CN218514544U - Novel LED control circuit, circuit board and LED lamp - Google Patents
Novel LED control circuit, circuit board and LED lamp Download PDFInfo
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- CN218514544U CN218514544U CN202222287516.1U CN202222287516U CN218514544U CN 218514544 U CN218514544 U CN 218514544U CN 202222287516 U CN202222287516 U CN 202222287516U CN 218514544 U CN218514544 U CN 218514544U
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Abstract
The utility model discloses a novel LED control circuit, circuit board and LED lamp, including the direct current power supply positive pole, first LED module and second LED module, first LED module includes first lamp strip, first resistance and first constant current drive IC, first constant current drive IC includes first chip power input end, first current detection end and first switch tube, the direct current power supply positive pole is connected to the positive pole of first lamp strip and the one end of first resistance, the other end of first resistance is connected to first chip power input end, the negative pole of first lamp strip is connected to a switch pin of first current detection end and first switch tube respectively, another switch pin of first switch tube ground connection, first constant current drive IC is used for controlling the switch of first switch tube according to the current value that first current detection end detected, so that the current value that flows through first lamp strip keeps stable; the second LED module has the same structure as the first LED module. Can reduce wiring circuit, satisfy the power supply control demand of different lamp strips simultaneously.
Description
Technical Field
The utility model relates to the technical field of lighting fixtures, especially, relate to a novel LED control circuit, circuit board and LED lamp.
Background
At present, in order to guarantee the lighting effect, the LED lamp is often provided with a plurality of lamp strips, and separate power supply is needed between different lamp strips, so that the LED control circuit on the circuit board is more and more complicated, and the wiring on the circuit board is also more and more complicated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve one of the technical problem that exists among the prior art at least, provide a novel LED control circuit, circuit board and LED lamp, can reduce wiring line, satisfy the power supply control demand of different lamp strips simultaneously.
In a first aspect, an embodiment of the present invention provides a novel LED control circuit, including the dc power supply positive pole, first LED module and second LED module, wherein:
the positive electrode of the direct current power supply is used for providing direct current voltage;
the first LED module comprises a first light bar, a first resistor and a first constant current drive IC, the first constant current drive IC comprises a first chip power supply input end, a first current detection end and a first switch tube, the positive pole of the direct current power supply is connected to the positive pole of the first light bar and one end of the first resistor, the other end of the first resistor is connected to the first chip power supply input end, the negative pole of the first light bar is respectively connected to the first current detection end and one switch pin of the first switch tube, the other switch pin of the first switch tube is grounded, and the first constant current drive IC is used for controlling the switch of the first switch tube according to the current value detected by the first current detection end so as to keep the current value flowing through the first light bar stable;
the second LED module comprises a second light bar, a second resistor and a second constant current drive IC, the second constant current drive IC comprises a second chip power supply input end, a second current detection end and a second switch tube, the positive pole of the direct current power supply is connected to the positive pole of the second light bar and one end of the second resistor, the other end of the second resistor is connected to the second chip power supply input end, the negative pole of the second light bar is respectively connected to the second current detection end and one switch pin of the second switch tube, the other switch pin of the second switch tube is grounded, and the second constant current drive IC is used for controlling the switch of the second switch tube according to the current value detected by the second current detection end so as to keep the current value flowing through the second light bar stable.
According to the utility model discloses the novel LED control circuit that provides has following beneficial effect at least: the LED driving circuit comprises a first switch tube, a second switch tube, a first constant current driving IC, a second constant current driving IC and a second LED module, wherein the first switch tube is connected with the second switch tube and is used for supplying power to the first lamp bar and the second lamp bar respectively; similarly, the second constant current driving IC controls the second switching tube to be switched on and off according to the current value detected from the second current detection end, so that the current value flowing through the second light bar is kept stable; the two LED modules are controlled independently, so that the power supply control requirements of different lamp strips can be met; in addition, the positive pole of the direct current power supply supplies power to the first constant current drive IC through the first resistor and supplies power to the second constant current drive IC through the second resistor, and the first LED module and the second LED module share the positive pole of the direct current power supply, so that wiring lines can be reduced.
