Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

STMicroelectronics E-L9935013TR

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

Compare

Part No.:: E-L9935013TR

Manufacturer:: STMicroelectronics

Category:: Motor Drivers, Controllers

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

Datasheet:: E-L9935013TR.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,369

Please send an inquiry. Send us your inquiry, and we will respond immediately.

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 and delivers precise microstepping control in compact PowerSO-20 packaging for industrial motion control systems.

For engineers reviewing the L9935013TR datasheet, L9935013TR pinout, L9935013TR application, or L9935013TR equivalent, key selection criteria include chopper current setting resolution (four levels via SPI bits), flyback current decay optimization, EMI-reduced output voltage slew control, and diagnostic flag behavior during VS/ground shorts.

Technical Context

The L9935013TR implements offset-phase chopper control across two independent full bridges-each with dedicated current-sense resistors (SRA/SRB) and programmable current thresholds (LL/LH/HL/HH). Its oscillator-based PWM regulates winding current by dynamically blanking comparator inputs during switching transients to suppress false overcurrent triggers.

Protection logic integrates real-time diagnostics: short-to-VS detection activates within 2–5 µs using 1.5× nominal current threshold, while open-load and thermal pre-alarm (130–160 °C) assert a shared error flag readable via SPI. All protections reset only upon CSN rising edge after new command write.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	±1.1 A DC per bridge; supports bipolar stepper motors up to 1.2 A peak with thermal derating.
Supply Voltage	8–24 V DC operating range; absolute max 35 V pulsed - enables direct connection to 24 V industrial rails.
Current Regulation	Four-step chopper setting (900/550/60 mA typ.) via SPI bits - allows fine-tuning torque vs. efficiency trade-offs.
Thermal Shutdown	160–200 °C trip range with 10–30 K hysteresis - prevents latch-up while permitting brief overload operation.
SPI Interface	4-wire synchronous protocol (SCK/SDI/SDO/CSN); supports daisy-chaining multiple drivers with synchronized oscillator.
EMI Reduction	Controlled output voltage slew rates - minimizes radiated emissions without external snubbers in Class B compliance.
Standby Current	Typ. 40 µA at TJ ≤ 85 °C - enables low-power hold modes in battery-backed positioning systems.

Pinout & Package

Package: PowerSO-20 - thermally enhanced exposed die-pad package with 5 °C/W junction-to-case resistance, optimized for high-current motor drive dissipation.

Pin/Terminal	Circuit Role	Design Meaning
1,10,11,20	GND	Common ground reference for logic, power, and sense circuits; internally bonded to metal frame for thermal conduction.
2,9,13,18	OUTA1/OUTB1/OUTB2/OUTA2	Full-bridge output terminals - drive stepper phase windings with bidirectional current capability.
3,4,5,7	SCK/SDI/SDO/CSN	SPI bus signals - enable configuration, status readback, and synchronized multi-driver control.
6	VCC	5 V logic supply - powers internal registers and interface; decoupling required near pin.
8	EN	Active-low enable - disables all bridges and reduces quiescent current to 40 µA when held high.
12,19	SRB/SRA	Current-sense resistor connections - set chopper thresholds independently per bridge (0.33 Ω typical).
14	CDRV	Charge pump buffer capacitor node - stabilizes gate drive voltage for high-side DMOS transistors.
15	OSC	Oscillator timing node - sets chopper frequency (20–31 kHz with 1 nF); supports external clock injection.
16	VS	Main motor supply input - powers output bridges; must be filtered with low-ESR capacitors near device.
17	NC	No connect - electrically isolated; no routing or soldering required.

Key Features

Feature	Design Value
Offset-phase chopper control	Reduces total supply current ripple by 50% versus single-phase chopping - lowers input capacitor stress and EMI.
Programmable current thresholds	Four discrete settings per bridge (LL/LH/HL/HH) - enables adaptive torque delivery across speed/load profiles.
Short-to-VS detection	Identifies faults within 2–5 µs using 1.5× nominal current threshold - prevents catastrophic failure before thermal shutdown.
Diagnostic error flag	Single-pin open-drain output indicating over-temp, open-load, or short - simplifies system-level fault logging.
Controlled output slew rates	Adjustable rise/fall times (0.3–1.5 µs) - suppresses electromagnetic radiation without sacrificing step response.

Applications

Industrial CNC Positioning

Automated Optical Inspection

Use Scenario: Precision X-Y stage movement in PCB inspection machines requiring sub-micron repeatability and vibration-free settling.

