Electronic Science and Technology ›› 2020, Vol. 33 ›› Issue (6): 24-28.doi: 10.16180/j.cnki.issn1007-7820.2020.06.005

Previous Articles     Next Articles

Design of a Automotive Voltage Regulator Chip Based on BCD Process

YANG Renjing1,WANG Yi2,ZHANG Yugui1,SHI Chuanfei1   

  1. 1. School of Big Data and Information Engineering,Guizhou University,Guiyang 550025,China
    2. School of Physics and Electronics Sciences,Guizhou Normal University,Guiyang 550001,China
  • Received:2019-04-17 Online:2020-06-15 Published:2020-06-18
  • Supported by:
    National Nature Science Foundation of China(61462015);Guizhou Provincial International Science and Technology Cooperation Project(GKWG[2014]7007)


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