A wide voltage doB integrated light source and a lamp

Abstract

This invention provides a wide-voltage DOB integrated light source, comprising: a light source board and a driving power supply mounted on the light source board; the driving power supply includes: a rectifier bridge, a switching transistor, and a dual-voltage constant current driving IC; the AC input terminal of the rectifier bridge is connected to AC mains power, and the DC output terminal is connected to the dual-voltage constant current driving IC; the dual-voltage constant current driving IC controls the switching transistor to turn on or off according to the magnitude of the DC voltage output by the rectifier bridge; the light source board is provided with LED1 and LED2 connected in series, and the switching transistor is connected to the DC output positive terminal of the rectifier bridge at the position where LED1 and LED2 are connected; when the switching transistor is off, LED1 and LED2 are connected in series, and when the switching transistor is on, LED1 and LED2 are connected in parallel. This invention also provides a luminaire equipped with the above integrated light source.

Description

Technical Field

[0001] This utility model relates to lighting devices, and more particularly to LED lighting devices. Background Technology

[0002] DOB LED (Driver on Board LED) is an LED packaging technology. Its full name is "Driver on Board," meaning the driver element is directly integrated onto the bottom or adjacent location of the LED driver circuit board. This design achieves a high degree of integration between the driver and the light source, bringing significant advantages such as reduced driver costs, increased overall integration, smaller lamp size, and faster response speed.

[0003] Traditional DOB solutions, due to technical constraints, cannot achieve field suitability for wide voltage inputs. Utility Model Content

[0004] The main technical problem to be solved by this utility model is to provide an integrated DOB light source that can be used with a wide voltage range.

[0005] To solve the above-mentioned technical problems, this utility model provides a wide voltage DOB integrated light source, including: a light source board and a driving power supply disposed on the light source board; the driving power supply includes: a rectifier bridge, a switching transistor and a dual voltage constant current driving IC.

[0006] The AC input terminal of the rectifier bridge is connected to the mains power, and the DC output terminal is connected to the dual-voltage constant current drive IC; the dual-voltage constant current drive IC controls the switching transistor to turn on or off according to the magnitude of the DC voltage output by the rectifier bridge.

[0007] The light source board is provided with LED1 and LED2 connected in series. The switching transistor is connected to the positive DC output of the rectifier bridge and the position where LED1 and LED2 are connected. When the switching transistor is off, LED1 and LED2 are connected in series. When the switching transistor is on, LED1 and LED2 are connected in parallel.

[0008] In a preferred embodiment: the switching transistor is a MOSFET.

[0009] In a preferred embodiment: a diode is connected between the gate and source of the MOS transistor; the SW pin of the dual-voltage constant current drive IC is connected to the positive DC output of the rectifier bridge through a resistor.

[0010] In a preferred embodiment, the system further includes a dimming module. The input of the dimming module is connected to the positive DC output of the rectifier bridge via a 10V isolated power supply module, and the output is connected to the PWM pin of the dual-voltage constant current drive IC via an optocoupler.

[0011] This utility model also provides a lamp that uses the integrated light source described above.

[0012] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0013] This invention provides a wide-voltage DOB integrated light source. A dual-voltage constant-current driver IC detects the DC voltage output from the rectifier bridge, thereby driving the switching transistor to turn on or off. This allows LED1 and LED2 on the light source board to be connected in parallel or in series. When LED1 and LED2 are connected in parallel, they are suitable for low-voltage operation. When LED1 and LED2 are connected in series, they are suitable for high-voltage operation, thus achieving wide voltage input adaptability. Furthermore, a dimming module can be added to implement dimming functionality, thus achieving a linear drive scheme with 0-10V dimming capability across a wide voltage range. Attached Figure Description

[0014] Figure 1 This is a circuit diagram of a preferred embodiment of the present invention. Detailed Implementation

[0015] To make the technical solution and features of this utility model clearer, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific examples. It should be understood that these examples are only for illustrating this utility model and are not intended to limit the scope of this utility model. After reading this utility model, any modifications of this utility model by those skilled in the art in various equivalent forms fall within the scope defined by the appended claims.

