STMicroelectronics Adds STSPIN32 Motor Controller to Save Space, Time and Material Costs

By STMicroelectronics

On May 7, 2019, STMicroelectronics STSPIN32 programmable motor controller / driver product family added a cost-effective phase current single Shut detection motor control chip - STSPIN32F0B SiP (system-in-package). This ideal all-in-one new motor controller meets the growing demand for battery-powered tools.

By integrating a current sense op amp, the STSPIN32F0B saves three independent coil current sense resistors in three-phase BLDC motor control, providing more I/O ports for user functions. The new driver features a 48MHz STM32F031x6* microcontroller (MCU) capable of running 6-step motor control algorithms and application-level functions.

The STSPIN32F0B has 20 GPIO pins that allow developers to use the internal functions of the MCU, including up to five general-purpose timers, a 12-bit ADC, and a temperature sensor. The MCU also provides the user with I2C, UART and SPI ports.

The STSPIN32F0B SiP includes a three-channel half-bridge driver that can deliver up to 600mA per channel to the external MOSFET to power the motor. In addition, the new product integrates a 3.3V DC/DC buck converter and a 12V low dropout (LDO) regulator to power the MCU, gate drivers and external components, further reducing bill of materials costs and improving overall system efficiency.

Other integrated features include a bootstrap diode and a protection mechanism. The bootstrap diode provides a safe and reliable startup voltage for the switching power supply. In industrial applications where the operating conditions are harsh, the protection mechanism ensures stable operation of the motor. Protection features include real-time programmable overcurrent protection, cross conduction/through-through protection, undervoltage lockout (UVLO) to protect all power supplies, and overtemperature protection.

To simplify the development of STSPIN32-based applications, ST offers developers a complete set of hardware, software and firmware tools, including a range of ready-to-use 6-step motor control algorithms for sensorized or sensorless BLDC motor control. In addition, users are allowed to enter the STM32 Bootloader mode, which facilitates wireless (OTA) update of firmware, increases system upgrade flexibility, and lowers total cost of ownership.

The STSPIN32F0B extends the supply voltage range from 45V to 6.7V and is suitable for a wide range of products, including two lithium polymer (LiPo) battery powered portable devices. To save power when the motor is idle, the standby mode maximizes battery life and shuts down all circuits except the DC-DC converter that supplies the MCU.

The STSPIN32F0B is available now in volume production in a 7mm x 7mm compact QFN package. The product will be on display at the ST booth (Exhibition Hall 9/429) at PCIM Europe in Germany from May 7th to 9th, 2019.

* STM32 is a registered and/or unregistered trademark of STMicroelectronics International NV or its affiliates in the European Union and/or other jurisdictions. In particular, STM32 is registered with the US Patent and Trademark Office.

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