Control circuit of floor lamp

Abstract

The utility model discloses a floor lamp control circuit, which comprises a central processing unit, a 12-36V isolation type adapter, a DC-DC step-down circuit and an H bridge control LED brightness color temperature circuit, the input end of the 12-36V isolation type adapter is connected with commercial power, the output end of the 12-36V isolation type adapter is connected with the input end of the DC-DC step-down circuit, and the output end of the DC-DC step-down circuit is connected with the output end of the H bridge control LED brightness color temperature circuit. The output end of the DC-DC step-down circuit is connected with the central processing unit, two PWM control ports of the central processing unit are connected with two PWM ports of the H-bridge control LED brightness color temperature circuit, the H-bridge control LED brightness color temperature circuit is controlled to be switched on through the two PWM control ports, and the output end of the LED brightness color temperature circuit is connected with more than one LED lamp set in parallel. And the output of the LED brightness color temperature circuit is connected in parallel with more than one LED lamp group. The circuit with the structure improves the safety.

Description

Technical Field

[0001] The utility model belongs to the technical field related to LED lamp circuit control, and particularly relates to a control circuit for a floor lamp. Background Art

[0002] Floor lamps on the market generally have LED bulbs with 100-220V AC input installed directly on the lamp holder. The lamp holder itself has high voltage. When people are installing the bulb or using the bulb, the human body may touch the high-voltage part inside the lamp holder, causing fatal damage to the human body, so improvement is needed. Utility Model Content

[0003] The utility model aims to provide a control circuit for a floor lamp, which solves the problem of installation risks in existing floor lamps.

[0004] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0005] The utility model is a control circuit of a floor lamp, comprising a central processing unit, a 12-36V isolation type adapter, a DC-DC step-down circuit and an H-bridge control circuit for controlling LED brightness and color temperature. The input end of the 12-36V isolation type adapter is connected to the mains, the output end of the 12-36V isolation type adapter is connected to the input end of the DC-DC step-down circuit, the output end of the DC-DC step-down circuit is connected to the central processing unit, two PWM control ports of the central processing unit are connected to two PWM ports of the H-bridge control circuit for controlling LED brightness and color temperature, the H-bridge control circuit for controlling LED brightness and color temperature is turned on through the two PWM control ports, the output of the LED brightness and color temperature circuit is connected in parallel with one or more LED lamp groups, and the output of the LED brightness and color temperature circuit 4 is connected in parallel with one or more LED lamp groups 5.

[0006] Preferably, the H-bridge control LED brightness and color temperature circuit includes a +24V power supply voltage VCC, a first NPN transistor Q1, a second PNP transistor Q2, a third NPN transistor Q3, a fourth PNP transistor Q4, a first P-channel long effect transistor P1, a second N-channel long effect transistor P2, a third P-channel long effect transistor P3, a fourth N-channel long effect transistor P4, a fifth N-channel long effect transistor P5, and a sixth N-channel long effect transistor P6, wherein the S pin of the sixth N-channel long effect transistor P6 is connected to the ground terminal GND, one end of the G pin of the sixth N-channel long effect transistor P6 is connected to the third resistor R3, and the other end of the third resistor R3 is connected to a PWM control port of a central processing unit as a PWM interface 2, the D pin of the sixth N-channel long effect transistor P6 is connected to the base of the second PNP transistor Q2 through the second resistor R2, the collector of the second PNP transistor Q2 is connected to the ground terminal GND through the fourth resistor R4, and the second PNP transistor The emitter of the transistor Q2 is connected to the emitter of the first NPN transistor Q1, the base of the first NPN transistor Q1 is connected to the base of the second PNP transistor Q2, the collector of the first NPN transistor Q1 is connected to the +24V power supply voltage VCC, the +24V power supply voltage VCC is connected to the G pin of the first P-channel long effect transistor P1 through the fifteenth resistor R15, the G pin of the first P-channel long effect transistor P1 is also connected to the emitter of the second PNP transistor Q2 through the sixteenth resistor R16, the S pin of the first P-channel long effect transistor P1 is connected to the +24V power supply voltage VCC, the D pin of the first P-channel long effect transistor P1 is connected to the D pin of the second N-channel long effect transistor P2 and serves as a pad interface A, the S pin of the second N-channel long effect transistor P2 is connected to the ground terminal GND, the G pin of the second N-channel long effect transistor P2 is connected to one end of the fifth resistor R5, and the other end of the fifth resistor R5 is connected to another PWM control port of the central processing unit as a PWM interface 1;

