CN209861216U - Induction LED drive circuit - Google Patents
Induction LED drive circuit Download PDFInfo
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- CN209861216U CN209861216U CN201822181417.9U CN201822181417U CN209861216U CN 209861216 U CN209861216 U CN 209861216U CN 201822181417 U CN201822181417 U CN 201822181417U CN 209861216 U CN209861216 U CN 209861216U
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Abstract
The utility model discloses an induction LED drive circuit, which comprises a rectifying filter circuit and a non-dimming LED drive circuit, the LED lamp comprises a voltage stabilizing power supply circuit, an induction circuit and a signal inversion processing circuit, wherein the voltage input end of the rectifying and filtering circuit is connected with commercial low-frequency alternating current, the voltage output end of the rectifying and filtering circuit is connected with the voltage input end of a non-dimming LED driving circuit, the voltage output end of the non-dimming LED driving circuit is respectively connected with an LED lamp bead module and the voltage input end of the voltage stabilizing power supply circuit, a voltage stabilizing power supply port of the voltage stabilizing power supply circuit is respectively connected with a +12V voltage input end of the induction circuit and a +12V voltage input end of the signal inversion processing circuit, the induction signal output end of the induction circuit is connected with the induction signal input end of the signal inversion processing circuit, and a VCC power supply control end of the signal inversion processing circuit; the LED drive power supply has the advantages of low cost, multiple applicable topological modes, capability of reducing the types of the LED drive power supply at the design end and contribution to production and management.
Description
Technical Field
The utility model relates to a LED responds to the lamp, especially relates to an response LED drive circuit.
Background
The LED induction lamp is used as a new generation of intelligent green energy-saving lighting lamp and has been widely applied to occasions such as home furnishing, business and the like. At present, the two common LED induction lamps include an infrared induction LED induction lamp and an RF (radio frequency) microwave induction LED induction lamp, and the two LED induction lamps are switched between induction on/off states by detecting a moving state of a human body or an object.
At present, in order to meet or design an LED lamp product with an induction function in many factories, a dimming chip with an analog port or a digital port is often selected in the selection of an LED driving circuit, however, the dimming chip has high cost, many peripheral circuits and few applicable topological ways, so that the unit price of the finished LED driving power supply in the market is high. In addition, some illumination customers need not have the LED lamps and lanterns product of response function, and some illumination customers need have the LED lamps and lanterns product of response function, and for adapting to the different demands of illumination customer, the design end need be to the different LED drive power supply of different demand designs, leads to LED drive power supply's kind to be many, nevertheless is extremely unfavorable for production and management like this, also does not benefit to the standardization yet.
Disclosure of Invention
The utility model aims to solve the technical problem that an response LED drive circuit is provided, its is with low costs, applicable topological mode is many, and can make the design end reduce LED drive power supply's kind, does benefit to standardized production and management.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: an inductive LED drive circuit, comprising: comprises a rectifying and filtering circuit, a non-dimming LED drive circuit, a voltage-stabilizing power supply circuit, an induction circuit and a signal inversion processing circuit, the voltage input end of the rectifying and filtering circuit is connected with commercial low-frequency alternating current, the voltage output end of the rectifying and filtering circuit is connected with the voltage input end of the non-dimming LED driving circuit, the voltage output end of the non-dimming LED driving circuit is respectively connected with the LED lamp bead module and the voltage input end of the voltage-stabilizing power supply circuit, the voltage-stabilizing power supply port of the voltage-stabilizing power supply circuit is respectively connected with the +12V voltage input end of the induction circuit and the +12V voltage input end of the signal inversion processing circuit, the sensing signal output end of the sensing circuit is connected with the sensing signal input end of the signal inversion processing circuit, and the VCC power supply control end of the signal inversion processing circuit is connected with the VCC power supply input end of the non-dimming LED driving circuit.
When the LED lamp bead module is in an induction state, the induction signal output end of the induction circuit outputs a high level, the voltage at the VCC power supply input end of the non-dimming LED driving circuit keeps the original amplitude value through the signal inversion processing circuit, the non-dimming LED driving circuit works normally, and the LED lamp beads in the LED lamp bead module are on; when being in the non-induction state, induction circuit's sensing signal output part output low level, through signal reversal processing circuit make the voltage of non-LED drive circuit's of adjusting luminance VCC power input end department be drawn low, non-LED drive circuit of adjusting luminance not work, LED lamp pearl in LED lamp pearl module go out.
