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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Motor Drivers, Controllers

STMicroelectronics STSPIN948

Name: STSPIN948
Brand: STMicroelectronics
SKU: STSPIN948
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STSPIN948

Manufacturer:: STMicroelectronics

Category:: Motor Drivers, Controllers

Package:: 48-VFQFN Exposed Pad

Datasheet:: STSPIN948.pdf

Description:: SCALABLE 4.5 A DUAL FULL-BRIDGE

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STSPIN948 from STMicroelectronics is a 4.5 A dual full-bridge motor driver IC for brushed DC and bipolar stepper motors, operating up to 58 V with R_DS(ON) HS + LS = 0.36 Ω (typ), adjustable slew rate via external resistor, and integrated current-sense amplifiers with fixed 10× gain. It enables high-frequency PWM control in stage lighting and robotics motion systems.

For engineers reviewing the STSPIN948 datasheet, STSPIN948 pinout, STSPIN948 application, or STSPIN948 equivalent, key selection criteria include dual independent full-bridge operation mode, fixed OFF-time or PWM trimming current limiting, thermal shutdown at 150 °C, and dual open-drain fault outputs with UVLO protection on both VS and VDD supplies.

Technical Context

The STSPIN948 integrates two fully independent full-bridge power stages, each with dedicated current sensing (via SENSEA/SENSEB, REFA/REFB, VA/VB), programmable decay (slow/mixed), and configurable OFF-time (1–500 µs via TOFFA/TOFFB). Its charge pump (CP1/CP2, VBOOT, VSPUMP) sustains high-side NMOS drive up to 58 V.

Driving logic supports five modes selected by MODE1–MODE3, including dual independent full-bridge, parallel half-bridge, and mixed-decay full-bridge - all requiring static configuration (no runtime switching). Protection architecture includes per-bridge overcurrent detection (7–14 A threshold), thermal shutdown (150 °C, 30 °C hysteresis), and UVLO on VS (5.2 V turn-on) and VDD (2.7 V turn-on).

Key Specifications

Parameter	Value and Actual Design Meaning
Max Output Current	4.5 A RMS per bridge - supports continuous torque delivery in 24–48 V DC motor systems without external current amplification
Supply Voltage Range (VS)	5.2 V to 58 V - compatible with industrial 24 V and 48 V bus architectures, with derating above 75 °C ambient
R_DS(ON) (HS + LS)	0.36 Ω typ. - minimizes conduction loss at 4.5 A, enabling <1.5 W total dissipation per bridge at full load
Current Sense Gain	10× fixed (ACL = 9.5–10.5 V/V) - enables accurate shunt-based current measurement with ±0.5% gain error across temperature
Switching Frequency	Up to 500 kHz - supports high-resolution microstepping and fast transient response in closed-loop stepper control
Thermal Shutdown	150 °C with 30 °C hysteresis - prevents latch-up during overload; junction-to-board R_thJB = 11.9 °C/W enables PCB heatsinking
Standby Current	3 μA (VDD), 1 μA (VS) - allows ultra-low-power sleep in battery-backed motion controllers

Pinout & Package

STSPIN948 is housed in a thermally enhanced 48-pin HTSSOP package (EPAD exposed on bottom) with 0.5 mm pitch, optimized for high-current motor drive thermal management.

