LED tree-embracing lamp

Abstract

The utility model relates to the technical field of lamps, and discloses an LED (light-emitting diode) tree-embracing lamp, which aims to solve the technical problem of poor working stability of the lamps caused by environmental interference in the conventional products, and is characterized in that a current detection circuit is arranged between a current detection signal input end of a resonance controller U1 and the other end of a primary side coil of a transformer T2; the first series resistance circuit comprises a resistor R52 and a resistor R67 which are connected in series, and a capacitor C34 is connected between the first series resistance circuit and the anode of the diode D1; the cathode of the diode D1 is connected with an RC filter circuit, the RC filter circuit is provided with a resistor R69 and a capacitor C35 which are connected in series, the current detection signal input end of the resonance controller U1 is grounded through the resistor R69 and the capacitor C35 in sequence, and the capacitor C35 is connected with a resistor R70 in parallel; the anode of the diode D6 is grounded, and the cathode of the diode D6 is connected with the anode of the diode D1. Accurate control, rapid and accurate detection and adjustment of the driving current are realized through the current detection circuit, and driving abnormity caused by environmental interference is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lamp technical field especially relates to a kind of LED tree-hugging lamps. BACKGROUND

[0002] Tree-hugging lamp is a kind of lamp specially used for outdoor lighting and landscape beautification, usually around tree or other columnar object installation, provides efficient lighting through LED light source, while paying attention to decoration effect.Tree-hugging lamp is widely used in park, square, road both sides etc.Situation, not only can play the role of lighting, also adds artistic feeling for environment.The design of traditional tree-hugging lamp is mainly single power supply circuit and simple control mode, it is difficult to realize efficient, stable operation in complex outdoor environment.

[0003] In outdoor use scene, due to power supply voltage fluctuation, environmental interference etc.Factors, existing tree-hugging lamp circuit is prone to power supply instability or power supply ripple too high problem in long time operation, leading to lamp performance decline or even failure.

[0004] In traditional design, the processing of current detection and input voltage detection signal is simple, lacks effective protection measures, is easily influenced by high-frequency interference and external noise, further reduces the reliability of circuit. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of LED tree-hugging lamp, aiming at the lack of prior art, solve the technical problem that existing product causes lamp work stability to be poor due to environmental interference.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the LED tree-hugging lamp provided by the utility model is as follows:

[0007] A kind of LED tree-hugging lamp is provided with drive circuit, drive circuit includes resonance controller U1, NMOS tube Q3, NMOS tube Q9 and transformer T2, the high side gate drive floating ground terminal of resonance controller U1 is connected with the one end of the primary side coil of transformer T2, current detection circuit is arranged between the current detection signal input end of resonance controller U1 and the other end of the primary side coil of transformer T2, and current detection circuit includes first series resistance circuit, capacitor C34, diode D1, diode D2 and RC filter circuit;

[0008] First series resistance circuit includes series resistance R52 and R67, resistance R52 is connected with resistance R53 in parallel, and resistance R67 is connected with resistance R68 in parallel;

[0009] Capacitor C34 is connected between first series resistance circuit and the anode of diode D1;

[0010] The cathode of the diode D1 is connected to an RC filter circuit, the RC filter circuit is provided with a resistor R69 and a capacitor C35 connected in series, the current detection signal input end of the resonance controller U1 is connected to ground in sequence through the resistor R69 and the capacitor C35, and the capacitor C35 is connected in parallel with a resistor R70; the anode of a diode D6 is connected to ground, and the cathode of the diode D6 is connected to the anode of the diode D1.

[0011] By optimizing the design of the driving circuit, the working stability of the lamp is improved, and the precise control of the driving current is realized through the current detection circuit. The first series resistance circuit, the capacitor C34, the diodes D1 and D2 and the RC filter circuit contained in the current detection circuit can quickly and accurately detect and adjust the current signal, avoiding driving abnormalities caused by environmental interference. In addition, the combination of the resistor R69 and the capacitor C35 in the RC filter circuit, and the parallel design of the capacitor C35 and the resistor R70 further enhance the anti-interference ability of the circuit and the stability of the signal, ensuring that the lamp can still operate efficiently and reliably in complex environments, thereby solving the technical problem of poor working stability of the existing products caused by environmental interference, and improving the actual use effect and adaptability of the product.

