09 Jun 2005 | Geneva

Motor Driver Platform from STMicroelectronics Simplifies Motion Control Applications

Geneva / 09 Jun 2005

Geneva, June 9, 2005 - STMicroelectronics (NYSE: STM) has introduced a family of monolithic motor drivers that form the heart of an open, scalable solution for a wide range of motion control applications. Leveraging ST’s long-standing leadership in smart power products and technologies, the new powerSPIN platform includes devices suitable for driving DC motors, stepper motors and brushless DC motors, along with a comprehensive support package including evaluation boards, PC software and detailed application notes. This range of smart motor drivers includes the L6205 and L6225, L6206 and L6226, L6207 and L6227, L6208 and L6228 dual DC or bipolar stepper motors and the L6235 and L6229 for brushless DC motors.

The powerSPIN devices are built with ST’s BCDIII process which combines bipolar, CMOS and isolated DMOS structures on the same chip to provide a robust and proven 60V mixed signal smart power technology. This allows all of the control and power circuitry required to drive the motor to be integrated in a single chip. The high level of integration reduces part count, while the inclusion of protection and diagnostic circuitry results in devices that are robust, reliable and easy to use.

For example, the L6208 integrates all the circuitry required to drive a two-phase stepper motor, including stepper motor including a dual DMOS full bridge, the constant off-time PWM current controller that performs the chopping regulation, and the phase sequence generator that generates the stepping sequence. Similarly, for driving three-phase brushless DC motors, the L6235 integrates a three-phase DMOS bridge, a constant off-time PWM current controller and the decoding logic for single-ended Hall sensors that generates the required sequence for the power stage. Both devices feature non-dissipative over-current protection on the high side Power MOSFETs and thermal shutdown.

The powerSPIN platform is designed to allow optimal matching between the selected device and the application requirements, eliminating the need for expensive over-specification. Two classes of pin-to-pin compatible powerSPIN devices with different current ratings are offered: the L620x devices and the L6235 are rated at 5.6A peak current (2.8ARMS), while the L622x devices are rated at 2.8A peak, 1.4ARMS)). Devices can also be easily connected in parallel to double peak and RMS ratings. Coupled with the wide (8-52V) operating voltage range and a variety of package options including PowerDIP24, PowerSO36 and SO24, this allows the powerSPIN platform to address a wide range of motor control requirements in factory automation (pick & place/X-Y positioning), vending machines (money dispensers, food dispensers), office equipment (printers, copiers, scanners) and medical equipment.

The devices are supported by an evaluation environment, called practiSPIN, which comprises boards and a software tool that provides an interface between a PC and the motor driver, as well as performing power dissipation and thermal analysis simulation.

Further information is available at www.st.com/powerspin

About STMicroelectronics

STMicroelectronics is a global leader in developing and delivering semiconductor solutions across the spectrum of microelectronics applications. An unrivalled combination of silicon and system expertise, manufacturing strength, Intellectual Property (IP) portfolio and strategic partners positions the Company at the forefront of System-on-Chip (SoC) technology and its products play a key role in enabling today's convergence markets. The Company's shares are traded on the New York Stock Exchange, on Euronext Paris and on the Milan Stock Exchange. In 2004, the Company's net revenues were $8.76 billion and net earnings were $601 million. Further information on ST can be found at www.st.com.