The signal inversion processing circuit consists of a first NPN triode, a second NPN triode, a first base resistor, a first collector resistor, a second base resistor and a second collector resistor, wherein one end of the first base resistor is used as an induction signal input end of the signal inversion processing circuit and is connected with an induction signal output end of the induction circuit, the other end of the first base resistor is connected with a base electrode of the first NPN triode, a collector electrode of the first NPN triode is respectively connected with one end of the first collector resistor and one end of the second base resistor, the other end of the first collector resistor is used as a +12V voltage input end of the signal inversion processing circuit and is connected with a voltage stabilizing port of the voltage stabilizing power supply circuit, and the other end of the second base resistor is connected with a base electrode of the second NPN triode, the collector of the second NPN triode is connected to one end of the second collector resistor, the other end of the second collector resistor is used as a VCC power supply control end of the signal inversion processing circuit and is connected to a VCC power supply input end of the non-dimming LED driving circuit, and the emitter of the first NPN triode and the emitter of the second NPN triode are both grounded. The signal inversion processing circuit is simple in structure, the first NPN triode and the second NPN triode form a composite switching circuit, the second NPN triode is cut off and disconnected when the first NPN triode is in saturated conduction, and the second NPN triode is in saturated conduction when the first NPN triode is cut off and disconnected.
A +12V voltage input end of the signal inversion processing circuit is connected with a +12V voltage to supply power to a base electrode of the second NPN triode, when the signal inversion processing circuit is in an induction state, an induction signal output end of the induction circuit outputs a +3.3V high level, the +3.3V high level is input to a base electrode of the first NPN triode through the first base electrode resistor, the first NPN triode is in saturated conduction, the +12V voltage supplied to the base electrode of the second NPN triode is pulled down, the second NPN triode is cut off and disconnected, at the moment, the voltage at a VCC power supply input end of the non-dimming LED driving circuit keeps an original amplitude value, the non-dimming LED driving circuit works normally, and an LED lamp in the LED lamp bead module is on; when the LED lamp is in a non-induction state, the induction signal output end of the induction circuit outputs 0V low level, the base of the first NPN triode has no base current, the first NPN triode is cut off and disconnected, the +12V voltage output by the voltage stabilizing power supply port of the voltage stabilizing power supply circuit normally supplies power to the base of the second NPN triode, the second NPN triode is in saturated conduction, the voltage at the VCC power supply input end of the non-dimming LED driving circuit is pulled down at the moment, the non-dimming LED driving circuit does not work, and the LED lamp beads in the LED lamp bead module are turned off.
Compared with the prior art, the utility model has the advantages of:
1) the non-dimming LED driving circuit is adopted by the induction LED driving circuit, the cost of a non-dimming chip in the non-dimming LED driving circuit is low, the non-dimming chips of various different models can be selected, and the applicable topological mode is multiple.
2) The induction LED driving circuit adopts a non-dimming LED driving circuit and is combined with a voltage-stabilizing power supply circuit, an induction circuit and a signal inversion processing circuit, so that an LED driving power supply with an induction function can be obtained by adopting a non-dimming chip; in order to meet the requirement of an LED lamp product which does not have an induction function, the design end only needs to remove the voltage-stabilizing power supply circuit, the induction circuit and the signal inversion processing circuit, and the connection relation of other parts in the whole LED driving circuit is not required to be changed, so that the type of the LED driving power supply is reduced by the design end, and the standardized production and management are facilitated.
Drawings
Fig. 1 is a block diagram of the inductive LED driving circuit of the present invention;
fig. 2 is a circuit diagram of the induction LED driving circuit of the present invention;
fig. 3 is a circuit diagram of a signal inversion processing circuit in the induction LED driving circuit of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
The utility model provides an induction LED drive circuit, as shown in figure 1 and figure 2, it includes rectifying filter circuit 1, non-dimming LED drive circuit 2, voltage-stabilizing power supply circuit 3, infrared induction circuit 4 and signal reversal processing circuit 5, the voltage input end of rectifying filter circuit 1 is connected into city low frequency alternating current, the voltage output end of rectifying filter circuit 1 is connected with the voltage input end of non-dimming LED drive circuit 2, the voltage output end of non-dimming LED drive circuit 2 is connected with the voltage input end of LED lamp bead module 6 and voltage-stabilizing power supply circuit 3 respectively, the voltage-stabilizing power supply port of voltage-stabilizing power supply circuit 3 is connected with the +12V voltage input end of induction circuit 4 and the +12V voltage input end of signal reversal processing circuit 5 respectively, the induction signal output end of induction circuit 4 is connected with the induction signal input end of signal reversal processing circuit 5, the VCC power supply control terminal of the signal inversion processing circuit 5 is connected to the VCC power supply input terminal of the non-dimming LED driving circuit 2. When the LED lamp is in an induction state, the induction signal output end of the induction circuit 4 outputs a high level, the voltage at the VCC power supply input end of the non-dimming LED driving circuit 2 keeps the original amplitude value through the signal inversion processing circuit 5, the non-dimming LED driving circuit 2 works normally, and the LED lamp in the LED lamp bead module 6 is on; when being in the non-induction state, the response signal output part output low level of induction circuit 4 makes the voltage of the VCC power input end department of non-dimming LED drive circuit 2 pulled down through signal reversal processing circuit 5, and non-dimming LED drive circuit 2 is out of work, and LED lamp pearl in LED lamp pearl module 6 goes out.
Preferably, the rectifying and filtering circuit 1, the non-dimming LED driving circuit 2, the voltage-stabilizing power supply circuit 3 and the infrared induction circuit 4 all adopt the prior art; the connection of the rectification filter circuit 1 and the non-dimming LED drive circuit 2 and the connection of the non-dimming LED drive circuit 2 and the LED lamp bead module 6 adopt the existing connection mode; the voltage input end of the voltage-stabilizing power supply circuit 3 is connected with the voltage output end of the non-dimming LED driving circuit 2, in fig. 2, one end of a resistor R15 is connected with one end of a capacitor C5, the voltage-stabilizing power supply port of the voltage-stabilizing power supply circuit 3 is respectively connected with the +12V voltage input end of the infrared induction circuit 4 and the +12V voltage input end of the signal inversion processing circuit 5, and the voltage-stabilizing power supply port of the voltage-stabilizing power supply circuit 3 in fig. 2 is respectively connected with the VCC port of the induction chip U2 in the infrared induction circuit 4 and one end of a first collector resistor Rc1 in the signal inversion processing circuit 5; the sensing signal output end of the infrared sensing circuit 4 is the OUT port of the sensing chip U2, and is connected to one end of the first base resistor Rb1 in the signal inversion processing circuit 5.
Preferably, as shown in fig. 2 and 3, the signal inversion processing circuit 5 comprises a first NPN triode Q1, a second NPN triode Q2, a first base resistor Rb1, a first collector resistor Rc1, a second base resistor Rb2 and a second collector resistor Rc2, one end of the first base resistor Rb1 is connected to the sensing signal input end of the sensing circuit 4 as the sensing signal input end of the signal inversion processing circuit 5, the other end of the first base resistor Rb1 is connected to the base of the first NPN triode Q1, the collector of the first NPN triode Q1 is connected to one end of the first collector resistor Rc1 and one end of the second base resistor Rb2, the other end of the first collector resistor Rc1 is connected to the regulated power supply port of the regulated power supply circuit 3 as the +12V voltage input end of the signal inversion processing circuit 5, the other end of the second base resistor Rb2 is connected to the base of the second NPN triode Q2, the collector of the second NPN triode Q2 is connected to one end of a second collector resistor Rc2, and the other end of the second collector resistor Rc2 is connected as a VCC power supply control terminal of the signal inversion processing circuit 5 to the VCC power supply input terminal of the non-dimming LED driving circuit 2, that is, to the VCC port of the non-dimming chip U1 in the non-dimming LED driving circuit 2, and the emitter of the first NPN triode Q1 and the emitter of the second NPN triode Q2 are both grounded. When the +12V voltage input terminal of the signal inversion processing circuit 5 is connected to +12V voltage to supply power to the base of the second NPN transistor Q2, when the signal inversion processing circuit is in the sensing state, the sensing signal output terminal of the sensing circuit 4 outputs +3.3V high level, the +3.3V high level is input to the base of the first NPN transistor Q1 through the first base resistor Rb1, the first NPN transistor Q1 is in saturation conduction (since the first base resistor Rb1 has base current flowing, the collector of the first NPN transistor Q1 is made to flow larger amplification current, the first NPN transistor Q1 operates in saturation region), since the first NPN transistor Q1 is on, the +12V voltage supplied to the base of the second NPN transistor Q2 is pulled down, the second NPN transistor Q2 is turned off due to insufficient base voltage (the second NPN transistor Q2 operates in cutoff region), and at this time, the VCC input terminal of the non-dimming driving circuit 2 maintains the original NPN input voltage, the non-dimming LED driving circuit 2 works normally, and the LED lamp beads in the LED lamp bead module 6 are on; when the LED lamp is in a non-induction state, the induction signal output end of the induction circuit 4 outputs a low level of 0V, the base of the first NPN triode Q1 has no base current, the first NPN triode Q1 is turned off, the +12V voltage output by the voltage stabilizing power supply port of the voltage stabilizing power supply circuit 3 normally supplies power to the base of the second NPN triode Q2, the second NPN triode Q2 is in saturated conduction, at this time, the voltage at the VCC power supply input end of the non-dimming LED driving circuit 2 is pulled down (lower than the lowest working voltage of the non-dimming LED driving circuit 2), the non-dimming LED driving circuit 2 does not work, and the LED lamp in the LED lamp module 6 is turned off.