[0012] Further, the transformer T2 is provided with two secondary coils, namely a first secondary coil and a second secondary coil, and the second ends of the two secondary coils are connected and grounded through a resistor R48.

[0013] The first end of the first secondary coil is connected to the anode of the diode D2, and the first end of the second secondary coil is connected to the anode of the diode D5. The cathodes of the diodes D2 and D5 are connected to each other and connected to the second end of the secondary coil through a capacitor C1.

[0014] The cathode of the diode D5 is connected to the first end of the inductor L1, and the second end of the inductor L1 is used to supply power to the LED in the tree-hugging lamp and is grounded through a capacitor C3.

[0015] The first end of the inductor L1 is also connected to the second end of the secondary coil through a capacitor C2, forming an LC filter network.

[0016] The efficiency and stability of the driving circuit are further enhanced by setting two secondary side coils (a first secondary side coil and a second secondary side coil) in the transformer T2 and designing the related circuit. The second ends of the two secondary side coils are connected and grounded through the resistor R48, effectively reducing the interference of the ground current; the connection mode of the first secondary side coil with the diode D2 and the second secondary side coil with the diode D5 allows the two secondary side coils to be rectified respectively and merged through the cathodes of the diodes D2 and D5, achieving a more stable output voltage; the cathode of the diode D5 and the power supply branch composed of the inductor L1 and the capacitor C3 provide a stable DC power supply for the LED, and the output current is filtered through the LC filter network (composed of the inductor L1 and the capacitor C2), further reducing the influence of current ripple on the operation of the LED, thereby ensuring the brightness stability and service life of the LED light source. Not only does it improve the anti-interference ability of the circuit, but also optimizes the utilization rate and conversion efficiency of the output electric energy, providing a guarantee for the efficient operation of the tree-hugging lamp in complex environments.

[0017] Further, the drain of the NMOS tube Q9 is used for inputting a first DC power supply, the source is connected with the drain of the NMOS tube Q3, and the source of the NMOS tube Q3 is grounded;

[0018] The low-end gate drive output end of the resonance controller U1 is connected with the gate of the NMOS tube Q3 through the resistor R50, and the high-end gate drive output end of the resonance controller U1 is connected with the gate of the NMOS tube Q9 through the resistor R9;

[0019] The resistor R50 is connected with the diode D4 in parallel, the anode of the diode D4 is connected with the gate of the NMOS tube Q3, and the cathode of the diode D4 is connected with the low-end gate drive output end; the resistor R9 is connected with the diode D3 in parallel, the anode of the diode D3 is connected with the gate of the NMOS tube Q9, and the cathode is connected with the high-end gate drive output end;

[0020] The high-end gate drive floating ground end of the resonance controller U1 is connected with the source of the NMOS tube Q9.

[0021] The drain of the NMOS tube Q9 is used for inputting a first DC power supply, the source is connected with the drain of the NMOS tube Q3, and the source of the NMOS tube Q3 is grounded; The low-end and high-end gate drive output ends of the resonance controller U1 control the gates of the NMOS tubes Q3 and Q9 through the resistors R50 and R9 respectively, realizing precise switch control; the diodes D4 and D3 connected with the resistors R50 and R9 in parallel play a role in rapid discharge in the transmission of the driving signal, significantly shortening the turn-off time of the NMOS tube and improving the switching frequency and efficiency. The high-end gate drive floating ground end of the resonance controller U1 is connected with the source of the NMOS tube Q9, further optimizing the stability of the high-end driving signal and avoiding the influence of floating ground potential fluctuation on the driving performance.

[0022] Further, the input voltage detection end of the resonance controller U1 is connected to the power supply input end through a second series resistance circuit, the second series resistance circuit comprises a resistor R73 and a resistor R74 connected in series, the resistor R74 is connected in parallel with a capacitor C41, one end of the resistor R74 is grounded, and the other end of the resistor R74 is connected to the input voltage detection end of the resonance controller U1.

