Multi-lamp driving circuit

Abstract

The utility model relates to the field of LED lamp driving circuits, in particular to a multi-lamp driving circuit, which comprises a CS1628 chip, a plurality of LED lamp groups, a plurality of first switch tubes and a plurality of second switch tubes, the plurality of first switch tubes and the plurality of second switch tubes are in one-to-one correspondence, and each first switch tube and each second switch tube are in one group. A pin of the CS1628 chip is connected with a control end of the first switch tube, an input end of the first switch tube is connected with a power supply, an output end of the first switch tube is grounded, an input end of the second switch tube is connected with the power supply, a control end of the second switch tube is connected with an input end of the first switch tube, and an output end of the second switch tube is grounded. The output ends of the plurality of second switch tubes are connected with the anode of each LED lamp group, and the cathode of each LED lamp group is connected with the pin of the CS1628 chip. According to the invention, a plurality of LED lamps can be driven.

Description

Technical Field

[0001] The present application relates to the field of LED lamp driving circuits, and in particular to a multi-lamp driving circuit. Background Art

[0002] As an efficient and environmentally friendly lighting device, LED lamps are widely used in modern lighting systems. The circuit driving LED lamps usually consists of a power supply, a driver and an LED lamp, among which the driver plays a key role in regulating and stabilizing the working current of the LED lamp.

[0003] However, in the prior art, the solution of using CS1628 chip as driver has a significant problem: CS1628 chip drives LED lamps through SEG port and COM port, but the SEG port does not pull enough current and can usually only drive one LED lamp. This limits the application of LED lamps in parallel connection and control, and reduces the flexibility and scalability of lighting systems. Utility Model Content

[0004] In order to solve the above problems and thus realize the control of multiple lamps in parallel, the present application provides a multi-lamp driving circuit.

[0005] The present application provides a multi-lamp driving circuit, which adopts the following technical solution:

[0006] A multi-lamp driving circuit includes a CS1628 chip, multiple LED lamp groups, multiple first switch tubes and multiple second switch tubes, wherein the multiple first switch tubes correspond to the multiple second switch tubes one by one and each first switch tube forms a group with each second switch tube, the pin of the CS1628 chip is connected to the control end of the first switch tube, the input end of the first switch tube is connected to a power supply, the output end of the first switch tube is grounded, the input end of the second switch tube is connected to the power supply, the control end of the second switch tube is connected to the input end of the first switch tube, the output ends of the multiple second switch tubes are all connected to the anode of each LED lamp group, and the cathode of each LED lamp group is connected to the pin of the CS1628 chip.

[0007] By adopting the above technical solution, the present invention adopts a first switch tube and a second switch tube, and directly uses a power supply to power the LED lamp, thereby increasing the driving capability, which can be expanded to drive multiple LED lamps, realizing the multi-lamp parallel control of the CS1628 chip, so that the CS1628 chip can drive more LED lamps, thereby improving the use efficiency and lighting effect of the LED lamp.

[0008] Preferably, the first switch tube includes an NPN transistor.

[0009] By adopting the above technical solution, the NPN transistor is usually used as a switch, and its control is very simple. By applying a positive voltage to its base, the NPN transistor can be turned on, so that the circuit connected to it is powered on. The NPN transistor has a fast switching speed and can quickly switch the circuit state to achieve fast switching control of the LED.

[0010] Preferably, a first resistor is connected between the control end of the first switch tube and the pin of the CS1628 chip.

[0011] By adopting the above technical solution, the first resistor can limit the current flowing from the CS1628 chip pin to the base of the NPN transistor, thereby protecting the chip from damage caused by overcurrent.

[0012] Preferably, a second resistor is connected between the control end and the output end of the first switch tube.

[0013] By adopting the above technical solution, the transistor needs to maintain a certain bias current when working, otherwise there will be instability such as dead zone. Connecting an appropriate resistor between the base and the emitter can adjust the circuit bias to prevent excessive or too small bias current from adversely affecting the circuit working state; in addition, when the base is grounded or connected to a low-impedance signal source, the transistor is prone to negative resistance effect, causing circuit instability, and connecting an appropriate resistor between the base and the emitter can reduce the gain and stabilize the circuit.

[0014] Preferably, the second switch tube comprises a field effect tube.

[0015] By adopting the above technical solution, since the field effect tube has a lower on-resistance and a higher input impedance, the power consumed in the switching state is lower. This helps to improve the efficiency and energy saving of the circuit, especially in applications that require long-term operation.

[0016] Preferably, a third resistor is connected between the input end of the first switch tube and the power supply.

[0017] By adopting the above technical solution, the third resistor is used to limit the collector current, thereby protecting the transistor from working in a safe area and avoiding overheating and damage.

[0018] Preferably, the control end of the second switch tube is connected to a fourth resistor, and the other end of the fourth resistor is connected between the third resistor and the input end of the first switch tube.

[0019] By adopting the above technical solution, the fourth resistor can limit the flow of current, thereby protecting the second switch tube.

[0020] Preferably, there are three first switch tubes and three second switch tubes, the LED lamp group includes three light-emitting diodes, the anodes of the three light-emitting diodes are respectively connected to the output ends of the three second switch tubes, and the cathodes of the three light-emitting diodes are connected to the pins of the CS1628 chip.