In the above novel LED control circuit, the novel LED control circuit further includes a third LED module, the third LED module includes a third light bar, a third resistor and a third constant current drive IC, the third constant current drive IC includes a third chip power input end, a third current detection end and a third switch tube, the positive electrode of the dc power supply is connected to the positive electrode of the third light bar and one end of the third resistor, the other end of the third resistor is connected to the third chip power input end, the negative electrode of the third light bar is connected to the third current detection end and one switch pin of the third switch tube, the other switch pin of the third switch tube is grounded, and the third constant current drive IC is configured to control the switch of the third switch tube according to the current value detected by the third current detection end, so that the current value flowing through the third light bar is kept stable.
It can be seen that the third LED module has the same circuit structure as the first LED module and the second LED module, but the third LED module can adjust the switch of the third switching tube so that the current value flowing through the third light bar is different from the current value flowing through the first light bar and the current value flowing through the second light bar, thereby achieving different lighting effects.
In the above-mentioned novel LED control circuit, the first LED module further includes a fourth resistor, a first inductor, and a first diode, the negative electrode of the first light bar is connected to one end of the fourth resistor, the other end of the fourth resistor is connected to the first current detection end and one end of the first inductor, the other end of the first inductor is connected to a switch pin of the first switch tube, the other end of the first inductor is further connected to the positive electrode of the first diode, and the negative electrode of the first diode is connected to the positive electrode of the first light bar.
The first LED module is provided with a fourth resistor on a power supply branch circuit where the first light bar is located, so that on one hand, the current limiting protection effect can be achieved, and on the other hand, the fourth resistor is used as a detection resistor and is connected to the first current detection end, and the first constant current drive IC can calculate the current value flowing through the first light bar according to the voltage signal of the fourth resistor; the first inductor is arranged on the power supply branch where the first light bar is located, so that voltage impact on the power supply branch can be buffered, and the current value flowing through the first light bar is more stable; the first LED module is provided with the first diode, so that after the first switch tube is turned off, the electric energy reserved on the first inductor can be consumed by the first lamp bar through the first diode, and the residual electric energy in the first LED module is avoided.
In the above novel LED control circuit, the second LED module further includes a fifth resistor, a second inductor, and a second diode, a negative electrode of the second light bar is connected to one end of the fifth resistor, another end of the fifth resistor is connected to the second current detection end and one end of the second inductor, another end of the second inductor is connected to a switch pin of the second switch tube, another end of the second inductor is further connected to an anode of the second diode, and a negative electrode of the second diode is connected to an anode of the second light bar.
The second LED module is provided with a fifth resistor on the power supply branch circuit where the second light bar is located, so that on one hand, the function of current limiting protection can be achieved, and on the other hand, the fifth resistor is used as a detection resistor and is connected to the second current detection end, and the second constant current drive IC can calculate the current value flowing through the second light bar according to the voltage signal of the fifth resistor; a second inductor is arranged on the power supply branch where the second light bar is located, so that voltage impact on the power supply branch can be buffered, and the current value flowing through the second light bar is more stable; the second LED module is provided with a second diode, so that after the second switch tube is turned off, the electric energy reserved on the second inductor can be consumed by the second lamp bar through the second diode, and the electric energy remained in the second LED module is avoided.
In the above novel LED control circuit, the third LED module further includes a sixth resistor, a third inductor, and a third diode, a negative electrode of the third light bar is connected to one end of the sixth resistor, another end of the sixth resistor is connected to the third current detection end and one end of the third inductor, another end of the third inductor is connected to a switch pin of the third switching tube, another end of the third inductor is further connected to an anode of the third diode, and a negative electrode of the third diode is connected to an anode of the third light bar.
The third LED module is provided with a sixth resistor on a power supply branch circuit where the third light bar is located, so that on one hand, the third LED module can play a role in current limiting protection, and on the other hand, the third LED module is used as a detection resistor and is connected to a third current detection end, so that a third constant current drive IC can calculate the current value flowing through the third light bar according to the voltage signal of the sixth resistor; a third inductor is arranged on a power supply branch where a third light bar is located, so that voltage impact on the power supply branch can be buffered, and the current value flowing through the third light bar is more stable; the third LED module is provided with a third diode, so that after the third switch tube is turned off, the electric energy reserved on the third inductor can be consumed by the third lamp bar through the third diode, and the electric energy remained in the third LED module is avoided.