[0016] refer to Figure 1 This embodiment provides a wide-voltage DOB integrated light source, including: a light source board and a driving power supply disposed on the light source board; the driving power supply includes: a rectifier bridge, a switching transistor and a dual-voltage constant current driving IC;

[0017] The AC input terminal of the rectifier bridge is connected to the mains power, and the DC output terminal is connected to the dual-voltage constant current drive IC; the dual-voltage constant current drive IC controls the switching transistor to turn on or off according to the magnitude of the DC voltage output by the rectifier bridge.

[0018] The light source board is provided with LED1 and LED2 connected in series. The switching transistor is connected to the positive DC output of the rectifier bridge and the position where LED1 and LED2 are connected. When the switching transistor is off, LED1 and LED2 are connected in series. When the switching transistor is on, LED1 and LED2 are connected in parallel.

[0019] In this embodiment, LED1 and LED2 operate at voltages of 120V-148V respectively. When the input power is 120V AC, the switch is turned on, and LED1 and LED2 are connected in parallel, thus enabling compatibility with AC 120V input. When the input power is 277V AC, the switch is turned off, and LED1 and LED2 are connected in series, thus enabling compatibility with AC 277V input.

[0020] In this embodiment, the switching transistor is a MOSFET. The SW pin of the dual-voltage constant-current driver IC is connected to the positive DC output of the rectifier bridge via a resistor.

[0021] To further enrich functionality, a dimming module is also included. The input of the dimming module is connected to the positive DC output of the rectifier bridge via a 10V isolated power supply module, and the output is connected to the PWM pin of the dual-voltage constant current driver IC via an optocoupler. This adds dimming functionality on top of a wide voltage range.

[0022] Furthermore, in this embodiment, the dual-voltage constant current drive ICs can be cascaded to meet different power requirements. This embodiment uses three as an example, but the number can be increased or decreased.

[0023] This utility model also provides a lamp that uses the integrated light source described above, such as a space lamp panel, industrial and mining lamp, linear lamp, etc., which can achieve power-free operation and have dimming function, and can pass relevant certifications such as DLC, FCC, UL, etc.

[0024] The above is only one specific embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model.

Claims

1. A wide-voltage DOB integrated light source, characterized in that... include: Light source board and driving power supply mounted on the light source board; The driving power supply includes: a rectifier bridge, a switching transistor, and a dual-voltage constant current driving IC; The AC input terminal of the rectifier bridge is connected to the mains power, and the DC output terminal is connected to the dual-voltage constant current drive IC; the dual-voltage constant current drive IC controls the switching transistor to turn on or off according to the magnitude of the DC voltage output by the rectifier bridge. The light source board is provided with LED1 and LED2 connected in series. The switching transistor is connected to the positive DC output of the rectifier bridge and the position where LED1 and LED2 are connected. When the switching transistor is off, LED1 and LED2 are connected in series. When the switching transistor is on, LED1 and LED2 are connected in parallel.

2. The wide-voltage DOB integrated light source according to claim 1, characterized in that: The switching transistor is a MOSFET.

3. The wide-voltage DOB integrated light source according to claim 2, characterized in that: A diode is connected between the gate and source of the MOS transistor; the SW pin of the dual-voltage constant current drive IC is connected to the positive DC output of the rectifier bridge through a resistor.

4. The wide-voltage DOB integrated light source according to claim 1, characterized in that: It also includes a dimming module, the input of which is connected to the positive DC output of the rectifier bridge via a 10V isolated power supply module, and the output is connected to the PWM pin of the dual-voltage constant current drive IC via an optocoupler.

5. A lamp, characterized in that... The integrated light source according to any one of claims 1-4 is used.

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