Linear voltage regulator with over-temperature protection structure

Abstract

The linear voltage regulator with the over-temperature protection structure comprises a voltage regulator body, first pins are arranged on the surfaces of the two sides of the voltage regulator body in a penetrating mode respectively, one end of each first pin is inserted into the side surface of the voltage regulator body and connected with an internal circuit, and the other end of each first pin is connected with an over-temperature protection structure. An over-temperature protection structure is arranged on the side surface of the voltage stabilizer body, and the over-temperature protection structure is provided with a second pin and a PTC resistor to achieve real-time disconnection of a circuit when the temperature of the voltage stabilizer body is too high. According to the linear voltage regulator with the over-temperature protection structure, the PTC resistor is installed on the side surface of the voltage regulator body through the connecting box, the two ends of the PTC resistor are connected with a device circuit and the second pin respectively, the PTC resistor can be connected in series in the circuit through the second pin, when the temperature of the voltage regulator body rises, the resistance value of the PTC resistor is increased, and the over-temperature protection structure is formed. Therefore, the current of the voltage stabilizer body is cut off in time, and the voltage stabilizer body is prevented from being damaged due to high temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of linear voltage regulators, and particularly relates to a linear voltage regulator provided with an over-temperature protection structure. Background Technique

[0002] A linear voltage regulator is an electronic component that can keep the output voltage stable when the input voltage changes. By adjusting the conduction degree of a power transistor inside it to control the output voltage, the linear voltage regulator can provide a very stable output voltage, so it is widely used in circuits to ensure the stable output of the circuit voltage.

[0003] Since the linear voltage regulator will generate heat during use, an over-temperature protection mechanism is usually provided inside the linear voltage regulator to ensure its normal operation. At present, the over-temperature protection structure of the linear voltage regulator usually sets a temperature sensor to detect temperature changes and uses the sensor to trigger protection. However, there is a certain time delay in the corresponding process of the sensor. When the linear voltage regulator is impacted by an instantaneous large current, it may cause the voltage regulator to have suffered a certain degree of thermal damage before the over-temperature protection is started, affecting its performance and service life. Content of the Utility Model

[0004] The purpose of the utility model is to provide a linear voltage regulator provided with an over-temperature protection structure. Another PTC resistor is arranged on the surface of the linear voltage regulator body, and the PTC resistor is used to provide timely over-temperature protection for the linear voltage regulator, so as to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A linear voltage regulator provided with an over-temperature protection structure, including a voltage regulator body. One-pin leads are respectively penetrated and arranged on both side surfaces of the voltage regulator body. One end of the one-pin lead is inserted into the side surface of the voltage regulator body and connected to the internal circuit. An over-temperature protection structure is arranged on the side surface of the voltage regulator body. The over-temperature protection structure is provided with a two-pin lead and a PTC resistor to realize the real-time disconnection of the circuit of the voltage regulator body when the temperature is too high.

[0006] Preferably, the over-temperature protection structure includes a connection box. The connection box is made of insulating material and is a box-shaped structure with one side open. The connection box is embedded and fixed on one side surface of the voltage regulator body. A PTC resistor is arranged inside the connection box. The PTC resistor is fixedly connected to the inner wall of the connection box through insulating material. A two-pin lead is fixedly installed on the inner wall of the connection box. Wires are respectively arranged at both ends of the PTC resistor. One wire of the PTC resistor penetrates the surface of the connection box and is connected to the internal circuit of the voltage regulator body. The other wire of the PTC resistor is connected to the two-pin lead.

[0007] With the above technical solution, the over-temperature protection structure can be used to achieve overheat protection of the voltage regulator body, avoiding damage to the voltage regulator body due to high temperature.

[0008] Preferably, a heat dissipation structure is provided on the surface of the voltage regulator body, and the heat dissipation structure is provided with heat dissipation holes to improve the heat dissipation performance of the voltage regulator body.

[0009] With the above technical solution, the heat dissipation structure can be used to dissipate heat from the voltage regulator body.

[0010] Preferably, the heat dissipation structure includes heat dissipation holes, the heat dissipation holes are arranged through the lower surface of the voltage regulator body, and there are 2 rows of heat dissipation holes arranged in parallel, and a filter screen is arranged on the inner wall of the heat dissipation holes.

[0011] With the above technical solution, the heat dissipation holes provided on the lower surface of the voltage regulator body can be used to dissipate heat from the voltage regulator body.

[0012] Preferably, a support structure is provided on the lower surface of the voltage regulator body, and the support structure is provided with support members to support the lower surface of the voltage regulator body, facilitating heat dissipation by the heat dissipation structure.

[0013] With the above technical solution, the support members can form a gap between the lower surface of the voltage regulator body and the circuit board, thereby improving the heat dissipation effect.

[0014] Preferably, the support structure includes support members, the support members are of an n-shaped structure, the upper surface of the support members is fixedly connected to the lower surface of the voltage regulator body, there are 3 support members, the 3 support members are arranged in parallel and staggered with 2 groups of heat dissipation holes, and heat dissipation fins are arranged through the surface of the support members, and one end of the heat dissipation fins is inserted into the interior of the voltage regulator body.

