a surge protector

A surge protector, a part of the technology, applied in the direction of emergency protection circuit devices, semiconductor devices, electric solid devices, etc., can solve the problems of difficult determination of capacitance capacity, large number of components, large occupation area, etc., and achieve low power consumption , the effect of small number of components and small footprint

Active Publication Date: 2016-05-25
ZHEJIANG MINGDE MICROELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The RCD snubber circuit in the prior art mainly has the following defects: 1. The number of components is large, 2. It occupies a large area and consumes a lot of power. 3. It is difficult to determine the capacitance capacity, which generally needs to be calculated according to experience

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0025] like Figure 2-4 As shown, a surge protector includes a plastic package 1, two sets of upper frames 31, 33 and lower frames 32, 34 encapsulated in the plastic package 1, and high voltage diodes welded on the upper frame 31 and the lower frame 32 The chip 41, the transient voltage suppression diode core 42 welded on the upper frame 33 and the lower frame 34, the upper frame 31, 33 and the lower frame 32, 34 are packaged in pairs, and a part is exposed outside the plastic package 1 to form a lead terminal 21, 22, 23, 24, the other part is packaged in the plastic package 1 for welding the high-voltage diode chip 41 and the transient voltage suppression diode chip 42; the diode chips 41 and 42 are all on the same level, and are packaged side by side in the plastic package In body 1, they are not connected to each other.

Embodiment 2

[0027] like Figure 5-6 As shown, a surge protector includes a plastic package body 1, a set of upper frame 31 and a lower frame 32 packaged in the plastic package body 1, and a high voltage diode chip 41 and an instantaneous state voltage suppression diode core 42, the upper frame 31 and the lower frame 32 are packaged in pairs, a part is exposed outside the plastic package 1 to form lead terminals 21 and 22, and the other part is packaged in the plastic package 1 for welding and stacking in series Together with the high-voltage diode chip 41 and the transient voltage suppression diode chip 42, the plastic package 1 can be in the shape of a sheet, a cylinder or other shapes.

[0028] like Figure 7 As shown, the above-mentioned surge protector is mainly used in the peak pulse absorbing circuit. When the peak pulse generated at the moment the switching tube is turned off is superimposed on the input voltage, the high voltage diode chip 41 conducts forward, and the transient v...

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PUM

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Abstract

The invention discloses a surge protector, belonging to the field of semiconductor devices, comprising a plastic package, an upper frame, a lower frame, and a diode chip welded on the upper frame and the lower frame. The upper frame and the lower frame are packaged in pairs, and a part It is exposed outside the plastic package to form lead terminals, and the other part is packaged in the plastic package for welding diode chips; the diode chip includes a high-voltage diode chip and a transient voltage suppression diode chip, and the two chips are packaged or stacked horizontally series package. The above-mentioned surge protector adopts a double-chip integrated package, uses a small number of components, occupies a small area, and has high reliability and low power consumption.

Description

technical field [0001] The invention relates to a surge protector and belongs to the field of semiconductor devices. Background technique [0002] The RCD absorbing circuit is composed of resistor Rs, capacitor Cs and diode VDs, such as figure 1 As shown, its main function is to absorb the peak pulse generated at the moment the switch tube is disconnected, so as to avoid breakdown damage to the switch tube. The RCD snubber circuit in the prior art mainly has the following defects: 1. The number of components is large; 2. It occupies a large area and consumes a lot of power; [0003] In view of this, the inventor conducted research on this, and developed a surge protector specifically for the RCD spike absorbing circuit, and this case arose from it. Contents of the invention [0004] The purpose of the present invention is to provide a surge protector suitable for RCD peak pulse absorbing circuit, which has the characteristics of few components, high reliability and low p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/04H01L25/07H01L23/31
CPCH01L24/33H01L2224/32145H01L2224/32245H01L2924/181H01L2924/00012
Inventor 邓爱民张文成谢晓东
Owner ZHEJIANG MINGDE MICROELECTRONICS CO LTD
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