一种基于BCD工艺的汽车电压调节器芯片设计

doi:10.16180/j.cnki.issn1007-7820.2020.06.005

Abstract

Abstract:

Aiming at the problems of large volume, poor stability and short service life of automotive voltage regulator, a voltage regulator chip for automobile was proposed in this paper. In order to stabilize the output voltage of generator, the chip adjusted the average excitation current of the generator by using pulse-width modulation technology. Meanwhile, a low-temperature drift, high-precision voltage reference source and protection circuits were integrated in the chip. This chip was designed based on 0.5 μm BCD process and simulated by Cadence Spectre. The simulation results showed that the operate voltage range of chip was 720 V, the quiescent current of chip was 472 μA, the voltage regulation range was 1020 V, the reference voltage was 1.16 V, the operating temperature range was -40125 ℃, and the temperature coefficient of reference voltage was 8.4 ppm·℃ ^-1. In addition, when the voltage at the output of the generator fluctuated, the chip could stabilize the voltage.

Key words: pulse-width modulation, voltage regulator, reliability, under-voltage lockout, over temperature protection, BCD process

CLC Number:

TN492

YANG Renjing,WANG Yi,ZHANG Yugui,SHI Chuanfei. Design of a Automotive Voltage Regulator Chip Based on BCD Process[J].Electronic Science and Technology, 2020, 33(6): 24-28.

Figures/Tables 10

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Design of a Automotive Voltage Regulator Chip Based on BCD Process

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