CN210202140U - LED induction lamp control circuit based on LED constant current driving power supply - Google Patents
LED induction lamp control circuit based on LED constant current driving power supply Download PDFInfo
- Publication number
- CN210202140U CN210202140U CN201920752764.4U CN201920752764U CN210202140U CN 210202140 U CN210202140 U CN 210202140U CN 201920752764 U CN201920752764 U CN 201920752764U CN 210202140 U CN210202140 U CN 210202140U
- Authority
- CN
- China
- Prior art keywords
- led
- power supply
- induction
- driving power
- current driving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model provides a LED response lamp control circuit based on LED constant current drive power supply, including LED constant current drive power supply, still include step-down voltage stabilizing circuit, the MCU induction control module of LED response lamp, first MOS pipe drive circuit, second MOS pipe drive circuit, first MOS pipe, second MOS pipe and load module, the input positive pole of LED light source is connected to LED constant current drive power supply's output positive pole, LED constant current drive power supply supplies power for the induction control module of LED response lamp through step-down voltage stabilizing circuit, first MOS pipe grid connects induction control module through first MOS pipe drive circuit, the input negative pole of LED light source is connected to the drain electrode, source ground connection, second MOS pipe grid connects induction control module through second MOS pipe drive circuit, the drain electrode connects the contact between LED constant current drive power supply's output positive pole and the input positive pole of LED light source through load module, source ground connection. The utility model discloses a LED response lamp control circuit can prolong the life of LED light source, can improve the phenomenon of "lamp sudden strain of a muscle" simultaneously to it is with low costs.
Description
Technical Field
The utility model relates to an induction lamp control technical field, in particular to LED induction lamp control circuit based on LED constant current drive power supply.
Background
As a new green Light source, an LED (Light Emitting Diode) is attracting attention due to its advantages of high efficiency, energy saving, environmental protection, long life, and the like. Especially in the field of lighting applications, white LEDs are gradually replacing other traditional light sources and becoming the new and keen force of lighting sources.
The LED induction lamp is a novel intelligent lighting product which automatically controls the LED light source to be lightened through the MCU induction control module. At present, LED induction lamps on the market can be divided into four types according to different induction modes: 1. LED sound and light control induction lamps; 2. an LED infrared induction lamp; 3. an LED microwave radar induction lamp; 4. LED ultrasonic wave response lamp. The control circuit of the LED induction lamp is mostly as shown in fig. 1 and fig. 2, specifically:
the control circuit of the LED induction lamp shown in the figure 1 judges the induction condition through the MCU induction control module, and then controls the relay or the silicon controlled switch element to supply power or cut off the power to the alternating current input end of the LED constant current driving power supply, thereby realizing the on-off function of the LED light source. However, in the above LED sensor lamp control circuit, besides the MCU sensor control module control circuit including the acousto-optic control sensor circuit, the infrared sensor circuit or the microwave radar sensor circuit, a high-power relay or a thyristor switch element is required, and a complex AC-DC power supply circuit is also required, so that the element occupies a large volume and is high in cost.
In the control circuit of the LED induction lamp shown in fig. 2, an MOS transistor is connected in series in the LED light source, and the MOS transistor is arranged at the rear end of the LED constant current driving power supply, without adding a complicated AC-DC power supply line, a relay or a thyristor switching element, that is, the LED induction lamp control circuit has low cost. The control circuit judges the induction condition through the MCU induction control module, and then controls the on-off of the MOS tube, thereby controlling the on-off of the LED. However, in this control method, at the instant of "induction lighting" of the LED induction lamp, the LED constant current driving power supply is switched from the "no-load state" to the "load state", so that a current overshoot condition occurs, which may cause a phenomenon of "lamp flashing" visually, and the frequent overshoot of the driving current has a certain influence on the service life of the LED chip when the LED induction lamp is used as an intermittent lighting source with frequent switching.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a hardware architecture of LED response lamp control circuit for software engineer to make software engineer program the back to the MCU response control module in this hardware architecture, can make the LED response lamp with low costs, and the lamp phenomenon of dodging can not appear, can not reduce LED chip life because of the lamp dodges.
