LED drive circuit capable of switching lighting effect

Abstract

The utility model discloses an LED drive circuit capable of switching lighting effects. The LED drive circuit comprises a voltage input unit, a rectifier bridge module, a constant current control module, a transformer unit, a power supply unit, a grounding end and a dial-up unit. The voltage input unit is used for receiving external alternating current, the rectifier bridge module is used for converting the alternating current received by the voltage input unit into direct current, and the transformer unit is used for transforming the direct current converted by the rectifier bridge module and then transmitting the direct current to the power supply unit and the signal control module. The constant current control module is used for enabling the current of the direct current transmitted to the transformer unit by the rectifier bridge module to be constant, the power supply unit is used for supplying power to an external LED lamp, and the dial-up unit is used for changing the switching of the LED lamp and the lighting effect of the LED lamp. According to the LED driving circuit, the driving circuit and the switching circuit of the LED lamp are combined together, and the voltage of the driving circuit is used as a signal for controlling the LED lamp to switch the lighting effect, so that the circuit structure of the LED lamp is simplified.

Description

Technical Field

[0001] This utility model relates to the field of LED power supply technology, and in particular to an LED driving circuit with switchable light effect. Background Technology

[0002] LEDs, with their advantages of being environmentally friendly, energy-saving, and having a long lifespan, are considered the lighting source of the 21st century and are now being widely used in various lighting fixtures, replacing traditional light sources. However, existing LED lights require different luminous efficacy to adapt to different working scenarios, necessitating switching circuits to control these efficacy changes. Combined with the LED driver circuit, this results in a relatively large number of interconnected circuit modules for LED lights. Therefore, existing LED lights require an LED driver circuit that can switch luminous efficacy. Utility Model Content

[0003] To address the issue that existing multi-efficiency LEDs require the connection of numerous circuit modules, this invention provides a switchable luminous efficacy LED driver circuit. The specific technical solution of this invention is as follows:

[0004] A switchable luminous efficacy LED driving circuit includes: a voltage input unit, a rectifier bridge module, a constant current control module, a transformer unit, a power supply unit, a grounding terminal, and a DIP switch unit. The output terminal of the voltage input unit is connected to the input terminal of the rectifier bridge module. The output terminal of the rectifier bridge module is connected to the input terminal of the constant current control module and the input terminal of the transformer. The output terminal of the transformer is connected to the power supply unit and the DIP switch unit. The voltage input unit receives external AC power. The rectifier bridge module converts the AC power received by the voltage input unit into DC power. The transformer unit transforms the DC power converted by the rectifier bridge module and supplies it to the power supply unit and the signal control module. The constant current control module keeps the current of the DC power supplied by the rectifier bridge module to the transformer unit constant. The power supply unit supplies power to an external LED lamp. The DIP switch unit changes the luminous efficacy of the LED lamp.

[0005] Furthermore, the constant current control module includes an LED constant current driver chip IC1, resistors R1, R2, RS1, RS2, capacitor C2, and diode D7. Pin 1 of the LED constant current driver chip IC1 is connected to the ground terminal through resistor R1, pin 2 is connected to the ground terminal, pin 4 is connected to the output terminal of the rectifier bridge module, pin 5 is connected to the input terminal of diode D7 and the input terminal of transformer unit T1 respectively, pin 6 is connected to pin 5, and pin 8 is connected to the ground terminal through resistors RS1 and RS2 respectively. After resistor R2 and capacitor C2 are connected in parallel, one end is connected to the output terminal of diode D7, and the other end is connected to the transformer unit T1 and pin 4 of LED constant current driver chip IC1 respectively.

[0006] Furthermore, the LED constant current driver chip U1 is model BP2851.

[0007] Furthermore, the rectifier bridge module includes a rectifier bridge stack DB1 and a polarized capacitor C1. The input terminal of the rectifier bridge stack DB1 is connected to the voltage input unit, and the output terminal is connected to the polarized capacitor C1, pin 4 of the LED constant current driver chip IC1, and the input terminal of the transformer unit T1, respectively. The positive terminal of the polarized capacitor C1 is connected to the output terminal of the rectifier bridge stack DB1, and the negative terminal is connected to the ground terminal.

