Fully Integrated High Reliability Automotive Flasher IC

Abstract

The invention relates to an integrated circuit, in particular to a fully integrated high-reliability vehicle flasher integrated circuit, belonging to the technical field of vehicle flashers. According to the fully integrated high-reliability vehicle flasher integrated circuit provided by the invention, the integrated circuit comprises a pre-stage driving circuit and a post-stage driving circuit connected with the pre-stage driving circuit; the post-stage driving circuit comprises a third triode and a PMOS (Positive Channel Metal Oxide Semiconductor) tube; the third triode adopts a PNP tube; the base electrode end of the third triode is connected with the output end of a phase reverser inside the pre-stage driving circuit; the emitter electrode end of the third triode is connected with the power supply end of the integrated circuit; the collector electrode end of the third triode is connected with the grid electrode end of the PMOS tube; the source electrode end of the PMOS tube is connected with the power supply end; and the drain electrode end of the PMOS tube is connected with the output end of the integrated circuit. The integrated circuit is high in integration level, the volume is reduced, the reliability is strengthened, and the use cost is reduced.

Description

technical field [0001] The invention relates to an integrated circuit, in particular to a fully integrated high-reliability automotive flasher integrated circuit, which belongs to the technical field of automotive flashers. Background technique [0002] Such as figure 1 Shown; It is the structural block diagram of the existing integrated circuit of the flasher for the vehicle, wherein, the integrated circuit of the existing flasher for the vehicle adopts the bipolar process, the withstand voltage is not high, and the relay coil driven by it, when the power is turned on and the power is cut off With a high reverse peak voltage, the post-stage drive of the relay coil must add discrete components outside the integrated circuit. The discrete components use high-voltage NPN tubes, resulting in a larger system size; that is, the post-stage drive in the figure includes the first three The pole tube Q1, the first triode Q1 is an NPN tube, which is NPN1; the discrete component is a ...

AI Technical Summary

Problems solved by technology

[0002] like figure 1 Shown; It is the structural block diagram of the existing integrated circuit of the flasher for the vehicle, wherein, the integrated circuit of the existing flasher for the vehicle adopts the bipolar process, the withstand voltage is not high, and the relay coil driven by it, when the power is turned on and the power is cut off With a high reverse peak voltage, the post-stage drive of the relay coil must add discrete components outside the integrated circuit. The discrete components use high-voltage NPN tubes, resulting in a larger system size; that is, the post-stage drive in the figure includes the first three Pole tube Q1, the first triode Q1 adopts an NPN tube, which is NPN1; the discrete component is a second triode Q2, and the second triode Q2 also uses an NPN tube, which is NPN2

At the same time, the saturation pressure drop of the NPN tube is large, the power consumption is high, the operating temperature is high, and there are many components in the system, which all reduce the reliability of the system and the cost is high.

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