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

STMicroelectronics L9935013TR

Name: L9935013TR
Brand: STMicroelectronics
SKU: L9935013TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L9935013TR

Manufacturer:: STMicroelectronics

Category:: Motor Drivers, Controllers

Package:: 20-SOIC (0.433", 11.00mm Width) Exposed Pad

Datasheet:: L9935013TR.pdf

Description:: IC MTR DRV BIPOLAR 8-24V 20PWRSO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

L9935013TR from STMicroelectronics is a two-phase bipolar stepper motor driver IC with dual 1.1 A full-bridge outputs, integrated chopping current regulation, SPI serial interface, and comprehensive protection (short-circuit, open-load, over-temperature pre-alarm). It operates up to 24 V supply voltage, delivers standby current as low as 40 µA, and is designed for precision motion control in industrial automation and embedded positioning systems.

For engineers reviewing the L9935013TR datasheet, L9935013TR pinout, L9935013TR application, or L9935013TR equivalent, this device supports full/half-step modes, offers programmable current limits via external sense resistors (e.g., 0.33 Ω), provides error-flag diagnostics for system-level fault handling, and enables synchronized multi-driver cascading via external oscillator clocking.

Technical Context

The L9935013TR implements two independent full-bridge drivers (OUTA1/OUTA2 and OUTB1/OUTB2) with internal DMOS power transistors, each supporting ±1.2 A DC output and ±2.5 A peak current. Chopper regulation uses offset-phase PWM with user-selectable current thresholds (900 mA, 550 mA, 60 mA, or 0 mA) set by SPI-configurable bits 1–5.

Protection logic includes short-to-VS detection (triggered within 2–5 µs at 1.5× nominal current), open-load diagnosis, thermal pre-alarm at 130–160 °C, and hard shutdown at 160–200 °C. The SPI interface (SCK/SDI/SDO/CSN) operates with 5 V logic (VCC), supports daisy-chaining, and resets error flags on CSN rising edge.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	±1.1 A continuous per bridge; enables driving NEMA 17–23 bipolar stepper motors without external heatsinking under typical 24 V, 100% duty cycle conditions.
Supply Voltage Range	8–24 V DC (typical operating); supports industrial 24 V rail systems while tolerating transient spikes up to 40 V for <400 ms.
Standby Current	40 µA typical; allows ultra-low-power hold mode during motor idle states in battery-backed or energy-sensitive applications.
Current Regulation	Chopper-based PWM with four selectable levels (0/60/550/900 mA typ.) via SPI bits; eliminates need for external current-sense amplifiers or analog DACs.
Thermal Protection	Pre-alarm at 130–160 °C and shutdown at 160–200 °C; provides fail-safe motor stop before junction damage, with 10–30 K hysteresis margin.
SPI Interface	4-wire synchronous protocol (SCK/SDI/SDO/CSN); enables microcontroller-based real-time torque/speed control and diagnostic readback without parallel bus overhead.
EMI Reduction	Controlled output voltage slopes (tr/tf = 0.3–1.5 µs) and offset-phase chopper operation cut supply current ripple by 50%, easing EMC compliance.

Pinout & Package

Package: PowerSO-20 (20-pin exposed-pad surface-mount package with integrated heat slug; R_thj-case = 5 °C/W, R_thj-amb = 35 °C/W on standard FR4).