[0015] With the above technical solution, the heat dissipation fins on the surface of the support members can further increase the heat dissipation performance of the device.

[0016] Compared with the prior art, the beneficial effects of the present utility model are: the linear voltage regulator provided with an over-temperature protection structure:

[0017] 1. In this device, a PTC resistor is installed on the side surface of the voltage regulator body through a connection box, and both ends of the PTC resistor are respectively connected to the device circuit and the second pin. The second pin can be used to connect the PTC resistor in series in the circuit. When the temperature of the voltage regulator body rises, the resistance value of the PTC resistor increases, thereby timely cutting off the current of the voltage regulator body and avoiding damage to the voltage regulator body due to high temperature;

[0018] 2. The device is provided with heat dissipation holes on the lower surface of the voltage regulator body, and the heat dissipation holes are used to dissipate the heat inside the voltage regulator body. A filter screen is arranged on the inner wall of the heat dissipation holes to intercept the dust in the air flowing through the heat dissipation holes, so as to prevent the dust from entering the inside of the voltage regulator body;

[0019] 3. The device is provided with a support on the lower surface of the voltage regulator body. The support can be used to install the voltage regulator body between the circuit board, so that there is a gap between the heat dissipation holes on the lower surface of the voltage regulator body and the circuit board, increasing the heat dissipation performance. And heat dissipation fins are arranged on the surface of the support and penetrate through the surface of the voltage regulator body, further increasing the heat dissipation performance of the device. Brief Description of the Drawings

[0020] Figure 1 is a front view structural schematic diagram of the present utility model;

[0021] Figure 2 is a bottom view structural schematic diagram of the present utility model;

[0022] Figure 3 is a structural schematic diagram of the heat dissipation holes of the present utility model;

[0023] Figure 4 is a structural schematic diagram of the support and heat dissipation fins of the present utility model;

[0024] Figure 5 is a top cross-sectional structural schematic diagram of the connection box of the present utility model;

[0025] Figure 6 is a bottom view structural schematic diagram of the connection box and the PTC resistor of the present utility model.

[0026] In the figure: 1, voltage regulator body; 2, first pin; 3, second pin; 4, connection box; 5, PTC resistor; 6, heat dissipation hole; 7, filter screen; 8, support; 9, heat dissipation fin. Detailed Description of the Embodiment

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] Please refer to Figures 1 - 6 , the present utility model provides a technical solution: a linear voltage regulator with an over-temperature protection structure, including a voltage regulator body 1, a first pin 2, a second pin 3, a connection box 4, a PTC resistor 5, a heat dissipation hole 6, a filter screen 7, a support 8, and a heat dissipation fin 9.

[0029] On both side surfaces of the voltage regulator body 1, first pins 2 are respectively arranged in a penetrating manner. One end of each first pin 2 is inserted into the side surface of the voltage regulator body 1 and connected to the internal circuit. A over-temperature protection structure is arranged on the side surface of the voltage regulator body 1. The over-temperature protection structure sets a second pin 3 and a PTC resistor 5 to realize real-time disconnection of the circuit of the voltage regulator body 1 when the temperature is too high. The over-temperature protection structure includes a connection box 4. The connection box 4 is made of insulating material and is a box-shaped structure with one side open. The connection box 4 is fixedly embedded on one side surface of the voltage regulator body 1. A PTC resistor 5 is arranged inside the connection box 4. The PTC resistor 5 is fixedly connected to the inner wall of the connection box 4 through insulating material. A second pin 3 is fixedly installed on the inner wall of the connection box 4. Wires are respectively arranged at both ends of the PTC resistor 5. One wire of the PTC resistor 5 penetrates the surface of the connection box 4 and is connected to the internal circuit of the voltage regulator body 1. The other wire of the PTC resistor 5 is connected to the second pin 3;

[0030] As Figure 1 , Figure 5 and Figure 6 shown, when using this device, the voltage regulator body 1 is connected to the circuit board by using the first pins 2 and the second pins 3 on the surface of the voltage regulator body 1, so that the voltage regulator body 1 is connected in series with the circuit. At this time, the PTC resistor 5 is synchronously connected in series to the circuit through the second pin 3. The voltage regulator body 1 can be used to adjust the output voltage in the circuit. When the voltage regulator body 1 generates heat after long-term use, the temperature of the PTC resistor 5 rises, so that the resistance value of the PTC resistor 5 increases, thereby reducing the current passing through the voltage regulator body 1 and avoiding damage to the voltage regulator body 1 caused by high temperature. When the temperature of the voltage regulator body 1 drops, the resistance value of the PTC resistor 5 decreases, and the current passing through the voltage regulator body 1 returns to the initial level.

