New ASSPs support external microcontrollers

PHOENIX, Ariz. – September 26, 2008 - ON Semiconductor (Nasdaq: ONNN), a leading global supplier of high performance, energy efficient, silicon solutions has announced that the company has extended its bipolar stepper motor control family to include two new Serial Peripheral Interface (SPI) versions of a motor driver capable of peak currents up to 800 milliamp (mA) and for use with an external microcontroller for added flexibility. The AMIS-30511 and AMIS-30512 eliminate the need for many external components, reducing system cost and bill of materials (BOM).

Both of the new mixed-signal ICs contain two embedded H-bridges that can drive two-phase stepper motors with sustained peak currents up to 400mA and maximum currents up to 800mA for short duration. Each also allows a host microcontroller to detect blocked rotor and end-of-run conditions without additional switches, Hall sensors or optical encoders. In addition to stall detection, these functions allow the designer to program the microcontroller to calculate rotor position and to dynamically adjust current or speed as required to prevent step loss. This capability eliminates noise and vibration at end-stops and improves motion-control accuracy and reliability without additional components.

The 30512 contains a 5 volt regulator to supply both internal logic and up to 50mA for external components, such as a microprocessor. The 30512 also has watchdog logic circuitry to prevent an external microprocessor from “hanging up.”

“The AMIS-30511/512 devices extend our bipolar stepper motor micro-stepping driver family’s current drive range down to 400mA,” said Eric Wallentine, ON Semiconductor’s Industrial Product Marketing Manager. “By combining high-voltage analog circuitry and digital functionality on the same chip, these motor drivers let our customers design low cost, low component count motor driving systems for a wide variety of applications.”

Typical uses for the 30511/512 include security cameras, building and industrial automation, motor control, textile processing, process equipment, robotics, HVAC and base station control and status.

Pricing and Availability
Available in a 24 pin SOIC package, unit pricing in quantities of 1000 start at $5.30 for the AMIS-30511 and $5.85 for the AMIS-30512.

About ON Semiconductor
With its global logistics network and strong product portfolio, ON Semiconductor (NASDAQ: ONNN) is a preferred supplier of high performance, energy efficient, silicon solutions to customers in the power supply, automotive, communication, computer, consumer, medical, industrial, mobile phone, and military/aerospace markets. The company’s broad portfolio includes power, analog, DSP, mixed-signal, advance logic, clock management and standard component devices. Global corporate headquarters are located in Phoenix, Arizona. The company operates a network of manufacturing facilities, sales offices and design centers in key markets throughout North America, Europe, and the Asia Pacific regions. For more information, visit https://www.onsemi.com.

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ON Semiconductor and the ON Semiconductor logo are registered trademarks of Semiconductor Components Industries, LLC. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders. Although the company references its Web site in this news release, such information on the Web site is not to be incorporated herein.

About onsemi

onsemi (Nasdaq: ON) is driving disruptive innovations to help build a better future. With a focus on automotive and industrial end-markets, the company is accelerating change in megatrends such as vehicle electrification and safety, sustainable energy grids, industrial automation, and 5G and cloud infrastructure. With a highly differentiated and innovative product portfolio, onsemi creates intelligent power and sensing technologies that solve the world’s most complex challenges and leads the way in creating a safer, cleaner, and smarter world.

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onsemi and the onsemi logo are trademarks of Semiconductor Components Industries, LLC. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders. Although the Company references its website in this news release, information on the website is not to be incorporated herein.

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