Touch control lamp control circuit

Abstract

The utility model belongs to the technical field of lighting equipment, and particularly relates to a touch control lamp control circuit which comprises a main control circuit, a driving circuit, a power supply circuit and a touch control circuit. The main control circuit comprises a main control chip, the driving circuit is connected with the main control chip, the power supply circuit is connected with the main control chip and the driving circuit, and the touch control circuit is connected with the main control chip and controls the output of the driving circuit through the main control chip. According to the utility model, the master control circuit, the driving circuit, the power supply circuit and the touch control circuit are arranged, stable voltage output is provided for the external lamp through the driving circuit, a current-limiting resistor does not need to be arranged, power loss is reduced, heat accumulation is avoided, the stability of the circuit is improved, and the service life of the lamp is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lighting equipment technical field especially, it relates to a touch lamp control circuit. BACKGROUND

[0002] In the prior art, the driving circuit of LED usually needs to connect current-limiting resistance in the circuit of LED, to limit the current flowing through the LED, so as to protect the LED from the impact of excessive current and ensure its operation within the rated operating range. The current-limiting resistance consumes part of the electric energy and converts the excess voltage into heat to limit the current. This method has the characteristics of simple implementation and low cost, and is therefore widely used in traditional LED driving circuits, especially in direct current power supply or constant voltage driving circuits.

[0003] The current-limiting resistance converts part of the electric energy into heat for consumption. This way not only reduces the overall efficiency of the circuit, but also increases the power loss of the system. Especially in high-power LED applications, the energy waste caused by the current-limiting resistance is more obvious, and the heat accumulated by the current-limiting resistance will affect the stability of the circuit and shorten the service life of the LED.

[0004] Therefore, it is necessary to improve the prior art to solve the above problems. SUMMARY

[0005] The utility model aims at providing a touch lamp control circuit, which aims to solve the technical problems of large power loss and heat accumulation affecting the stability of the circuit in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model embodiment provides a touch lamp control circuit, which comprises a main control circuit, a driving circuit, a power supply circuit and a touch circuit. The main control circuit comprises a main control chip, the driving circuit is connected to the main control chip, the power supply circuit is connected to the main control chip and the driving circuit, and the touch circuit is connected to the main control chip and controls the output of the driving circuit through the main control chip.

[0007] As a preferred scheme, the driving circuit comprises a first MOS tube, a second MOS tube and an output interface. The gate of the first MOS tube is connected to the ninth pin of the main control chip. The gate of the second MOS tube is connected to the tenth pin of the main control chip. The first pin of the output interface is connected to the drain of the first MOS tube, the second pin of the output interface is connected to the power supply circuit, and the third pin of the output interface is connected to the drain of the second MOS tube.

[0008] As a preferred solution, the driving circuit further comprises a first filter unit and a second filter unit, the first filter unit is connected between the first MOS tube and the output interface, and the second filter unit is connected between the second MOS tube and the output interface.

[0009] As a preferred solution, the first filter unit comprises a first inductor, a first diode and a first capacitor, a first end of the first inductor is connected to the drain of the first MOS tube, a second end of the first inductor is connected to a first pin of the output interface, a positive electrode of the first diode is connected to the drain of the first MOS tube, a negative electrode of the first diode is connected to a second pin of the output interface, a first end of the first capacitor is connected to the negative electrode of the first diode, and a second end of the first capacitor is connected to the second end of the first inductor.

[0010] As a preferred solution, the second filter unit comprises a second inductor, a second diode and a second capacitor, a first end of the second inductor is connected to the drain of the second MOS tube, a second end of the second inductor is connected to a third pin of the output interface, a positive electrode of the second diode is connected to the drain of the second MOS tube, a negative electrode of the second diode is connected to the second pin of the output interface, a first end of the second capacitor is connected to the negative electrode of the second diode, and a second end of the second capacitor is connected to the second end of the second inductor.

[0011] As a preferred solution, the touch circuit comprises a plurality of mode touch switches and a plurality of gear touch switches, and the mode touch switches and the gear touch switches are respectively connected to corresponding pins of the master control chip.

[0012] As a preferred solution, the power supply circuit comprises an input interface, a rectifier unit, a voltage stabilizing unit and a filter unit, the input interface is used for connecting an external power supply, the rectifier unit is connected to the input interface, the voltage stabilizing unit is connected to the rectifier unit, and the filter unit is connected to the voltage stabilizing unit.

[0013] As a preferred solution, the voltage stabilizing unit comprises a transistor, a voltage stabilizing tube and a third capacitor, a collector of the transistor is connected to the rectifier unit, an emitter of the transistor is connected to the filter unit, a negative electrode of the voltage stabilizing tube is connected to a base of the transistor, and the third capacitor is connected in parallel across the voltage stabilizing tube.