[0023] The second series resistance circuit is composed of the resistor R73 and the resistor R74 connected in series, and the resistor R74 is connected in parallel with the capacitor C41, so that the input voltage signal can be effectively filtered during voltage detection, high-frequency noise and transient interference are suppressed, and therefore the voltage signal received by the resonance controller U1 is more stable and accurate.

[0024] The LED tree-hugging lamp provided by the utility model has the following advantages:

[0025] The efficient resonance controller driving circuit, the optimized circuit design, and the perfect current detection and input voltage monitoring mechanism not only improve the power supply efficiency and output current stability, but also enhance the anti-interference ability of the circuit, significantly improve the overall performance of the tree-hugging lamp, and solve the key pain points in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The resonance controller peripheral circuit diagram in the tree-hugging lamp provided by the utility model is provided.

[0027] Figure 2 The direct current output circuit diagram in the tree-hugging lamp provided by the utility model is provided. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below in combination with the drawings and examples.

[0029] Referring to Figure 1 and Figure 2 An LED tree-hugging lamp mainly comprises a resonance controller U1, an NMOS tube Q3, an NMOS tube Q9 and a transformer T2, the drain electrode of the NMOS tube Q9 is used for inputting a first direct current power supply, the source electrode of the NMOS tube Q9 is connected to the drain electrode of the NMOS tube Q3, and the source electrode of the NMOS tube Q3 is grounded.

[0030] The 11th end and the 15th end of the resonance controller U1 are low-end gate drive output ends and high-end gate drive output ends, the low-end gate drive output end is connected with the gate of the NMOS tube Q3 through the resistor R50, and the high-end gate drive output end is connected with the gate of the NMOS tube Q9 through the resistor R9.

[0031] The resistor R50 is connected with the diode D4 in parallel, the anode of the diode D4 is connected with the gate of the NMOS tube Q3, and the cathode of the diode D4 is connected with the low-end gate drive output end; the resistor R9 is connected with the diode D3 in parallel, the anode of the diode D3 is connected with the gate of the NMOS tube Q9, and the cathode of the diode D4 is connected with the low-end gate drive output end.

[0032] The resistor R50 and the resistor R9 are used to limit the gate current and optimize the drive signal respectively. The diodes D4 and D3 are connected in parallel on the gate resistor, used to quickly release the charge of the gate and shorten the switching time. Through the accurate control of the resonance controller, the high-efficiency switching is realized, and the switching loss is reduced. The diodes D3 and D4 shorten the turn-off time, and improve the efficiency and response speed of the overall circuit.

[0033] The resistor R49 is connected between the source and the gate of the NMOS tube Q9, and the resistor R51 is connected between the source and the gate of the NMOS tube Q3.

[0034] The 14th end of the resonance controller U1 is a floating ground end of the high-end gate drive, connected with the source of the NMOS tube Q9, and provides a current return loop for the high-end gate drive current. The floating ground end of the high-end gate drive is connected with the 1st end of the primary coil of the transformer T2.

[0035] The 12th end of the resonance controller U1 is a power input end, the 10th end of the resonance controller U1 is a ground end, and the 6th end of the resonance controller U1 is a current detection signal input end.

[0036] The current detection signal input end is connected with a current detection circuit, the current detection circuit comprises a first series resistance circuit, one end of the first series resistance circuit is connected with the 2nd end of the primary coil of the transformer T2 and grounded through the capacitor C33, the other end of the first series resistance circuit is connected with the current detection signal input end of the resonance controller U1 in sequence through the capacitor C34, the diode D1, the resistor R69, the anode of the diode D1 is connected with the capacitor C34, the cathode of the diode D1 is connected with the resistor R69, and the cathode of the diode D1 is also connected with the cathode of the diode D6, the anode of the diode D6 is grounded; the current detection signal input end is grounded in sequence through the resistor R69 and the capacitor C35, and the capacitor C35 is connected with the resistor R70 in parallel.

[0037] The first series resistance circuit is provided with two series resistors R52 and R67, the resistor R52 is connected in parallel with a resistor R53, and the resistor R67 is connected in parallel with a resistor R68.

