CN217546367U

CN217546367U - Lamp driving circuit

Info

Publication number: CN217546367U
Application number: CN202123025298.6U
Authority: CN
Inventors: 蒋小军; 肖名灿
Original assignee: Dongguan Jiepu Electronic Technology Co ltd
Current assignee: Dongguan Jiepu Electronic Technology Co ltd
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-10-04
Anticipated expiration: 2031-12-03

Abstract

The utility model relates to a lamps and lanterns drive circuit includes: a control module and a voltage transformation module. The control module includes: the circuit comprises a control chip U1, a resistor R21 connected with the control chip U1, a triode Q8 connected with the resistor R21, a resistor R22 connected between the resistor R21 and the triode Q8, a resistor R20 connected with the triode Q8, a field effect transistor Q6 connected with the resistor R20, and a resistor R19 connected with the resistor R20. The voltage transformation module comprises: the transformer T1 is connected with the field effect tube Q6, the triode Q1 is connected with the transformer T1, the triode Q2 is connected with the transformer T1, the capacitor C12 is connected between the triode Q1 and the triode Q2, the resistor R1 is connected between the triode Q2 and the field effect tube Q6, the capacitor C1 is connected with the transformer T1, the capacitor C2 is connected with the transformer T1, and the capacitor C3 is connected with the transformer T1. The circuit structure is simple, the driving requirement of the lamp is met, a complex inverter circuit is omitted, the cost of circuit design can be reduced, the practicability is improved, and the high cost performance design requirement of a product is met more easily.

Description

Lamp driving circuit

Technical Field

The utility model relates to a disinfecting equipment technical field especially relates to a lamps and lanterns drive circuit.

Background

The disinfection equipment is widely applied to various fields, and along with the improvement of living standard, the application of the disinfection equipment in home and diet is common. Generally, one or more of an ozone generator, a UV (Ultra-Violet Ray, chinese) lamp, a steam generator, and a heat pipe are installed in the disinfection apparatus to achieve the disinfection purpose.

For a disinfection apparatus provided with a UV lamp, the UV lamp needs to be driven by inputting alternating current. Generally, if the mains supply is adopted, a boost oscillating circuit is not required to be configured. If the battery is used for power supply, the battery is a direct-current low-voltage power supply, so that the UV lamp cannot be driven by the DC-DC boosting. The current common solution is to add a more complex inverter circuit to convert dc power to ac power to drive the UV lamp. The defects are as follows: make the drive circuit of UV lamp become very complicated, the UV lamp in general disinfecting equipment in addition only need lower electric current alright in order to drive, set up complicated inverter circuit and can lead to circuit design's cost to increase substantially, the practicality is lower, is difficult to satisfy the high price/performance ratio design demand of product.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model provides a lamps and lanterns drive circuit builds simple circuit structure, can satisfy the drive requirement of the lamps and lanterns of high-pressure low-current requirement, need not to set up complicated inverter circuit, can reduce circuit design's cost, improves the practicality, satisfies the high price/performance ratio design demand of product more easily.

A luminaire driving circuit comprising:

a control module; the control module includes: the control circuit comprises a control chip U1, a resistor R21 connected with the control chip U1, a triode Q8 connected with the resistor R21, a resistor R22 connected between the resistor R21 and the triode Q8, a resistor R20 connected with the triode Q8, a field effect transistor Q6 connected with the resistor R20, and a resistor R19 connected with the resistor R20; the field effect tube Q6 is connected with a battery; and

the voltage transformation module is connected with the control module; the voltage transformation module comprises: the transformer T1 is connected with the field effect tube Q6, the triode Q1 is connected with the transformer T1, the triode Q2 is connected with the transformer T1, the capacitor C12 is connected between the triode Q1 and the triode Q2, the resistor R1 is connected between the triode Q2 and the field effect tube Q6, the capacitor C1 is connected with the transformer T1, the capacitor C2 is connected with the transformer T1, and the capacitor C3 is connected with the transformer T1; the transformer T1, the capacitor C2 and the capacitor C3 are respectively connected with the lamp.