[0021] By adopting the above technical solution, each first switch tube is combined with the corresponding second switch tube to realize independent control of each light emitting diode. This group control can more flexibly adjust the color of different areas to meet specific needs or scenes.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The present invention adopts the first switch tube and the second switch tube, and directly uses the power supply to power the LED lamp, thereby increasing the driving capability, which can be expanded to drive multiple LED lamps, and realizes the multi-lamp parallel control of the CS1628 chip, so that the CS1628 chip can drive more LED lamps, thereby improving the use efficiency and lighting effect of the LED lamp;

[0024] 2. NPN transistors are usually used as switches, and their control is very simple. By applying a positive voltage to its base, the NPN transistor can be turned on, so that the circuit connected to it is powered on. The NPN transistor has a fast switching speed and can quickly switch the circuit state to achieve fast switching control of the LED;

[0025] 3. The first resistor can limit the current flowing from the CS1628 chip pin to the base of the NPN transistor, thereby protecting the chip from damage by overcurrent. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a partial circuit diagram of the multi-lamp driving circuit of the embodiment of the present application, mainly showing the CS1628 chip.

[0027] Figure 2 This is a partial circuit diagram of a multi-lamp driving circuit according to an embodiment of the present application, mainly showing a first switch tube and a second switch tube.

[0028] Figure 3 It is a partial circuit diagram of a multi-lamp driving circuit of an embodiment of the present application, mainly showing an LED lamp group. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] The embodiment of the present application discloses a multi-lamp driving circuit. Figure 1 , Figure 2 A multi-lamp driving circuit includes a CS1628 chip, six LED lamp groups and three switch circuits, each switch circuit includes a first switch tube and a second switch tube, each LED lamp group includes three light-emitting diodes, wherein the CS1628 chip is a single-chip microcomputer chip U2, the VDD pin of the CS1628 chip is connected to a positive five-volt power supply, the power supply can be a switching power supply, and the GND pin of the CS1628 chip is grounded.

[0034] The first switch tube adopts an NPN transistor, specifically a SMD transistor S8050, the second switch tube includes a field effect tube, specifically a P-channel MOS tube 05P40, the three first switch tubes are Q23 / Q24 / Q25, the three second switch tubes are Q20 / Q21 / Q22, the bases of the three first switch tubes Q23 / Q24 / Q25 are respectively connected to the SEG9 / SEG10 / SEG8 pins of the CS1628 chip, and a first resistor and a protection resistor connected in series are connected between the base of each first switch tube and the pin of the CS1628 chip, the three first resistors are R28 / R29 / R30, and the three protection resistors are R21 / R23 / R25, a second resistor is connected between the base and emitter of the first switch tube, the three second resistors are R31 / R32 / R33, the emitter of the first switch tube is grounded, the collector of the first switch tube is connected to the power supply through a third resistor, the three third resistors are R34 / R26 / R27, the gate of each second switch tube is connected between the third resistor and the collector of the first switch tube through a fourth resistor, the three fourth resistors are R48 / R49 / R56, the source of the second switch tube is connected to the power supply, the drain of each second switch tube is connected to a fifth resistor, the three fifth resistors are R97 / R98 / R99.

[0035] Reference Figure 2 , Figure 3 The six LED light groups are L1 / L2 / L3 / L4 / L5 / L6. Each LED light group includes three light-emitting diodes. The anodes of the three light-emitting diodes are connected to the drains of the three second switch tubes respectively, and the cathodes of the three light-emitting diodes are connected to the COM6 pin of the CS1628 chip (refer to Figure 1 )connect.

[0036] The implementation principle of a multi-lamp driving circuit in an embodiment of the present application is as follows: the driving scheme is developed based on CS1628, and the power supply 5V is directly used to power the LED lamp through the SMD transistor S8050 and the field effect transistor 05P40, thereby increasing the driving capability, which can be expanded to drive multiple LED lamps, realizing the multi-lamp parallel control of the CS1628 chip, so that the CS1628 chip can drive more LED lamps, thereby improving the use efficiency and lighting effect of the LED lamp.

[0037] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A multi-lamp driving circuit, characterized in that: It includes a CS1628 chip, multiple LED light groups, multiple first switch tubes and multiple second switch tubes, the multiple first switch tubes correspond to the multiple second switch tubes one by one and each first switch tube forms a group with each second switch tube, the pin of the CS1628 chip is connected to the control end of the first switch tube, the input end of the first switch tube is connected to a power supply, the output end of the first switch tube is grounded, the input end of the second switch tube is connected to the power supply, the control end of the second switch tube is connected to the input end of the first switch tube, the output ends of the multiple second switch tubes are all connected to the anode of each LED light group, and the cathode of each LED light group is connected to the pin of the CS1628 chip.

2. A multi-lamp driving circuit according to claim 1, characterized in that: The first switch tube includes an NPN transistor.

3. The multi-lamp driving circuit according to claim 1, characterized in that: A first resistor is connected between the control end of the first switch tube and the pin of the CS1628 chip.

4. The multi-lamp driving circuit according to claim 1, characterized in that: A second resistor is connected between the control end and the output end of the first switch tube.

5. The multi-lamp driving circuit according to claim 1, characterized in that: The second switch tube includes a field effect tube.

6. The multi-lamp driving circuit according to claim 1, characterized in that: A third resistor is connected between the input end of the first switch tube and the power supply.

7. A multi-lamp driving circuit according to claim 6, characterized in that: The control end of the second switch tube is connected to a fourth resistor, and the other end of the fourth resistor is connected between the third resistor and the input end of the first switch tube.

8. The multi-lamp driving circuit according to claim 1, characterized in that: There are three first switch tubes and three second switch tubes, and the LED lamp group includes three light-emitting diodes. The anodes of the three light-emitting diodes are respectively connected to the output ends of the three second switch tubes, and the cathodes of the three light-emitting diodes are connected to the pins of the CS1628 chip.

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