STMicroelectronics STSPIN958

Overview

STSPIN958 from STMicroelectronics is a 5 A full-bridge motor driver IC for brushed DC motors, operating up to 58 V supply voltage with R_DS(ON) HS + LS = 0.33 Ω (typ), adjustable slew rate via external resistor, and integrated current-sense amplifiers with fixed 10× gain. It supports seven driving modes including dual half-bridge, single full-bridge, and parallel half-bridge configurations - deployed in stage lighting, robotics, and ATM mechanisms.

For engineers reviewing the STSPIN958 datasheet, STSPIN958 pinout, STSPIN958 application, or STSPIN958 equivalent, key selection considerations include its 5 A RMS output capability, configurable OFF-time current limiting (1–500 µs), mixed/slow decay control, thermal shutdown at 150 °C, and dual shunt-based current sensing with OFFSET-level shift functionality.

Technical Context

The STSPIN958 integrates two independent NMOS half-bridges with matched propagation delays (≤300 ns) and built-in dead-time to prevent shoot-through. Its charge pump (CP1/CP2 outputs) enables high-side gate drive up to 61.4 V, while VBOOT regulation ensures reliable operation across wide VS range (5.05–58 V).

Current control is implemented via two embedded op-amps (ACL = 10 ±5%) referenced to external shunt resistors and REF pin, supporting both fixed OFF-time (via ROFF/COFF network on TOFF) and PWM trimming modes. MODE1–MODE3 pins configure logic-driven driving topology without runtime reconfiguration.

Key Specifications

Pinout & Package

STSPIN958 uses a 32-pin HTSSOP package (7.0 × 7.0 mm, 0.65 mm pitch) with exposed thermal pad (EPAD) for low R_thJCbot = 4 °C/W. Pin functions are validated per DS14341 Rev 3 (pages 8–9).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar full-bridge motor driver applications.

Compared with TB6612FNG and DRV8876N, the STSPIN958 uniquely combines 58 V operation, 5 A RMS drive, 7 configurable topologies, and dual shunt-sense amplifiers - making it optimal for industrial motion systems demanding voltage scalability, torque precision, and layout-efficient current monitoring.

Availability

STSPIN958 is available at Aetrix Electronics and suitable for stage lighting, factory automation, and robotics applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp.

Supply support for STSPIN958 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, designing and manufacturing microcontrollers, power ICs, sensors, and analog devices for industrial, automotive, and consumer markets.

The STSPIN portfolio targets intelligent motor control, integrating protection, sensing, and flexible driving topologies into compact packages - specifically engineered for cost-sensitive, high-reliability motion systems in automation and smart equipment.

FAQ

What is the maximum PWM frequency supported by STSPIN958?

The STSPIN958 supports PWM frequencies up to 500 kHz under optimal slew rate and layout conditions. At higher frequencies, performance depends on selected slew rate (e.g., 2 V/ns enables full bandwidth), PCB parasitics, and bootstrap capacitor charging time (t_BOOT = 170 µs with C_BOOT = 1 µF). Operation above 200 kHz requires careful gate drive routing and low-inductance power paths.

How does the OFFSET pin affect current sensing accuracy?

The OFFSET pin shifts the amplifier output baseline by V_DD/2 when driven high, enabling bidirectional current measurement across the shunt resistor without negative supply rails. This allows accurate zero-center sensing for reversible motor current - critical for torque control in full-bridge mode - while maintaining compatibility with single-supply microcontroller ADCs.

Can STSPIN958 drive stepper motors?

No - STSPIN958 is designed exclusively for brushed DC motors and lacks the phase sequencing logic, microstepping control, or dual H-bridge interleaving required for bipolar stepper operation. It supports only unidirectional or bidirectional brushed DC loads via full-bridge, dual half-bridge, or parallel configurations. For stepper control, STMicroelectronics recommends STSPIN220 or STSPIN820.

What thermal management is required for continuous 5 A operation?

At 5 A RMS and 58 V, STSPIN958 dissipates ~8.25 W (I² × R_DS(ON)). With R_thJCbot = 4 °C/W and ambient ≤85 °C, a 2-layer PCB with ≥4 cm² exposed copper under EPAD and thermal vias is sufficient. No external heatsink is needed if board-level thermal resistance to ambient remains ≤25 °C/W - verified via IR imaging at steady state.