Motion-control chip from STMicroelectronics silences automation systems

The fine motor skills of precision robots can advance further, with the STPIN820 IC, says STMicroelectronics.

The STPIN820 enables the next generations of stepper-motor-based robots to achieve even greater smoothness and silence, says STMicroelectronics, with smaller size, greater precision, and lower power consumption. Application areas are complex, space-saving advanced laboratory-automation systems which help medical centers cut clinical costs and accelerate turnaround times, and industrial robotics including 3D printing which can enhance accuracy and throughput by producing parts with complex shapes, quickly and accurately, for consumer and professional uses from prototyping to production.

The STSPIN820 is a dedicated stepper-motor driver with 256-microstep resolution. It operates from a supply voltage between 7.0 and 45V, simplifying design-in for a range of applications. The maximum output RMS current of 1.5A gives designers flexibility to meet various power and torque requirements, adds the company.

The STSPIN820 IC has high-speed inputs and a precise micro-stepping algorithm. It can turn a motor by a fraction of a degree to move a 3D printer’s head at a speed of more than 500mm/s, with submicron precision to create parts very quickly, or control extremely precise movements like sample loading, capping/decapping, and storage/retrieval in clinical automation systems. Other motor-driven medical equipment such as plate handlers, fluid pumps, blood analyers, and respirators can be quieter, more compact, and cost-effective, says STMicroelectronics.

Measuring just 4.0 x 4.0mm, and containing both the control intelligence and fully protected power components for driving the motor, the chip is claimed to be the world’s smallest all-in-one high-precision controller. Manufacturers of automation equipment can place the device on the controller circuit board, with minimal extra parts needed to complete the system, to save space and enhance system reliability, explains STMicroelectronics.

STSPIN820 delivers a superior combination of high performance and cost-effectiveness by leveraging ST’s proprietary Smart Power technology, which integrates motor-control logic featuring a high-precision micro-stepping algorithm with a low-RDS(ON) fully protected power stage in a single device. It provides familiar step-clock and direction-input pins thereby simplifying connection to a host processor or microcontroller.

In addition, a dedicated standby pin allows the device to be put in low-power mode to minimize consumption in energy-conscious applications.

Over-current, over-temperature, and short-circuit protection are also built in, allowing the device to withstand harsh industrial environments, and further helping to reduce circuit complexity, component count, and bill-of-materials costs.

The STSPIN820 is in production now, packaged as a 4.0 x 4.0mm QFN device. The associated STSPIN board (X-Nucleo-IHM14A1) will be showcased at the ST booth at SPS IPC Drives in Nuremberg, 28-30 November 2017.

Notes to Editors:

The STSPIN820 is a dedicated stepper-motor driver with 256-microstep resolution. It operates from a supply voltage between 7V and 45V, simplifying design-in for a wide range of applications. The maximum output RMS current of 1.5A gives designers flexibility to satisfy various power and torque requirements.

STSPIN820 delivers a superior combination of high performance and cost-effectiveness by leveraging ST’s new proprietary Smart Power technology, which integrates motor-control logic featuring a high-precision micro-stepping algorithm with a low-RDS(ON) fully protected power stage in a single device. It provides familiar step-clock and direction-input pins thereby simplifying connection to a host processor or microcontroller.

In addition, a dedicated Standby pin allows the device to be put in low-power mode to minimize consumption in energy-conscious applications.

Over-current, over-temperature, and short-circuit protection are also built in, allowing the device to withstand harsh industrial environments, and further helping to reduce circuit complexity, component count, and bill-of-materials costs.

http://www.st.com

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