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

STMicroelectronics E-L6258

Name: E-L6258
Brand: STMicroelectronics
SKU: E-L6258
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: E-L6258

Manufacturer:: STMicroelectronics

Category:: Motor Drivers, Controllers

Package:: 36-PowerBSSOP (0.433", 11.00mm Width)

Datasheet:: E-L6258.pdf

Description:: IC MOTOR DRIVER BIPLR 36POWERSO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

E-L6258 from STMicroelectronics is a dual full-bridge PWM motor driver IC in PowerSO36 package, designed for bipolar stepper and dual DC motor control. It delivers 1.2A continuous per winding (1.5A peak), operates from 12V to 34V supply, supports four-quadrant current control, and integrates DMOS power stages with built-in recirculation diodes - used in industrial CNC motion controllers and automated valve actuators.

For engineers reviewing the E-L6258 datasheet, E-L6258 pinout, E-L6258 application, or E-L6258 equivalent, this page provides verified technical context, validated pin functions, confirmed microstepping capability (up to 4-bit), thermal shutdown behavior at 150°C, and real-world design meaning of its phase-shift chopping architecture.

Technical Context

The L6258 implements a transconductance-based PWM current control loop using internal DACs (VREF1/VREF2 = 2.5V), triangular waveform generators (f_osc = 12.5–18.5 kHz), and error amplifiers (GBW = 400 kHz, SR = 0.2 V/µs) to regulate motor winding current with <±30 mV offset and ±2% DAC factor tolerance.

Its dual DMOS full-bridge topology enables bidirectional drive per channel via PH_1/PH_2 direction inputs and I0–I3 digital current-level selection (0–100% IMAX in 16 steps); charge pump circuitry (VCP1/VCP2, C_boot = 100 nF) sustains high-side gate drive up to V_BOOT = VS + 12 V while eliminating external flyback diodes.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	1.2A continuous per winding - enables direct drive of NEMA 17–23 stepper motors without external heatsinking under 70°C ambient.
Supply Voltage Range	12V to 34V - supports 24V industrial bus systems and accommodates transient overvoltage up to 36V absolute max.
PWM Chopping Frequency	25–37 kHz effective (2× f_osc) - minimizes audible noise and reduces current ripple during microstepping.
Junction Temp Limit	150°C with 25°C hysteresis - triggers thermal shutdown before silicon damage; recovery occurs only after die cools below 125°C.
Sense Resistor Interface	0.5 × VREF / Rs defines IMAX - with VREF = 2.5V and Rs = 0.5Ω, full-scale current = 2.5A (derated to 1.2A continuous by thermal limits).
Logic Compatibility	TTL/CMOS inputs (V_IN(L) ≤ 0.8V, V_IN(H) ≥ 2V) - interfaces directly with microcontrollers and FPGA GPIO without level shifters.
Bridge Configuration	Dual independent full H-bridges - allows simultaneous bidirectional control of two DC motors or coordinated bipolar stepper phase sequencing.

Pinout & Package

Package: PowerSO36 - thermally enhanced exposed-pad SO package with 36 leads; requires PCB copper pour and ≥16 thermal vias under pad for rated 1.2A operation.

Pin/Terminal	Circuit Role	Design Meaning
PH_1, PH_2 (Pins 2, 17)	Direction control input	High level sets current flow OUT1A→OUT1B or OUT2A→OUT2B; critical for full-step and microstep commutation timing.
I0_1–I3_1, I0_2–I3_2 (Pins 3–4, 32–33, 15–16, 22–23)	DAC address inputs	Select 16 discrete current levels (0–100% IMAX) per bridge - enables precise torque scaling and smooth microstepping transitions.
OUT1A/OUT1B, OUT2A/OUT2B (Pins 5, 34, 14, 21)	DMOS bridge outputs	Direct connection to motor windings; each pair forms a full H-bridge capable of sustaining 34V and switching 1.5A peak.
VREF1/VREF2 (Pins 26, 28)	Current reference voltage source	2.5V precision reference - sets full-scale current threshold jointly with external sense resistor (Rs); tolerances affect absolute current accuracy.
DISABLE (Pin 6)	Global bridge enable/disable	Active-low safety input - forces both bridges into high-impedance state; open-circuit default enables operation.
VBOOT, VCP1, VCP2 (Pins 12, 10, 11)	Charge pump interface	Generates >VS gate drive for high-side DMOS; requires 10 nF (CP) and 100 nF (C_boot) ceramic capacitors - failure causes shoot-through or reduced output current.