In the novel LED control circuit, the first switch tube and the second switch tube are mos tubes or triodes.
In the novel LED control circuit, the third switching tube is a mos tube or a triode.
In the above novel LED control circuit, the first LED module further includes a first auxiliary power supply branch connecting the first chip power input end and one end of the fourth resistor.
In the above novel LED control circuit, the second LED module further includes a second auxiliary power supply branch connecting the power input end of the second chip and one end of the fifth resistor.
In the above novel LED control circuit, the third LED module further includes a third auxiliary power supply branch connecting the third chip power input terminal and one end of the sixth resistor.
In the novel LED control circuit, the first light bars are provided with a plurality of light bars, and the plurality of light bars are connected in parallel; the second lamp strip is provided with many, many the second lamp strip is parallelly connected each other.
In a second aspect, an embodiment of the present invention provides a circuit board, including the novel LED control circuit as described in the above first aspect.
According to the utility model discloses the circuit board that provides has following beneficial effect at least: the LED driving circuit comprises a first switch tube, a second switch tube, a first constant current driving IC, a second constant current driving IC and a second LED module, wherein the first switch tube is connected with the second switch tube and is used for supplying power to the first lamp bar and the second lamp bar respectively; similarly, the second constant current driving IC controls the second switching tube to be switched on and off according to the current value detected from the second current detection end, so that the current value flowing through the second light bar is kept stable; the two LED modules are controlled independently, so that the power supply control requirements of different lamp strips can be met; in addition, the positive pole of the direct current power supply supplies power to the first constant current drive IC through the first resistor and supplies power to the second constant current drive IC through the second resistor, and the first LED module and the second LED module share the positive pole of the direct current power supply, so that wiring lines can be reduced.
In a third aspect, an embodiment of the present invention provides an LED lamp, which includes the novel LED control circuit as described in the above first aspect, or includes the circuit board as described in the above second aspect.
According to the utility model discloses LED lamp has following beneficial effect at least: the LED driving circuit comprises a first switch tube, a second switch tube, a first constant current driving IC, a second constant current driving IC and a second LED module, wherein the first switch tube is connected with the second switch tube and is used for supplying power to the first lamp bar and the second lamp bar respectively; similarly, the second constant current driving IC controls the second switching tube to be switched on and off according to the current value detected from the second current detection end, so that the current value flowing through the second light bar is kept stable; the two LED modules are controlled independently, so that the power supply control requirements of different lamp strips can be met; in addition, the positive pole of the direct current power supply supplies power to the first constant current drive IC through the first resistor and supplies power to the second constant current drive IC through the second resistor, and the first LED module and the second LED module share the positive pole of the direct current power supply, so that wiring lines can be reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the technical solutions of the present invention, and are incorporated in and constitute a part of this specification, together with the embodiments of the present invention for explaining the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.
The present invention will be further described with reference to the accompanying drawings and examples;
fig. 1 is a schematic circuit diagram of a novel LED control circuit provided by an embodiment of the present invention.
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, if there are first and second descriptions for distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
The embodiment of the utility model provides a novel LED control circuit, circuit board and LED lamp can reduce wiring line, satisfies the power supply control demand of different lamp strips simultaneously.
The embodiments of the present invention will be further explained with reference to the drawings.
Referring to fig. 1, a first aspect embodiment of the present invention provides a novel LED control circuit, including a dc power supply positive electrode VDD, a first LED module 100 and a second LED module 200, wherein:
the positive electrode VDD of the direct current power supply is used for providing direct current voltage;
the first LED module 100 includes a first light bar 110, a first resistor R1 and a first constant current drive IC120, the first constant current drive IC120 includes a first chip power input terminal, a first current detection terminal and a first switch tube Q1, a positive electrode VDD of a direct current power supply is connected to a positive electrode of the first light bar 110 and one end of the first resistor R1, the other end of the first resistor R1 is connected to the first chip power input terminal, a negative electrode of the first light bar 110 is respectively connected to the first current detection terminal and one switch pin of the first switch tube Q1, the other switch pin of the first switch tube Q1 is grounded, and the first constant current drive IC120 is configured to control a switch of the first switch tube Q1 according to a current value detected by the first current detection terminal, so that a current value flowing through the first light bar 110 is kept stable;
the second LED module 200 includes a second light bar 210, a second resistor R2 and a second constant current driving IC220, the second constant current driving IC220 includes a second chip power input terminal, a second current detection terminal and a second switch tube Q2, a positive electrode VDD of the dc power supply is connected to a positive electrode of the second light bar 210 and one end of the second resistor R2, the other end of the second resistor R2 is connected to the second chip power input terminal, a negative electrode of the second light bar 210 is respectively connected to the second current detection terminal and one switch pin of the second switch tube Q2, the other switch pin of the second switch tube Q2 is grounded, and the second constant current driving IC220 is configured to control a switch of the second switch tube Q2 according to a current value detected by the second current detection terminal, so as to keep a current value flowing through the second light bar 210 stable.