[0007] The S pin of the fifth N-channel long effect transistor P5 is connected to the ground terminal GND, one end of the G pin of the fifth N-channel long effect transistor P5 is connected to the fourteenth resistor R14, the other end of the fourteenth resistor R14 is used as a PWM interface to connect a PWM control port of the central processing unit, the D pin of the fifth N-channel long effect transistor P5 is connected to the base of the fourth PNP transistor Q4 through the twelfth resistor R12, the collector of the fourth PNP transistor Q4 is connected to the ground terminal GND through the seventeenth resistor R17, the emitter of the fourth PNP transistor Q4 is connected to the emitter of the third NPN transistor Q3, the base of the third NPN transistor Q3 is connected to the base of the fourth PNP transistor Q4, and the collector of the third NPN transistor Q3 is connected to the base of the fourth PNP transistor Q4. Connect to +24V power supply voltage VCC, the +24V power supply voltage VCC is connected to the G pin of the third P-channel long effect transistor P3 through the tenth resistor R10, the G pin of the third P-channel long effect transistor P3 is also connected to the emitter of the fourth PNP transistor Q4 through the eleventh resistor R11, the S pin of the third P-channel long effect transistor P3 is connected to the +24V power supply voltage VCC, the D pin of the third P-channel long effect transistor P3 is connected to the D pin of the fourth N-channel long effect transistor P4 and serves as a pad interface B, the S pin of the fourth N-channel long effect transistor P4 is connected to the ground terminal GND, the G pin of the fourth N-channel long effect transistor P4 is connected to one end of the eighth resistor R8, and the other end of the eighth resistor R8 is used as PWM interface 2 to connect to another PWM control port of the central processing unit.

[0008] Preferably, a first resistor R1 is connected between the base of the second PNP transistor Q2 and the collector of the first NPN transistor Q1, a sixth resistor R6 is connected between the G pin and the S pin of the second N-channel long-effect transistor P2, a twelfth resistor R12 is connected between the base of the fourth PNP transistor Q4 and the collector of the third NPN transistor Q3, and a ninth resistor R9 is connected between the G pin and the S pin of the fourth N-channel long-effect transistor P4.

[0009] Preferably, a touch button control interface is also electrically connected to the central processing unit.

[0010] Preferably, a 2.4G RF remote control signal terminal is also electrically connected to the central processor.

[0011] Preferably, the central processor is also electrically connected to a mobile phone Bluetooth signal terminal.

[0012] The utility model has the following beneficial effects: a control panel with two wires can be used to set various styles of low-voltage bulbs in the later stage, and two wires (i.e., soldering pad interface B and soldering pad interface A) connected from the control panel are connected to the screw mouth of the low-voltage bulb to realize the control of the color temperature and brightness of the bulb, and the whole circuit uses a 12-36V isolated adapter DC power supply, so that our control panel and bulbs are both at safe voltages, and there is no risk of high-voltage electric shock during use by the user end, and the installation method is the same as that of an ordinary high-voltage bulb. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a principle block diagram of a control circuit of a floor lamp in Example 1;

[0014] Figure 2 The circuit schematic diagram of the H-bridge circuit for controlling LED brightness and color temperature in Example 1;

[0015] Figure 3 This is a principle block diagram of a control circuit of a floor lamp in Example 2;

[0016] Figure 4 This is a principle block diagram of a control circuit of a floor lamp in Example 3;

[0017] Figure 5 This is a principle block diagram of a control circuit of a floor lamp in Example 4;

[0018] Figure 6 This is a schematic diagram of the circuit structure when several components of the circuit are integrated together.