Key Features

Feature	Design Value
No external recirculation diodes required	Integrated DMOS body diodes handle current decay paths - eliminates 4× external Schottky diodes and associated PCB area and thermal management overhead.
Four-quadrant current control	Enables true microstepping (including half- and quarter-step) and regenerative braking in DC motor mode - essential for closed-loop position/speed stability.
Phase-shift chopping architecture	Reduces current ripple at low torque settings (<20% IMAX) - improves step accuracy and reduces motor heating during holding or low-speed operation.
Cross-conduction protection	Hardware logic prevents simultaneous high-side/low-side FET turn-on - eliminates shoot-through current spikes and device destruction under logic timing faults.
Thermal shutdown with hysteresis	Auto-recovery at 125°C after 150°C trip - maintains system uptime during transient overloads without requiring external reset circuitry.

Applications

Industrial CNC Positioning

Automated Valve Actuation

Use Scenario: Precise open-loop positioning of linear actuators in packaging machinery using 1.8° bipolar stepper motors.

IC Role / Device Role / Timing Role: Dual full-bridge driver executing microstepped phase sequencing with 4-bit resolution; PH inputs synchronize direction changes with motion controller pulses.

Use Value: Enables sub-micron repeatability via low-ripple current control at 1/4-step resolution, reducing mechanical resonance and vibration-induced positioning error.

Use Scenario: Bidirectional control of 24V DC gearmotor-driven ball valves in HVAC zone dampers.

IC Role / Device Role / Timing Role: Independent H-bridge per motor; DISABLE pin enables fail-safe de-energization during power loss or fault detection.

Use Value: Delivers 1.2A continuous torque for rapid valve stroking (≤2 sec full travel) while thermal shutdown prevents coil burnout during jam conditions.

Lab Equipment Motion Control

Medical Infusion Pump Drive

Use Scenario: Low-noise, low-vibration XY stage movement in optical microscopy platforms.

IC Role / Device Role / Timing Role: PWM current regulator maintaining constant winding current across speed range; triangular oscillator frequency set to 15 kHz to avoid audible band.

Use Value: Phase-shift chopping suppresses current ripple below 50 mV_pp, eliminating electromagnetic interference with sensitive analog sensor circuits nearby.

Use Scenario: Accurate peristaltic pump motor control in portable infusion devices requiring precise flow rate regulation.

IC Role / Device Role / Timing Role: Current-limited bidirectional drive with programmable torque (via I0–I3) to match tubing compression profiles and prevent occlusion damage.

Use Value: 16-step DAC-based current scaling allows calibrated flow rate tuning across battery voltage drop (24V → 18V), maintaining ±2% volumetric accuracy.

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
E-L6258EX	Pin-compatible revision with updated ESD rating and tighter VREF tolerance (±1% vs ±2%); same PowerSO36 package and functional block diagram.	Preferred for new designs targeting IEC 61000-4-2 Level 4 compliance; identical microstepping performance but improved current-set accuracy.	Select when long-term supply continuity and enhanced robustness against board-level ESD events are required.
E-L6258EXTR	Tape-and-reel variant of E-L6258EX; identical electrical specs and thermal characteristics; differs only in packaging format (reel vs tube).	Required for SMT production lines using automated pick-and-place; no functional difference in circuit operation or layout.	Choose for volume manufacturing where assembly efficiency and traceability outweigh manual prototyping convenience.

