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access icon free Monolithic H-bridge brushless DC vibration motor driver with a highly sensitive Hall sensor in 0.18 μm complementary metal-oxide semiconductor technology

  • Author(s): Yue Xu 1, 2 ; Hong-Bin Pan 1 ; Shu-Zhuan He 1 ; Li Li 1
    • View affiliations
    • Affiliations: 1: School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, People's Republic of China;
      2: College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, People's Republic of China
  • Source: Volume 7, Issue 4, July 2013, p. 204 – 210
    DOI:  10.1049/iet-cds.2012.0167 , Print ISSN 1751-858X, Online ISSN 1751-8598
© The Institution of Engineering and Technology
Received 14/06/2012, Accepted 13/12/2012, Revised 09/12/2012, Published

A monolithic low-voltage H-bridge brushless DC (BLDC) vibration motor driver with an integrated high sensitivity Hall sensor has been presented in 0.18 μm high-voltage complementary metal-oxide semiconductor technology. To improve the motor start-up reliability, a full-on start mode is applied to realise a high-speed start sequence by shortening the start-up time. Meanwhile, an active start function is activated to prevent dead point phenomenon if the motor magnet pole sensed by the built-in Hall sensor does not change during the motor starting. This complete one-chip solution for driving the BLDC vibration motors provides significantly enhanced reliabilities, including thermal shutdown and under voltage lockout protection functions, and fully eliminates the need for any external components. The measured results show that the motor driver chip has a typical operating point of 2 mT and a typical releasing point of − 2 mT, showing a hysteresis magnetic property of 4 mT. The chip is very robust. It can operate well within a low supply voltage range of 2–4 V and can output a maximum of 300 mA peak current while the ambient temperature ranges from − 40 to 85°C.

Inspec keywords: starting; CMOS integrated circuits; DC motor drives; brushless DC motors; electric sensing devices

Other keywords: voltage lockout protection functions; monolithic H-bridge brushless DC vibration motor driver; motor starting; active start function; high-speed start sequence; start-up time; motor start-up reliability; high-voltage CMOS technology; monolithic low-voltage H-bridge BLDC vibration motor driver; dead point phenomenon prevention; built-in Hall sensor; thermal shutdown; integrated high-sensitivity Hall sensor; one-chip solution; size 0.18 mum; voltage 2 V to 4 V; temperature -40 degC to 85 degC; hysteresis magnetic property; complementary metal-oxide semiconductor technology; motor driver chip; current 300 mA; full-on start mode; motor magnet pole

Subjects: d.c. machines; Drives; Sensing devices and transducers; CMOS integrated circuits; Small and special purpose electric machines

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