Pin/Terminal	Circuit Role	Design Meaning
1,10,11,20	GND	Common ground reference for logic, power, and current sensing; all internally connected to metal frame for low-impedance thermal and EMI path.
2,9,13,18	OUTA1/OUTB1/OUTB2/OUTA2	Full-bridge output terminals; drive stepper coil ends A+, B+, B−, A− respectively; rated for ±1.2 A DC and ±2.5 A peak.
3,4,5,7	SCK/SDI/SDO/CSN	SPI serial interface signals; support daisy-chained configuration and error-flag readback; CMOS-compatible 5 V logic levels.
6	VCC	5 V logic supply; powers internal state machine and SPI interface; decoupling required near pin for noise immunity.
8	EN	Active-low enable; disables both bridges and reduces quiescent current to 40 µA; hysteresis ensures noise-immune wake-up.
12,19	SRB/SRA	Current sense resistor connections; set chopper threshold for Bridge B and A respectively; compatible with 0.33 Ω standard value.
14	CDRV	Charge pump buffer capacitor node; stabilizes internal high-side gate drive voltage for reliable 100% duty cycle operation.
15	OSC	Oscillator timing node; accepts 1 nF capacitor for 20–31 kHz internal clock or external square wave for multi-device synchronization.
16	VS	Main motor supply input; accepts 8–24 V DC; handles peak currents up to 2 A; requires low-ESR bulk capacitance nearby.
17	NC	No connect; electrically isolated; must remain unconnected to avoid parasitic coupling or thermal interference.

Key Features

Feature	Design Value
Offset-phase chopper control	Reduces total supply current ripple by 50% versus single-phase PWM, lowering conducted EMI and easing filter design.
Programmable current limit (4 levels)	Enables torque scaling across motor loads without hardware change-e.g., 900 mA for holding, 60 mA for microstepping idle.
Short-to-VS detection (2–5 µs response)	Identifies wiring faults before catastrophic failure; triggers error flag and forces sink transistor off after 8 detections.
Thermal pre-alarm + shutdown	Provides early warning (130–160 °C) and hard cutoff (160–200 °C) with 10–30 K safety margin for robust thermal management.
SPI-based diagnostics	Reads real-time error status (overload, open load, over temp) and clears flags via CSN rising edge-no additional GPIO needed.

Applications

Industrial CNC Positioning

Automated Test Equipment (ATE)

Use Scenario: Precision X-Y table movement in PCB drilling and component placement machines.

IC Role / Device Role / Timing Role: Dual full-bridge driver executing full/half-step sequences under MCU SPI command; regulates coil current to maintain torque across speed range.

Use Value: Integrated chopping and thermal protection eliminate external current-sense ICs and discrete thermal sensors, reducing BOM count by 3+ components.

Use Scenario: Actuator control in semiconductor wafer probers and optical alignment stages.

IC Role / Device Role / Timing Role: Stepper driver receiving position commands via SPI; uses error-flag feedback to halt motion on open-load (broken belt) or over-temp (jam).

Use Value: 40 µA standby current enables low-power sleep mode between test cycles, extending uptime in fanless ATE enclosures.

Medical Infusion Pumps

Smart Home HVAC Dampers

Use Scenario: Peristaltic pump actuation requiring precise, repeatable fluid dosing with safety-critical fault reporting.

IC Role / Device Role / Timing Role: Bipolar stepper controller enforcing current-limited microstepping; reports short-to-VS or open-load via SPI to host MCU for alarm logging.

Use Value: Short-to-VS detection within 5 µs prevents coil burnout during connector disconnection-meeting IEC 62304 Class C software safety requirements.

Use Scenario: Motorized air damper positioning in ducted mini-split HVAC systems with space-constrained PCB layout.

IC Role / Device Role / Timing Role: Compact stepper driver using PowerSO-20's exposed pad for passive cooling; controlled via low-pin-count SPI from HVAC SoC.

Use Value: Controlled output slew rates (0.3–1.5 µs) meet CISPR-22 Class B radiated emissions limits without added ferrite beads or shielding.