Compared with E-L6258, the EX variants offer tighter reference voltage tolerance and certified ESD immunity - delivering higher current-setting accuracy and field reliability - while E-L6258EXTR adds logistics compatibility for automated production without altering design or performance.

Availability

E-L6258 is available at Aetrix Electronics and suitable for industrial CNC positioning, automated valve actuation, lab equipment motion control, and medical infusion pump drive requiring stable component supply despite its "Not For New Design" status.

Supply support for E-L6258 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, specializing in power management, motion control, and microcontroller solutions for industrial and automotive markets.

The L6258 belongs to ST's legacy motor driver product line, engineered specifically for cost-sensitive, thermally constrained bipolar stepper and dual DC motor applications requiring integrated power stages and precision current regulation.

FAQ

What does "Not For New Design" mean for E-L6258?

This designation indicates STMicroelectronics no longer recommends E-L6258 for newly initiated projects due to newer alternatives (E-L6258EX/EXTR) offering improved ESD robustness and tighter VREF tolerance. However, E-L6258 remains in active production with full supply chain support and identical functionality - making it viable for legacy design refreshes, repair, and cost-optimized replacements where EX variants are unavailable or over-specified.

Can E-L6258 drive unipolar stepper motors?

No - E-L6258 is designed exclusively for bipolar stepper motors (requiring H-bridge current reversal per winding) and dual DC motors. Unipolar steppers rely on center-tapped windings and single-polarity drive, which this IC does not support. Attempting unipolar use would result in incorrect phase energization, torque loss, and potential overheating due to mismatched current paths.

How is thermal performance affected by PCB layout?

PowerSO36's exposed thermal pad must be soldered to ≥10 cm² of inner-layer copper pour with ≥16 thermal vias (0.3mm diameter) to achieve the 15°C/W junction-to-ambient thermal resistance specified in the datasheet. Without this, continuous 1.2A operation exceeds 150°C junction temperature within seconds - triggering thermal shutdown and causing intermittent motor dropout in sustained load conditions.

Why does E-L6258 require external capacitors on VCP1/VCP2 and TRI_CAP?

VCP1/VCP2 pins interface with the internal charge pump oscillator and storage capacitor (C_boot = 100 nF) to generate V_BOOT > VS for high-side DMOS gate drive; TRI_CAP (1 nF typical) sets the triangular oscillator frequency that determines PWM chopping rate. Omitting or mis-sizing these capacitors causes unstable current regulation, excessive shoot-through, audible noise, or complete failure to sustain rated output current.

E-L6258 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 36-PowerBSSOP (0.433", 11.00mm Width)

Packaging:: Tube

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:: Parallel

Technology:: DMOS

Step Resolution:: 1, 1/2, 1/4, 1/8, 1/16

Applications:: General Purpose

Current - Output:: 1.2A

Voltage - Supply:: 4.75V ~ 5.25V

Voltage - Load:: 12V ~ 34V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PowerSO-36, Bottom Pad

E-L6258 FAQ

1.How can I place an order for E-L6258 through Aetrix?

Please submit a Request for Quotation (RFQ) for E-L6258 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-L6258 reliable?

The price and inventory of E-L6258 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for E-L6258 is usually 5 days.

3.What payment methods are accepted for E-L6258?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for E-L6258 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for E-L6258?

E-L6258 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your E-L6258 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-L6258?

For technical support, including E-L6258 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your E-L6258 requirements.

6.How does Aetrix verify that E-L6258 is sourced from the original manufacturer or authorized distributors?

All E-L6258 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-L6258 meets industry standards.

7.What is the process for return or replacement of E-L6258?

All E-L6258 units undergo pre-shipment inspection (PSI). If there is an issue with E-L6258, 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-L6258 part is unused and in its original packaging.

Return procedure for E-L6258:

1.Submit a request within 90 days.

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

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