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Motor drivers from ST eliminate need for over-specification

Posted: 23 Jun 2005 ?? ?Print Version ?Bookmark and Share

Keywords:stmicroelectronics? monolithic motor driver? motor driver? dc motor? stepper motor?

New monolithic motor driversSTMicroelectronics unveiled a family of monolithic motor drivers, including 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, L6225, L6206, L6226, L6207, L6227, L6208 and L6228 dual DC or bipolar stepper motors, and the L6235 and L6229 for brushless DC motors.

According to ST, this new 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 offeredthe L620x and L6235 devices are rated at 5.6A peak current (2.8ARMS), while the L622x devices are rated at 2.8A peak (1.4ARMS). Coupled with the wide (8V to 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, vending machines, office equipment and medical equipment.

The powerSPIN devices are built with the company'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.

All driver ICs 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.

Pricing ranges from $3 to $8.50 in quantities of 1,000 with example pricing of approximately $5.8 for the L205PD, $8 for the L6208PD, $3.30 for the L6225D and $4.55 for the L6228D.

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