Equivalent & Alternatives

The following parts are listed as comparable options for similar two-phase stepper motor driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TB6600HG	Higher 4.5 A output rating but no integrated current sense resistors; requires external sense amps and discrete protection circuitry.	Better suited for high-torque NEMA 34 motors; lacks SPI diagnostics and thermal pre-alarm-requires MCU firmware for fault interpretation.	Select when peak current >2 A is mandatory and board space permits added discretes; not drop-in due to different pinout and control interface.
DRV8825	Microstepping up to 1/32 step but only 2.2 A max; uses analog VREF for current setting instead of SPI-programmable levels.	Ideal for low-noise consumer-grade printers/scanners; lacks short-to-VS detection and open-load diagnosis-relies on external monitoring.	Choose for cost-sensitive, low-voltage (<15 V) designs where microstepping resolution outweighs diagnostic completeness.

Compared with TB6600HG and DRV8825, the L9935013TR trades raw current headroom for integrated protection, SPI configurability, and diagnostic transparency-making it optimal for industrial systems where reliability, fault traceability, and compact BOM are prioritized over maximum torque.

Availability

L9935013TR is available at Aetrix Electronics and suitable for industrial CNC positioning, automated test equipment, medical infusion pumps, and smart home HVAC dampers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for L9935013TR 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 markets.

The L9935 belongs to ST's automotive-qualified power driver product line, engineered specifically for robust, protected motion control in harsh environments-including extended temperature operation, ESD resilience, and built-in functional safety diagnostics.

FAQ

What is the maximum motor supply voltage supported by the L9935013TR?

The L9935013TR supports a continuous DC supply voltage (VS) from 8 V to 24 V, with absolute maximum ratings allowing pulsed operation up to 40 V for durations under 400 ms. This enables compatibility with standard 24 V industrial rails while surviving common inductive kickback transients without external clamping.

How does the L9935013TR implement current regulation without external op-amps?

The L9935013TR integrates a chopper-based PWM regulator that compares voltage across external sense resistors (SRA/SRB) to internal reference thresholds set by SPI bits. It directly controls DMOS gate drivers to maintain average coil current at one of four factory-calibrated levels (0/60/550/900 mA), eliminating need for external current-sense amplifiers or DACs.

Can multiple L9935013TR devices be synchronized for coordinated multi-axis motion?

Yes-the OSC pin accepts an external square-wave clock signal, enabling precise phase alignment of chopper oscillators across multiple L9935013TR units. This allows deterministic current ripple cancellation and jitter-free multi-axis stepping, confirmed in ST's application note AN4207 for cascaded configurations.

What diagnostic information is available via the SPI interface?

The SPI interface provides real-time readback of a 8-bit status register containing dedicated flags for overload (both bridges), open load (A/B), short-to-VS (A/B), and over-temperature pre-alarm. Flags are latched until cleared by a rising edge on CSN, enabling deterministic fault logging without polling overhead.

L9935013TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 20-SOIC (0.433", 11.00mm Width) Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Motor Type - Stepper:: Bipolar

Motor Type - AC, DC:: -

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

Output Configuration:: Half Bridge (4)

Interface:: SPI

Technology:: DMOS

Step Resolution:: 1, 1/2

Applications:: General Purpose

Current - Output:: 1.2A

Voltage - Supply:: 8V ~ 24V

Voltage - Load:: 8V ~ 24V

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PowerSO-20

L9935013TR FAQ

1.How can I place an order for L9935013TR through Aetrix?

Please submit a Request for Quotation (RFQ) for L9935013TR 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 L9935013TR reliable?

The price and inventory of L9935013TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L9935013TR is usually 5 days.

3.What payment methods are accepted for L9935013TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L9935013TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L9935013TR?

L9935013TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L9935013TR 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 L9935013TR?

For technical support, including L9935013TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L9935013TR requirements.

6.How does Aetrix verify that L9935013TR is sourced from the original manufacturer or authorized distributors?

All L9935013TR 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 L9935013TR meets industry standards.

7.What is the process for return or replacement of L9935013TR?

All L9935013TR units undergo pre-shipment inspection (PSI). If there is an issue with L9935013TR, 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 L9935013TR part is unused and in its original packaging.

Return procedure for L9935013TR:

1.Submit a request within 90 days.

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

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