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Allegro MicroSystems L6219DSTR-T
- Part No.:
- L6219DSTR-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Motor Drivers, Controllers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
L6219DSTR-T.pdf
- Description:
- IC MOTOR DRIVER BIPOLAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,643
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Product details
Overview
L6219DSTR-T from Allegro MicroSystems is a dual full-bridge PWM motor driver IC designed to drive both windings of a bipolar stepper motor or control two DC motors bidirectionally. It sustains 45 V, delivers 750 mA continuous output current per bridge, and features internal PWM current control with logic-selectable current limits (0/33/67/100%). Used in precision motion control systems requiring compact, thermally robust motor interfacing.
For engineers reviewing the L6219DSTR-T datasheet, L6219DSTR-T pinout, L6219DSTR-T application, or L6219DSTR-T equivalent, key selection criteria include its 45 V motor supply rating, 750 mA continuous current capability per bridge, integrated clamp/flyback diodes, thermal shutdown at 170°C, and SOICW-24 package with fused power leads for enhanced thermal dissipation.
Technical Context
The L6219DSTR-T implements two independent full-bridge drivers with internal PWM current regulation per channel, using external RC timing components (RT/CT) to set fixed off-time (typ. 46 μs). Each bridge employs a comparator-based current-sense loop referencing VREF and an external sense resistor (RS), enabling precise peak current control via ITRIP = VREF/(10·RS) scaling.
Direction control is managed by dedicated PHASE inputs per bridge, with internally generated ~2 μs dead time preventing shoot-through. Logic-level I0/I1 inputs digitally select four discrete current levels (0%, 33%, 67%, 100%) without external DACs, supporting half-step microstepping and hold/start torque modulation in embedded motion systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Motor Supply Voltage | 45 V max - supports industrial 24–42 V DC motor rails without external clamping |
| Continuous Output Current | 750 mA per bridge - enables direct driving of NEMA 11–17 stepper motors at full step |
| Output Saturation Voltage | <1.8 V total (source + sink) at 500 mA - minimizes conduction loss and self-heating |
| Thermal Shutdown Threshold | 170°C junction - protects against sustained overload while allowing transient torque peaks |
| Fixed Off-Time | 46 μs (RT = 56 kΩ, CT = 820 pF) - ensures PWM frequency >21 kHz to avoid audible noise |
| Logic Supply Range | 4.75–5.25 V - compatible with standard 5 V microcontroller I/O without level shifting |
| Package Thermal Resistance | RθJA = 49°C/W (with 3.57 in² copper) - enables 750 mA operation on 1-layer PCBs with minimal heatsinking |
Pinout & Package
Package: 24-pin SOICW (suffix LB), surface-mount, lead-free with 100% matte tin plating. Internally fused leads at pins 6, 7, 18, and 19 maximize power dissipation in compact footprint (15.4 mm × 7.5 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBB (Pin 1) | Motor supply input | High-current path for both bridges; requires local ≥47 μF electrolytic decoupling |
| VCC (Pin 2) | Logic supply input | Powers internal logic and comparators; must be stable 4.75–5.25 V |
| PHASE 1 (Pin 11) | Bridge 1 direction control | High = OUTA high / OUTB low; Low = OUTA low / OUTB high |
| I0, I1 (Pins 12, 13) | Digital current limit select | Set 0%/33%/67%/100% of max current via truth table; H/H disables all drivers |
| SENSE 1 (Pin 14) | Bridge 1 current sense input | Connects to external RS; max 1.5 V input rating prevents comparator saturation |
| OUTA/OUTB (Pins 15–17, 19–21) | H-bridge outputs | Four dedicated terminals per bridge; pins 6/7/18/19 are fused power leads |
| COMP IN 1 (Pin 22) | Bridge 1 current comparator input | Internal connection to SENSE 1; used with external RC for PWM timing |
| VREF (Pin 24) | Reference voltage input | Sets trip threshold; 1.5–7.5 V range enables microstepping current scaling |
Key Features
| Feature | Design Value |
|---|---|
| Integrated clamp and flyback diodes | Eliminates need for 8 external diodes; handles inductive kickback during current decay |
| Logic-selectable current levels | Four discrete torque settings via I0/I1 pins - enables software-controlled hold/start profiles |
| Fused internal power leads | Pins 6/7/18/19 carry high current with reduced thermal resistance - improves reliability at 750 mA |
| Internally generated dead time | ~2 μs delay between PHASE transitions - prevents cross-conduction without external timing circuitry |
| Thermal shutdown with hysteresis | Shuts down at 170°C, re-enables at 145°C - provides safe recovery without system reset |
Applications
| Industrial CNC Positioning | Bipolar Stepper Motor Control |
|---|---|
Use Scenario: Open-loop positioning in benchtop CNC mills and 3D printer extruders requiring sub-millimeter repeatability. IC Role / Device Role / Timing Role: Dual full-bridge driver executing microstep sequences with programmable current per phase via VREF and I0/I1. Use Value: Enables constant-torque half-stepping by switching between 100% (single-phase on) and 67% (dual-phase on) current levels, reducing resonance and improving positional accuracy. | Use Scenario: Bidirectional control of two independent 12–24 V DC motors in automated test equipment. IC Role / Device Role / Timing Role: Independent H-bridge controller per motor, using PHASE and I0/I1 for direction and torque modulation. Use Value: Eliminates need for discrete MOSFETs and gate drivers; integrated 45 V rating supports variable-speed operation across wide supply ranges. |
| Medical Infusion Pumps | Automated Laboratory Instrumentation |
Use Scenario: Precision fluid dosing in syringe pumps where motor stall detection and thermal safety are critical. IC Role / Device Role / Timing Role: Stepper driver with real-time current limiting and thermal shutdown to prevent overheating during occlusion events. Use Value: Internal 170°C shutdown and 1.5 V SENSE voltage limit protect against sensor failure-induced overcurrent, meeting IEC 60601-1 thermal safety requirements. | Use Scenario: Multi-axis sample handling in DNA sequencers and ELISA washers requiring synchronized motion. IC Role / Device Role / Timing Role: Dual-channel motor interface accepting step/direction signals from FPGA or MCU with configurable current per axis. Use Value: SOICW-24 package allows dense PCB layout; fused leads support 750 mA continuous drive without thermal derating in enclosed enclosures. |
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 |
|---|---|---|---|
| TB6600HG | Higher 4.5 A peak current, external MOSFETs required; no integrated clamp diodes | Requires external flyback protection and gate drivers; suited for high-power (>1 A) stepper systems | Select when >1 A peak current needed and board space allows discrete FET layout |
| DRV8825 | Microstepping up to 1/32, integrated current DAC, lower 2.2 A max current, 40 V rating | Superior microstepping resolution but limited to 40 V supply; lacks fused power leads | Select for high-resolution positioning where supply voltage ≤40 V and thermal margin is less constrained |
Compared with TB6600HG and DRV8825, the L6219DSTR-T offers superior thermal robustness via fused SOICW leads and integrated protection diodes, making it optimal for space-constrained 45 V industrial motion systems where reliability under sustained 750 mA load is critical.