[0014] As a preferred solution, the master control circuit further comprises a status indicator, a positive electrode of the status indicator is connected to the power supply circuit, and a negative electrode of the status indicator is connected to an eleventh pin of the master control chip.

[0015] The one or more technical solutions in the touch lamp control circuit provided by the embodiment of the utility model have at least one of the following technical effects:

[0016] The utility model discloses a main control circuit, drive circuit, power supply circuit and touch circuit are set up, and the drive circuit provides stable voltage output for external lamps and lanterns, need not set up current -limiting resistance, reduces power loss, avoids heat accumulation, and then improves the stability of circuit and the service life of lamps and lanterns. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will be briefly introduced to the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0018] Figure 1 The circuit schematic diagram of the main control circuit and the touch circuit provided in the embodiment of the utility model is provided.

[0019] Figure 2 The circuit schematic diagram of the drive circuit provided in the embodiment of the utility model is provided.

[0020] Figure 3 The circuit schematic diagram of the power supply circuit provided in the embodiment of the utility model is provided.

[0021] Among them, the various signs in the drawing:

[0022] 100-main control circuit;200-drive circuit;300-power supply circuit;400-touch circuit. DETAILED DESCRIPTION

[0023] The embodiment of the utility model is described in detail below, and the examples of the embodiment are shown in the drawings, wherein the same or similar signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the embodiments of the utility model, and cannot be understood as limiting the utility model.

[0024] In the description of the embodiments of the utility model, it is understood that the directions or position relations indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the directions or position relations shown in the drawings, and are only for the convenience of describing the embodiments of the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a specific direction, be constructed in a specific direction and be operated, and therefore cannot be understood as limiting the utility model.

[0025] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0026] In the embodiments of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the communication inside two elements or the interaction relationship between two elements. For ordinary skilled persons in the art, the specific meanings of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0027] In one embodiment of the utility model, as shown in Figures 1-3 A touch lamp control circuit is provided, which comprises a main control circuit 100, a driving circuit 200, a power supply circuit 300 and a touch circuit 400. The main control circuit 100 comprises a main control chip U1, the driving circuit 200 is connected to the main control chip U1, the power supply circuit 300 is connected to the main control chip U1 and the driving circuit 200, and the touch circuit 400 is connected to the main control chip U1 and controls the output of the driving circuit 200 through the main control chip U1.

[0028] The embodiment provides stable voltage output for external lamps through the driving circuit 200, does not need to set a current limiting resistor, reduces power loss, avoids heat accumulation, and thus improves the stability of the circuit and the service life of the lamp.

[0029] As shown in Figure 1 The main control circuit 100 further comprises a state indicating lamp DS1, the positive electrode of the state indicating lamp DS1 is connected to the power supply circuit 300, and the negative electrode of the state indicating lamp DS1 is connected to the eleventh pin of the main control chip U1.

[0030] As shown in Figure 2 The driving circuit 200 includes a first MOS tube Q2, a second MOS tube Q3 and an output interface CN2. The gate of the first MOS tube Q2 is connected to the ninth pin of the master chip U1. The gate of the second MOS tube Q3 is connected to the tenth pin of the master chip U1. The first pin of the output interface CN2 is connected to the drain of the first MOS tube Q2. The second pin of the output interface CN2 is connected to the power supply circuit 300. The third pin of the output interface CN2 is connected to the drain of the second MOS tube Q3. In this embodiment, the first MOS tube Q2 and the second MOS tube Q3 are controlled by two independent pulse width modulation signals PWM0 and PWM1, respectively, so as to realize the brightness adjustment and on-off of the two groups of LEDs.

[0031] In this embodiment, the driving circuit 200 further includes a first filter unit and a second filter unit. The first filter unit is connected between the first MOS tube Q2 and the output interface CN2. The second filter unit is connected between the second MOS tube Q3 and the output interface CN2.

[0032] Specifically, the first filter unit includes a first inductor L1, a first diode D2 and a first capacitor C6. The first end of the first inductor L1 is connected to the drain of the first MOS tube Q2. The second end of the first inductor L1 is connected to the first pin of the output interface CN2. The anode of the first diode D2 is connected to the drain of the first MOS tube Q2. The cathode of the first diode D2 is connected to the second pin of the output interface CN2. The first end of the first capacitor C6 is connected to the cathode of the first diode D2. The second end of the first capacitor C6 is connected to the second end of the first inductor L1.

[0033] The second filter unit includes a second inductor L2, a second diode D3 and a second capacitor C7. The first end of the second inductor L2 is connected to the drain of the second MOS tube Q3. The second end of the second inductor L2 is connected to the third pin of the output interface CN2. The anode of the second diode D3 is connected to the drain of the second MOS tube Q3. The cathode of the second diode D3 is connected to the second pin of the output interface CN2. The first end of the second capacitor C7 is connected to the cathode of the second diode D3. The second end of the second capacitor C7 is connected to the second end of the second inductor L2.

