LED driving power supply, illumination light source for refrigerator and illumination device

Abstract

The utility model discloses an LED driving power supply, a lighting source for a refrigerator and a lighting device. The LED driving power supply comprises a linear driving circuit, and a resistor is configured in a VCC bus or a load loop of the linear driving circuit to divide voltage so as to reduce the power consumption of an IC and reduce the temperature of the IC, so that the influence of heat dissipation of the IC on other elements is reduced. And the service life of the LED lamp bead is prolonged.

Description

Technical Field

[0001] This application relates to the field of driver power supply technology, and in particular to an LED driver power supply and lighting device. Background Technology

[0002] LEDs, as a light source, are gradually replacing traditional lighting due to their green, environmentally friendly, low-carbon, and energy-saving advantages. With increasing awareness of energy conservation and environmental protection, the application of LED lighting fixtures is becoming more widespread. The LED driver power supply, as a key component of LED lighting fixtures, directly affects the performance and lifespan of the LED lights. The typical volt-ampere characteristic curve of an LED driver power supply exhibits a non-linear exponential function relationship. Even a small change in the voltage across the LED light source will cause a significant change in the current flowing through it. This sudden increase in power consumption will fall on the LED chips, thus requiring a specific LED driver chip to ensure normal operation and maximize the advantages of LEDs. The quality of the LED driver power supply directly affects the lifespan of the LED lighting fixture. One reason is that the driver power supply IC generates significant heat, and this heat dissipation affects other components in the driver power supply, reducing the IC's lifespan. Therefore, reducing IC power consumption and temperature is increasingly important. Another reason is the weak surge protection capability of the driver power supply, making it susceptible to damage from high voltage.

[0003] Therefore, a new LED driver power supply is needed. Utility Model Content

[0004] To overcome at least one of the aforementioned drawbacks, this application proposes an LED driver power supply and a lighting device. This LED driver power supply exhibits low power consumption of the IC during operation and strong surge protection.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] An LED driver power supply includes: a linear driving circuit having an IC module, the IC module having: a first port electrically connected to a VCC bus branch, the VCC bus branch having a first resistor branch, the first resistor branch including at least one fuse resistor; a second port electrically grounded; a third port and a fourth port for connecting a load circuit, the load circuit being configured to include an LED bead branch arranged according to a rule and a second resistor branch, wherein the LED bead branch is connected in series with the second resistor branch, wherein the LED bead branch includes a plurality of LED beads, the second resistor branch includes at least one resistor, the resistor being disposed between two of the plurality of LED beads to reduce the voltage drop across the plurality of LED beads.

[0007] This application also discloses a lighting source for a freezer, comprising: a sealing component; a bracket; an LED filament disposed on the bracket and located within the sealing component, wherein the LED filament comprises a plurality of regularly arranged LED beads; and an LED driver power supply disposed within the sealing component and electrically connected to the LED filament, wherein the LED driver power supply comprises:

[0008] The IC module has: a first port electrically connected to a VCC bus branch, a second port electrically connected to a ground terminal, and a third and fourth port electrically connected to the LED filament; a first resistor branch connected in series between the VCC bus branch and the first port; and a second resistor branch connected in series with the LED filament, wherein the two ends of the branch after the LED filament and the second resistor branch are connected to the third and fourth ports, and the second resistor branch includes at least one resistor, which is configured between two of the plurality of LED beads to reduce the voltage drop across the plurality of LED beads.

[0009] Beneficial effects

[0010] Compared with the prior art, the LED driver power supply provided in this application has the following advantages:

[0011] 1) It has strong surge resistance and provides short-circuit protection for circuits.

[0012] 2) It can reduce the impact of LED voltage drop fluctuations and avoid increasing costs by requiring LED screening.

[0013] 3) Reduce the power consumption of the IC in the driver, thereby reducing the temperature of the IC and minimizing the impact of the IC's heat dissipation on surrounding components. Attached Figure Description

[0014] The accompanying drawings are provided to illustrate the technical solutions of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the technical solutions of this disclosure and do not constitute a limitation on the technical solutions of this disclosure. The shapes and sizes of the components in the drawings do not reflect actual proportions and are only intended to illustrate the content of this application.