[0038] The current detection circuit detects the primary current of the transformer T2 through the first series resistance circuit, and the detection current signal is transmitted to the current detection signal input end of the resonance controller U1 through the diode D1 and the resistor R69 after being filtered through the C34. The diode D6 provides reverse protection for the current detection signal, and the resistor R69 and the capacitor C35 form an RC filter circuit to further optimize the signal. Through the RC filter circuit, the noise interference in the current detection signal is reduced, and the detection accuracy is improved.

[0039] The 7th end of the resonance controller U1 is an input voltage detection end, and is connected with a second series resistance circuit. The second series resistance circuit includes two series resistors R73 and R74. The resistor R73 is connected with the power input end of the resonance controller U1, one end of the resistor R74 is grounded, and the other end of the resistor R74 is connected with the input voltage detection end. The resistor R74 is connected in parallel with a capacitor C41.

[0040] The input voltage detection circuit is composed of the resistors R73 and R74, and sends the input voltage signal to the 7th end of the U1 after being divided. The capacitor C41 is connected in parallel with the R74, and plays a signal filtering role to reduce the interference of high-frequency noise. Real-time monitoring of the input voltage is realized to ensure that the circuit works within a reasonable voltage range. The voltage dividing circuit cooperates with the filter capacitor C41 to ensure the stability and accuracy of the input voltage signal. The influence of excessively high or low input voltage on the resonance controller and the overall circuit is prevented.

[0041] The 1st end to the 5th end and the 8th end of the resonance controller U1 are conventionally set ends, and will not be described in detail.

[0042] The circuit is controlled by the accurate resonance controller to realize efficient driving of the NMOS tube and the transformer, and cooperates with the perfect current detection and input voltage detection mechanism to improve the safety and stability of the circuit. The overall design simplifies the circuit structure, improves the system efficiency, and meets the application requirements of high efficiency, stability and reliability.

[0043] Referring to Figure 2, the transformer T2 is provided with two secondary coils, defined as a first secondary coil and a second secondary coil, the second ends of the first secondary coil and the second secondary coil are connected together and grounded through a resistor R48; the first end of the first secondary coil is connected to the anode of a diode D2, the first end of the second secondary coil is connected to the anode of a diode D5, the cathodes of the diodes D2 and D5 are connected together, the cathodes of the two diodes are connected to the second ends of the two secondary coils through a capacitor C1, the cathode of the diode D5 is connected to the first end of an inductor L1, the second end of the inductor L1 is used as the positive terminal of a second DC power supply for supplying power to the LED in the tree-hugging lamp, the first end of the inductor L1 is connected to the second ends of the two secondary coils through a capacitor C2, and the second end of the inductor L1 is grounded through a capacitor C3.

[0044] In Figure 2 In the circuit shown in the figure, the two secondary coils of the transformer T2 are defined as a first secondary coil and a second secondary coil, and their second ends are connected together and grounded through a resistor R48 to form a stable reference point. The first end of the first secondary coil is connected to the circuit through the anode of a diode D2, and the first end of the second secondary coil is connected to the circuit through the anode of a diode D5. The cathodes of the two diodes are connected together and form a loop with the common end of the secondary coils through a capacitor C1. The diodes D2 and D5 rectify the output current of the first secondary coil and the second secondary coil respectively, ensuring the unidirectionality of the output current and providing a stable DC voltage for the subsequent circuit. The rectified DC current passes through an inductor L1, with the first end connected to the cathode of the diode D5 and the second end used to supply power to the LED in the tree-hugging lamp. The second end of the inductor L1 is also connected to the second ends of the secondary coils through a capacitor C2, and the second end of the inductor L1 is also grounded through a capacitor C3. C2 and C3 together form a filter circuit. The beneficial effects of this design are that through the symmetrical design of the secondary coils and the efficient rectification of the diodes, the stability and efficiency of the output current are achieved; the capacitor C1 smooths the rectified current, suppresses the high-frequency ripple, and further improves the output voltage quality; the combination of the inductor L1 and the filter capacitor forms an LC filter network, effectively reducing the noise interference of the DC output and improving the stability and power quality of the circuit; the power supply capability to the LED is enhanced, ensuring the reliability and efficiency of the tree-hugging lamp operation, and providing a durable and stable power supply support for the lamp.

