STMicroelectronics E-L6219DS013TR

Overview

E-L6219DS013TR 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 output current per bridge, 10 V–46 V motor supply range, and support for full-step, half-step, and microstepping modes. It integrates dual H-bridge output stages with built-in clamp diodes, internal PWM current control, and thermal shutdown-used in precision motion control systems such as CNC positioning stages and automated lab equipment.

For engineers reviewing the E-L6219DS013TR datasheet, E-L6219DS013TR pinout, E-L6219DS013TR application, or E-L6219DS013TR equivalent, key selection criteria include verified 750 mA per winding drive capability, SO24 thermal resistance (R_thj-amb = 75 °C/W), logic-compatible phase and input control, internal current-sense comparator thresholds (10 V typical at trip point), and compatibility with unstabilized motor supplies.

Technical Context

The L6219 implements switch-mode current regulation using dual independent H-bridge output stages, each with Darlington source and saturated sink transistors plus integrated recirculation diodes. Current limiting is enforced via external sense resistors and three selectable current levels (0%, 33%, 67%, or 100% of I_Omax) controlled by two logic inputs per winding.

A monostable single-pulse generator sets off-time (t_off = 1.1·R_TC_T) upon comparator trip, enabling precise peak-current control up to 1 A startup surge. Phase inputs feature Schmitt-trigger noise immunity and delay circuitry to prevent shoot-through during direction reversal.

Key Specifications

Pinout & Package

SO24 package (20 + 2 + 2 lead configuration): 24-pin small outline with exposed thermal pad (pins 6, 7, 18, 19 serve as ground and thermal conduction paths). Pin pitch: 1.27 mm; body width: 7.5 mm; max height: 2.65 mm.

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-L6219DS013TR offers a balanced integration level: built-in diodes and thermal protection reduce BOM count and layout complexity, while its SO24 package and 750 mA rating suit space-constrained embedded motion modules where reliability and ease of qualification matter more than ultra-fine stepping.

Availability

E-L6219DS013TR is available at Aetrix Electronics and suitable for CNC motion control, 3D printer axis drivers, and automated laboratory instrumentation requiring stable component supply, long-lifecycle availability, and consistent parametric performance across production batches.

Supply support for E-L6219DS013TR 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 applications.

The L6219 belongs to ST's legacy motor driver product line, engineered specifically for cost-sensitive, high-reliability bipolar stepper control in industrial motion systems where integrated protection, wide supply range, and proven thermal behavior are prioritized over advanced digital interfaces.

FAQ

What is the maximum allowable motor supply voltage for E-L6219DS013TR?

The absolute maximum motor supply voltage (VS) is 50 V, but the recommended operating range is 10 V to 46 V per the datasheet. Operation above 46 V risks exceeding safe SOA limits during transient conditions, especially during current decay or inductive kickback. Sustained use at 46 V requires adequate PCB copper area for thermal dissipation given R_thj-amb = 75 °C/W.

Can E-L6219DS013TR drive unipolar stepper motors?

No - the L6219 is designed exclusively for bipolar stepper motors or dual DC motors. Its dual H-bridge topology requires four-wire bipolar connections (two independent windings); it cannot interface with the center-tapped configuration of unipolar steppers. Attempting unipolar operation would result in incorrect current paths and potential device damage.

How does the RC network (pins 12/14) affect motor performance?

The RC network sets the off-time (t_off) of the PWM current regulator: t_off = 1.1·R_TC_T. This directly controls current decay rate between pulses - shorter t_off increases average current ripple and acoustic noise; longer t_off improves current stability but reduces maximum step rate. Typical values (e.g., 56 kΩ + 820 pF → 50 µs) balance torque smoothness and speed capability.

Is external current-sense resistor placement critical?

Yes - the sense resistor (RS) must be placed in the low-side emitter path (pins 3/23), and its ground return must connect directly to pins 6/7/18/19 with minimal trace length. Any shared impedance between RS ground and logic ground introduces offset errors in current regulation, causing inconsistent torque or premature current limiting. A dedicated Kelvin sense layout is strongly recommended.