[0015] Figure 1 This is a functional topology diagram of the LED driver power supply according to the first embodiment of this application;

[0016] Figure 1 a is Figure 1 A schematic diagram of the topology of an LED driver power supply;

[0017] Figure 2 This is a functional topology diagram of the LED driver power supply according to the second embodiment of this application;

[0018] Figure 2 a is Figure 2 A schematic diagram of the topology of an LED driver power supply;

[0019] Figure 3 This is a functional topology diagram of the LED driver power supply according to the third embodiment of this application;

[0020] Figure 3 a is Figure 3 A schematic diagram of the topology of an LED driver power supply. Detailed Implementation

[0021] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.

[0022] Unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. In this document, "electrical connection" includes the situation where constituent elements are connected together by an element having some electrical function. There is no particular limitation on the "electrically functioning element," as long as it enables the transmission and reception of electrical signals between the connected constituent elements. An "electrically functioning element" can be, for example, an electrode or wiring, a switching element such as a transistor, or other functional elements such as a resistor, inductor, or capacitor. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0023] In this application, the terms "upper," "lower," "inner," "middle," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0024] Example

[0025] This application provides an LED driver power supply, which includes a linear drive circuit with an equivalent VCC bus branch. Voltage division is achieved by connecting a resistor in series within the VCC bus branch. This design reduces IC power consumption and temperature, thereby minimizing the impact of IC heat dissipation on other components. In other embodiments, a fuse resistor can be connected in series within the VCC bus branch. This design, while initiating voltage division, also increases surge protection, thus providing short-circuit protection.

[0026] Another embodiment of this application provides an LED driver power supply, which includes a linear drive circuit connected to an LED chip load. A resistor (such as a series resistor) is configured in the LED chip load to reduce the temperature of the IC, thereby lowering the negative electrode temperature of the LED chip and increasing its lifespan. Additionally, connecting a resistor in series in the load circuit can reduce the impact of LED chip voltage drop fluctuations. For example, when the forward current of the LED chip is low, the voltage drop is small, which can cause excessive input-output voltage differences across the IC, increasing losses and even exceeding the IC's maximum allowable power. Therefore, LED selection is required, which increases costs. Connecting a resistor in series in the load circuit to boost the voltage can transfer some of the IC's power to the resistor, ensuring normal circuit operation. In one embodiment, configuring a resistor in the LED chip load can be described as a resistor interspersed between the LED chips (such as between two LED chips), which also reduces the voltage drop across the LED chips.

[0027] Next, the LED driver power supply proposed in this application will be described with reference to the accompanying drawings. Figure 1 The diagram shows a topology of an LED driver power supply according to an embodiment of this application. The LED driver power supply includes an IC module with: a first port electrically connected to the VCC bus branch; a second port electrically connected to ground (GND); a third port and a fourth port for connecting a load circuit. The load circuit includes LED bead branches arranged according to a rule and a second resistor branch, with the LED bead branches and the second resistor branch connected in series. That is, the two ends of the branch after the LED bead branches and the second resistor branch are connected to the third port and the fourth port. The resistor may include one, two, or more resistors. The LED driver power supply includes an AC to DC module and a DC to DC module. Preferably, the function of the DC to DC module is integrated into the IC. The LED bead branches may be LED filaments in some cases. Preferably, the topology is shown below. Figure 1A As shown, the LED lamp bead branch includes a plurality of LED lamp beads. This LED lamp bead branch is connected to one end of resistor R1, and the other end of resistor R1 is connected to IC module U1. One end of capacitor C1 is connected to VCC, and the other end is electrically grounded. As... Figure 1Implementation a is a variation of the above implementation, such as Figure 2 This is a schematic diagram of the topology of the LED driver power supply according to the second embodiment of this application;

[0028] Figure 2 Implementation methods and Figure 1 The difference in the implementation method is that the first resistor branch is connected in series with the VCC bus branch, and the third and fourth ports of the IC module are connected to the LED bead load. A topology diagram in one implementation is shown below. Figure 2 As shown in Figure a, the LED lamp bead branch includes a plurality of LED lamp beads. The two ends of this LED lamp bead branch are connected to IC module U2, one end of resistor R2 is connected to VCC, and the other end is electrically grounded through capacitor C2.

[0029] As a variation of the above-described implementation method, such as Figure 3 This is a schematic diagram of the topology of the LED driver power supply according to the third embodiment of this application. Figure 3 Implementation methods and Figure 1 The difference in the implementation method lies in the configuration of a first resistor branch within the VCC bus branch. This first resistor branch may include one, two, or more resistors.

