CN212013108U - LED buck-boost driving circuit - Google Patents
LED buck-boost driving circuit Download PDFInfo
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- CN212013108U CN212013108U CN202020842354.1U CN202020842354U CN212013108U CN 212013108 U CN212013108 U CN 212013108U CN 202020842354 U CN202020842354 U CN 202020842354U CN 212013108 U CN212013108 U CN 212013108U
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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
Abstract
The utility model discloses a LED buck-boost driving circuit, which comprises a buck-boost module, which is respectively connected with an external power supply and a load electricity; the buck-boost module comprises a chip U10, a MOS tube Q5, a MOS tube Q6, an inductor L3, a detection module, a diode D7 and a diode D8 which are connected in parallel, a diode D9 and a diode D10 which are connected in parallel, and a capacitor E4 and a capacitor E5 which are connected in parallel; the output voltage is detected through the detection module, the frequency of the PWM signal is adjusted according to the output voltage to ensure the output constant voltage, and meanwhile, the corresponding frequency is adjusted according to the input voltage and the voltage value needing to be output, so that the voltage boosting and reducing effect is achieved.
Description
Technical Field
The utility model relates to a LED drive circuit field, in particular to LED buck-boost drive circuit.
Background
Many LED driving circuits on the market can adjust according to the input voltage to output a voltage suitable for driving LEDs, but these driving circuits have the disadvantages of narrow input voltage range and single output current, and have poor dimming effect.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a LED buck-boost drive circuit has wide input voltage, fixed output voltage's advantage, and the voltage according to the input is high or low to step down or step up to the luminance uniformity of all LEDs is guaranteed to the fixed voltage of output.
The utility model discloses a technical scheme that its technical problem was solved to an embodiment adopted is: an LED buck-boost driver circuit, comprising:
the voltage boosting and reducing module is electrically connected with an external power supply and a load respectively;
the buck-boost module comprises a chip U10, a MOS tube Q5, a MOS tube Q6, an inductor L3, a detection module, a diode D3 and a diode D3 which are connected in parallel, a capacitor E3 and a capacitor E3 which are connected in parallel, a grid electrode of the MOS tube Q3 is connected with the chip U3, a drain electrode of the MOS tube Q3 is electrically connected with an external power supply, a source electrode of the MOS tube Q3 is respectively connected with one end of the chip U3 and the inductor L3 and one end of the diode D3 and the diode D3 which are connected in parallel, the other end of the inductor L3 is respectively connected with one end of the diode D3 and the diode D3 which are connected in parallel, a drain electrode and a load output end of the MOS tube Q3, one end of the diode D3 and the diode D3 which are connected in parallel is connected with one end of the capacitor E3 and the capacitor E3 which are connected in parallel, the other end of the diode D3 and the diode D3 which are connected in parallel, the gate of the MOS tube Q6 is connected with the chip U10, and the detection module is respectively connected with the load output end and the feedback end of the chip U10; the chip U10 can adjust the output frequency according to the voltage fed back by the detection module, the output frequency is reduced when the voltage is higher than a preset value, and the output frequency is increased when the voltage is lower than the preset value.
Further, the voltage boosting and reducing module further comprises an EMC filtering module and an anti-reverse module which are sequentially connected, the EMC filtering module is electrically connected with an external power supply, and the anti-reverse module is electrically connected with a drain electrode of the MOS tube Q5.
Preferably, the LED buck-boost driving circuit further comprises an MCU control module, and an input detection module, an MCU power supply module and a DALI module which are connected with the MCU control module, wherein the input detection module, the MCU power supply module and the DALI module are connected, the input detection module is electrically connected with an external power supply, and the MCU power supply module is connected with the buck-boost module.
Further, the EMC filtering module includes inductance LF1, inductance LF2, parallelly connected electric capacity CX1 and electric capacity CX2 and parallelly connected electric capacity CX3 and electric capacity CX4, the one end that electric capacity CX1 and electric capacity CX2 connect in parallel back is connected with the one end of external power supply and the one end of inductance LF1 respectively, the other end that electric capacity CX1 and electric capacity CX2 connect in parallel back is connected with the other end of external power supply and the one end of inductance LF1 respectively, the other end of inductance LF1 is parallelly connected with electric capacity CX3 and electric capacity CX4, electric capacity CX3 and electric capacity CX4 are parallelly connected with the one end of inductance LF2, the other end of inductance LF2 is connected with anti.
Further, the reverse connection prevention module comprises a MOS tube Q4 and a diode D5, the grid of the MOS tube Q4 is respectively connected with the EMC filtering module, the cathode of the diode D5 and the drain of the MOS tube Q5, the source of the MOS tube Q4 is connected with the EMC filtering module, and the drain of the MOS tube Q4 is connected with the drain of the MOS tube Q5.
Further, the LED buck-boost driving circuit further comprises a constant current module which is respectively connected with the MCU control module, the buck-boost module and the load.
Further, the LED buck-boost driving circuit further comprises a temperature detection module respectively connected with the load and the MCU control module.
Further, the LED buck-boost driving circuit further comprises a no-load detection module respectively connected with the load and the MCU control module.