[0045] In conclusion, the utility model provides a kind of LED tree-hugging lamp, accurate control is realized to NMOS pipe and transformer by the resonance controller U1 high-efficiency drive, while cooperating optimized current detection circuit and input voltage detection circuit, the safety and operating stability of circuit are ensured.Current detection circuit passes through filter and protection design, effectively suppresses signal noise interference, improves detection accuracy, and input voltage detection circuit passes through voltage division and filter structure, ensures the stability of voltage signal, prevents voltage too high or too low from causing influence to system.Transformer T2's secondary side design adopts symmetrical structure, cooperates with efficient rectification diode and LC filter network, not only improves the stability of output current and DC power quality, but also effectively suppresses high-frequency ripple and noise, provides high efficiency and high reliability for the power supply of LED in tree-hugging lamp.

[0046] The above only is the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement and improvement etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A tree-hugging LED lamp provided with a driving circuit, the driving circuit comprising a resonance controller U1, an NMOS tube Q3, an NMOS tube Q9 and a transformer T2, characterized in that, The high-end gate drive floating ground end of the resonance controller U1 is connected with one end of the primary coil of the transformer T2, and a current detection circuit is arranged between the current detection signal input end of the resonance controller U1 and the other end of the primary coil of the transformer T2, and the current detection circuit comprises a first series resistance circuit, a capacitor C34, a diode D1, a diode D2 and an RC filter circuit; The first series resistance circuit comprises resistors R52 and R67 connected in series, the resistor R52 is connected in parallel with a resistor R53, and the resistor R67 is connected in parallel with a resistor R68; The capacitor C34 is connected between the first series resistance circuit and the anode of the diode D1. The cathode of the diode D1 is connected with the RC filter circuit, the RC filter circuit is provided with a resistor R69 and a capacitor C35 connected in series, the current detection signal input end of the resonance controller U1 is connected to ground in sequence through the resistor R69 and the capacitor C35, and the capacitor C35 is connected in parallel with a resistor R70; the anode of a diode D6 is grounded, and the cathode of the diode D6 is connected with the anode of the diode D1.

2. The tree-hugging LED lamp of claim 1, wherein, The transformer T2 is provided with two secondary coils, namely a first secondary coil and a second secondary coil, and the second ends of the two secondary coils are connected and grounded through a resistor R48; The first end of the first secondary coil is connected with the anode of the diode D2, the first end of the second secondary coil is connected with the anode of the diode D5, the cathodes of the diodes D2 and D5 are connected with each other, and the second ends of the two secondary coils are connected through a capacitor C1; The cathode of the diode D5 is connected with the first end of an inductor L1, and the second end of the inductor L1 is used for supplying power to the LED in the tree-hugging lamp and is grounded through a capacitor C3; The first end of the inductor L1 is also connected with the second end of the secondary coil through a capacitor C2, forming an LC filter network.

3. The tree-hugging LED lamp of claim 1, wherein, The drain of the NMOS tube Q9 is used for inputting a first direct current power supply, the source is connected with the drain of the NMOS tube Q3, and the source of the NMOS tube Q3 is grounded; The low-end gate drive output end of the resonance controller U1 is connected with the gate of the NMOS tube Q3 through a resistor R50, and the high-end gate drive output end of the resonance controller U1 is connected with the gate of the NMOS tube Q9 through a resistor R9; The resistor R50 is connected in parallel with a diode D4, the anode of the diode D4 is connected with the gate of the NMOS tube Q3, and the cathode of the diode D4 is connected with the low-end gate drive output end; the resistor R9 is connected in parallel with a diode D3, the anode of the diode D3 is connected with the gate of the NMOS tube Q9, and the cathode is connected with the high-end gate drive output end; The high-end gate drive floating ground end of the resonance controller U1 is connected with the source of the NMOS tube Q9.

4. The tree-hugging light of claim 3, wherein, The input voltage detection end of the resonance controller U1 is connected with the power supply input end through a second series resistance circuit, the second series resistance circuit comprises resistors R73 and R74 connected in series, the resistor R74 is connected in parallel with a capacitor C41, one end of the resistor R74 is grounded, and the other end of the resistor R74 is connected with the input voltage detection end of the resonance controller U1.

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