According to the novel LED control circuit provided by the embodiment of the present invention, two independent LED modules are provided to control the power supply of the first light bar 110 and the second light bar 210, respectively, wherein the first constant current driving IC120 controls the switch of the first switch tube Q1 according to the current value detected from the first current detection end, so that the current value flowing through the first light bar 110 is kept stable; similarly, the second constant current driving IC220 controls the second switching tube Q2 to be switched on and off according to the current value detected from the second current detection terminal, so that the current value flowing through the second light bar 210 is kept stable; the two LED modules are independently controlled, so that the power supply control requirements of different lamp strips can be met; in addition, the dc power supply positive electrode VDD supplies power to the first constant current drive IC120 through the first resistor R1 and the second constant current drive IC220 through the second resistor R2, and the first LED module 100 and the second LED module 200 share the same dc power supply positive electrode VDD, thereby reducing wiring lines.
Referring to fig. 1, in the novel LED control circuit of the above embodiment, a third LED module 300 is further included, the third LED module 300 includes a third light bar 310, a third resistor R3 and a third constant current driving IC320, the third constant current driving IC320 includes a third chip power input terminal, a third current detection terminal and a third switch tube Q3, a positive electrode VDD of a dc power supply is connected to a positive electrode of the third light bar 310 and one end of the third resistor R3, the other end of the third resistor R3 is connected to the third chip power input terminal, a negative electrode of the third light bar 310 is respectively connected to the third current detection terminal and one switch pin of the third switch tube Q3, the other switch pin of the third switch tube Q3 is grounded, and the third constant current driving IC320 is configured to control the switching of the third switch tube Q3 according to a current value detected by the third current detection terminal, so that a current value flowing through the third light bar 310 is kept stable.
It can be seen that the third LED module 300 has the same circuit structure as the first LED module 100 and the second LED module 200, but the third LED module 300 can adjust the switch of the third switching tube Q3 so that the current value flowing through the third light bar 310 is different from the current value flowing through the first light bar 110 and the current value flowing through the second light bar 210, thereby achieving different lighting effects.
Referring to fig. 1, in the novel LED control circuit of the above embodiment, the first LED module 100 further includes a fourth resistor R4, a first inductor L1 and a first diode D1, a negative electrode of the first light bar 110 is connected to one end of the fourth resistor R4, the other end of the fourth resistor R4 is respectively connected to the first current detection end and one end of the first inductor L1, the other end of the first inductor L1 is connected to one switch pin of the first switch Q1, the other end of the first inductor L1 is further connected to an anode of the first diode D1, and a negative electrode of the first diode D1 is connected to an anode of the first light bar 110.
The first LED module 100 is provided with a fourth resistor R4 on the power supply branch where the first light bar 110 is located, so that on one hand, the current-limiting protection function can be achieved, and on the other hand, the fourth resistor R4 is connected to the first current detection end as a detection resistor, so that the first constant current driving IC120 can calculate a current value flowing through the first light bar 110 according to a voltage signal of the fourth resistor R4; the first inductor L1 is arranged on the power supply branch where the first light bar 110 is located, so that voltage impact on the power supply branch can be buffered, and a current value flowing through the first light bar 110 is more stable; first LED module 100 sets up first diode D1, can make first switch tube Q1 after the shutoff, and the electric energy that persists on the first inductance L1 can be consumed by first lamp strip 110 through first diode D1, avoids the inside electric energy that remains of first LED module 100.
