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STMicroelectronics SPMD150STP

Name: SPMD150STP
Brand: STMicroelectronics
SKU: SPMD150STP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SPMD150STP

Manufacturer:: STMicroelectronics

Category:: Motor Driver Boards, Modules

Package:

Datasheet:: SPMD150STP.pdf

Description:: STEPPER DRIVER 1.5A 10-42V LOAD

Quantity:: RFQ Add To RFQ list

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Inventory:3,669

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Product details

Overview

SPMD150STP from STMicroelectronics is a fully integrated, metallic-cased stepper motor driver module for two-phase bipolar stepper motors, delivering 1.5 A average phase current at up to 42 V supply, supporting full/half-step and microstepping via TTL/CMOS logic interface and programmable current decay modes - deployed in industrial CNC positioning stages requiring robust, heatsink-free motion control.

For engineers reviewing the SPMD150STP datasheet, SPMD150STP pinout, SPMD150STP application, or SPMD150STP equivalent, key selection considerations include its chopper-controlled PWM current regulation, non-dissipative overcurrent protection, dual independent bridge timing (16 µs off-time), sealed metal package (50.8 × 50.8 × 14.7 mm), and -40°C to +85°C operating range.

Technical Context

The SPMD150STP integrates two independent MOSFET full-bridge power stages with intrinsic freewheeling diodes and 1 µs dead-time control to prevent cross-conduction. Each bridge features a constant off-time PWM current controller sensing phase current via external sense resistors, with reference inputs (VREFA/VREFB) scaling output current per I_OUT = V_REFx/0.192 A.

Logic-level inputs (CLOCK, CW/CCW, HALF/FULL, CONTROL, RESET, EN) interface directly to 3.3 V or 5 V microcontrollers, with internal pull-up/pull-down networks and open-collector–compatible EN pin. Decay mode (fast/slow) and stepping sequence (full/half/micro) are digitally selected, while thermal shutdown triggers at 165 °C junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage (VS)	10–42 V DC - supports wide-range industrial DC bus supplies without external regulation.
Output Current (Avg)	±1.5 A per phase - sufficient for NEMA 17–23 stepper motors in closed-loop positioning systems.
Current Sensing Ref	VREF = 1.225 V ±1.2% - stable internal reference enabling precise current setting via external resistor divider or DAC.
Off-Time Setting	16 µs typical (RCA/RCB) - fixed internal RC network allows predictable chopper frequency and current ripple control.
Logic Compatibility	TTL/CMOS - direct interfacing with STM32, PIC, or Arduino GPIO without level-shifting circuitry.
Thermal Shutdown	165 °C junction - autonomous protection preserving motor and driver integrity during stall or overload.
Operating Temp	-40°C to +85°C case - validated for embedded motion control in unventilated enclosures.

Pinout & Package

SPMD150STP uses a custom 19-pin through-hole metallic module package (50.8 × 50.8 × 14.7 mm), sealed and molded for IP65-equivalent environmental resilience. The metal case serves as thermal path and EMI shield, eliminating need for external heatsink or forced airflow.