[0008] Furthermore, the rectifier bridge DB1 is model MB10F.

[0009] Furthermore, the rectifier bridge module includes a rectifier bridge stack DB1, a fuse F1, and a polarized capacitor C1. The input terminal of the rectifier bridge stack DB1 is connected to the voltage input unit through the fuse F1, and the output terminal is connected to the polarized capacitor C1, pin 4 of the LED constant current driver chip IC1, and the input terminal of the transformer unit T1, respectively. The positive terminal of the polarized capacitor C1 is connected to the output terminal of the rectifier bridge stack DB1, and the negative terminal is connected to the ground terminal.

[0010] Furthermore, the power supply unit includes a positive output terminal vout+, a negative output terminal vout-, a diode D1, a resistor R5, and a polarized capacitor C8. The input terminal of the diode D1 is connected to the first output terminal of the transformer unit T1, the output terminal of the diode D1 is connected to the positive output terminal vout+, and the negative output terminal vout- is connected to the second output terminal of the transformer unit T1. The resistor R5 and the polarized capacitor C8 are connected in parallel and then in series between the positive output terminal vout+ and the negative output terminal vout-. The positive output terminal vout+ and the negative output terminal vout- are used to connect to the positive and negative terminals of the external LED light, respectively.

[0011] Furthermore, the DIP switch unit includes a 10-pin DIP switch SW1, a first output port W-, and a second output port Y-. The input terminal of the DIP switch is connected to the output terminal of the diode D1 through a resistor R5. The output terminal of the DIP switch is connected to the first output port W- and the second output port Y-. The first output port W- and the second output port Y- are used to connect to an external LED.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects: The switchable luminous efficacy LED driving circuit described in this application combines the driving circuit and the switching circuit of the LED lamp together. The voltage of the driving circuit is used as the signal to control the switching of the luminous efficacy of the LED lamp, which simplifies the circuit structure of the LED lamp, reduces the production cost of the LED lamp, and makes it possible for multi-luminous efficacy LEDs not to be connected to too many circuit modules. Attached Figure Description

[0013] Figure 1 This is a circuit schematic diagram of an embodiment;

[0014] Figure 2 This is a circuit diagram of an embodiment. Detailed Implementation

[0015] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific implementation of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solution claimed by the present invention.

[0016] like Figure 1 and Figure 2 As shown, an LED driver circuit with switchable luminous efficacy includes: a voltage input unit, a rectifier bridge module, a constant current control module, a transformer unit, a power supply unit, a grounding terminal, and a DIP switch unit. The output terminal of the voltage input unit is connected to the input terminal of the rectifier bridge module. The output terminal of the rectifier bridge module is connected to the input terminal of the constant current control module and the input terminal of the transformer. The output terminal of the transformer is connected to the power supply unit and the DIP switch unit. The voltage input unit receives external AC power. The rectifier bridge module converts the AC power received by the voltage input unit into DC power. The transformer unit transforms the DC power converted by the rectifier bridge module and supplies it to the power supply unit and the signal control module. The constant current control module keeps the current of the DC power supplied by the rectifier bridge module to the transformer unit constant. The power supply unit supplies power to an external LED lamp. The DIP switch unit changes the luminous efficacy of the LED lamp. The luminous efficacy of the LED lamp includes at least cool light, warm light, and neutral light.

[0017] In one embodiment, the constant current control module includes an LED constant current driver chip IC1, resistors R1, R2, RS1, RS2, capacitor C2, and diode D7. Pin 1 of the LED constant current driver chip IC1 is connected to the ground terminal through resistor R1, pin 2 is connected to the ground terminal, pin 4 is connected to the output terminal of the rectifier bridge module, pin 5 is connected to the input terminal of diode D7 and the input terminal of transformer unit T1 respectively, pin 6 is connected to pin 5, and pin 8 is connected to the ground terminal through resistors RS1 and RS2 respectively. After resistor R2 and capacitor C2 are connected in parallel, one end is connected to the output terminal of diode D7, and the other end is connected to the transformer unit T1 and pin 4 of LED constant current driver chip IC1 respectively.