IC Role / Device Role / Timing Role: Dual full-bridge driver executing half/full-step sequences via SPI commands; chopper regulation maintains constant winding current across acceleration phases.

Use Value: Offset-phase chopping minimizes supply current ripple, reducing noise coupling into sensitive camera analog front-ends and improving image SNR.

Use Scenario: High-speed lens focus actuation in AOI systems where rapid direction reversal and position hold accuracy are critical.

IC Role / Device Role / Timing Role: Bipolar stepper controller managing bidirectional coil current with programmable current limits to avoid mechanical resonance at mid-band speeds.

Use Value: Four-step current setting allows dynamic reduction of holding current during idle periods - cutting power dissipation by >60% without losing position lock.

Medical Infusion Pumps

Lab Automation Dispensers

Use Scenario: Syringe-driven fluid delivery requiring smooth, pulseless flow at low speeds (<1 RPM) with fail-safe stall detection.

IC Role / Device Role / Timing Role: Motor driver with open-load and over-temperature pre-alarm flags - enables early fault detection before occlusion or motor seizure occurs.

Use Value: Diagnostic flag assertion on CSN edge allows deterministic recovery sequence - ensuring regulatory-compliant fault handling per IEC 62304.

Use Scenario: Multi-channel reagent dispensing where synchronized multi-axis motion avoids cross-contamination during pipette tip exchange.

IC Role / Device Role / Timing Role: SPI-configurable driver in daisy-chain topology - permits coordinated start/stop and current profile updates across 3+ axes from single MCU.

Use Value: External oscillator synchronization eliminates beat frequencies between axes - preventing mechanical vibration that could disturb liquid meniscus stability.

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 peak output but no integrated current-sense resistors or SPI interface - requires external op-amps and GPIO control.	Best suited for high-torque open-loop systems where microstepping resolution is secondary to raw current capacity.	Select when needing >2 A per phase and willing to implement discrete current sensing and protection logic.
DRV8825	Integrated microstepping (up to 1/32) and thermal shutdown, but lacks open-load detection and uses step/direction interface instead of SPI.	Ideal for cost-sensitive consumer robotics where diagnostic granularity is less critical than ease of MCU integration.	Choose for simpler control architecture and finer microstepping, accepting reduced fault visibility and no daisy-chain capability.

Compared with TB6600HG and DRV8825, the L9935013TR uniquely combines SPI configurability, four-level chopper tuning, and comprehensive diagnostics in a thermally robust PowerSO-20 package - making it optimal for safety-critical industrial motion where reliability and debuggability outweigh raw current headroom.

Availability

L9935013TR is available at Aetrix Electronics and suitable for industrial CNC positioning, automated optical inspection, medical infusion pumps, and lab automation dispensers requiring stable component supply and long-term lifecycle support.

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, designing and manufacturing analog, mixed-signal, power, and microcontroller solutions for industrial, automotive, and consumer markets.

The L9935 product line targets high-reliability motor control applications, emphasizing integrated protection, EMI resilience, and diagnostic transparency for mission-critical motion systems.

FAQ

What is the maximum allowable supply voltage for continuous operation?

The L9935013TR supports continuous operation up to 24 V DC, with absolute maximum ratings specifying -0.3 V to 35 V for DC supply and up to 40 V for pulses under 400 ms. Operation above 24 V risks exceeding thermal limits unless heatsinking and ambient conditions are strictly controlled per R_thj-amb = 8 °C/W data.

How does the chopper current regulation respond to changing motor load inertia?

The chopper regulation maintains constant average winding current regardless of load inertia by adjusting PWM duty cycle in real time - measured via external SRA/SRB resistors. Inertia changes affect acceleration rate but not regulated current magnitude, provided supply voltage and thermal limits are respected.

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

Yes - the OSC pin supports external clock injection, enabling precise synchronization of chopper frequencies across multiple devices. Combined with daisy-chained SPI, this allows deterministic phase alignment and simultaneous step execution across axes without software timing jitter.

What diagnostic information is available through the error flag pin?

The open-drain error flag indicates over-temperature pre-alarm (130–160 °C), open-load condition, or short-circuit (to VS or GND) on either bridge. It does not distinguish between bridges or fault types - full diagnosis requires reading SPI status register bits after flag assertion and CSN reset.

E-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:: Active

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

E-L9935013TR FAQ

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

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

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

3.What payment methods are accepted for E-L9935013TR?

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

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for E-L9935013TR?

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

Once your E-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 E-L9935013TR?

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

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

All E-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 E-L9935013TR meets industry standards.

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

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

Return procedure for E-L9935013TR:

1.Submit a request within 90 days.

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

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…