STMicroelectronics introduces STSPIN32G0A1 to its family of highly integrated system-in-package portfolios. The STSPIN32G0A1 provides a solution suitable for driving three-phase brushless motors using different driving modes, reducing the BOM and area significantly. It is composed of four part numbers, for full flexibility in balancing the resources among op-amp for current sensing, GPIOs, and specifically dedicated features like a precise reference for the ADC.

It embeds a triple half-bridge gate driver able to drive power MOSFETs with a current capability of 600 mA (sink and source). The high and low-side switches of the same half-bridge cannot be simultaneously driven high thanks to an integrated interlocking function. An internal DC-DC buck converter provides the 3.3 V voltage to supply the MCU and external components. An internal LDO linear regulator provides the supply voltage for gate drivers. The integrated operational amplifiers are available for the signal conditioning, for example, the current sensing across the shunt resistors. A comparator is integrated to perform the overcurrent protection. 

The integrated MCU (STM32G031x8) allows for performing field-oriented control, the 6-step sensorless, and other advanced driving algorithms including the speed control loop. It has the write-protection and read-protection features for the embedded flash memory to protect against unwanted writing and/or reading. The device also features overtemperature and undervoltage lockout protections and can be put into standby mode to reduce power consumption.

The device provides 23 general-purpose I/O ports (GPIO), one 12-bit analog-to-digital converter with up to 11 channels performing conversions in single-shot or scan modes, 5 synchronizable general-purpose timers, and supports an easy-to-use debugging serial interface (SWD). The embedded bootloader allows flash and option byte management through UART and I²C interfaces.

Key features of the STSPIN32G0A1

• Operating voltage from 6.7 to 45 V
• Three-phase gate drivers: 600 mA sink/source, Integrated bootstrap diodes, Cross-conduction prevention
• 32-bit ARM Cortex-M0+ core: Up to 64 MHz clock frequency, 8-KB SRAM with hardware parity check, 64-KB flash memory with protection and securable area
• 3.3. V DC-DC buck converter regulator with overcurrent, short-circuit, and thermal protection
• 12 V LDO linear regulator with thermal protection
• Up to 23 fast I/O ports (GPIO)
• 5-channel DMA controller with flexible mapping
• 12-bit ADC (up to 11 external channels) with 2.5 Msps conversion rate
• Advanced-control timer dedicated to motor control
• Up to 5 general purpose timers (1 x 32-bit + 4 x 16-bit)
• I²C, USART, and SPI interfaces
• Up to 3 rail-to-rail operation amplifiers for signal conditioning
• Comparator for overcurrent protection
• Standby mode for low power consumption
• UVLO protection on each power supply: VM, VDD, VREG, and VBOOTx
• On-chip debug support via SWD and embedded bootloader through UART and I²C
• Extended temperature range: -40 to +125 °C

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