In the lamp driving circuit, the control module is used for controlling the starting and the closing of the voltage transformation module. Because the voltage that control chip U1 output is less than the voltage of the direct current battery that field effect transistor Q6 inserts, can lead to control chip U1 can't accurate control field effect transistor Q6 switch on and close, so control chip U1 draws the voltage of the grid of field effect transistor Q6 department via triode Q8 earlier low to the realization is switched on and is closed to vary voltage module. The voltage transformation module is used for converting direct current output by the direct current battery into alternating current. When the transformation module is started, direct current is connected to drive the triode Q1 and the triode Q2 to work, and the triode Q1 and the triode Q2 generate high-voltage oscillation under the action of the transformer T1 and the capacitor C12, so that high-voltage alternating current is output to drive the lamp to work. Through the design, build simple circuit structure in order to realize that the direct current flows to exchange, satisfy the drive requirement of the lamps and lanterns of high pressure low current requirement, need not to set up complicated inverter circuit, can reduce circuit design's cost, improve the practicality, satisfy the high price/performance ratio design demand of product more easily.

In one embodiment, the transformer module further comprises: and an inductor L1 connected between the field effect transistor Q6 and the transformer T1. The inductor L1 is used for inhibiting the current change of the transformer module during working, so that the purpose of reducing radiation is achieved, and the inductor L1 is used for meeting the condition that the radiation index requirement of a product is high.

In one embodiment, the transformer module further comprises: and a resistor RNC connected between the field effect transistor Q6 and the transformer T1. The resistor RNC is used for inhibiting the current change of the transformer module during working to achieve the purpose of reducing radiation, and is used for meeting the condition that the radiation index requirement of a product is higher.

In one embodiment, the lamp driving circuit further includes: the detection module is connected between the control module and the voltage transformation module; the detection module includes: the circuit comprises a resistor R6 connected between the triode Q2 and the ground, a resistor R5 connected with one end, far away from the ground, of the resistor R6, and a capacitor C5 connected between the resistor R5 and the control chip U1. The detection module is used for detecting the voltage of the voltage transformation module and feeding the voltage back to the control chip U1, and when the detected voltage is larger than a preset rated voltage, the control module closes the voltage transformation module to protect the lamp.

In one embodiment, the detection module further comprises: and the resistor R7 is connected in parallel with the two ends of the resistor R6. The resistor R7 is used for sharing the load of the resistor R6, and the service life of the circuit is prolonged.

In one embodiment, the detection module further comprises: and the capacitor C6 is connected in parallel with the two ends of the capacitor C5. The capacitor C6 is used for sharing the load of the capacitor C5, and the service life of the circuit is prolonged.

In one embodiment, the control module further comprises: the field effect transistor Q3 is connected between the triode Q2 and the resistor R6, the resistor R4 is connected between the field effect transistor Q3 and the ground, and the resistor R3 is connected between the field effect transistor Q3 and the control chip U1. When the lamp driving circuit is just started, the voltage of the voltage transformation module is unstable, and the control chip U1 may misjudge due to the unstable voltage fed back by the detection module, so that the detection module is firstly closed through the field effect transistor Q3, and the detection module is opened through the field effect transistor Q3 after the voltage of the voltage transformation module is raised to a preset value (or the starting time reaches the preset value).

In one embodiment, the transformer module further comprises: and R2 connected in parallel with two ends of the resistor R1. The resistor R2 is used for sharing the load of the resistor R1, and the service life of the circuit is prolonged.

In one embodiment, the transformer module further comprises: and a capacitor E1 connected between one end of the field effect transistor Q6 connected with the battery and the ground. The capacitor E1 is used to protect the electronic components in the transformer module.

In one embodiment, the transformer module further comprises: and the capacitor C4 is connected in parallel with the two ends of the capacitor E1. The capacitor C4 is used for sharing the load of the capacitor E1, and the service life of the circuit is prolonged.

Drawings

Fig. 1 is a schematic diagram of a lamp driving circuit according to a first embodiment of the present invention;

fig. 2 is a schematic diagram of a lamp driving circuit according to a second embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Example one

As shown in fig. 1, it is a lamp driving circuit according to a first embodiment of the present invention.