[0030] This application provides an LED driver power supply, which includes a linear drive circuit with an equivalent VCC bus branch. Voltage division is achieved by connecting a resistor in series within the VCC bus branch. This design reduces IC power consumption and temperature, thereby minimizing the impact of IC heat dissipation on other components. In other embodiments, a fuse resistor, which can be a surface-mount resistor, can be connected in series within the VCC bus branch. This design, while initiating voltage division, also increases surge protection, thus providing short-circuit protection. A topology diagram in one embodiment is shown below. Figure 3 As shown in Figure a, one end of the LED lamp bead branch is connected to one end of resistor R4, and the other end is connected to IC module U3; one end of resistor R3 is connected to VCC, and the other end is electrically grounded through capacitor C3.

[0031] This application provides a lighting device equipped with the aforementioned LED driver power supply. The lighting device is configured with LED beads arranged in a specific pattern. The driver power supply operates linearly, causing the LED beads to emit light. In this embodiment, by connecting a resistor in series with the LED load of the lighting device, the temperature of the IC in the LED driver power supply is reduced, thereby lowering the negative electrode temperature of the LED and increasing its lifespan. This lighting device can be used in enclosed environments such as refrigerators, where the lighting source has sealed components. This results in poor heat dissipation during operation, and if the heat from the IC in the driver power supply cannot be dissipated in time, the reliability of the lighting source will be reduced. This application provides a lighting source for refrigerators equipped with the aforementioned driver power supply. During operation, the lighting source can reduce IC power consumption and temperature, thereby improving IC heat dissipation, reducing the impact of IC heat dissipation on other components, and improving the reliability of the lighting source.

[0032] In one embodiment, the lighting device further includes a bracket on which an LED filament is disposed.

[0033] The above embodiments are only for illustrating the technical concept and features of this application, and are intended to enable those skilled in the art to understand the content of this application and implement it accordingly. They should not be construed as limiting the scope of protection of this application. The self-propelled device described above can be a service robot. All equivalent transformations or modifications made in accordance with the spirit and essence of this application should be included within the scope of protection of this application.

Claims

1. An LED driver power supply, characterized in that, include: A linear drive circuit, wherein the linear drive circuit includes an IC module, the IC module having: The first port is electrically connected to the VCC bus branch, which has a first resistor branch, and the first resistor branch includes at least one fuse resistor. The second port is electrically grounded; The third and fourth ports are used to connect a load circuit, which is configured to include an LED bead branch arranged according to a rule and a second resistor branch. The LED bead branch is connected in series with the second resistor branch. The LED bead branch includes a plurality of LED beads, and the second resistor branch includes at least one resistor. The resistor is disposed between two of the plurality of LED beads to reduce the voltage drop across the plurality of LED beads.

2. The LED driver power supply as described in claim 1, characterized in that, The two ends of the branch formed by the LED lamp bead branch and the second resistor branch connected in series are connected to the third port and the fourth port.

3. The LED driver power supply as described in claim 1, characterized in that, The second resistor branch includes one, two, or more resistors.

4. The LED driver power supply as described in claim 1, characterized in that, The fuse resistor is a surface mount type.

5. The LED driver power supply as described in claim 1, characterized in that, The linear drive circuit includes a DC-to-DC converter module, and the function of the DC-to-DC converter module is integrated into the IC module.

6. A lighting source for a freezer, characterized in that, include: Sealing components; support; An LED filament is disposed on the bracket and located within the sealing component, wherein the LED filament comprises a plurality of regularly arranged LED beads; as well as An LED driver power supply is disposed within the sealed component and electrically connected to the LED filament, wherein the LED driver power supply comprises: The IC module has: a first port electrically connected to the VCC bus branch, a second port electrically connected to the ground terminal, and a third and a fourth port electrically connected to the LED filament; A first resistor branch is connected in series between the VCC bus branch and the first port; and The second resistor branch is connected in series with the LED filament, wherein the two ends of the branch after the LED filament and the second resistor branch are connected to the third port and the fourth port. The second resistor branch includes at least one resistor, which is configured between two of the plurality of LED beads to reduce the voltage drop across the plurality of LED beads.

7. A lighting source for a freezer as described in claim 6, characterized in that, The second resistor branch includes one, two, or more resistors.

8. A lighting source for a freezer as described in claim 6, characterized in that, The LED driver power supply includes a DC-DC converter module, and the function of the DC-DC converter module is integrated into the IC module.

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