BLDC Motor Driver Boosts Battery Runtime In IoT/Portables

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bldc motor

A wide range of motors, especially brushless DC (BLDC) motors, are increasingly being used in battery-powered applications such as drones, educational robots, toothbrushes and Internet-of-Things (IoT) devices. Designers are opting for BLDC motors for its numerous advantages, such as small size, low weight & high efficiency. Despite these benefits, designers are looking to further enhance their designs in terms of size, battery life and features to stay ahead in the competitive market.

To overcome these key challenges, ST has launched STSPIN233, a tiny BLDC motor control chip for low-voltage, battery-powered, portable applications. ST claims it is the first low-voltage motor driver suitable for both single-shunt and three-shunt brushless-motor driving.

The new chip adds to the STSPIN motor control series for stepping, brush, or brushless motors in small battery-powered devices.

The STSPIN233 integrates a 200mΩ 1.3Arms power stage, in a slim and compact 3mm x 3mm package.

To extend operation from batteries, the chip boasts the industry’s lowest standby current, at less than 80nA. Moreover, it can be put into standby mode under logic control. Also, the chip’s input-voltage range of 1.8V-10V allows use with a power source as basic as a single Li-ion cell.

Built-in safety features further simplify system design, including over-current, short-circuit, and over-temperature protection, UVLO, and interlocking.

Development ecosystem for the STSPIN233 comprises a Nucleo expansion board (X-NUCLEO-IHM17M1) and related software tools (X-CUBE-SPN17 for STM32Cube).

The STSPIN233 is available now as a compact 3mm x 3mm QFN, priced from $0.95 for orders of 1000 pieces.

Features of the new BLDC motor at a glance:

  • Operating voltage from 1.8 to 10 V
  • Maximum output current 1.3 Arms
  • RDS(ON) HS + LS = 0.4 Ω typ.
  • Full protection set
    Non-dissipative overcurrent protection
    Short-circuit protection
    Thermal shutdown
  • Supporting three shunt sensing topology
    Direct driving, dedicated input and enable pin for each half-bridge
  • Energy saving and long battery life with standby consumption less than 80 nA
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Potential applications of the STSPIN233:

  • Drones and portable gimbals
  • Portable health care products
  • Low voltage electronic valves
  • Portable medical equipment
  • Toys
  • Robotics

For further information, visit www.st.com/stspin

Click here for Press release

 

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