High-power anti-surge alloy sheet resistor with double-sided resistive layer structure

Abstract

The objective of the invention is to provide a high-power anti-surge alloy sheet resistor with a double-sided resistive layer structure. The high-power anti-surge alloy sheet resistor comprises a heatdissipating substrate, wherein the upper and lower sides of the heat dissipating substrate are provided with resistive layers, insulating layers are arranged between the heat dissipating substrate and the resistive layers, and protection layers are arranged out of the resistive layers. According to the high-power anti-surge alloy sheet resistor with the double-sided resistive layer structure in the invention, the resistive layers cover two surfaces of the heat dissipating substrate; when current passes through the upper and lower resistive layers, effect equivalent to the parallel connectionof two circuits is produced; since the current of the whole chip resistor is distributed to the two resistive layers, current passing through the resistive layers is reduced, the heat generation of the chip resistor is greatly lowered, and heat is directly transmitted to the heat dissipating substrate through the upper and lower resistive layers; and thus, the heat transfer of the entire resistoris improved, and heat distribution is more uniform.

Description

technical field [0001] The invention belongs to the technical field of electronic components, in particular to a high-power anti-surge alloy sheet resistor with a double-sided resistive layer structure. Background technique [0002] In the current sampling scheme, the current value can be fed back by measuring the change of the magnetic flux in the wire, especially the appearance of low-resistance resistors, which provides a more reliable and convenient design scheme for current sampling. The principle is to convert the difficult-to-detect current The signal is converted into a voltage signal that is easy to detect, thereby feeding back the magnitude of the current value, which plays the role of protecting the safety of the circuit and feeding back the circuit signal. And other advantages have become the first choice for current sampling design. [0003] First of all, in the manufacturing process of alloy chip resistors with a single-layer resistance layer structure, due to...

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Problems solved by technology

[0003] First of all, in the manufacturing process of alloy chip resistors with a single-layer resistance layer structure, due to the need to adjust the resistance value, it is often necessary to etch, stamp or laser burn on the resistance layer to form a specific resistance circuit. This process will inevitably lead to the resistance of the resistance layer. The cross-sectional area of ​​the actual passing current becomes smaller, resulting in a smaller power of the product, lowering the pulse energy level of the resistor, resulting in worsening of the surge resistance of the resistor, shortening the long-term service life of the resistor, and reducing the reliability of the resistor

Secondly, the chip resistor with a single-layer resistor layer structure is limited by the size of the resistor body, so it is difficult to achieve a small resistance value

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