STSPIN250 brushed DC motor driver meets portable, battery-powered IoT devices

STSPIN250 brushed DC motor driver meets portable, battery-powered IoT devices: STMicroelectronics has announced the STSPIN250 single-chip 2.6A driver for brushed DC motors. The STSPIN250 extends STMicroelectronics’ family of miniature, low-voltage, energy-efficient drivers for battery-powered portable and wearable applications.

 The STSPIN250 driver integrates a full power-MOSFET bridge and fixed off-time PWM current controller in a tiny 3.0 x 3.0mm package that saves space in portable equipment. The low on-resistance of the power stage (200mOhm total, high-side + low-side) and what STMicroelectronics claims is the best-in-the market current-sipping standby mode — below 80nA – to help maximise battery runtime and keep equipment-case temperatures down. Its supply-voltage range of 10 to 1.8V allows designers to specify a power source as small as a single Li-Ion cell.

Brushed DC motors offer a combination of performance, cost-effectiveness, and reliability, says STMicroelectronics. The STSPIN250’s high output-current capability allows use in low-to-medium-power applications such as portable printers, point of sale (PoS) terminals, consumer devices, electronic valves or door lockers, toys, and medical devices, ranging from electric toothbrushes to syringe pumps. It also has built-in protection features including under-voltage lock-out (UVLO), non-dissipative over-current protection, short-circuit protection, and thermal shutdown.

 The STSPIN250 joins the three monolithic, low-voltage drivers for portable and battery-powered applications that ST introduced last year (the STSPIN220 for stepper motors, the STSPIN230 for three-phase brushless motors, and STSPIN240 for brushed DC motors up to 1.3A).

 The STSPIN250A forms part of a complete ecosystem, ready to support fast and easy evaluation and prototyping. It comprises an STM32 Nucleo expansion board (X-NUCLEO-IHM13A1) and related software tools (X-CUBE-SPN13) that connect motor-control projects with the extensive STM32Cube MCU-development resources.

 The STSPIN250 is in production now in the 3.0 x 30mm VQFPN package.

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