Referring to fig. 1, in the novel LED control circuit of the above embodiment, the second LED module 200 further includes a fifth resistor R5, a second inductor L2 and a second diode D2, a negative electrode of the second light bar 210 is connected to one end of the fifth resistor R5, the other end of the fifth resistor R5 is respectively connected to the second current detection end and one end of the second inductor L2, the other end of the second inductor L2 is connected to one switch pin of the second switch Q2, the other end of the second inductor L2 is further connected to an anode of the second diode D2, and a negative electrode of the second diode D2 is connected to the anode of the second light bar 210.
The second LED module 200 sets a fifth resistor R5 on the power supply branch where the second light bar 210 is located, so that on one hand, the function of current limiting protection can be achieved, and on the other hand, the fifth LED module serves as a detection resistor and is connected to the second current detection end, so that the second constant current drive IC220 can calculate a current value flowing through the second light bar 210 according to a voltage signal of the fifth resistor R5; a second inductor L2 is arranged on the power supply branch where the second light bar 210 is located, so that voltage impact on the power supply branch can be buffered, and the current value flowing through the second light bar 210 is more stable; the second LED module 200 is provided with the second diode D2, so that after the second switch tube Q2 is turned off, the electric energy retained in the second inductor L2 can be consumed by the second light bar 210 through the second diode D2, thereby avoiding the residual electric energy in the second LED module 200.
Referring to fig. 1, in the novel LED control circuit of the above embodiment, the third LED module 300 further includes a sixth resistor R6, a third inductor L3 and a third diode D3, a negative electrode of the third light bar 310 is connected to one end of the sixth resistor R6, the other end of the sixth resistor R6 is respectively connected to the third current detection end and one end of the third inductor L3, the other end of the third inductor L3 is connected to one switch pin of the third switch Q3, the other end of the third inductor L3 is further connected to an anode of the third diode D3, and a negative electrode of the third diode D3 is connected to the anode of the third light bar 310.
The third LED module 300 sets a sixth resistor R6 on the power supply branch where the third light bar 310 is located, so that on one hand, the function of current limiting protection can be achieved, and on the other hand, the third LED module serves as a detection resistor and is connected to the third current detection end, so that the third constant current drive IC320 can calculate a current value flowing through the third light bar 310 according to a voltage signal of the sixth resistor R6; a third inductor L3 is arranged on the power supply branch where the third light bar 310 is located, so that voltage impact on the power supply branch can be buffered, and the current value flowing through the third light bar 310 is more stable; the third LED module 300 is provided with a third diode D3, so that after the third switching tube Q3 is turned off, the electric energy reserved on the third inductor L3 can be consumed by the third light bar 310 through the third diode D3, thereby avoiding the residual electric energy inside the third LED module 300.
Referring to fig. 1, in the novel LED control circuit of the above embodiment, the first switching tube Q1 and the second switching tube Q2 are mos tubes or triodes.
Referring to fig. 1, in the novel LED control circuit of the above embodiment, the third switching tube Q3 is a mos tube or a triode.
Referring to fig. 1, in the novel LED control circuit, the first LED module 100 further includes a first auxiliary power supply branch 130 connecting the first chip power input terminal and one end of the fourth resistor R4.
When the first constant current driving IC120 is in an initial stage of starting, the first light bar 110 is not yet turned on, and the first auxiliary power supply branch 130 is also not turned on, at this time, the positive electrode VDD of the dc power supply provides power for the first constant current driving IC120 through the first resistor R1; after the first constant current driving IC120 is powered, the control circuit starts the first light bar 110 to enter a constant current conducting state. At this time, the first auxiliary power supply branch 130 also enters the conducting state, and the first auxiliary power supply branch 130 starts to supply power to the first constant current driver IC120, which becomes a main source of the chip power supply, so that the first resistor R1 is weakened and is only a small branch in the power supply loop of the chip power supply.
Referring to fig. 1, in the novel LED control circuit, the second LED module 200 further includes a second auxiliary power supply branch 230 connecting the second chip power input terminal and one end of the fifth resistor R5.