[0018] In one embodiment, the LED constant current driver chip U1 is model BP2851. BP2851 is a high-precision step-down LED constant current driver chip. The chip operates in inductor current critical continuous mode and is suitable for non-isolated step-down LED constant current power supplies with a full input voltage range of 85Vac-265Vac. The BP2851 chip integrates a 500V power switch and employs a patented floating ground drive architecture and current detection method. The chip's operating current is extremely low, requiring no auxiliary winding detection or power supply. It achieves excellent constant current characteristics with very few external components, significantly saving system cost and size. The LED lamp's power supply circuit uses the BP2851 chip to step down and stabilize the LED lamp's operating voltage, simplifying the LED lamp's power supply circuit.

[0019] In one embodiment, the rectifier bridge module includes a rectifier bridge stack DB1 and a polarized capacitor C1. The input terminal of the rectifier bridge stack DB1 is connected to the voltage input unit, and the output terminal is connected to the polarized capacitor C1, pin 4 of the LED constant current driver chip IC1, and the input terminal of the transformer unit T1, respectively. The positive terminal of the polarized capacitor C1 is connected to the output terminal of the rectifier bridge stack DB1, and the negative terminal is connected to the ground terminal.

[0020] In one embodiment, the rectifier bridge module includes a rectifier bridge stack DB1, a fuse F1, and a polarized capacitor C1. The input terminal of the rectifier bridge stack DB1 is connected to the voltage input unit through the fuse F1, and the output terminal is connected to the polarized capacitor C1, pin 4 of the LED constant current driver chip IC1, and the input terminal of the transformer unit T1, respectively. The positive terminal of the polarized capacitor C1 is connected to the output terminal of the rectifier bridge stack DB1, and the negative terminal is connected to the ground terminal.

[0021] In one embodiment, the rectifier bridge DB1 is model MB10F. MB10F is an ultra-thin surface-mount rectifier bridge that converts alternating current into direct current by utilizing the single-phase conductivity of diodes.

[0022] In one embodiment, the power supply unit includes a positive output terminal vout+, a negative output terminal vout-, a diode D1, a resistor R5, and a polarized capacitor C8. The input terminal of the diode D1 is connected to the first output terminal of the transformer unit T1, the output terminal of the diode D1 is connected to the positive output terminal vout+, and the negative output terminal vout- is connected to the second output terminal of the transformer unit T1. The resistor R5 and the polarized capacitor C8 are connected in parallel and then in series between the positive output terminal vout+ and the negative output terminal vout-. The positive output terminal vout+ and the negative output terminal vout- are used to connect to the positive and negative terminals of an external LED light, respectively.

[0023] In one embodiment, the DIP switch unit includes a 10-pin DIP switch SW1, a first output port W-, and a second output port Y-. The input terminal of the DIP switch is connected to the output terminal of diode D1 through resistor R5. The output terminal of the DIP switch is connected to the first output port W- and the second output port Y-. The first output port W- and the second output port Y- are used to connect to an external LED. The DIP switch SW1 is a 3-segment DIP switch. When the DIP switch is turned, if pins 4 and 7 of the DIP switch are connected to the ground terminal and pins 2, 3, 8, and 9 are connected together, the LED emits a cool light; if pins 1 and 10 of the DIP switch are connected to the ground terminal and pins 2, 3, 8, and 9 are connected together, the LED emits a warm light; if pins 1, 4, 5, 6, 7, and 10 of the DIP switch are connected to the ground terminal and pins 2, 3, 8, and 9 are connected together, the LED emits a neutral light.

[0024] The switchable luminous efficacy LED driver circuit described in this application combines the LED lamp driver circuit and the switching circuit together. The voltage of the driver circuit is used as the signal to control the switching of the LED lamp's luminous efficacy, which simplifies the circuit structure of the LED lamp, reduces the production cost of the LED lamp, and makes it possible for multi-efficiency LEDs to not need to connect too many circuit modules.