[0019] Figure numerals: central processing unit 1, 12-36V isolated adapter 2, DC-DC step-down circuit 3, H-bridge control LED brightness and color temperature circuit 4, LED light group 5, touch button control interface 6, 2.4G RF remote control signal terminal 7, mobile phone Bluetooth signal terminal 8. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example 1

[0022] See also Figure 1-2As shown, a control circuit of a floor lamp disclosed in this embodiment includes a central processor 1, a 12-36V isolated adapter 2, a DC-DC buck circuit 3, and an H-bridge control LED brightness color temperature circuit 4. The input end of the 12-36V isolated adapter 2 is connected to the mains, the output end of the 12-36V isolated adapter 2 is connected to the input end of the DC-DC buck circuit 3, the output end of the DC-DC buck circuit 3 is connected to the central processor 1, and the two PWM control ports of the central processor 1 are connected to the two PWM ports of the H-bridge control LED brightness color temperature circuit 4. The H-bridge control LED brightness color temperature circuit 4 is controlled to be turned on through the two PWM control ports. The advantage of using the DC-DC buck circuit 3 in this structure is that the buck efficiency is high, and there is basically no temperature rise compared to the LDO buck, so that the voltage is first bucked to 5V and then bucked to 3.3V through the LDO, and the components DPS908, XN297LBW, and TM1650 are all powered from here.

[0023] Preferably, the H-bridge control LED brightness and color temperature circuit 4 includes a +24V power supply voltage VCC, a first NPN transistor Q1, a second PNP transistor Q2, a third NPN transistor Q3, a fourth PNP transistor Q4, a first P-channel long effect transistor P1, a second N-channel long effect transistor P2, a third P-channel long effect transistor P3, a fourth N-channel long effect transistor P4, a fifth N-channel long effect transistor P5, and a sixth N-channel long effect transistor P6, wherein the S pin of the sixth N-channel long effect transistor P6 is connected to the ground terminal GND, one end of the G pin of the sixth N-channel long effect transistor P6 is connected to the third resistor R3, and the other end of the third resistor R3 is connected to a PWM control port of the central processor 1 as a PWM interface 2, the D pin of the sixth N-channel long effect transistor P6 is connected to the base of the second PNP transistor Q2 through the second resistor R2, the collector of the second PNP transistor Q2 is connected to the ground terminal GND through the fourth resistor R4, and the second PNP The emitter of the transistor Q2 is connected to the emitter of the first NPN transistor Q1, the base of the first NPN transistor Q1 is connected to the base of the second PNP transistor Q2, the collector of the first NPN transistor Q1 is connected to the +24V power supply voltage VCC, the +24V power supply voltage VCC is connected to the G pin of the first P-channel long effect transistor P1 through the fifteenth resistor R15, the G pin of the first P-channel long effect transistor P1 is also connected to the emitter of the second PNP transistor Q2 through the sixteenth resistor R16, the S pin of the first P-channel long effect transistor P1 is connected to the +24V power supply voltage VCC, the D pin of the first P-channel long effect transistor P1 is connected to the D pin of the second N-channel long effect transistor P2 and serves as a pad interface A, the S pin of the second N-channel long effect transistor P2 is connected to the ground terminal GND, the G pin of the second N-channel long effect transistor P2 is connected to one end of the fifth resistor R5, and the other end of the fifth resistor R5 is connected to another PWM control port of the central processor 1 as a PWM interface 1;