Pin/Terminal	Circuit Role	Design Meaning
1 VSS	Logic supply input	Accepts 3.3 V or 5 V - powers internal logic and interfaces; internal 10 kΩ pull-ups referenced here.
2 REF	Reference voltage output	1.225 V ±1.2% - used to set phase current via external resistor dividers on VREFA/VREFB.
3 RESET	State machine reset	Active-low synchronous reset to home state (State 1); internal 10 kΩ pull-up ensures safe default.
4 CLOCK	Step command input	Rising-edge triggered - advances phase sequencer; min. 1 µs high/low pulse width required.
5 CW/CCW	Direction control	High = clockwise rotation (per winding polarity); internal 10 kΩ pull-up prevents floating state.
6 VREFA	Phase A/B current reference	Sets max current for Bridge A/B: I_OUT = V_REF/0.192 A; internal 100 kΩ pull-down + 470 pF filter.
7 RCA	Bridge A off-time set	Configures PWM off-time (default 16 µs); parallel R/C adjusts timing for current ripple optimization.
8 EN	Module enable	Active-high; open-collector recommended - disables outputs to high-Z for manual motor positioning.
9 CONTROL	Decay mode select	High = slow decay (lower power loss); Low = fast decay (higher torque at speed); internal 10 kΩ pull-up.
10 HALF/FULL	Stepping mode select	High = half-step (8 states/rev); Low = full-step (4 states/rev); determines excitation pattern sequence.
11 VREFB	Phase C/D current reference	Independent current setting for Bridge C/D - enables true microstepping with variable current profiles.
12 RCB	Bridge C/D off-time set	Dual independent timing control - allows asymmetric off-times for optimized torque/speed trade-offs.
13 GND1	Logic ground	Return path for VSS, REF, and all logic signals - isolated from power ground to reduce noise coupling.
14 GND2	Power ground	Return path for VS and motor phase currents - separate plane minimizes switching noise in logic domain.
15 PHD	Phase D output	H-bridge output terminal for bipolar stepper winding D - rated for ±1.5 A continuous, 2.5 A peak.
16 PHC	Phase C output	H-bridge output terminal for bipolar stepper winding C - complements PHD in dual-bridge configuration.
17 PHB	Phase B output	H-bridge output terminal for bipolar stepper winding B - paired with PHA for two-phase drive.
18 PHA	Phase A output	H-bridge output terminal for bipolar stepper winding A - primary excitation pair with PHB.
19 VS	Power stage supply	10–42 V input for motor and H-bridges - absolute max 50 V; requires local bulk capacitance per layout guidelines.

Key Features

Feature	Design Value
Non-dissipative overcurrent protection	Internally limits phase current to 4–7.1 A during short-circuit events without external shunt or power loss.
Programmable current decay mode	Selectable fast/slow decay via CONTROL pin - balances torque retention, power dissipation, and acoustic noise.
Dual independent PWM controllers	Separate VREFA/VREFB and RCA/RCB pins enable true microstepping with independent current profiling per phase pair.
Metallic sealed enclosure	50.8 × 50.8 × 14.7 mm hermetically molded case - operates at full rating without heatsink or fan in -40°C to +85°C ambient.
Remote shutdown & thermal protection	EN pin enables safe motor coasting; junction shutdown at 165 °C prevents irreversible damage under sustained overload.

Applications

Industrial CNC Positioning

Automated Laboratory Equipment

Use Scenario: Precision X-Y table movement in benchtop milling and engraving systems with real-time step command streaming.

IC Role / Device Role / Timing Role: Dual-H-bridge stepper driver executing full/half-step sequences synchronized to microcontroller CLOCK pulses with sub-millisecond timing fidelity.

Use Value: 1.5 A continuous current and 42 V headroom enable high-torque, low-vibration motion at speeds up to 50 kHz step rate without external current amplification.

Use Scenario: Reagent dispensing arm in automated ELISA analyzers requiring repeatable 0.1° angular resolution and silent operation.

IC Role / Device Role / Timing Role: Microstepping controller using variable VREFA/VREFB inputs from MCU DAC to generate sinusoidal current profiles across two phase pairs.

Use Value: Independent bridge timing (RCA/RCB) and decay control suppress resonance and audible noise while maintaining position accuracy within ±0.05°.

Medical Imaging Stage Control

Factory Automation Indexers

Use Scenario: CT gantry collimator alignment and PET detector calibration stages exposed to EMI-rich radiology environments.

IC Role / Device Role / Timing Role: EMI-hardened motion controller with metallic shielding, isolated logic/power grounds (GND1/GND2), and non-dissipative fault protection.

Use Value: Sealed metal package and thermal shutdown ensure uninterrupted operation during multi-hour imaging sessions without derating.