The utility model has the advantages that: an LED buck-boost driver circuit, comprising: the voltage boosting and reducing module is electrically connected with an external power supply and a load respectively; the buck-boost module comprises a chip U10, a MOS tube Q5, a MOS tube Q6, an inductor L3, a detection module, a diode D7 and a diode D8 which are connected in parallel, a diode D9 and a diode D10 which are connected in parallel, and a capacitor E4 and a capacitor E5 which are connected in parallel; the output voltage is detected through the detection module, the frequency of the PWM signal is adjusted according to the output voltage to ensure the output constant voltage, and meanwhile, the corresponding frequency is adjusted according to the input voltage and the voltage value needing to be output, so that the voltage boosting and reducing effect is achieved.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic block diagram of a buck-boost driver circuit;
FIG. 2 is a schematic diagram of an MCU control module;
FIG. 3 is a schematic diagram of an MCU power supply module;
FIG. 4 is a partial schematic diagram of a buck-boost module;
fig. 5 is a schematic diagram of an EMC filter module and an anti-reverse module.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as excluding the number, and the terms greater than, less than, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise explicitly defined, the terms "set," "mounted," "connected," and the like are to be understood in a broad sense, and may be directly connected or indirectly connected through an intermediate medium, for example; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be a mechanical connection; either as communication within the two elements or as an interactive relationship of the two elements. The technical skill in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.
Referring to fig. 1 to 5, an LED buck-boost driving circuit includes: the voltage boosting and reducing module is electrically connected with an external power supply and a load respectively;
the buck-boost module comprises a chip U10, a MOS tube Q5, a MOS tube Q6, an inductor L3, a detection module 10, a diode D3 and a diode D3 which are connected in parallel, a capacitor E3 and a capacitor E3 which are connected in parallel, a grid electrode of the MOS tube Q3 is connected with the chip U3, a drain electrode of the MOS tube Q3 is electrically connected with an external power supply, a source electrode of the MOS tube Q3 is respectively connected with one end of the chip U3 and the inductor L3 and one end of the diode D3 and the diode D3 which are connected in parallel, the other end of the inductor L3 is respectively connected with one end of the diode D3 and the diode D3 which are connected in parallel, a drain electrode of the MOS tube Q3 and a load output end, one end of the diode D3 and the diode D3 which are connected in parallel is connected with the capacitor E3 and the capacitor E3 which are connected in parallel, the other end of the diode D3 and the diode D3 which are connected in parallel, and the, the gate of the MOS transistor Q6 is connected to the chip U10, and the detection module 10 is connected to the load output terminal and the feedback terminal of the chip U10, respectively; the chip U10 can adjust the output frequency according to the voltage fed back by the detection module 10, and when the voltage is higher than the preset value, the output frequency is reduced, and when the voltage is lower than the preset value, the output frequency is increased.
In the utility model discloses in, the preferred 48V of voltage of output, the voltage of two inputs is DC35-55V, when detection module 10 detected that the voltage of input is less than 48V, inductance L3 was earlier filled and can, provide corresponding frequency by chip U10 and give MOS pipe Q6, through diode D9 and diode D10, and export 48V after electric capacity E4 and E5 filtering, accomplish the process of stepping up to reach stable 48V output; when the detection module 10 detects that the input is higher than 48V, the inductor L3 is charged first, the chip U10 provides the corresponding frequency to the MOS transistor Q5, and after passing through the diode D7 and the diode D8, the voltage is filtered by the capacitor 2E 4 and the capacitor E5 to output 48V voltage, thereby completing the voltage reduction process.
The buck-boost module further comprises an EMC filtering module 20 and an anti-reverse module 30 which are connected in sequence, the EMC filtering module 20 is electrically connected with an external power supply, and the anti-reverse module 30 is electrically connected with the drain electrode of the MOS tube Q5.
The LED buck-boost driving circuit further comprises an MCU control module, an input detection module, an MCU power supply module and a DALI module, wherein the input detection module, the MCU power supply module and the DALI module are connected with the MCU control module, the input detection module is electrically connected with an external power supply, and the MCU power supply module is connected with the buck-boost module.
The DALI communication protocol is an illumination control communication protocol of international published specification, a network can be formed by maximum 64-bit short address and 16 group addresses, and one host can control one or more slave machines to carry out communication in a half-duplex mode; it has the advantages that: the system has the advantages of simple and easy design, simple and economic installation, accurate and reliable control, simple communication structure, wide application range and the like, and provides possibility for realizing unified standards and networking control of the illumination and control system.
The reverse connection preventing module 30 comprises a MOS transistor Q4 and a diode D5, the grid of the MOS transistor Q4 is respectively connected with the EMC filtering module 20, the cathode of the diode D5 and the drain of the MOS transistor Q5, the source of the MOS transistor Q4 is connected with the EMC filtering module 20, and the drain of the MOS transistor Q4 is connected with the drain of the MOS transistor Q5.
The LED buck-boost driving circuit further comprises a constant current module which is respectively connected with the MCU control module, the buck-boost module and the load.
The LED buck-boost driving circuit further comprises a temperature detection module respectively connected with the load and the MCU control module.
