STMicroelectronics E-L6219DS

Overview

E-L6219DS from STMicroelectronics is a bipolar stepper motor driver IC in SO24 package, capable of driving both windings of a bipolar stepper motor with up to 750 mA continuous current per bridge, 1 A peak startup current, and operation across 10 V–46 V motor supply voltage. It supports half-step, full-step, and microstepping modes with internal PWM current control and thermal shutdown protection-used in precision motion control systems such as CNC positioning stages and automated lab equipment.

For engineers reviewing the E-L6219DS datasheet, E-L6219DS pinout, E-L6219DS application, or E-L6219DS equivalent, key selection criteria include its dual H-bridge architecture, logic-level phase and current-select inputs (I0/I1), integrated recirculation diodes, 1.1 V typical output saturation voltage at 750 mA, and compatibility with unstabilized motor supplies.

Technical Context

The L6219 implements switch-mode current regulation using an internal PWM controller triggered by comparator outputs monitoring voltage across external sense resistors. Three selectable current levels (0%, 33%, 67%, 100% of I_MAX) are set via two logic inputs per winding, with reference voltage (VREF) scaling the absolute current limit linearly.

Its dual full-bridge output stage integrates eight transistors (four Darlington source drivers, four saturated sink drivers) and eight clamp diodes. Cross-conduction protection prevents shoot-through during direction switching, and a Schmitt-triggered PHASE input ensures noise-immune commutation timing with built-in delay.

Key Specifications

Pinout & Package

SO24 package (20 + 2 + 2 lead configuration), surface-mount, ECOPACK®-compliant, with exposed thermal pad connected to pins 6, 7, 18, 19 for enhanced heat transfer to PCB copper.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bipolar stepper motor driver applications.

Compared with TB6600HG and DRV8825, the E-L6219DS offers unique logic-selectable current levels and integrated protection diodes in a proven industrial SO24 package-making it optimal for cost-sensitive, medium-torque applications where design simplicity and thermal robustness outweigh ultra-fine microstepping or high-current capability.

Availability

E-L6219DS is available at Aetrix Electronics and suitable for CNC motion controllers, automated test equipment, and medical fluid handling systems requiring stable component supply and long-term industrial lifecycle support.

Supply support for E-L6219DS 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, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The L6219 belongs to ST's legacy motor driver product line, engineered specifically for reliable, low-complexity bipolar stepper control in industrial motion systems where integration, ruggedness, and ease of use are prioritized over ultra-high integration or digital interface features.

FAQ

What is the maximum continuous current per winding supported by the E-L6219DS?

The E-L6219DS delivers up to 750 mA continuous current per winding, verified under standard test conditions (T_j = 25 °C, V_S = 46 V). At elevated ambient temperatures or with limited PCB copper area, derating applies-e.g., 500 mA at 70 °C ambient with 2 oz copper and minimal heatsinking.

Can the E-L6219DS operate with an unregulated 24 VDC supply?

Yes-the E-L6219DS is explicitly designed for unstabilized motor supplies, supporting 10 V–46 V on the VS pin. Its internal regulation tolerates ripple and transient variations typical of unregulated industrial rails, provided adequate input capacitance (≥100 µF) is placed near pin 24.

How does the I0/I1 logic input combination affect motor current?

I0 and I1 select one of four fixed current levels per winding: L/L = 100% (750 mA), H/L = 67%, L/H = 33%, H/H = 0%. These settings scale linearly with VREF-for example, with VREF = 3 V, L/L yields 450 mA (3 V/5 V × 750 mA).

Is external current-sense resistor placement critical for stability?

Yes-ST specifies that the ground connection between the sense resistor (Rs) and IC GND (pins 6/7/18/19) must be as short as possible to minimize noise coupling into the comparator input. A shared, low-inductance ground plane is mandatory; routing Rs ground through vias or long traces causes false current-limit triggering.