Availability
L6219DSTR-T is available at Aetrix Electronics and suitable for industrial CNC positioning, medical infusion pumps, automated laboratory instrumentation, and bipolar stepper motor control requiring stable component supply across extended temperature ranges (–20 to +85°C).
Supply support for L6219DSTR-T 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
Allegro MicroSystems is a U.S.-based designer and manufacturer of high-performance magnetic sensing and power IC solutions, headquartered in Worcester, Massachusetts.
The L6219DSTR-T belongs to Allegro's legacy motor driver product line, engineered specifically for cost-sensitive, thermally demanding bipolar stepper and dual-DC motor applications in industrial and medical equipment.
FAQ
What is the maximum motor supply voltage supported by the L6219DSTR-T?
The L6219DSTR-T supports a maximum motor supply voltage (VBB) of 45 V, as specified in its Absolute Maximum Ratings. This rating allows reliable operation with common industrial 24 V and 36 V DC bus systems, including transient spikes within specification. Exceeding 45 V risks permanent damage to the internal output transistors and clamp diodes. The L6219DSTR-T maintains full 750 mA current capability across its 10–45 V operating range.
How does the L6219DSTR-T implement PWM current control without an external oscillator?
The L6219DSTR-T uses an internal monostable multivibrator triggered by the current-sense comparator to generate fixed off-time PWM. When the sensed voltage across the external RS resistor reaches the VREF-derived threshold, the comparator triggers the monostable, turning off the source driver for a duration set by external RT and CT components. This architecture eliminates the need for an external clock source while maintaining precise current regulation. The L6219DSTR-T's typical off-time is 46 μs with RT = 56 kΩ and CT = 820 pF.
Can the L6219DSTR-T drive a unipolar stepper motor?
No, the L6219DSTR-T is not designed for unipolar stepper motors. It is a dual full-bridge driver optimized for bipolar stepper windings or two independent DC motors, requiring four-terminal connection per winding. Unipolar steppers use center-tapped windings and require different switching topologies (e.g., single-pole double-throw). Attempting to drive a unipolar motor with the L6219DSTR-T will result in incorrect phase sequencing and potential device stress. Use the L6219DSTR-T only with true bipolar stepper motors or dual DC loads.
What is the purpose of the fused leads in the L6219DSTR-T SOICW package?
The fused leads (pins 6, 7, 18, and 19) in the L6219DSTR-T's SOICW package are thickened internal connections designed to carry high current with lower thermal resistance. This construction reduces power dissipation at the bond wires and leadframe interface, enabling the L6219DSTR-T to sustain 750 mA per bridge continuously without exceeding safe junction temperatures. The fused design improves long-term reliability in thermally constrained layouts where external heatsinking is impractical.
Does the L6219DSTR-T require external flyback diodes for inductive load protection?
No, the L6219DSTR-T integrates clamp diodes and flyback diodes internally for each output transistor, eliminating the need for eight external diodes typically required in discrete H-bridge designs. These diodes protect against inductive transients generated during current decay in stepper windings or DC motor coils. The internal diodes are rated for 750 mA continuous forward current and 45 V reverse voltage, matching the L6219DSTR-T's operational envelope. External diodes are only recommended for extreme thermal improvement in high-duty-cycle applications.
L6219DSTR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- Power MOSFET
- Step Resolution:
- 1, 1/2
- Applications:
- General Purpose
- Current - Output:
- 750mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Voltage - Load:
- 10V ~ 45V
- Operating Temperature:
- -20°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
L6219DSTR-T FAQ
1.How can I place an order for L6219DSTR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for L6219DSTR-T 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 L6219DSTR-T reliable?
The price and inventory of L6219DSTR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6219DSTR-T is usually 5 days.
3.What payment methods are accepted for L6219DSTR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6219DSTR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L6219DSTR-T?
L6219DSTR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L6219DSTR-T 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 L6219DSTR-T?
For technical support, including L6219DSTR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6219DSTR-T requirements.
6.How does Aetrix verify that L6219DSTR-T is sourced from the original manufacturer or authorized distributors?
All L6219DSTR-T 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 L6219DSTR-T meets industry standards.
7.What is the process for return or replacement of L6219DSTR-T?
All L6219DSTR-T units undergo pre-shipment inspection (PSI). If there is an issue with L6219DSTR-T, 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 L6219DSTR-T part is unused and in its original packaging.
Return procedure for L6219DSTR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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