As shown in fig. 1, the lamp driving circuit includes: the device comprises a control module and a voltage transformation module connected with the control module. The transformation module is used for connecting a direct-current battery to obtain a direct-current power supply and converting the direct-current power supply into high-voltage alternating current to supply to the lamp. The control module is used for controlling the starting and the closing of the voltage transformation module. In this embodiment, the lamp is a UV lamp. It will be appreciated that the lamp may be other types of appliances that require high voltage low current ac power for operation.

Hereinafter, the lamp driving circuit will be further described.

As shown in fig. 1, the control module includes: the circuit comprises a control chip U1, a resistor R21 connected with the control chip U1, a triode Q8 connected with the resistor R21, a resistor R22 connected between the resistor R21 and the triode Q8, a resistor R20 connected with the triode Q8, a field effect transistor Q6 connected with the resistor R20, and a resistor R19 connected with the resistor R20. The field effect transistor Q6 is connected with a battery.

Further, as shown in fig. 1, in the present embodiment, the base of the transistor Q8 is connected to the resistor R21, and the emitter of the transistor Q8 is grounded. One end of the resistor R22 is connected with the base electrode of the triode Q8, and the other end of the resistor R22 is connected with the emitting electrode of the triode Q8; one end of the resistor R20 is connected to the collector of the transistor Q8. The G pole of the field effect transistor Q6 is connected with one end of the resistor R20 far away from the triode Q8. One end of the resistor R21 is connected with the G pole of the field effect transistor Q6, and the other end of the resistor R21 is connected with the S pole of the field effect transistor Q6. The S pole of the field effect transistor Q6 is used for connecting a battery.

In addition, in order to facilitate connection of the battery, as shown in fig. 1, the control module further includes: and a connector CON5 connected to the S pole of the field effect transistor Q6.

As shown in fig. 1, the voltage transformation module includes: the power supply comprises a transformer T1 connected with a field effect tube Q6, a triode Q1 connected with the transformer T1, a triode Q2 connected with the transformer T1, a capacitor C12 connected between the triode Q1 and the triode Q2, a resistor R1 connected between the triode Q2 and the field effect tube Q6, a capacitor C1 connected with the transformer T1, a capacitor C2 connected with the transformer T1 and a capacitor C3 connected with the transformer T1. The transformer T1, the capacitor C2 and the capacitor C3 are respectively connected with the lamp.

As shown in fig. 1, in the present embodiment, the transformer T1 is provided with three primary coils, a first primary coil is provided with a terminal 9 and a terminal 6, a second primary coil is provided with a terminal 8 and shares the terminal 6 with the first primary coil, and a third primary coil is provided with a terminal 7 and a terminal 10. The transformer T1 is provided with three secondary coils, the first being provided with a joint 3 and a joint 4, the second being provided with a joint 5 and sharing a joint 4 with the first, the third being provided with a joint 1 and a joint 3. And the joint 6 is connected with the D pole of the field effect transistor Q6. The joint 4 and the joint 1 are respectively used for connecting a lamp. The collector of the triode Q1 is connected with the connector 9, the base of the triode Q1 is connected with the connector 10, and the emitter of the triode Q1 is grounded. The collector of the triode Q2 is connected with the connector 8, the base of the triode Q2 is connected with the connector 7, and the emitter of the triode Q2 is grounded. The capacitor C12 is connected between the collector of the transistor Q1 and the collector of the transistor Q2. One end of the resistor R1 is connected with the D pole of the field effect transistor Q6, and the other end of the resistor R1 is connected with the collector of the triode Q2. One end of the capacitor C1 is connected with the joint 3, and the other end of the capacitor C1 is used for connecting a lamp. One end of the capacitor C2 is connected with the connector 5, and the other end of the capacitor C2 is connected with the connector 1 and is used for connecting the lamp. One end of the capacitor C3 is connected with the joint 2, and the other end of the capacitor C3 is used for connecting a lamp.

As shown in fig. 1, in this embodiment, the voltage transformation module may further include: and R2 connected in parallel with two ends of the resistor R1. The resistor R2 is used for sharing the load of the resistor R1, and the service life of the circuit is prolonged.