[0024] The S pin of the fifth N-channel long effect transistor P5 is connected to the ground terminal GND, one end of the G pin of the fifth N-channel long effect transistor P5 is connected to the fourteenth resistor R14, the other end of the fourteenth resistor R14 is used as a PWM interface to connect a PWM control port of the central processor 1, the D pin of the fifth N-channel long effect transistor P5 is connected to the base of the fourth PNP transistor Q4 through the twelfth resistor R12, the collector of the fourth PNP transistor Q4 is connected to the ground terminal GND through the seventeenth resistor R17, the emitter of the fourth PNP transistor Q4 is connected to the emitter of the third NPN transistor Q3, the base of the third NPN transistor Q3 is connected to the base of the fourth PNP transistor Q4, and the collector of the third NPN transistor Q3 is connected to the base of the fourth PNP transistor Q4. Connect to +24V power supply voltage VCC, the +24V power supply voltage VCC is connected to the G pin of the third P-channel long effect transistor P3 through the tenth resistor R10, the G pin of the third P-channel long effect transistor P3 is also connected to the emitter of the fourth PNP transistor Q4 through the eleventh resistor R11, the S pin of the third P-channel long effect transistor P3 is connected to the +24V power supply voltage VCC, the D pin of the third P-channel long effect transistor P3 is connected to the D pin of the fourth N-channel long effect transistor P4 and serves as a pad interface B, the S pin of the fourth N-channel long effect transistor P4 is connected to the ground terminal GND, the G pin of the fourth N-channel long effect transistor P4 is connected to one end of the eighth resistor R8, and the other end of the eighth resistor R8 is used as PWM interface 2 to connect to another PWM control port of the central processor 1.

[0025] Preferably, a first resistor R1 is connected between the base of the second PNP transistor Q2 and the collector of the first NPN transistor Q1, a sixth resistor R6 is connected between the G pin and the S pin of the second N-channel long-effect transistor P2, a twelfth resistor R12 is connected between the base of the fourth PNP transistor Q4 and the collector of the third NPN transistor Q3, and a ninth resistor R9 is connected between the G pin and the S pin of the fourth N-channel long-effect transistor P4.

[0026] In this structure, the conduction of the H-bridge control LED brightness and color temperature circuit 4 is controlled by two PWM ports of the central processor 1. The H-bridge control LED brightness and color temperature circuit 4 has high requirements for timing, so the board structure adopts PWM complementary method for control. At any time point, the current flows in only one direction or two directions, and will never flow at the same time. If they flow at the same time, the MOS tube will be burned out. In order to make P1 and P2 have better conduction performance, we added fast switching MOS tube 2N7002. In order to enhance the conduction performance of P1 and P2, we added a push-pull circuit composed of NPN and PNP combination, so that MOS P1 and P2 will not have PWM time overlap caused by PWM waveform deformation due to junction capacitance problems, which will cause MOS to burn out. In addition, we strengthened some time control on the timing when designing the software, so that the entire circuit works in the best and safest working state!

[0027] The advantage of this structure is that it can be controlled by two wires. In the later stage, various styles of low-voltage bulbs can be set. The two wires connected to the control board (i.e., solder pad interface B and solder pad interface A) are connected to the screw mouth of the low-voltage bulb to realize the control of the color temperature and brightness of the bulb. The whole circuit uses a 12-36V isolated adapter DC power supply, so that our control board and bulbs are both safe voltages. There is no risk of high-voltage electric shock during use by the user. The installation method is the same as that of ordinary high-voltage bulbs.

[0028] This structure mainly involves low-voltage two-wire control, 2.4G wireless, touch control related technical fields, which as a whole include a low-voltage adapter power supply, a slider board, an H-bridge control board, that is, a control circuit of a floor lamp of the present application. When in use, there is a low-voltage plug at the bottom of the entire lamp, which is directly inserted into the DC female head of the lamp to power the entire system. Floor lamps on the market generally install 100-240V AC input LED bulbs directly on the lamp head. The lamp head itself has high voltage. When people install the bulb or use the bulb, the human body may touch the high-voltage part in the lamp holder, which is harmful to the lamp holder. The structure uses a two-wire control panel to design a variety of low-voltage bulbs. The two wires connected to the control panel are connected to the screw thread of the low-voltage bulb to control the color temperature and brightness of the bulb. In addition, a 12-36V isolated DC adapter is used for the front end of the control circuit of a floor lamp in the present application, so that our control panel and bulbs are both at safe voltages. There is no risk of high-voltage electric shock during use by the user. The installation method is the same as that of an ordinary high-voltage bulb. At the same time, the circuit adopts an integrated design to ensure that the circuit is simpler and the installation is more convenient.