In order to solve the technical problem, the utility model provides a LED induction lamp control circuit based on LED constant current driving power supply, which comprises an LED constant current driving power supply, a DC voltage reduction and voltage stabilization circuit, an MCU induction control module of the LED induction lamp, a first MOS tube driving circuit, a second MOS tube driving circuit, a first MOS tube, a second MOS tube and a load module, wherein the output positive pole of the LED constant current driving power supply is connected with the input positive pole of an LED light source, the LED constant current driving power supply supplies power to the MCU induction control module of the LED induction lamp through the DC voltage reduction and voltage stabilization circuit, the grid of the first MOS tube is connected with a first control signal output port of the MCU induction control module through the first MOS tube driving circuit, the drain is connected with the input negative pole of the LED light source, the source is grounded, the grid of the second MOS tube is connected with a second control signal output port of the MCU induction control module through the second MOS tube driving circuit, the drain electrode is connected with a contact between the output positive electrode of the LED constant current driving power supply and the input positive electrode of the LED light source through the load module, and the source electrode is grounded.
Preferably, the DC voltage-reducing and voltage-stabilizing circuit is connected between an output anode and an output cathode of the LED constant-current driving power supply, and an input end of the MCU induction control module of the LED induction lamp is connected to an output end of the DC voltage-reducing and voltage-stabilizing circuit.
Preferably, the DC voltage reduction and stabilization circuit comprises a resistor R1, a resistor R2, a diode D1, a capacitor C1, a triode Q1 and a zener diode ZD1, wherein the anode of the diode D1 is connected to the output anode of the LED constant current driving power supply through the resistor R1, the cathode is connected to the output cathode of the LED constant current driving power supply through the resistor R2 and the capacitor C1 in sequence, the base of the triode Q1 is connected to the junction between the resistor R2 and the capacitor C1, the collector is connected to the junction between the diode D1 and the resistor R2, the emitter is connected to the input end of the MCU induction control module of the LED induction lamp, the cathode of the zener diode ZD1 is connected to the base of the triode Q1, and the anode is grounded.
Preferably, the transistor Q1 is an NPN transistor.
Preferably, the first MOS transistor and the second MOS transistor are both N-channel MOS transistors.
Preferably, the load module is a load resistor.
Preferably, the load resistor is a thermal fuse type protection resistor.
Preferably, the MCU sensing control module includes one or more of a sound and light control sensing circuit, an infrared sensing circuit, a microwave radar sensing circuit, and an ultrasonic sensing circuit.
The utility model provides a hardware structure has following beneficial effect: after a software engineer programs an MCU induction control module in a hardware structure, because a grid electrode of a second MOS tube is connected with a second control signal output port of the MCU induction control module through a second MOS tube driving circuit, a drain electrode is connected with a contact between an output anode of an LED constant-current driving power supply and an input anode of an LED light source through a load module, and a source electrode is grounded, in the process of inducing and lighting the LED, the MCU induction control module of the LED induction lamp firstly drives the load module to work so as to convert the LED constant-current driving power supply from an idle state to a loading state, and then drives the LED light source to light after a short time, thus effectively improving the overshoot of driving current, prolonging the service life of the LED light source, simultaneously improving the phenomenon of 'lamp flash', and avoiding adding a complicated AC-DC power supply circuit, a relay or a silicon controlled switch element, namely, the LED induction lamp control circuit has low cost.
Drawings
Fig. 1 is a schematic connection diagram of a conventional LED induction lamp control circuit;
FIG. 2 is a schematic connection diagram of another LED induction lamp control circuit in the prior art;
fig. 3 is a schematic connection diagram of the LED induction lamp control circuit based on the LED constant current driving power supply of the present invention;
fig. 4 is a schematic circuit diagram of the first MOS transistor driving circuit.
Description of reference numerals: 1-AC alternating current output end; 2-LED constant current driving power supply; 3-DC voltage reduction and stabilization circuit; 4-an MCU induction control module of the LED induction lamp; 5-a first MOS tube driving circuit; 6-a second MOS tube driving circuit.
Detailed Description
An LED induction lamp control circuit based on an LED constant current driving power supply is shown in figure 3 and comprises an LED constant current driving power supply 2, a DC voltage reduction and stabilization circuit 3, an MCU induction control module 4 of the LED induction lamp, a first MOS tube driving circuit 5, a second MOS tube driving circuit 6, a first MOS tube Q2 and a second MOS tube Q3, wherein the first MOS tube Q2 and the second MOS tube Q3 are both N-channel MOS tubes, the LED constant current driving power supply 2 takes electricity from an AC alternating current output end 1, an output anode VDD + of the LED constant current driving power supply 2 is connected with an input anode LED + of an LED light source (not shown in the figure) of the LED induction lamp, and an output cathode VDD-is grounded.