In addition, in order to facilitate connection of the battery, as shown in fig. 1, the control module further includes: connector CON2 for connecting terminal 4, terminal 1, capacitor C2 and capacitor C3, respectively.

The working principle is briefly described as follows: the control module is used for controlling the starting and the closing of the voltage transformation module. Because the voltage that control chip U1 output is less than the voltage of the direct current battery that field effect transistor Q6 inserts, can lead to the unable accurate control field effect transistor Q6 of control chip U1 to switch on and close, so control chip U1 draws the voltage of the grid of field effect transistor Q6 department via triode Q8 earlier low to the realization is to the switch on and the closing of vary voltage module (make field effect transistor Q6 switch on when control chip U1 output high level gives triode Q8). The voltage transformation module is used for converting direct current output by the direct current battery into alternating current. When the transformation module is started, direct current is connected to drive the triode Q1 and the triode Q2 to work, and the triode Q1 and the triode Q2 generate high-voltage oscillation under the action of the transformer T1 and the capacitor C12, so that high-voltage alternating current is output to drive the lamp to work.

Above-mentioned lamps and lanterns drive circuit builds simple circuit structure and exchanges in order to realize the direct current, satisfies the drive requirement of the lamps and lanterns of high-pressure low-current requirement, need not to set up complicated inverter circuit, can reduce circuit design's cost, improves the practicality, satisfies the high price/performance ratio design demand of product more easily.

Example two

As shown in fig. 2, it is a lamp driving circuit according to a second embodiment of the present invention.

The difference between this embodiment and the first embodiment is: as shown in fig. 2, in this embodiment, the lamp driving circuit further includes: and the detection module is connected between the control module and the voltage transformation module. The detection module includes: the circuit comprises a resistor R6 connected between the triode Q2 and the ground, a resistor R5 connected with one end, far away from the ground, of the resistor R6, and a capacitor C5 connected between the resistor R5 and the control chip U1. The detection module is used for detecting the voltage of the voltage transformation module and feeding the voltage back to the control chip U1, and when the detected voltage is larger than a preset rated voltage, the control module closes the voltage transformation module to protect the lamp.

As shown in fig. 2, in the present embodiment, one end of the resistor R6 is connected to the emitter of the transistor Q2, and the other end of the resistor R6 is grounded. One end of the resistor R5 is connected with one end, far away from the grounding, of the resistor R6, and the other end of the resistor R5 is connected with the control chip U1. One end of the capacitor C5 is connected between the resistor R5 and the control chip U1, and the other end of the capacitor C5 is grounded.

As shown in fig. 2, in this embodiment, the detecting module may further include: and the resistor R7 is connected in parallel with two ends of the resistor R6. The resistor R7 is used for sharing the load of the resistor R6, and the service life of the circuit is prolonged.

Similarly, as shown in fig. 2, in this embodiment, the detecting module may further include: and the capacitor C6 is connected in parallel with the two ends of the capacitor C5. The capacitor C6 is used for sharing the load of the capacitor C5, and the service life of the circuit is prolonged.

Further, as shown in fig. 2, in this embodiment, the control module may further include: the device comprises a field effect transistor Q3 connected between the triode Q2 and the resistor R6, a resistor R4 connected between the field effect transistor Q3 and the ground, and a resistor R3 connected between the field effect transistor Q3 and the control chip U1. When the lamp driving circuit is just started, the voltage of the voltage transformation module is unstable, and the control chip U1 may misjudge due to the unstable voltage fed back by the detection module, so that the detection module is firstly closed by the field-effect tube Q3, and the detection module is then opened by the field-effect tube Q3 after the voltage of the voltage transformation module is raised to a preset value (or the starting time reaches the preset value).

As shown in fig. 2, in the present embodiment, the D pole of the fet Q3 is connected to the emitter of the transistor Q2, and the S pole of the fet Q3 is connected to the end of the resistor R6 away from the ground. One end of the resistor R3 is connected with the control chip U1, and the other end of the resistor R3 is connected with the G pole of the field effect transistor Q3. One end of the resistor R4 is connected with the G pole of the field effect transistor Q3, and the other end of the resistor R4 is grounded.