[0034] As shown in Figure 3As shown, the power supply circuit 300 includes an input interface CN1, a rectifier unit, a voltage stabilizing unit and a filter unit. The input interface CN1 is used for connecting an external power supply; the rectifier unit is connected to the input interface, the voltage stabilizing unit is connected to the rectifier unit, and the filter unit is connected to the voltage stabilizing unit. The rectifier unit includes a third diode D1. The voltage stabilizing unit includes a transistor Q1, a voltage stabilizing tube ZD1 and a third capacitor C5; the collector of the transistor Q1 is connected to the rectifier unit, the emitter of the transistor Q1 is connected to the filter unit; the negative electrode of the voltage stabilizing tube ZD1 is connected to the base of the transistor Q1; and the third capacitor C5 is connected in parallel across the voltage stabilizing tube ZD1. The rectifier unit includes a fourth capacitor C2, a fifth capacitor C1 and a sixth capacitor C3.

[0035] The touch circuit 400 includes a plurality of mode touch switches and a plurality of gear touch switches, which are respectively connected to corresponding pins of the master control chip U1. In this embodiment, the mode switches are used to switch between yellow light and white light, and the gear touch switches are used to adjust the brightness of the lamp. Specifically, the mode touch switches include switches S8, S9 and S10, and the gear touch switches include switches TP1, TP2, TP3, TP4, TP5, TP6 and TP7.

[0036] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A touch light fixture control circuit, comprising: The application relates to a touch control circuit, which comprises a main control circuit, a driving circuit, a power supply circuit and a touch control circuit; the main control circuit comprises a main control chip; the driving circuit is connected with the main control chip; the power supply circuit is connected with the main control chip and the driving circuit; the touch control circuit is connected with the main control chip and controls the output of the driving circuit through the main control chip.

2. The touch lamp control circuit of claim 1, wherein, The driving circuit comprises a first MOS tube, a second MOS tube and an output interface; the gate of the first MOS tube is connected with the ninth pin of the main control chip; the gate of the second MOS tube is connected with the tenth pin of the main control chip; the first pin of the output interface is connected with the drain of the first MOS tube; the second pin of the output interface is connected with the power supply circuit; the third pin of the output interface is connected with the drain of the second MOS tube.

3. The touch lamp control circuit of claim 2, wherein, The driving circuit further comprises a first filter unit and a second filter unit; the first filter unit is connected between the first MOS tube and the output interface; the second filter unit is connected between the second MOS tube and the output interface.

4. The touch lamp control circuit of claim 3, wherein, The first filter unit comprises a first inductor, a first diode and a first capacitor; the first end of the first inductor is connected with the drain of the first MOS tube; the second end of the first inductor is connected with the first pin of the output interface; the anode of the first diode is connected with the drain of the first MOS tube; the cathode of the first diode is connected with the second pin of the output interface; the first end of the first capacitor is connected with the cathode of the first diode; and the second end of the first capacitor is connected with the second end of the first inductor.

5. The touch lamp control circuit of claim 3, wherein, The second filter unit comprises a second inductor, a second diode and a second capacitor; the first end of the second inductor is connected with the drain of the second MOS tube; the second end of the second inductor is connected with the third pin of the output interface; the anode of the second diode is connected with the drain of the second MOS tube; the cathode of the second diode is connected with the second pin of the output interface; the first end of the second capacitor is connected with the cathode of the second diode; and the second end of the second capacitor is connected with the second end of the second inductor.

6. A touch lamp control circuit according to any one of claims 1-5, characterized in that, The touch control circuit comprises a plurality of mode touch switches and a plurality of gear touch switches; the mode touch switches and the gear touch switches are respectively connected with corresponding pins of the main control chip.

7. A touch lamp control circuit according to any one of claims 1-5, characterized in that, The power supply circuit comprises an input interface, a rectifier unit, a voltage stabilizing unit and a filter unit; the input interface is used for connecting an external power supply; the rectifier unit is connected with the input interface; the voltage stabilizing unit is connected with the rectifier unit; and the filter unit is connected with the voltage stabilizing unit.

8. The touch lamp control circuit of claim 7, wherein, The voltage stabilizing unit comprises a triode, a voltage stabilizing tube and a third capacitor; the collector of the triode is connected with the rectifier unit; the emitter of the triode is connected with the filter unit; the negative electrode of the voltage stabilizing tube is connected with the base of the triode; and the third capacitor is connected in parallel across the voltage stabilizing tube.

9. A touch lamp control circuit according to any one of claims 1-5, wherein, The main control circuit further comprises a state indicating lamp; the anode of the state indicating lamp is connected with the power supply circuit; and the cathode of the state indicating lamp is connected with the eleventh pin of the main control chip.

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