The DC voltage reduction and stabilization circuit 3 is connected between an output anode VDD + and an output cathode VDD-of the LED constant current driving power supply 2 and comprises a resistor R1, a diode D1, a resistor R2, a capacitor C1, a triode Q1 and a voltage stabilizing diode ZD1, wherein the anode of the diode D1 is connected with the output anode VDD + of the LED constant current driving power supply through the resistor R1, and the cathode is connected with the output cathode VDD-of the LED constant current driving power supply through the resistor R2 and the capacitor C1 in sequence; the triode Q1 is an NPN type triode, the base electrode of the triode Q1 is connected with the junction between the resistor R2 and the capacitor C1, the collector electrode of the triode Q1 is connected with the junction between the diode D1 and the resistor R2, and the emitter electrode of the triode Q1 is connected with the input end VCC of the MCU induction control module 4 of the LED induction lamp; the cathode of the voltage stabilizing diode ZD1 is connected with the base of the triode Q1, and the anode is grounded. After the current output by the LED constant current driving power supply 2 is subjected to voltage reduction and voltage stabilization through the DC voltage reduction and stabilization circuit 3, the MCU induction control module 4 of the LED induction lamp is supplied with power, so that the MCU induction control module 4 of the LED induction lamp works.
The MCU induction control module 4 of the LED induction lamp comprises one or more of an acousto-optic control induction circuit, an infrared induction circuit, a microwave radar induction circuit and an ultrasonic induction circuit, the MCU induction control module 4 of the LED induction lamp is provided with two control signal output ports I1 and I2, wherein the first control signal output port I1 is connected with the grid electrode of a first MOS tube Q2 through a first MOS tube driving circuit 5, the drain electrode of the first MOS tube Q2 is connected with an input cathode LED-of an LED light source, and the source electrode is grounded; the second control signal output port I2 is connected to the gate of the second MOS transistor Q3 through the second MOS transistor driving circuit 6, the drain of the second MOS transistor Q3 is connected to the junction between the output anode VDD + of the LED constant current driving power supply 2 and the input anode LED + of the LED light source through the thermal fuse type protection resistor R3, and the source is grounded. In this embodiment, the thermal fuse type protection resistor R3 may be replaced by a dummy resistor, which is relatively low in cost and is commonly used, but if the dummy resistor is used, the dummy resistor may generate heat and smoke when the circuit is abnormal, and the circuit may be damaged.
The specific circuit structures of the first MOS transistor driving circuit 5 and the second MOS transistor driving circuit 6 are the same, taking the first MOS transistor driving circuit 5 as an example, as shown in fig. 4, the first MOS transistor driving circuit 5 includes a resistor R4, a resistor R5, a resistor R6, and three parasitic capacitors C2, C3, and C4, wherein a gate of the first MOS transistor Q2 is connected to the first control signal output port I1 of the MCU induction control module 4 through the resistor R4, a source is grounded through the resistor R6, and a drain is connected to the input cathode LED "of the LED light source through the port O; the front end of the resistor R5 is connected with a joint between the resistor R4 and the grid electrode of the first MOS transistor Q2, and the rear end is connected with a joint between the resistor R6 and the source electrode of the first MOS transistor Q2; three parasitic capacitances C2, C3, and C4 surround the first MOS transistor Q2.
When the related sensing signals collected by the MCU sensing control module 4 of the LED sensing lamp do not satisfy the triggering condition, the first control signal output port I1 and the second control signal output port I2 output low levels respectively, that is, the gate signals of the first MOS transistor Q2 and the second MOS transistor Q3 are both low levels, the first MOS transistor Q2 and the second MOS transistor Q3 are turned off, the thermal fuse type protection resistor R3 does not work, the LED light source is extinguished, and at this time, the LED constant current driving power supply is in an idle state.