In some areas, there is a demand for the amount of radiation generated by electronic products, and targeted improvements can be made to this.

For example, as shown in fig. 2, in the present embodiment, the voltage transformation module further includes: and the inductor L1 is connected between the field effect transistor Q6 and the transformer T1. The inductor L1 is used for inhibiting current change of the transformer module during working, so that the purpose of reducing radiation is achieved, and the inductor L1 is used for meeting the condition that the radiation index requirement of a product is high.

The cost of the inductor is high, and in order to reduce the radiation quantity and the product cost, the method which is the second way can be adopted. For example, in other embodiments, the inductance L1 may be replaced with a resistance RNC. The resistor RNC is used for inhibiting the current change of the transformer module during working to achieve the purpose of reducing radiation, and is used for meeting the condition that the radiation index requirement of a product is higher.

In this embodiment, as shown in fig. 2, in this embodiment, the voltage transformation module may further include: and a capacitor E1 connected between one end of the field effect transistor Q6 connected with the battery and the ground. The capacitor E1 is used to protect the electronic components in the transformer module. As shown in fig. 2, in the present embodiment, the positive electrode of the capacitor E1 is connected to the S electrode of the field effect transistor Q6, and the negative electrode of the capacitor E1 is grounded.

Further, as shown in fig. 2, in this embodiment, the voltage transformation module may further include: and the capacitor C4 is connected in parallel with the two ends of the capacitor E1. The capacitor C4 is used for sharing the load of the capacitor E1, and the service life of the circuit is prolonged.

Other structures of the present embodiment are the same as those of the first embodiment, and the beneficial effects of the first embodiment can also be achieved.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent preferred embodiments of the present invention, and the description thereof is more specific and detailed, but should not be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A lamp driving circuit, comprising:

the voltage transformation module is connected with the control module; the voltage transformation module comprises: the device comprises a transformer T1 connected with a field effect tube Q6, a triode Q1 connected with the transformer T1, a triode Q2 connected with the transformer T1, a capacitor C12 connected between the triode Q1 and the triode Q2, a resistor R1 connected between the triode Q2 and the field effect tube Q6, a capacitor C1 connected with the transformer T1, a capacitor C2 connected with the transformer T1 and a capacitor C3 connected with the transformer T1; the transformer T1, the capacitor C2 and the capacitor C3 are respectively connected with the lamp.

2. The lamp driver circuit of claim 1, wherein the transformer module further comprises: and an inductor L1 connected between the field effect transistor Q6 and the transformer T1.

3. The lamp driver circuit of claim 1, wherein the transformer module further comprises: and the resistor RNC is connected between the field effect transistor Q6 and the transformer T1.

4. The lamp driving circuit of claim 1, further comprising: the detection module is connected between the control module and the voltage transformation module; the detection module comprises: the circuit comprises a resistor R6 connected between the triode Q2 and the ground, a resistor R5 connected with one end, far away from the ground, of the resistor R6, and a capacitor C5 connected between the resistor R5 and the control chip U1.

5. The lamp driving circuit of claim 4, wherein the detection module further comprises: and the resistor R7 is connected in parallel with the two ends of the resistor R6.

6. The lamp driver circuit of claim 4, wherein the detection module further comprises: and the capacitor C6 is connected in parallel with the two ends of the capacitor C5.

7. The lamp driver circuit of claim 4, wherein the control module further comprises: the field effect transistor Q3 is connected between the triode Q2 and the resistor R6, the resistor R4 is connected between the field effect transistor Q3 and the ground, and the resistor R3 is connected between the field effect transistor Q3 and the control chip U1.

8. The lamp driving circuit of any one of claims 1 to 7, wherein the voltage transforming module further comprises: and R2 connected in parallel with two ends of the resistor R1.

9. The lamp driving circuit of any one of claims 1 to 7, wherein the transformer module further comprises: and a capacitor E1 connected between one end of the field effect transistor Q6 connected with the battery and the ground.

10. The lamp driving circuit of claim 9, wherein the voltage transformation module further comprises: and the capacitor C4 is connected in parallel with the two ends of the capacitor E1.