention are introduced in detail, and a specific example is applied in the present document to explain the principle and the implementation of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be a change in the specific implementation and application scope, and in summary, the content of the present specification is only an implementation of the present invention, and not a limitation to the scope of the present invention, and all equivalent structures or equivalent flow transformations made by the content of the present specification and the attached drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention. And should not be construed as limiting the utility model.
Claims (6)
1. An LED drive circuit based on a current-by-current rectification filter loop is characterized by comprising: the LED lighting system comprises an input rectifying module, a current-by-current filtering module, a high-frequency resonance module, an AC/DC conversion module and an LED lighting module; the LED lighting system comprises an input rectification module, a current-chasing filtering module, a high-frequency resonance module, an AC/DC conversion module and an LED lighting module, wherein the input rectification module is electrically connected with an alternating voltage input end, the current-chasing filtering module is electrically connected with the input rectification module, the high-frequency resonance module is electrically connected with the current-chasing filtering module, the AC/DC conversion module is electrically connected with the high-frequency resonance module, and the LED lighting module is electrically connected with the AC/DC conversion module.
2. The LED driving circuit based on the current-by-current rectifying and filtering loop according to claim 1, wherein the input rectifying module comprises a fuse, a voltage dependent resistor, a rectifying bridge, a first inductor, a second inductor, a first resistor, a first capacitor and a second capacitor; a first end of the fuse is electrically connected with a live wire end of the alternating current input voltage end, a second end of the fuse is electrically connected with a first end of the first capacitor, a first end of the first inductor and a first end of the piezoresistor respectively, a second end of the first capacitor is electrically connected with a zero line end of the alternating current input voltage end, a first end of the second inductor and a second end of the piezoresistor respectively, a second end of the first inductor is electrically connected with a first end of the second capacitor and a first end of the rectifier bridge respectively, a second end of the second capacitor is electrically connected with a second end of the second inductor and a second end of the rectifier bridge respectively, and a third end of the rectifier bridge is electrically connected with a first end of the first resistor, the current-chasing filter module, the high-frequency resonance module and the AC/DC conversion module respectively, and the fourth end of the rectifier bridge is electrically connected with the second end of the first resistor, the current-stepping filtering module, the high-frequency resonance module and the AC/DC conversion module respectively.
3. The LED driving circuit based on the current-by-current rectifying and filtering loop of claim 1, wherein the current-by-current filtering module comprises a third capacitor, a fourth capacitor, a first diode, a second diode and a third diode; a first end of the third capacitor is electrically connected to the input rectifying module, a first end of the first diode, the high-frequency resonance module and the AC/DC conversion module, a second end of the third capacitor is electrically connected to a first end of the second diode and a first end of the third diode, a second end of the first diode is electrically connected to a second end of the third diode and a first end of the fourth capacitor, and a second end of the second diode is electrically connected to a second end of the fourth capacitor, the high-frequency resonance module and the AC/DC conversion module.
4. The LED driving circuit based on the valley-fill rectifying and filtering loop as claimed in claim 1, wherein the HF resonant module comprises a first transistor, a second transistor, an avalanche diode, a pulse transformer, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a fifth capacitor, a sixth capacitor, a seventh capacitor and a third inductor; a first end of the second resistor is electrically connected to the valley-fill filter module, a first end of the third resistor, a first end of the fifth capacitor, a first end of the sixth capacitor, and a collector of the first transistor, a second end of the second resistor is electrically connected to a first end of the avalanche diode and a first end of the seventh capacitor, a base of the first transistor is electrically connected to a first end of the fourth resistor, a second end of the fourth resistor is electrically connected to the pulse transformer, an emitter of the first transistor is electrically connected to a first end of the fifth resistor, a second end of the third resistor is electrically connected to a first end of the fifth capacitor, a first end of the third inductor, and the pulse transformer, a second end of the sixth capacitor is electrically connected to the AC/DC conversion module, and a second end of the avalanche diode is electrically connected to a first end of the sixth resistor and a base of the second transistor, respectively The second end of the fifth resistor is electrically connected with the collector of the second triode, the emitter of the second triode is electrically connected with the first end of the seventh resistor, the second end of the sixth resistor is electrically connected with the pulse light transformer, the second end of the third inductor is respectively electrically connected with the AC/DC conversion module and the LED lighting module, the second end of the seventh capacitor C5 is respectively electrically connected with the second end of the seventh resistor R5 and the pulse light transformer, the first end of the fourth diode is electrically connected with the second end of the second resistor, and the second end of the fourth diode is electrically connected with the second end of the fifth resistor.
5. The LED driving circuit based on the current-by-current rectifying and filtering loop as claimed in claim 1, wherein the AC/DC conversion module comprises a fifth diode, a sixth diode, a seventh diode, an eighth diode and a seventh capacitor; a first end of the fifth diode is electrically connected with a first end of the sixth diode and the LED lighting module, a second end of the fifth diode is electrically connected with a first end of the seventh diode, a first end of the eighth capacitor is electrically connected with the high-frequency resonance module, a second end of the eighth capacitor is electrically connected with a second end of the sixth diode and a first end of the eighth diode, a first end of the eighth diode is electrically connected with the high-frequency resonance module, and a second end of the seventh diode is electrically connected with a second end of the eighth diode and the LED lighting module.
6. An apparatus comprising a LED driving circuit based on a valley-fill rectifying and filtering loop as claimed in any one of claims 1 to 5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121462370.9U CN215734944U (en) | 2021-06-29 | 2021-06-29 | LED drive circuit and device based on class formula rectification filtering circuit |
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| CN202121462370.9U CN215734944U (en) | 2021-06-29 | 2021-06-29 | LED drive circuit and device based on class formula rectification filtering circuit |
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| CN215734944U true CN215734944U (en) | 2022-02-01 |
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