Single-phase bridge type rectifier circuit and three-phase bridge type rectifier circuit

Abstract

The invention relates to a single-phase bridge type rectifier circuit and a three-phase bridge type rectifier circuit. The single-phase bridge type rectifier circuit comprises straight insertion type elements, wherein each straight insertion type element comprises a lead frame, a first chip and a second chip, the lead frame comprises first, second and third pins, and first and second islands; the first chip is a diode chip and is arranged on the first island; the second chip is a diode chip and is arranged on the second island, the first chip and the second chip are contacted with the chip islands through the same sides; the first pin is electrically connected to the first island, and the second pin is electrically connected to the second island; the side, opposite to the first island, of the first chip is connected to the second island, and the side, opposite to the second island, of the second chip is electrically connected to the third pin; the first and third pins of the two elements are respectively used as two direct current output ends of the single-phase bridge type rectifier circuit; and second pins of the two elements are respectively used as alternating current input ends of the single-phase bridge type rectifier circuit. According to the single-phase bridge type rectifier circuit and the third-phase bridge type rectifier circuit, the cooling performance is excellent, the processing procedure and the cost are saved, and the accordance and reliability of products can be improved.

Description

technical field [0001] The invention relates to a circuit for changing an AC input into a DC output, in particular to a single-phase bridge rectifier circuit, and also to a three-phase bridge rectifier circuit. Background technique [0002] Bridge rectifiers (Bridge Rectifiers), also known as bridge rectifiers, are the most commonly used circuits that use the unidirectional conductivity of diodes for rectification, and are often used to convert alternating current into direct current. [0003] A traditional single-phase bridge rectifier is made of 4 rectifier diodes connected in a bridge type, wherein a single rectifier diode is formed by packaging a diode chip with insulating plastic and conductor leads. However, the single-phase bridge rectifier with four rectifier diodes packaged in one device needs to form a multi-level relationship of common anode, common cathode and series connection in the packaged device body, and the structure is relatively complicated, so generally...

AI Technical Summary

Problems solved by technology

However, the single-phase bridge rectifier with four rectifier diodes packaged in one device needs to form a multi-level relationship of common anode, common cathode and series connection in the packaged device body, and the structure is relatively complicated, so generally only fully insulated bridge rectifiers can be used. Type package, resulting in poor heat dissipation

And because the chip packaging process needs to reverse the chip and other procedures, it is also difficult to use fully automatic processing methods, the processing process is more cumbersome, and the product consistency and reliability are poor.

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