STMicroelectronics STSPIN32G4

Overview

STSPIN32G4 from STMicroelectronics is a highly integrated 3-phase BLDC motor controller combining a triple half-bridge gate driver (1 A sink/source) and an STM32G431VBx3 ARM® Cortex®-M4 MCU (170 MHz, 128 kB Flash, 32 kB SRAM) in a single QFN64 package. It supports sensorless/sensored FOC, six-step commutation, and dual-motor control via external drivers, with embedded VDS monitoring, cross-conduction prevention, and programmable 8–15 V buck regulator for gate drive supply.

For engineers reviewing the STSPIN32G4 datasheet, STSPIN32G4 pinout, STSPIN32G4 application, or STSPIN32G4 equivalent, this device delivers verified motor control performance across industrial automation, e-bikes, robotics, and power tools - with confirmed I²C-accessible configuration registers, hardware-based short-circuit protection, and full SWD/JTAG debug support.

Technical Context

The STSPIN32G4 integrates a dedicated gate driver IC with hardware interlocking, VDS monitoring (threshold set via SCREF pin), and embedded bootstrap diodes - enabling robust MOSFET switching up to 75 V VM with 150 ns minimum deadtime. Its STM32G431 MCU includes two 16-bit advanced timers with 6 PWM channels, CORDIC accelerator for real-time trigonometric computation, and four rail-to-rail comparators for fast current sensing.

Power management combines a programmable 500 kHz buck converter (200 mA, 8/10/12/15 V output), a 3.3 V LDO (150 mA), and a 15 µA standby regulator - all self-supplied from VM. Protection features include thermal shutdown (140–160 °C), UVLO on VCC/VREG3V3, and hardware-enforced fault response with nFAULT assertion and READY/WAKE signaling.

Key Specifications

Pinout & Package

STSPIN32G4 uses a thermally enhanced 64-pin QFN package (9 mm × 9 mm, 0.5 mm pitch) with exposed EPAD for PCB heat dissipation. Pin functions are validated per DS13630 Rev 3 (pages 10–12), including dedicated gate driver outputs (GHS1/GLS1–GHS3/GLS3), bootstrap supplies (BOOT1–BOOT3), motor phase outputs (OUT1–OUT3), and full STM32G431 GPIO mapping.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-phase BLDC motor control applications.

Compared with STSPIN32F0 and DRV8323RS, the STSPIN32G4 uniquely integrates a full-featured MCU, programmable power management, and hardware VDS protection - delivering complete motor control in one package without compromising on configurability or safety compliance.

Availability

STSPIN32G4 is available at Aetrix Electronics and suitable for industrial servo drives, e-bike motor controllers, and home cleaning robot platforms requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for STSPIN32G4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in microcontrollers, power management, and motor control solutions for industrial, automotive, and consumer markets.

The STSPIN32G4 belongs to ST's STSPIN family of intelligent motor drivers - designed specifically to reduce system complexity and accelerate development of compact, high-efficiency BLDC motor control systems.

FAQ

What is the maximum motor supply voltage supported by STSPIN32G4?

The STSPIN32G4 supports a motor supply voltage (VM) from 5.5 V to 75 V, with absolute maximum rating of 78 V. Operation above 75 V is not recommended due to UVLO and thermal constraints defined in Table 2 of DS13630 Rev 3. The device includes built-in UVLO protection that disables gate drivers if VM drops below 3 V (buck enable threshold) or rises beyond safe operating limits.

Does STSPIN32G4 support sensorless FOC, and what peripherals enable it?

Yes, STSPIN32G4 fully supports sensorless Field-Oriented Control using its integrated STM32G431 MCU. Key enabling peripherals include two 12-bit ADCs (4 Msps), four ultra-fast comparators for zero-crossing detection, three operational amplifiers (configurable as PGAs), and the CORDIC hardware accelerator for real-time Clarke/Park transforms - all accessible via standard HAL/LL drivers and ST's Motor Control SDK.

How is VDS monitoring configured, and what happens during a fault?

VDS monitoring threshold is set by applying a voltage (0.2–2.5 V) to the SCREF pin; corresponding overvoltage trip points range from 0.1 V to 2.8 V. When VDS exceeds the threshold, the gate driver outputs disable within nanoseconds, nFAULT asserts low, and READY deasserts. Recovery requires clearing the fault condition and waiting ≥160 µs for internal deglitch filtering before automatic restart.

Can STSPIN32G4 drive two independent BLDC motors simultaneously?

Yes - the embedded STM32G431 MCU has sufficient timers, PWM channels, and GPIOs to manage two independent FOC loops. For second motor power stage, ST recommends pairing with STDRIVE101 (3-phase gate driver). This configuration avoids duplicate MCUs and reduces total BOM cost and PCB footprint versus discrete dual-controller solutions.