[0029] At the same time, in order to reduce the area of ​​PCB in this application, the two transistors Q1 and Q2 in the figure are replaced by a SOT23-6 packaged MMBT3946. MMBT3946 is a chip integrating N transistors and P transistors. Similarly, Q3 and Q4 are also operated in this way. P1 and P2 are replaced by a SOP8 packaged AGM425M. AGM425 is a chip integrating N-MOS tubes and P-MOS tubes. Similarly, P3 and P4 are also operated in this way. In the entire control board, such an integrated design is adopted, which makes the circuit extremely simple and miniaturized. The final circuit is as follows Figure 6 shown.

[0030] Example 2

[0031] See also Figure 3As shown, the general structure of the control circuit of a floor lamp disclosed in this embodiment is the same as that of Embodiment 1, except that, as a preference, a touch button control interface 6 is also electrically connected to the central processor 1, and touch control can be achieved by setting the touch button control interface 6 and subsequently connecting a touch switch.

[0032] Example 3

[0033] See also Figure 4 As shown, the general structure of the control circuit of a floor lamp disclosed in this embodiment is the same as that of Embodiment 2, except that, preferably, a 2.4G RF remote control signal terminal 7 is also electrically connected to the central processor 1, and remote control can be achieved later by setting the 2.4G RF remote control signal terminal 7.

[0034] Example 4

[0035] See also Figure 5 As shown, the general structure of the control circuit of a floor lamp disclosed in this embodiment is the same as that of Embodiment 3, except that, as a preference, a mobile phone Bluetooth signal terminal 8 is also electrically connected to the central processor 1. By setting the mobile phone Bluetooth signal terminal 8, remote control by a mobile phone can be achieved later.

[0036] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. According to the claim, a control circuit of a floor lamp is characterized in that: The invention comprises a central processing unit (1), a 12-36V isolation type adapter (2), a DC-DC step-down circuit (3) and an H-bridge control circuit for controlling LED brightness and color temperature (4); the input end of the 12-36V isolation type adapter (2) is connected to the mains, the output end of the 12-36V isolation type adapter (2) is connected to the input end of the DC-DC step-down circuit (3), the output end of the DC-DC step-down circuit (3) is connected to the central processing unit (1), two PWM control ports of the central processing unit (1) are connected to two PWM ports of the H-bridge control circuit for controlling LED brightness and color temperature (4), the H-bridge control circuit for controlling LED brightness and color temperature (4) is turned on through the two PWM control ports, and the output of the LED brightness and color temperature circuit (4) is connected in parallel with one or more LED lamp groups (5).