When the second constant current driving IC220 is in the initial stage of starting, the second light bar 210 is not yet turned on, and the second auxiliary power supply branch 230 is also not turned on, at this time, the positive electrode VDD of the dc power supply supplies power to the second constant current driving IC220 through the second resistor R2; after the second constant current driving IC220 is powered, the control circuit starts the second light bar 210 to enter a constant current conducting state. At this time, the second auxiliary power supply branch 230 also enters the conducting state, and the second auxiliary power supply branch 230 starts to supply power to the second constant current driving IC220, which becomes a main source of the chip power supply, and thus the second resistor R2 is weakened to be only a small branch in the chip power supply loop.
Referring to fig. 1, in the novel LED control circuit, the third LED module 300 further includes a third auxiliary power supply branch 330 connecting the third chip power input end and one end of the sixth resistor R6.
When the third constant current drive IC320 is in the initial stage of starting, the third light bar 310 is not yet turned on, and the third auxiliary power supply branch 330 is also turned off, at this time, the positive electrode VDD of the direct current power supply supplies power to the third constant current drive IC320 through the third resistor R3; after the third constant current driving IC320 is powered, the control circuit starts the third light bar 310 to enter a constant current conducting state. At this time, the third auxiliary power supply branch 330 also enters the conducting state, and the third auxiliary power supply branch 330 starts to supply power to the third constant current driver IC320, which becomes a main source of the chip power supply, and thus the third resistor R3 is weakened to be only a small branch in the chip power supply loop.
Referring to fig. 1, in the novel LED control circuit of the embodiment, a plurality of first light bars 110 are provided, and the plurality of first light bars 110 are connected in parallel; the second light bar 210 is provided with a plurality of second light bars 210 connected in parallel.
In addition, the embodiment of the second aspect of the present invention provides a circuit board, which includes the novel LED control circuit as described above in the embodiment of the first aspect.
According to the circuit board provided by the embodiment of the present invention, two mutually independent LED modules are provided to respectively control the power supply of the first light bar 110 and the second light bar 210, wherein the first constant current driving IC120 controls the switch of the first switch tube Q1 according to the current value detected from the first current detection end, so that the current value flowing through the first light bar 110 is kept stable; similarly, the second constant current driving IC220 controls the switching of the second switching tube Q2 according to the current value detected from the second current detecting terminal, so that the current value flowing through the second light bar 210 is kept stable; the two LED modules are controlled independently, so that the power supply control requirements of different lamp strips can be met; in addition, the dc power supply positive electrode VDD supplies power to the first constant current drive IC120 through the first resistor R1 and the second constant current drive IC220 through the second resistor R2, and the first LED module 100 and the second LED module 200 share one dc power supply positive electrode VDD, thereby reducing wiring lines.
In addition, the embodiment of the third aspect of the present invention provides an LED lamp, which includes the novel LED control circuit as the above embodiment of the first aspect or includes the circuit board as the above embodiment of the second aspect.
According to the LED lamp provided by the embodiment of the present invention, by providing two mutually independent LED modules, power supply control is performed on the first light bar 110 and the second light bar 210, wherein the first constant current driving IC120 controls the switch of the first switch tube Q1 according to the current value detected from the first current detection end, so that the current value flowing through the first light bar 110 is kept stable; similarly, the second constant current driving IC220 controls the switching of the second switching tube Q2 according to the current value detected from the second current detecting terminal, so that the current value flowing through the second light bar 210 is kept stable; the two LED modules are controlled independently, so that the power supply control requirements of different lamp strips can be met; in addition, the dc power supply positive electrode VDD supplies power to the first constant current drive IC120 through the first resistor R1 and the second constant current drive IC220 through the second resistor R2, and the first LED module 100 and the second LED module 200 share the same dc power supply positive electrode VDD, thereby reducing wiring lines.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. A novel LED control circuit, comprising:
the direct current power supply anode is used for providing direct current voltage;
the first LED module comprises a first light bar, a first resistor and a first constant current drive IC, the first constant current drive IC comprises a first chip power supply input end, a first current detection end and a first switch tube, the positive pole of a direct current power supply is connected to the positive pole of the first light bar and one end of the first resistor, the other end of the first resistor is connected to the first chip power supply input end, the negative pole of the first light bar is respectively connected to the first current detection end and one switch pin of the first switch tube, the other switch pin of the first switch tube is grounded, and the first constant current drive IC is used for controlling the switch of the first switch tube according to the current value detected by the first current detection end so as to keep the current value flowing through the first light bar stable;
the second LED module comprises a second light bar, a second resistor and a second constant current drive IC, the second constant current drive IC comprises a second chip power supply input end, a second current detection end and a second switch tube, the positive pole of the direct current power supply is connected to the positive pole of the second light bar and one end of the second resistor, the other end of the second resistor is connected to the second chip power supply input end, the negative pole of the second light bar is respectively connected to the second current detection end and one switch pin of the second switch tube, the other switch pin of the second switch tube is grounded, and the second constant current drive IC is used for controlling the switch of the second switch tube according to the current value detected by the second current detection end so as to keep the current value flowing through the second light bar stable.
