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Allegro MicroSystems L6219DSTR
- Part No.:
- L6219DSTR
- Manufacturer:
- Allegro MicroSystems
- Category:
- Motor Drivers, Controllers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
L6219DSTR.pdf
- Description:
- IC MOTOR DRIVER BIPOLAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,318
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Product details
Overview
L6219DSTR from Allegro MicroSystems is a dual full-bridge PWM motor driver IC designed to drive both windings of a bipolar stepper motor or bidirectionally control two DC motors. It sustains 45 V, delivers 750 mA continuous output current per bridge, features internal PWM current control with user-selectable reference voltage and sense resistor, and integrates clamp/flyback diodes for inductive load protection. It is used in precision motion control systems requiring compact, thermally robust motor interface.
For engineers reviewing the L6219DSTR datasheet, L6219DSTR pinout, L6219DSTR application, or L6219DSTR equivalent, key selection criteria include its 45 V motor supply rating, 750 mA continuous current capability per bridge, internal thermal shutdown at 170°C, logic-level I0/I1 current scaling (0/33/67/100%), and SOICW-24 package with fused power leads for enhanced thermal dissipation.
Technical Context
The L6219DSTR implements two independent full-bridge drivers with integrated PWM current regulation per channel. Each bridge uses an external sense resistor (RS), comparator, and monostable multivibrator to enforce peak current limits defined by VREF and RS via ITRIP = VREF/(10·RS) - with digital scaling via I0/I1 inputs altering the effective gain factor.
It employs internally generated ~2 μs dead time between source/sink switching to prevent shoot-through, includes ground-clamp and flyback diodes per output, and features thermal shutdown that disables all drivers at TJ = 170°C and re-enables them at 145°C. No special power-up sequencing is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Motor Supply Voltage | 45 V max - supports industrial and automotive-grade motor supplies without external clamping |
| Continuous Output Current | 750 mA per bridge - enables direct driving of medium-torque stepper windings or small DC motors |
| Output Saturation Voltage | <1.8 V total (source + sink) at 500 mA - reduces conduction losses and thermal load during sustained operation |
| PWM Fixed Off-Time | 46 μs typical (RT=56 kΩ, CT=820 pF) - sets minimum current decay interval to maintain >20 kHz chopping frequency |
| Thermal Shutdown Threshold | 170°C junction temperature - provides fail-safe protection without requiring external thermal monitoring circuitry |
| Logic Input Compatibility | TTL/CMOS-compatible (VIN(1) ≥2.4 V, VIN(0) ≤0.8 V) - allows direct interfacing with microcontrollers and FPGAs without level-shifting |
| Current Scaling Options | 0%, 33%, 67%, or 100% of max via I0/I1 logic inputs - enables torque-matched half-step sequencing and hold/start current modulation |
Pinout & Package
The L6219DSTR is supplied in a 24-pin surface-mount SOICW (Package LB, JEDEC MS-013 AD), with pins 6, 7, 18, and 19 internally fused to maximize power dissipation in minimal PCB area. The matte tin-plated leadframe is lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBB (Pin 1) | Motor supply input | High-current path for up to 45 V motor bus; requires local ≥47 μF electrolytic decoupling |
| VCC (Pin 2) | Logic supply input | Provides 4.75–5.25 V bias for internal logic and comparators; separate from VBB ground return |
| PHASE 1/2 (Pins 11, 12) | Bridge direction control | Determines current polarity per winding; internally generates 2 μs dead time to prevent shoot-through |
| I0/I1 (Pins 14, 15) | Digital current scaling inputs | Select 0%/33%/67%/100% of full-scale trip current; high-high state disables all drivers (output enable) |
| SENSE 1/2 (Pins 16, 17) | Current sense inputs | Accept voltage drop across external RS; must be routed with dedicated low-IR ground trace |
| OUTA/OUTB (Pins 20–23) | Full-bridge outputs | Four high-side/low-side driver terminals per bridge; each includes integrated clamp/flyback diodes |
| VREF (Pin 24) | Reference voltage input | Sets base current limit via ITRIP = VREF/(10·RS); filtered externally to reject noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PWM current regulation | Eliminates need for external current-loop controller ICs or op-amp feedback networks |
| Fused internal power leads (Pins 6,7,18,19) | Reduces thermal resistance RθJA to 49°C/W with 3.57 in² copper area - improves power handling by 36% vs standard SOIC |
| Dual independent full-bridge topology | Enables simultaneous bipolar stepper control or independent bidirectional DC motor operation without inter-channel crosstalk |
| Logic-level I0/I1 current scaling | Supports microcontroller-driven torque matching in half-step sequences without external DACs or PWM dimming |
| Internal thermal shutdown with hysteresis | Auto-recovery at 145°C prevents latch-up and eliminates need for external reset circuitry after overtemperature events |
Applications
| Industrial CNC Positioning | Medical Infusion Pumps |
|---|---|
Use Scenario: Precision open-loop positioning of X/Y/Z axes in benchtop CNC mills using 1.8° bipolar stepper motors. IC Role / Device Role / Timing Role: Dual full-bridge driver executing microstepping current profiles with synchronized PHASE and I0/I1 control. Use Value: Enables constant-torque 8-step half-stepping via 100%/67% current scaling, reducing resonance and improving positional accuracy without encoder feedback. | Use Scenario: Bidirectional peristaltic pump actuation in portable IV infusion devices requiring silent, low-power motor control. IC Role / Device Role / Timing Role: Dual DC motor driver regulating flow rate via PWM duty cycle and current-limited acceleration/deceleration. Use Value: Internal 46 μs fixed off-time ensures current chopping remains above audible range (<20 kHz), eliminating mechanical whine during patient care. |
| Automotive HVAC Actuators | Lab Automation Robotic Arms |