Use Scenario: Rotary indexing table in packaging line with frequent start/stop cycles and ambient temperatures up to 75°C.

IC Role / Device Role / Timing Role: Robust stepper interface accepting 24 V logic-compatible signals and driving NEMA 23 motors directly from PLC step/direction outputs.

Use Value: TTL/CMOS compatibility, -40°C to +85°C rating, and remote EN shutdown allow integration into legacy control cabinets without signal conditioning.

Availability

SPMD150STP is available at Aetrix Electronics and suitable for industrial CNC positioning, automated laboratory equipment, medical imaging stage control, and factory automation indexers requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for SPMD150STP 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, mixed-signal, power, and microcontroller solutions for industrial, automotive, and consumer applications.

The SPMD150STP belongs to ST's motion control module family, engineered specifically for plug-and-play stepper motor actuation in space-constrained, thermally demanding industrial environments - emphasizing reliability, integration, and immunity to harsh electrical conditions.

FAQ

What is the maximum motor supply voltage supported by SPMD150STP?

The SPMD150STP supports a DC motor supply voltage (VS) from 10 V to 42 V, with an absolute maximum rating of 50 V. Operation above 42 V risks exceeding safe operating area limits and triggering overvoltage protection. Designers must use appropriate bulk capacitance and transient suppression on the VS rail per ST Application Note AN2822.

How is microstepping implemented on SPMD150STP?

Microstepping is achieved by independently modulating VREFA and VREFB with time-varying reference voltages (e.g., from MCU DAC outputs), while synchronizing CLOCK pulses. The internal PWM controllers adjust phase current magnitude per bridge, generating interpolated current waveforms between full-step positions - enabling up to 1/16 microstepping resolution depending on external control precision.

Does SPMD150STP require an external heat sink?

No. The SPMD150STP's metallic case is thermally optimized to dissipate heat directly into ambient air, allowing full 1.5 A operation from -40°C to +85°C case temperature without external heatsink or forced airflow. Thermal performance validation is documented in Section 4.7 of datasheet Doc ID 17160 Rev 1, including derating curves.

Can SPMD150STP drive unipolar stepper motors?

No. The SPMD150STP is designed exclusively for two-phase bipolar stepper motors with center-tapped or four-lead windings. Its dual full-bridge topology requires bidirectional current flow in each phase; unipolar motors lack the necessary winding configuration and would not achieve proper commutation or torque generation.

SPMD150STP Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: EASY POWER™

Packaging:: Box

Product Status:: Obsolete

Type:: Module

Motor Type:: Stepper

Control / Drive Type:: Stepper, Bipolar

Number of Motors:: 1

Voltage - Load:: 10 ~ 42V

Current - Output:: 1.5A

Wattage - Load:: -

Voltage - Supply:: 3 ~ 5.25VDC

Interface:: Step / Direction

Mounting Type:: Through Hole

Operating Temperature:: -40°C ~ 85°C

Features:: -

For Use With/Related Products:: -

SPMD150STP FAQ

1.How can I place an order for SPMD150STP through Aetrix?

Please submit a Request for Quotation (RFQ) for SPMD150STP 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 SPMD150STP reliable?

The price and inventory of SPMD150STP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SPMD150STP is usually 5 days.

3.What payment methods are accepted for SPMD150STP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SPMD150STP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SPMD150STP?

SPMD150STP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SPMD150STP 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 SPMD150STP?

For technical support, including SPMD150STP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SPMD150STP requirements.

6.How does Aetrix verify that SPMD150STP is sourced from the original manufacturer or authorized distributors?

All SPMD150STP 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 SPMD150STP meets industry standards.

7.What is the process for return or replacement of SPMD150STP?

All SPMD150STP units undergo pre-shipment inspection (PSI). If there is an issue with SPMD150STP, 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 SPMD150STP part is unused and in its original packaging.

Return procedure for SPMD150STP:

1.Submit a request within 90 days.

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

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