2. The novel LED control circuit of claim 1, further comprising a third LED module, wherein the third LED module comprises a third light bar, a third resistor and a third constant current driving IC, the third constant current driving IC comprises a third chip power input terminal, a third current detection terminal and a third switch tube, the positive electrode of the DC power supply is connected to the positive electrode of the third light bar and one end of the third resistor, the other end of the third resistor is connected to the third chip power input terminal, the negative electrode of the third light bar is respectively connected to the third current detection terminal and one switch pin of the third switch tube, the other switch pin of the third switch tube is grounded, and the third constant current driving IC is configured to control the switching of the third switch tube according to the current value detected by the third current detection terminal, so as to keep the current value flowing through the third light bar stable.
3. The novel LED control circuit of claim 1, wherein the first LED module further comprises a fourth resistor, a first inductor and a first diode, the negative electrode of the first light bar is connected to one end of the fourth resistor, the other end of the fourth resistor is respectively connected to the first current detection terminal and one end of the first inductor, the other end of the first inductor is connected to one switch pin of the first switch tube, the other end of the first inductor is further connected to the positive electrode of the first diode, and the negative electrode of the first diode is connected to the positive electrode of the first light bar.
4. The novel LED control circuit of claim 1, wherein the second LED module further comprises a fifth resistor, a second inductor and a second diode, the negative electrode of the second light bar is connected to one end of the fifth resistor, the other end of the fifth resistor is respectively connected to the second current detection terminal and one end of the second inductor, the other end of the second inductor is connected to one switch pin of the second switch tube, the other end of the second inductor is further connected to the positive electrode of the second diode, and the negative electrode of the second diode is connected to the positive electrode of the second light bar.
5. The novel LED control circuit of claim 2, wherein the third LED module further comprises a sixth resistor, a third inductor and a third diode, a negative electrode of the third light bar is connected to one end of the sixth resistor, the other end of the sixth resistor is respectively connected to the third current detection terminal and one end of the third inductor, the other end of the third inductor is connected to one switch pin of the third switch tube, the other end of the third inductor is further connected to an anode of the third diode, and a negative electrode of the third diode is connected to an anode of the third light bar.
6. The novel LED control circuit of claim 3, wherein the first LED module further comprises a first auxiliary power supply branch connecting the first chip power input terminal and one end of the fourth resistor.
7. The novel LED control circuit of claim 4, wherein the second LED module further comprises a second auxiliary power supply branch connecting the second chip power input terminal and one end of the fifth resistor.
8. The novel LED control circuit of claim 1, wherein the first light bar is provided with a plurality of first light bars, and the plurality of first light bars are connected in parallel with each other; the second lamp strip is provided with many, many the second lamp strip is parallelly connected each other.
9. A circuit board comprising the novel LED control circuit of any one of claims 1 to 8.
10. An LED lamp comprising the novel LED control circuit of any one of claims 1 to 8 or the circuit board of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222287516.1U CN218514544U (en) | 2022-08-29 | 2022-08-29 | Novel LED control circuit, circuit board and LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222287516.1U CN218514544U (en) | 2022-08-29 | 2022-08-29 | Novel LED control circuit, circuit board and LED lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218514544U true CN218514544U (en) | 2023-02-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222287516.1U Active CN218514544U (en) | 2022-08-29 | 2022-08-29 | Novel LED control circuit, circuit board and LED lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218514544U (en) |
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2022
- 2022-08-29 CN CN202222287516.1U patent/CN218514544U/en active Active
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