[0031] A heat dissipation structure is arranged on the surface of the voltage regulator body 1. The heat dissipation structure sets heat dissipation holes 6 to improve the heat dissipation performance of the voltage regulator body 1. The heat dissipation structure includes heat dissipation holes 6. The heat dissipation holes 6 are arranged in a penetrating manner on the lower surface of the voltage regulator body 1, and 2 rows of heat dissipation holes 6 are arranged in parallel. A filter screen 7 is arranged on the inner wall of the heat dissipation holes 6. A support structure is arranged on the lower surface of the voltage regulator body 1. The support structure sets support members 8 to support the lower surface of the voltage regulator body 1, which is convenient for the heat dissipation structure to dissipate heat. The support structure includes support members 8. The support members 8 are of an n-shaped structure. The upper surface of the support members 8 is fixedly connected to the lower surface of the voltage regulator body 1. There are 3 support members 8, and the 3 support members 8 are arranged in a parallel and staggered manner with 2 groups of heat dissipation holes 6. Heat dissipation fins 9 are arranged in a penetrating manner on the surface of the support members 8. One end of each heat dissipation fin 9 is inserted into the inside of the voltage regulator body 1;

[0032] As Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, when the voltage regulator body 1 is installed, the support member 8 on the lower surface of the voltage regulator body 1 contacts the surface of the circuit board, so that there is a gap between the lower surface of the voltage regulator body 1 and the surface of the circuit board. At this time, the heat dissipation holes 6 on the lower surface of the voltage regulator body 1 can dissipate heat from the inside of the voltage regulator body 1, and a filter screen 7 is provided on the inner wall of the heat dissipation holes 6. The filter screen 7 can prevent dust from entering the inside of the voltage regulator body 1 during the heat dissipation process. The heat dissipation fins 9 on the surface of the support member 8 can further improve the heat dissipation performance of the voltage regulator body 1.

[0033] Working principle: When using the linear voltage regulator with an over-temperature protection structure, connect the first pin 2 and the second pin 3 on the surface of the voltage regulator body 1 to the circuit board, so that the voltage regulator body 1 is connected in series with the circuit to adjust the output voltage of the circuit. When the voltage regulator body 1 heats up, the temperature of the PTC resistor 5 rises and its resistance value increases, so that the current of the voltage regulator body 1 decreases, preventing the voltage regulator body 1 from being damaged by overheating. The heat dissipation holes 6 on the lower surface of the voltage regulator body 1 can dissipate heat from the voltage regulator body 1, and the filter screen 7 on the inner wall of the heat dissipation holes 6 can prevent dust from entering the voltage regulator body 1 through the heat dissipation holes 6 during the heat dissipation process, causing damage, which increases the overall practicality.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A linear voltage regulator with an over-temperature protection structure, comprising a voltage regulator body (1), and first pins (2) are respectively penetrated through both side surfaces of the voltage regulator body (1). One end of each first pin (2) is inserted into the side surface of the voltage regulator body (1) and connected to the internal circuit. It is characterized in that: The side surface of the voltage regulator body (1) is provided with an over-temperature protection structure. The over-temperature protection structure sets the second pin (3) and the PTC resistor (5) to realize the real-time disconnection of the circuit of the voltage regulator body (1) when the temperature is too high.

2. The linear voltage regulator with an over-temperature protection structure according to claim 1, wherein: The over-temperature protection structure includes a connection box (4). The connection box (4) is made of insulating material and is a box-shaped structure with one side open. The connection box (4) is fixedly embedded on one side surface of the voltage regulator body (1). The PTC resistor (5) is arranged inside the connection box (4). The PTC resistor (5) is fixedly connected to the inner wall of the connection box (4) through an insulating material. The second pin (3) is fixedly installed on the inner wall of the connection box (4). Wires are respectively arranged at both ends of the PTC resistor (5). One end wire of the PTC resistor (5) penetrates through the surface of the connection box (4) and is connected to the internal circuit of the voltage regulator body (1). The other end wire of the PTC resistor (5) is connected to the second pin (3).

3. A linear voltage regulator with an over-temperature protection structure according to claim 1, characterized in that: The surface of the voltage regulator body (1) is provided with a heat dissipation structure. The heat dissipation structure sets heat dissipation holes (6) to improve the heat dissipation performance of the voltage regulator body (1).

4. The linear voltage regulator with an over-temperature protection structure according to claim 3, characterized in that: The heat dissipation structure includes heat dissipation holes (6). The heat dissipation holes (6) are arranged through the lower surface of the voltage regulator body (1), and 2 rows of heat dissipation holes (6) are arranged in parallel. A filter screen (7) is arranged on the inner wall of the heat dissipation holes (6).

5. A linear voltage regulator with an over-temperature protection structure according to claim 1, characterized in that: The lower surface of the voltage regulator body (1) is provided with a support structure. The support structure sets support members (8) to support the lower surface of the voltage regulator body (1), facilitating heat dissipation by the heat dissipation structure.

6. The linear voltage regulator with an over-temperature protection structure according to claim 5, wherein: The support structure includes support members (8). The support members (8) are in an n-shaped structure. The upper surface of the support members (8) is fixedly connected to the lower surface of the voltage regulator body (1). There are 3 support members (8). The 3 support members (8) are arranged in parallel and staggered with 2 groups of heat dissipation holes (6). Heat dissipation fins (9) are arranged through the surface of the support members (8). One end of the heat dissipation fins (9) is inserted into the inside of the voltage regulator body (1).

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