KR20050015743A - Apparatus for Controlling Serge - Google Patents

Abstract

PURPOSE: A surge controller is provided to minimize amount of surge by forming a pattern between a signal node and a signal node in a surge protector wider than another pattern between an inter-element signal node and a target component. CONSTITUTION: A surge controller protects target components from a surge from a signal node(23) on a PCB(Printed Circuit Board). The surge controller includes a surge protector(22). The surge protector is coupled with the signal node via the first pattern(25) having a predetermined width and is coupled with the target components via the second pattern(26) which has a width smaller than that of the first pattern. The surge protector further includes a ground node(24) and an inter-element signal node. The inter-element signal node is opened from the ground node under a normal state below a breakdown voltage to guide the current from the first pattern to the second pattern. The inter-element signal node is coupled with the ground node to dissipate the surge under an emergent state over the breakdown voltage caused by the surge.

Description

Surge Control Unit {Apparatus for Controlling Serge}

The present invention relates to a surge control device. In particular, the PCB pattern between the signal terminal and the surge protector is designed to have a wider pattern width than the PCB pattern between the surge countermeasure and the component to be protected. By doing so, the present invention relates to a surge control device which minimizes the surge flowing into the protection target part by using a difference in resistance due to the difference in the pattern width.

In general, electronic components such as resistors, capacitors, surge protection devices such as varistors and transient voltage suppressor diodes, and the like are printed in lead wires in electronic equipment such as industrial devices and home appliances. It is mounted on a printed circuit board (PCB).

FIG. 1 is a front view of a PCB on which a surge countermeasure element is mounted. As shown therein, a signal terminal 11 is formed on a PCB 10, and the signal terminal 11 has a pattern 12 designed to have a constant width. It is connected to the corresponding electronic component (not shown) through, and the surge protection device 13 is mounted on the pattern 12 between the signal terminal 11 and the electronic component.

The surge countermeasure element 13 implemented as a varistor or TVS diode has a fast response speed with respect to an external transient voltage, has a low leakage current value and an inductance value, and has high reliability against electrostatic discharge (ESD).

The surge countermeasure element 13 is composed of a ground terminal 14 and a signal terminal 15 in the element to act as a high resistance non-conductor, which is not normally operated. When inflow, it operates above breakdown voltage and grounds overcurrent due to surge.

However, conventionally, the width of the pattern between the signal terminal and the surge countermeasure and the pattern between the surge countermeasure and the component to be protected are the same.

Therefore, due to the same pattern width, the resistance value of each section is the same so that all surges flowing through the corresponding signal terminals are not grounded at the surge countermeasure, but are also introduced to the component to be protected so as to protect the electronic components from the surges. There was a problem of lowering the effectiveness of the countermeasure element.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its object is to design a pattern between the signal terminal and the surge countermeasure element on a PCB so that the width is wider than the pattern between the surge countermeasure element and the component to be protected, so that the difference in the corresponding pattern width This is to minimize the amount of surge flowing into the part to be protected due to the difference in resistance due to

The surge control device of the present invention for achieving the above object, in the surge control device for protecting the target component from the surge flowing through the signal terminal on the PCB, the first pattern of a predetermined width with the signal terminal And a surge countermeasure element connected to the protection target part in a second pattern having a width narrower than that of the first pattern.

Preferably, the surge protection device comprises a ground terminal; When the first pattern and the second pattern are connected, and in a normal state below the breakdown voltage, the current is opened from the ground terminal and applied to the first pattern as the second pattern, and the breakdown due to the surge inflow In the case of voltage or higher, the device may include a signal terminal in a device that is short-circuited to the ground terminal to ground the surge.

Also preferably, the first pattern may be connected to the signal device in the device at a part spaced apart from the connection part of the second pattern as much as possible.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a diagram showing the structure of a surge control device according to an embodiment of the present invention.

Referring to FIG. 2, a surge control device according to the present invention includes a signal terminal 21 formed on a PCB 20, a surge countermeasure element 22 including a signal terminal 23 and a ground terminal 24 in a device. And a component to be protected (not shown), wherein the signal terminal 21 and the signal terminal 23 in the device are connected in a first pattern 25, and the signal terminal 23 in the device and the component to be protected ( The second pattern 26 is connected to the second pattern 26, and the first pattern 25 is designed to have a wider width than the second pattern 26, and as a result, the resistance is smaller than the second pattern 26.

Here, the first pattern 25 is replaced with the second pattern (2) so that a large amount of surge is grounded through the ground terminal 24 and the minimum surge flows into the component to be protected (not shown). 26) It is desirable to design such that it is connected to the signal terminal 23 in the device as far apart as possible from the connection site.

The surge countermeasure element 22 composed of the signal terminal 23 and the ground terminal 24 in the device normally acts as a high resistance insulator by opening the signal terminal 23 in the device from the ground terminal 24. By applying the current flowing from the signal terminal 21 to the signal terminal 23 in the device through the first pattern 25 to the component to be protected (not shown) through the second pattern 26, Above the breakdown voltage, the signal terminal 23 and the ground terminal 24 in the element are shorted to ground the surge flowing from the signal terminal 21 through the first pattern 25 through the ground terminal 24. .

At this time, when the external surge flows in, the resistance of the first pattern 25 is inversely proportional to the width of each pattern with respect to the signal terminal 23 in the device, which is a branch point between the ground terminal 24 and the component to be protected (not shown). Since the resistance is smaller than the resistance of the two patterns 26, the amount of the surge is grounded through the ground terminal 24 and the amount of surge introduced into the object to be protected (not shown) is reduced compared with the conventional.

Meanwhile, the first pattern may be designed to have a different width depending on the type of the component to be protected.

In addition, the embodiment according to the present invention is not limited to the above description, and various alternatives, modifications, and changes can be made within the scope apparent to those skilled in the art.

As described above, the present invention designs the pattern between the signal terminal and the signal terminal in the surge countermeasure element wider than the pattern between the signal terminal and the component to be protected on the PCB, due to the difference in resistance value in inverse proportion to the width of the pattern By minimizing the amount of surge flowing into the component to be protected, the electronic components can be effectively protected.

1 shows a conventional PCB pattern.

Figure 2 shows a surge control device according to the present invention.

Explanation of symbols on the main parts of the drawings

20: PCB 21: signal terminal

22: surge protection device 23: signal terminal in the device

24: ground terminal 25: first pattern

26: second pattern

Claims (3)

In the surge control device for protecting the target component from the surge flowing through the signal terminal on the PCB, And a surge protection device connected to the signal terminal in a first pattern having a predetermined width and connected to the protection target part in a second pattern having a narrower width than the first pattern. The method of claim 1, The surge countermeasure includes a ground terminal; When the first pattern and the second pattern are connected, and in a normal state below the breakdown voltage, the current is opened from the ground terminal and applied to the first pattern as the second pattern, and the breakdown due to the surge inflow And a signal terminal in the element which is shorted to the ground terminal to ground the surge when the voltage is higher than the ground terminal. The method of claim 2, And the first pattern is connected to the signal element in the device at a part spaced apart from the connection part of the second pattern as much as possible.