Theoretically, the output voltage of the LED constant current driving power supply is infinitely high when the LED constant current driving power supply is in no-load, but in an actual circuit, it is impossible to output infinitely high voltage, and the LED constant current driving power supply enters a protection state when the LED constant current driving power supply is in no-load, and generally outputs the highest voltage allowed by a device, and the voltage does not exceed the supply voltage of the device. As a general LED constant current driving power supply, it should be able to operate with LEDs of various common voltage classes, and therefore, its maximum output voltage should be higher than or close to the rated voltage of a common LED with a higher rated voltage. To reduce circuit complexity and circuit power consumption, the no-load voltage is typically close to, but slightly higher than, the rated voltage of the LED.
When the related sensing signals collected by the MCU sensing control module 4 of the LED sensing lamp satisfy the trigger condition, the second control signal output port I2 outputs a high level (the output time is set to 0.1 second), that is, the gate signal of the second MOS transistor Q3 changes from a low level to a high level, the second MOS transistor Q3 is turned on, the thermal fuse type protection resistor R3 works, at this time, the LED constant current driving power supply 2 changes from the "no-load state" to the "load state", that is, the LED constant current driving power supply 2 starts to start, at this time, the control signal port I1 is still at a low level, that is, the gate signal of the first MOS transistor Q2 is still at a low level, the first MOS transistor Q2 is still turned off, and the LED light source still remains off. After the preset time of 0.1 second, the first control signal output port I1 of the MCU sensing control module 4 outputs a high level, that is, the gate signal of the first MOS transistor Q2 changes from a low level to a high level, the first MOS transistor Q2 is turned on, and the LED light source is turned on, and at the same time, the second control signal output port I2 changes to an output low level, that is, the gate signal of the second MOS transistor Q3 changes from a high level to a low level, the second MOS transistor Q3 is turned off, and the thermal fuse protection resistor R3 does not work.
In this embodiment, at the instant of the LED sensing lamp being "sensed to light up", the MCU sensing control module 4 first sends a control signal to control the thermal fuse type protection resistor R3 to operate for a short time, at this time, the LED constant current driving power supply is turned from "no-load state" to "load state", and then the MCU sensing control module 4 controls the LED light source to light up, and at the same time, stops the thermal fuse type protection resistor R3 from operating. Therefore, the LED light source is equivalently subjected to a soft start process before the LED light source senses the lighting, so that the current overshoot caused by the fact that the LED drives the constant current power supply to be converted from the no-load state to the loading state is avoided, the service life of the LED light source is prolonged, and the visual phenomenon that the LED light source flashes at the moment of sensing is improved. In addition, the LED induction lamp control circuit of the embodiment does not need to be additionally provided with a complex AC-DC power supply circuit, a relay or a silicon controlled switch element, namely, the LED induction lamp control circuit is low in cost.
Claims (8)
1. The utility model provides a LED response lamp control circuit based on LED constant current drive power supply, includes LED constant current drive power supply, characterized by: the LED constant-current driving power supply supplies power to the MCU induction control module of the LED induction lamp through the DC voltage reduction and voltage stabilization circuit, a grid electrode of the first MOS tube is connected with a first control signal output port of the MCU induction control module through the first MOS tube driving circuit, a drain electrode of the first MOS tube is connected with an input cathode of the LED light source, a source electrode of the first MOS tube is grounded, a grid electrode of the second MOS tube is connected with a second control signal output port of the MCU induction control module through the second MOS tube driving circuit, and the drain electrode of the second MOS tube is connected with a contact point between the output anode of the LED constant-current driving power supply and the input anode of the LED light source through the load module, and the source electrode of the second MOS tube is grounded.
2. The LED induction lamp control circuit based on the LED constant-current driving power supply as claimed in claim 1, wherein: the DC voltage reduction and stabilization circuit is connected between the output anode and the output cathode of the LED constant-current driving power supply, and the input end of the MCU induction control module of the LED induction lamp is connected with the output end of the DC voltage reduction and stabilization circuit.
3. The LED induction lamp control circuit based on the LED constant-current driving power supply as claimed in claim 2, wherein: the DC voltage reduction and stabilization circuit comprises a resistor R1, a resistor R2, a diode D1, a capacitor C1, a triode Q1 and a voltage stabilizing diode ZD1, wherein the anode of the diode D1 is connected with the output anode of the LED constant current driving power supply through the resistor R1, the cathode of the diode D1 is connected with the output cathode of the LED constant current driving power supply through the resistor R2 and the capacitor C1 in sequence, the base of the triode Q1 is connected with the junction between the resistor R2 and the capacitor C1, the collector of the triode D1 is connected with the junction between the resistor R2, the emitter of the triode D1 is connected with the input end of the MCU sensing control module of the LED sensing lamp, the cathode of the voltage stabilizing diode ZD1 is.