Claims (4)
1. An inductive LED drive circuit, comprising: comprises a rectifying and filtering circuit, a non-dimming LED drive circuit, a voltage-stabilizing power supply circuit, an induction circuit and a signal inversion processing circuit, the voltage input end of the rectifying and filtering circuit is connected with commercial low-frequency alternating current, the voltage output end of the rectifying and filtering circuit is connected with the voltage input end of the non-dimming LED driving circuit, the voltage output end of the non-dimming LED driving circuit is respectively connected with the LED lamp bead module and the voltage input end of the voltage-stabilizing power supply circuit, the voltage-stabilizing power supply port of the voltage-stabilizing power supply circuit is respectively connected with the +12V voltage input end of the induction circuit and the +12V voltage input end of the signal inversion processing circuit, the sensing signal output end of the sensing circuit is connected with the sensing signal input end of the signal inversion processing circuit, and the VCC power supply control end of the signal inversion processing circuit is connected with the VCC power supply input end of the non-dimming LED driving circuit.
2. An inductive LED driver circuit according to claim 1, wherein: when the LED lamp bead module is in an induction state, the induction signal output end of the induction circuit outputs a high level, the voltage at the VCC power supply input end of the non-dimming LED driving circuit keeps the original amplitude value through the signal inversion processing circuit, the non-dimming LED driving circuit works normally, and the LED lamp beads in the LED lamp bead module are on; when being in the non-induction state, induction circuit's sensing signal output part output low level, through signal reversal processing circuit make the voltage of non-LED drive circuit's of adjusting luminance VCC power input end department be drawn low, non-LED drive circuit of adjusting luminance not work, LED lamp pearl in LED lamp pearl module go out.
3. An inductive LED driver circuit according to claim 1 or 2, wherein: the signal inversion processing circuit consists of a first NPN triode, a second NPN triode, a first base resistor, a first collector resistor, a second base resistor and a second collector resistor, wherein one end of the first base resistor is used as an induction signal input end of the signal inversion processing circuit and is connected with an induction signal output end of the induction circuit, the other end of the first base resistor is connected with a base electrode of the first NPN triode, a collector electrode of the first NPN triode is respectively connected with one end of the first collector resistor and one end of the second base resistor, the other end of the first collector resistor is used as a +12V voltage input end of the signal inversion processing circuit and is connected with a voltage stabilizing port of the voltage stabilizing power supply circuit, and the other end of the second base resistor is connected with a base electrode of the second NPN triode, the collector of the second NPN triode is connected to one end of the second collector resistor, the other end of the second collector resistor is used as a VCC power supply control end of the signal inversion processing circuit and is connected to a VCC power supply input end of the non-dimming LED driving circuit, and the emitter of the first NPN triode and the emitter of the second NPN triode are both grounded.
4. An inductive LED driver circuit according to claim 3, wherein: a +12V voltage input end of the signal inversion processing circuit is connected with a +12V voltage to supply power to a base electrode of the second NPN triode, when the signal inversion processing circuit is in an induction state, an induction signal output end of the induction circuit outputs a +3.3V high level, the +3.3V high level is input to a base electrode of the first NPN triode through the first base electrode resistor, the first NPN triode is in saturated conduction, the +12V voltage supplied to the base electrode of the second NPN triode is pulled down, the second NPN triode is cut off and disconnected, at the moment, the voltage at a VCC power supply input end of the non-dimming LED driving circuit keeps an original amplitude value, the non-dimming LED driving circuit works normally, and an LED lamp in the LED lamp bead module is on; when the LED lamp is in a non-induction state, the induction signal output end of the induction circuit outputs 0V low level, the base of the first NPN triode has no base current, the first NPN triode is cut off and disconnected, the +12V voltage output by the voltage stabilizing power supply port of the voltage stabilizing power supply circuit normally supplies power to the base of the second NPN triode, the second NPN triode is in saturated conduction, the voltage at the VCC power supply input end of the non-dimming LED driving circuit is pulled down at the moment, the non-dimming LED driving circuit does not work, and the LED lamp beads in the LED lamp bead module are turned off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822181417.9U CN209861216U (en) | 2018-12-25 | 2018-12-25 | Induction LED drive circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822181417.9U CN209861216U (en) | 2018-12-25 | 2018-12-25 | Induction LED drive circuit |
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| CN209861216U true CN209861216U (en) | 2019-12-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109587888A (en) * | 2018-12-25 | 2019-04-05 | 浙江阳光照明灯具有限公司 | A kind of induction LED driving circuit |
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2018
- 2018-12-25 CN CN201822181417.9U patent/CN209861216U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109587888A (en) * | 2018-12-25 | 2019-04-05 | 浙江阳光照明灯具有限公司 | A kind of induction LED driving circuit |
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