[0025] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A switchable luminous efficacy LED driving circuit, characterized in that, include: The system includes a voltage input unit, a rectifier bridge module, a constant current control module, a transformer unit, a power supply unit, a grounding terminal, and a DIP switch unit. The output terminal of the voltage input unit is connected to the input terminal of the rectifier bridge module. The output terminal of the rectifier bridge module is connected to the input terminal of the constant current control module and the input terminal of the transformer. The output terminal of the transformer is connected to the power supply unit and the DIP switch unit. The voltage input unit is used to receive external AC power, the rectifier bridge module is used to convert the AC power received by the voltage input unit into DC power, the transformer unit is used to transform the DC power converted by the rectifier bridge module and then supply it to the power supply unit and the signal control module, the constant current control module is used to keep the current of the DC power supplied by the rectifier bridge module to the transformer unit constant, the power supply unit is used to supply power to the external LED lights, and the DIP switch unit is used to change the switching light efficiency of the LED lights.

2. The switchable luminous efficacy LED driving circuit according to claim 1, characterized in that, The constant current control module includes an LED constant current driver chip IC1, resistors R1, R2, RS1, RS2, capacitor C2, and diode D7. Pin 1 of the LED constant current driver chip IC1 is connected to the ground terminal through resistor R1, pin 2 is connected to the ground terminal, pin 4 is connected to the output terminal of the rectifier bridge module, pin 5 is connected to the input terminal of diode D7 and the input terminal of transformer unit T1 respectively, pin 6 is connected to pin 5, and pin 8 is connected to the ground terminal through resistors RS1 and RS2 respectively. After resistor R2 and capacitor C2 are connected in parallel, one end is connected to the output terminal of diode D7, and the other end is connected to the transformer unit T1 and pin 4 of LED constant current driver chip IC1 respectively.

3. The switchable luminous efficacy LED driving circuit according to claim 2, characterized in that, The LED constant current driver chip U1 is model BP2851.

4. The switchable luminous efficacy LED driving circuit according to claim 2, characterized in that, The rectifier bridge module includes a rectifier bridge stack DB1 and a polarized capacitor C1. The input terminal of the rectifier bridge stack DB1 is connected to the voltage input unit, and the output terminal is connected to the polarized capacitor C1, pin 4 of the LED constant current driver chip IC1, and the input terminal of the transformer unit T1, respectively. The positive terminal of the polarized capacitor C1 is connected to the output terminal of the rectifier bridge stack DB1, and the negative terminal is connected to the ground terminal.

5. The switchable luminous efficacy LED driving circuit according to claim 4, characterized in that, The rectifier bridge DB1 is model MB10F.

6. The switchable luminous efficacy LED driving circuit according to claim 2, characterized in that, The rectifier bridge module includes a rectifier bridge DB1, a fuse F1, and a polarized capacitor C1. The input terminal of the rectifier bridge DB1 is connected to the voltage input unit through the fuse F1, and the output terminal is connected to the polarized capacitor C1, pin 4 of the LED constant current driver chip IC1, and the input terminal of the transformer unit T1, respectively. The positive terminal of the polarized capacitor C1 is connected to the output terminal of the rectifier bridge DB1, and the negative terminal is connected to the ground terminal.

7. The switchable luminous efficacy LED driving circuit according to claim 1, characterized in that, The power supply unit includes a positive output terminal vout+, a negative output terminal vout-, a diode D1, a resistor R5, and a polarized capacitor C8. The input terminal of the diode D1 is connected to the first output terminal of the transformer unit T1, and the output terminal of the diode D1 is connected to the positive output terminal vout+. The negative output terminal vout- is connected to the second output terminal of the transformer unit T1. The resistor R5 and the polarized capacitor C8 are connected in parallel and then in series between the positive output terminal vout+ and the negative output terminal vout-. The positive output terminal vout+ and the negative output terminal vout- are used to connect to the positive and negative terminals of the external LED light, respectively.

8. The switchable luminous efficacy LED driving circuit according to claim 7, characterized in that, The DIP switch unit includes a 10-pin DIP switch SW1, a first output port W-, and a second output port Y-. The input terminal of the DIP switch is connected to the output terminal of diode D1 through resistor R5. The output terminal of the DIP switch is connected to the first output port W- and the second output port Y-. The first output port W- and the second output port Y- are used to connect to external LED lights.

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