Pin/Terminal	Circuit Role	Design Meaning
nSTBY	Active-low standby input	Asserted low ≥600 µs disables charge pump and places all bridges in high-Z; wake-up requires t_WAKE + t_BOOT ≈ 180 µs
PWM1A / PWM1B	Half-bridge PWM control inputs	Directly gate-drive corresponding low-side MOSFETs; propagation delay ≤300 ns ensures precise duty-cycle fidelity
PHA / PHB	Phase control inputs	Determine high-side activation direction in full-bridge mode; define decay path (LS-on vs high-Z) in parallel half-bridge mode
EN/nFAULTA / EN/nFAULTB	Enable/fault open-drain outputs	Low-active enable for respective bridge; pulled low internally on overcurrent, overtemperature, or UVLO - provides system-level fault signaling
TOFFA / TOFFB	Fixed OFF-time adjustment inputs	Analog voltage inputs setting current limiter off-time from 1 µs to 500 µs using RC network - defines current regulation frequency
SR	Slew rate selection input	Resistor-connected analog input selecting output dv/dt: 0.3–2 V/ns - balances EMI reduction against switching loss
OUT1A–OUT2B (x2 per bridge)	Power output terminals	Paired pins per half-bridge (e.g., OUT1A/OUT2A) reduce trace inductance and current density - support >4 A RMS with proper PCB copper
LSS1A–LSS2B (x2 per bridge)	Low-side source return	Dedicated Kelvin sense returns for shunt resistors - isolate sense path from high-current return to minimize offset error
SENSEA / SENSEB	Current sense amplifier inputs	Accept differential voltage from external shunt; internal 10× gain enables 50 mV full-scale sensing at 4.5 A with 10 mΩ resistor
VBOOT / VSPUMP / CP1 / CP2	Charge pump supply & oscillator	Internal oscillator drives external flying capacitor (C_FLY) and bootstrap cap (C_BOOT = 1 µF) to sustain high-side gate drive above VS

Key Features

Feature	Design Value
Dual independent full-bridge topology	Enables simultaneous control of two separate motors or one 4-phase bipolar stepper - no shared timing or current-limit constraints
Programmable mixed/slow decay	Reduces audible noise and torque ripple in stepper applications by dynamically adjusting current decay path based on PHx state
Integrated 10× current sense amplifiers	Eliminates need for external op-amps; OFFSETA/OFFSETB pins shift output baseline by VDD/2 to accommodate bidirectional current sensing
Configurable slew rate (0.3–2 V/ns)	External R_SR sets dv/dt to meet CISPR-25 Class 5 EMI limits while maintaining <50 ns propagation matching between HS/LS paths
Per-bridge fault isolation	EN/nFAULTA and EN/nFAULTB operate independently - single-bridge failure does not disable the other, improving system robustness

Applications

Stage Lighting Pan/Tilt

Factory Automation Conveyors

Use Scenario: Precise, jitter-free positioning of gobo wheels and mirror assemblies under 24–48 V DC bus.

IC Role / Device Role / Timing Role: Dual full-bridge driver delivering synchronized 4.5 A peak current to two bipolar stepper coils with <50 ns inter-bridge timing skew.

Use Value: Enables sub-millisecond step response and <0.1° positional accuracy via mixed-decay current regulation and 500 kHz PWM resolution.

Use Scenario: Bidirectional speed-controlled DC motor drives for sorting belts and robotic transfer arms.

IC Role / Device Role / Timing Role: Dual independent full-bridge controlling two 24 V brushed DC motors with independent PWM1A/PH1A and PWM1B/PH1B timing.

Use Value: Delivers 4.5 A continuous per motor with integrated overcurrent shutdown - eliminates need for external current monitors in safety-critical zones.

ATM Cash Dispenser

Antenna Positioning Systems

Use Scenario: Reliable paper-handling actuation using compact bipolar stepper motors in space-constrained ATM chassis.

IC Role / Device Role / Timing Role: Parallel half-bridge mode (OUT1A+OUT2A, OUT1B+OUT2B) doubling current capability to 4.5 A per phase with reduced R_DS(ON) effective resistance.

Use Value: Achieves 0.18 Ω effective bridge resistance (half of 0.36 Ω) - cuts I²R loss by 50% and enables silent operation via adjustable slew rate.

Use Scenario: High-reliability azimuth/elevation tracking of satellite dishes and radar arrays in outdoor enclosures.

IC Role / Device Role / Timing Role: Dual full-bridge driving two 48 V brushed DC actuators with independent EN/nFAULTA/B fault reporting to central controller.