The LED buck-boost driving circuit further comprises a no-load detection module respectively connected with the load and the MCU control module.
Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications and substitutions are included in the scope defined by the claims of the present application.
Claims (8)
1. An LED buck-boost driving circuit, comprising:
the voltage boosting and reducing module is electrically connected with an external power supply and a load respectively;
the buck-boost module comprises a chip U10, a MOS tube Q5, a MOS tube Q6, an inductor L3, a detection module (10), a diode D3 and a diode D3 which are connected in parallel, a capacitor E3 and a capacitor E3 which are connected in parallel, wherein the grid electrode of the MOS tube Q3 is connected with the chip U3, the drain electrode of the MOS tube Q3 is electrically connected with an external power supply, the source electrode of the MOS tube Q3 is respectively connected with one end of the chip U3 and the inductor L3 and one end of the diode D3 and the diode D3 which are connected in parallel, the other end of the inductor L3 is respectively connected with one end of the diode D3 and the diode D3 which are connected in parallel, the drain electrode of the MOS tube Q3 and a load output end, one end of the diode D3 and the diode D3 which are connected in parallel is connected with one end of the capacitor E3 and the capacitor E3 which are connected in parallel, the other end of the diode D3 and the diode D3 which are connected in, the gate of the MOS tube Q6 is connected with the chip U10, and the detection module (10) is respectively connected with the load output end and the feedback end of the chip U10; the chip U10 can adjust the output frequency according to the voltage fed back by the detection module (10), the output frequency is reduced when the voltage is higher than a preset value, and the output frequency is increased when the voltage is lower than the preset value.
2. The LED buck-boost driving circuit according to claim 1, wherein: the buck-boost module further comprises an EMC filtering module (20) and an anti-reverse module (30) which are sequentially connected, the EMC filtering module (20) is electrically connected with an external power supply, and the anti-reverse module (30) is electrically connected with a drain electrode of the MOS tube Q5.
3. The LED buck-boost driving circuit according to claim 1, wherein: the device comprises an MCU control module, an input detection module, an MCU power supply module and a DALI module, wherein the input detection module, the MCU power supply module and the DALI module are connected with the MCU control module, the input detection module is electrically connected with an external power supply, and the MCU power supply module is connected with a buck-boost module.
4. The LED buck-boost driving circuit according to claim 2, wherein: EMC filtering module (20) includes inductance LF1, inductance LF2, parallelly connected electric capacity CX1 and electric capacity CX2 and parallelly connected electric capacity CX3 and electric capacity CX4, the one end that electric capacity CX1 and electric capacity CX2 connect after connecting in parallel is connected with the one end of external power supply and inductance LF 1's one end respectively, the other end that electric capacity CX1 and electric capacity CX2 connect after connecting in parallel is connected with the other end of external power supply and inductance LF 1's one end respectively, the other end of inductance LF1 is parallelly connected with electric capacity CX3 and electric capacity CX4, electric capacity CX3 and electric capacity CX4 are parallelly connected with the one end of inductance LF2, the other end of inductance LF2 is connected with anti.
5. The LED buck-boost driving circuit according to claim 2, wherein: the anti-reverse connection module (30) comprises an MOS tube Q4 and a diode D5, the grid electrode of the MOS tube Q4 is respectively connected with the EMC filtering module (20), the cathode of the diode D5 and the drain electrode of the MOS tube Q5, the source electrode of the MOS tube Q4 is connected with the EMC filtering module (20), and the drain electrode of the MOS tube Q4 is connected with the drain electrode of the MOS tube Q5.
6. The LED buck-boost driving circuit according to claim 3, wherein: the constant current module is respectively connected with the MCU control module, the buck-boost module and the load.
7. The LED buck-boost driving circuit according to claim 3, wherein: the temperature detection module is respectively connected with the load and the MCU control module.
8. The LED buck-boost driving circuit according to claim 3, wherein: the device also comprises an idle load detection module respectively connected with the load and the MCU control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020842354.1U CN212013108U (en) | 2020-05-19 | 2020-05-19 | LED buck-boost driving circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020842354.1U CN212013108U (en) | 2020-05-19 | 2020-05-19 | LED buck-boost driving circuit |
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| CN212013108U true CN212013108U (en) | 2020-11-24 |
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| CN202020842354.1U Active CN212013108U (en) | 2020-05-19 | 2020-05-19 | LED buck-boost driving circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114466481A (en) * | 2021-12-31 | 2022-05-10 | 珠海雷特科技股份有限公司 | Circuit and method for detecting no-load of LED constant-voltage driving power supply and LED driver |
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2020
- 2020-05-19 CN CN202020842354.1U patent/CN212013108U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114466481A (en) * | 2021-12-31 | 2022-05-10 | 珠海雷特科技股份有限公司 | Circuit and method for detecting no-load of LED constant-voltage driving power supply and LED driver |
| CN114466481B (en) * | 2021-12-31 | 2024-03-29 | 珠海雷特科技股份有限公司 | Circuit and method for detecting no-load of LED constant-voltage driving power supply and LED driver |
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