4. The LED induction lamp control circuit based on the LED constant-current driving power supply as claimed in claim 3, wherein: the transistor Q1 is an NPN type transistor.
5. The LED induction lamp control circuit based on the LED constant-current driving power supply as claimed in claim 1, wherein: the first MOS tube and the second MOS tube are both N-channel MOS tubes.
6. The LED induction lamp control circuit based on the LED constant-current driving power supply as claimed in claim 1, wherein: the load module is a load resistor.
7. The LED induction lamp control circuit based on the LED constant-current driving power supply as claimed in claim 6, wherein: the load resistor is a thermal fuse type protection resistor.
8. The LED induction lamp control circuit based on the LED constant-current driving power supply as claimed in claim 1, wherein: the MCU induction control module comprises one or more of a sound-light control induction circuit, an infrared induction circuit, a microwave radar induction circuit and an ultrasonic induction circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920752764.4U CN210202140U (en) | 2019-05-23 | 2019-05-23 | LED induction lamp control circuit based on LED constant current driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920752764.4U CN210202140U (en) | 2019-05-23 | 2019-05-23 | LED induction lamp control circuit based on LED constant current driving power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210202140U true CN210202140U (en) | 2020-03-27 |
Family
ID=69874946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920752764.4U Active CN210202140U (en) | 2019-05-23 | 2019-05-23 | LED induction lamp control circuit based on LED constant current driving power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210202140U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112770457A (en) * | 2021-02-02 | 2021-05-07 | 惠州雷士光电科技有限公司 | Power supply control circuit and LED lighting equipment |
-
2019
- 2019-05-23 CN CN201920752764.4U patent/CN210202140U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112770457A (en) * | 2021-02-02 | 2021-05-07 | 惠州雷士光电科技有限公司 | Power supply control circuit and LED lighting equipment |
| CN112770457B (en) * | 2021-02-02 | 2023-03-10 | 惠州雷士光电科技有限公司 | Power supply control circuit and LED lighting equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110149747B (en) | Driving circuit for directly supplying power to LED lamp tube by power adapter and design method | |
| CN109769321B (en) | LED lamp circuit with delayed light-off function | |
| CN204031553U (en) | A kind of LED drive circuit and soft starting circuit thereof | |
| CN101203080A (en) | Solar streetlight control circuit | |
| CN116916489A (en) | LED light intelligent controller | |
| CN201571238U (en) | LED constant current switch power circuit | |
| US9814107B2 (en) | Drive circuit and illumination device comprising the drive circuit | |
| CN210202140U (en) | LED induction lamp control circuit based on LED constant current driving power supply | |
| CN215912251U (en) | Low-power-consumption stroboflash-free induction LED lamp control circuit and LED lamp | |
| CN106982492B (en) | Dimmer with overload protection circuit | |
| CN210781451U (en) | Control circuit of equipment power supply | |
| CN212910120U (en) | LED power supply dimming circuit | |
| CN211352504U (en) | LED lamp control circuit capable of cutting off output current and achieving rapid shutdown | |
| CN212992001U (en) | Light-operated boost circuit with turn-off function | |
| CN113630937A (en) | Power factor switching circuit, LED lamp driving module and working method thereof | |
| CN203206567U (en) | LED lamp adjustment and control system | |
| CN107197570B (en) | Control circuit for adjusting light source brightness by detecting power switch action | |
| JP2011142043A (en) | Lighting device | |
| CN110996452A (en) | Gesture induction lamp and control circuit thereof | |
| CN218456546U (en) | Dimming turn-off control circuit of non-isolated power supply and non-isolated power supply | |
| CN219718533U (en) | Control circuit for quick power-off | |
| CN216960262U (en) | Control circuit for eliminating LED power supply shutdown flicker | |
| CN211152247U (en) | Energy-conserving L ED industrial and mining lamp circuit of high light efficiency | |
| CN214315688U (en) | LED drive circuit and LED lamp | |
| CN221202811U (en) | Short-circuit protection circuit, LED driving power supply and lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |