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600 V / 5 A FET-triggered lateral opto-triac

L. Leipold, C. Fellinger

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Abstract

Besides being used in the production of MOS transistors, the SIPMOS® (short for Siemens Power MOS) technology permits the manufacture of components in which bipolar and MOS structures are functionally integrated, e.g. an FET-controlled optotriac. This component consists of two inverse-parallel connected lateral thyristors which are driven with the aid of vertical MOS transistors. A highly sensitive phototransistor supplies the gate voltage of the vertical MOS transistors. The lateral thyristors are implemented by means of interlocking, finger-like structures which enable good chip utilization. The triac features a 4 × 4 mm2chip and has a blocking voltage of more than 600 V in both directions. An LED current of 2 mA is sufficient to trigger the component. For a continuous current of 5 A this results in a current-transfer-ratio of 2,500 to 1.

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What this paper is about

Besides being used in the production of MOS transistors, the SIPMOS® (short for Siemens Power MOS) technology permits the manufacture of components in which bipolar and MOS structures are functionally integrated, e.g. an FET-controlled optotriac. This component consists of two inverse-parallel connected lateral thyristors which are driven with the aid of vertical MOS transistors. A highly sensitive phototransistor supplies the gate voltage of the vertical MOS transistors. The lateral thyristors are implemented by means of interlocking, finger-like structures which enable good chip utilization. The triac features a 4 × 4 mm2chip and has a blocking voltage of more than 600 V in both directions. An LED current of 2 mA is sufficient to trigger the component. For a continuous current of 5 A this results in a current-transfer-ratio of 2,500 to 1.

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Available abstract

Besides being used in the production of MOS transistors, the SIPMOS® (short for Siemens Power MOS) technology permits the manufacture of components in which bipolar and MOS structures are functionally integrated, e.g. an FET-controlled optotriac. This component consists of two inverse-parallel connected lateral thyristors which are driven with the aid of vertical MOS transistors. A highly sensitive phototransistor supplies the gate voltage of the vertical MOS transistors. The lateral thyristors are implemented by means of interlocking, finger-like structures which enable good chip utilization. The triac features a 4 × 4 mm2chip and has a blocking voltage of more than 600 V in both directions. An LED current of 2 mA is sufficient to trigger the component. For a continuous current of 5 A this results in a current-transfer-ratio of 2,500 to 1.

Key concepts: TRIAC, Thyristor, Electrical engineering, Transistor, Voltage, Chip, Optoelectronics, Component (thermodynamics)

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