Use Value: Thermal shutdown at 150 °C and UVLO on 48 V bus ensure fail-safe stop during solar-heated enclosure operation - no external thermal sensor required.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TB9051FTG	Single full-bridge, 5.5 A peak, integrated current sense, but no dual-bridge independence or parallel mode	Requires two ICs for dual-motor control; lacks TOFFA/TOFFB programmability and mixed-decay option	Select when only one motor is needed and board space permits dual IC layout
DRV8876PWPR	Dual H-bridge, 3.6 A RMS, no integrated current amplifiers - external op-amp required for shunt sensing	Supports 45 V max, but lacks embedded 10× gain amps, fixed OFF-time tuning, and per-bridge fault outputs	Select when cost sensitivity outweighs integration benefits and external sensing is acceptable

Compared with TB9051FTG and DRV8876PWPR, STSPIN948 uniquely delivers dual independent full-bridge control with integrated 10× current amplifiers, programmable mixed decay, and per-bridge fault signaling - reducing BOM count and PCB area in multi-axis motion systems.

Availability

STSPIN948 is available at Aetrix Electronics and suitable for stage lighting, factory automation, and antenna positioning systems requiring stable component supply, long-term lifecycle support, and automotive-grade reliability validation.

Supply support for STSPIN948 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 analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

The STSPIN portfolio targets intelligent motor control applications, with STSPIN948 specifically engineered for high-current, high-voltage dual-axis motion systems requiring integrated protection, precision current regulation, and flexible decay control.

FAQ

What is the maximum allowable supply voltage for STSPIN948's VS pin?

The absolute maximum rating for VS is 62 V, but the recommended operating maximum is 58 V per DS14271 Rev 4. Operation above 58 V is only permitted under specific thermal conditions (Tj ≥ 75 °C and RH ≥ 60%) for limited durations, and sustained use beyond 58 V risks premature thermal shutdown or reliability degradation.

How does the STSPIN948 implement current limiting without external comparators?

STSPIN948 integrates two independent PWM current limiters: each compares amplified shunt voltage (VA or VB) against a user-set reference (REFA or REFB). When triggered, it forces a fixed OFF-time (1–500 µs set by TOFFA/TOFFB) or enters PWM trimming mode - all within the IC, eliminating need for external op-amps or comparators.

Can STSPIN948 drive unipolar stepper motors?

No - STSPIN948 is designed exclusively for brushed DC motors and bipolar stepper motors. Its dual full-bridge architecture provides complementary high-side/low-side drive per phase, which is incompatible with unipolar stepper wiring that requires center-tapped windings and single-ended switching.

What thermal interface practices maximize STSPIN948's power handling in HTSSOP package?

Maximize thermal performance by soldering the EPAD to a minimum 200 mm² copper pour connected to internal ground planes via ≥6 thermal vias (0.3 mm diameter, 0.8 mm pitch). Maintain ≥0.2 mm solder mask opening around EPAD, and avoid placing components directly above the exposed pad to preserve top-side cold plate contact.

STSPIN948 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 48-VFQFN Exposed Pad

Packaging:: Tray

Product Status:: Active

Motor Type - Stepper:: Bipolar

Motor Type - AC, DC:: Brushed DC

Function:: Driver - Fully Integrated, Control and Power Stage

Output Configuration:: Half Bridge (4)

Interface:: PWM

Technology:: Power MOSFET

Step Resolution:: -

Applications:: General Purpose

Current - Output:: 4.5A

Voltage - Supply:: 2.8V ~ 3.6V

Voltage - Load:: 5.2V ~ 58V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-VFQFPN (7x7)

STSPIN948 FAQ

1.How can I place an order for STSPIN948 through Aetrix?

Please submit a Request for Quotation (RFQ) for STSPIN948 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STSPIN948 reliable?

The price and inventory of STSPIN948 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STSPIN948 is usually 5 days.

3.What payment methods are accepted for STSPIN948?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STSPIN948 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STSPIN948?

STSPIN948 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STSPIN948 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STSPIN948?

For technical support, including STSPIN948 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STSPIN948 requirements.

6.How does Aetrix verify that STSPIN948 is sourced from the original manufacturer or authorized distributors?

All STSPIN948 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STSPIN948 meets industry standards.

7.What is the process for return or replacement of STSPIN948?

All STSPIN948 units undergo pre-shipment inspection (PSI). If there is an issue with STSPIN948, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STSPIN948 part is unused and in its original packaging.

Return procedure for STSPIN948:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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