2. The control circuit of a floor lamp according to claim 1, characterized in that: The H-bridge LED brightness and color temperature control circuit (4) comprises a +24V power supply voltage VCC, a first NPN transistor Q1, a second PNP transistor Q2, a third NPN transistor Q3, a fourth PNP transistor Q4, a first P-channel long effect transistor P1, a second N-channel long effect transistor P2, a third P-channel long effect transistor P3, a fourth N-channel long effect transistor P4, a fifth N-channel long effect transistor P5, and a sixth N-channel long effect transistor P6, wherein the S pin of the sixth N-channel long effect transistor P6 is connected to the ground terminal GND, one end of the G pin of the sixth N-channel long effect transistor P6 is connected to the third resistor R3, and the other end of the third resistor R3 is connected to a PWM control port of the central processing unit (1) as a PWM interface 2, the D pin of the sixth N-channel long effect transistor P6 is connected to the base of the second PNP transistor Q2 through the second resistor R2, the collector of the second PNP transistor Q2 is connected to the ground terminal GND through the fourth resistor R4, and the second PNP transistor P6 is connected to the base of the second PNP transistor Q2 through the fourth resistor R5. The emitter of transistor Q2 is connected to the emitter of the first NPN transistor Q1, the base of the first NPN transistor Q1 is connected to the base of the second PNP transistor Q2, the collector of the first NPN transistor Q1 is connected to the +24V power supply voltage VCC, the +24V power supply voltage VCC is connected to the G pin of the first P-channel long effect transistor P1 through a fifteenth resistor R15, the G pin of the first P-channel long effect transistor P1 is also connected to the emitter of the second PNP transistor Q2 through a sixteenth resistor R16, the S pin of the first P-channel long effect transistor P1 is connected to the +24V power supply voltage VCC, the D pin of the first P-channel long effect transistor P1 is connected to the D pin of the second N-channel long effect transistor P2 and serves as a pad interface A, the S pin of the second N-channel long effect transistor P2 is connected to the ground terminal GND, the G pin of the second N-channel long effect transistor P2 is connected to one end of a fifth resistor R5, and the other end of the fifth resistor R5 is connected to another PWM control port of the central processing unit (1) as a PWM interface 1; The S pin of the fifth N-channel long effect transistor P5 is connected to the ground terminal GND, one end of the G pin of the fifth N-channel long effect transistor P5 is connected to the fourteenth resistor R14, the other end of the fourteenth resistor R14 is used as a PWM interface to connect a PWM control port of the central processing unit (1), the D pin of the fifth N-channel long effect transistor P5 is connected to the base of the fourth PNP transistor Q4 through the twelfth resistor R12, the collector of the fourth PNP transistor Q4 is connected to the ground terminal GND through the seventeenth resistor R17, the emitter of the fourth PNP transistor Q4 is connected to the emitter of the third NPN transistor Q3, the base of the third NPN transistor Q3 is connected to the base of the fourth PNP transistor Q4, and the collector of the third NPN transistor Q3 is connected to the base of the fourth PNP transistor Q4. The +24V power supply voltage VCC is connected, and the +24V power supply voltage VCC is connected to the G pin of the third P-channel long effect transistor P3 through the tenth resistor R10. The G pin of the third P-channel long effect transistor P3 is also connected to the emitter of the fourth PNP triode Q4 through the eleventh resistor R11. The S pin of the third P-channel long effect transistor P3 is connected to the +24V power supply voltage VCC. The D pin of the third P-channel long effect transistor P3 is connected to the D pin of the fourth N-channel long effect transistor P4 and serves as a pad interface B. The S pin of the fourth N-channel long effect transistor P4 is connected to the ground terminal GND. The G pin of the fourth N-channel long effect transistor P4 is connected to one end of the eighth resistor R8. The other end of the eighth resistor R8 serves as a PWM interface 2 to connect to another PWM control port of the central processing unit (1).

3. The control circuit of a floor lamp according to claim 2, characterized in that: A first resistor R1 is connected between the base of the second PNP transistor Q2 and the collector of the first NPN transistor Q1, a sixth resistor R6 is connected between the G pin and the S pin of the second N-channel long-effect transistor P2, a twelfth resistor R12 is connected between the base of the fourth PNP transistor Q4 and the collector of the third NPN transistor Q3, and a ninth resistor R9 is connected between the G pin and the S pin of the fourth N-channel long-effect transistor P4.

4. The control circuit of a floor lamp according to claim 1, characterized in that: The central processing unit (1) is also electrically connected to a touch key control interface (6).

5. The control circuit of a floor lamp according to claim 4, characterized in that: The central processor (1) is also electrically connected to a 2.4G RF remote control signal terminal (7).

6. The control circuit of a floor lamp according to claim 5, characterized in that: The central processor (1) is also electrically connected to a mobile phone Bluetooth signal terminal (8).

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