Use Scenario: Controlling blend door and mode door actuators in vehicle climate control systems under 12 V/24 V battery supply. IC Role / Device Role / Timing Role: Full-bridge driver managing bidirectional DC motor movement with integrated flyback protection against inductive kickback. Use Value: 45 V sustaining voltage accommodates load-dump transients up to ISO 7637-2 Pulse 5a, ensuring reliability in automotive electrical environments. | Use Scenario: Driving multi-axis articulated joints in compact benchtop robotic platforms requiring precise torque control and thermal resilience. IC Role / Device Role / Timing Role: Stepper motor driver implementing microstepping with VREF-adjusted current limits for smooth low-speed motion. Use Value: Low 1.8 V total saturation voltage minimizes self-heating at 500 mA hold current, enabling continuous operation without heatsinking in space-constrained 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 |
|---|---|---|---|
| STK682-010-E | Higher 1.2 A peak current, but no integrated PWM current control - requires external current-sense amplifier and comparator | Used in higher-torque applications where external loop control is already present; lacks I0/I1 digital scaling | Select when peak current >750 mA is required and system already implements analog current feedback |
| TB6600HG | Supports up to 4.5 A, includes built-in microstepping logic, but requires 5 V logic supply only - no VCC range flexibility | Targeted at high-resolution stepper systems with integrated step/direction interface; not suitable for dual independent DC motor control | Select for plug-and-play microstepping with step/dir inputs, not for custom current-profile generation via VREF/RS |
Compared with STK682-010-E and TB6600HG, the L6219DSTR offers unique integration of programmable PWM current control, digital current scaling, and fused-lead thermal performance in a compact SOICW package - making it optimal for cost-sensitive, space-constrained designs requiring flexible, microcontroller-driven motor profiles.
Availability
L6219DSTR is available at Aetrix Electronics and suitable for industrial CNC positioning, medical infusion pumps, automotive HVAC actuators, and lab automation robotic arms requiring stable component supply across extended production lifecycles.
Supply support for L6219DSTR 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 Hall-effect sensors, motor drivers, and power ICs, headquartered in Worcester, Massachusetts.
The L6219DSTR belongs to Allegro's legacy dual full-bridge motor driver product line, engineered specifically for precision open-loop stepper and bidirectional DC motor control in space- and thermally constrained industrial and medical equipment.
FAQ
What is the maximum continuous output current per bridge of the L6219DSTR?
The L6219DSTR supports 750 mA continuous output current per bridge under specified thermal conditions (e.g., 49°C/W PCB layout). This rating assumes proper heat sinking and ambient temperature ≤85°C. Peak current capability is 1.0 A, but sustained operation above 750 mA requires derating based on duty cycle, ambient temperature, and copper area - the L6219DSTR datasheet specifies junction temperature must remain ≤150°C for reliable operation.
Does the L6219DSTR require external flyback diodes for inductive load protection?
No, the L6219DSTR does not require external flyback diodes. It integrates internal clamp and flyback diodes for each output terminal (OUTA/OUTB per bridge), providing protection against inductive transients during current commutation. These diodes are rated for 750 mA forward current and 2.0 V forward voltage at that level - sufficient for typical stepper and small DC motor applications. External fast-recovery diodes may be added only to improve thermal performance at high duty cycles.
How does the L6219DSTR implement current limiting and PWM control?
The L6219DSTR implements current limiting using an external sense resistor (RS), internal comparator, and monostable multivibrator. The trip point is set by ITRIP = VREF/(10·RS), and the fixed off-time (typically 46 μs) determines decay duration. When the sensed voltage at SENSE reaches VREF/10, the source driver turns off; current recirculates through the internal sink transistor and clamp diode. The L6219DSTR repeats this cycle to maintain average winding current - no external PWM signal is needed.
What is the function of the I0 and I1 inputs on the L6219DSTR?
The I0 and I1 inputs on the L6219DSTR provide digital selection of output current scaling: 0%, 33%, 67%, or 100% of the full-scale trip current (ITRIP). This enables microcontroller-driven torque matching - for example, applying 100% current when one phase is active and 67% when both phases conduct in half-step mode. A logic-high state on both I0 and I1 disables all drivers, serving as an output enable/disable function for rapid current decay between steps.
What package type and thermal characteristics apply to the L6219DSTR?
The L6219DSTR is packaged in a 24-pin SOICW (suffix LB, JEDEC MS-013 AD) with internally fused power leads (Pins 6, 7, 18, 19) to enhance thermal conductivity. Its thermal resistance is 77°C/W on a 1-layer PCB with limited copper, but improves to 49°C/W with 3.57 in² of copper area. The L6219DSTR also features RθJT = 6°C/W, allowing accurate junction temperature estimation using pin temperature measurements and load current data.
L6219DSTR 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 FAQ
1.How can I place an order for L6219DSTR through Aetrix?
Please submit a Request for Quotation (RFQ) for L6219DSTR 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 reliable?
The price and inventory of L6219DSTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6219DSTR is usually 5 days.
3.What payment methods are accepted for L6219DSTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6219DSTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L6219DSTR?
L6219DSTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L6219DSTR 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?
For technical support, including L6219DSTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6219DSTR requirements.
6.How does Aetrix verify that L6219DSTR is sourced from the original manufacturer or authorized distributors?
All L6219DSTR 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 meets industry standards.
7.What is the process for return or replacement of L6219DSTR?
All L6219DSTR units undergo pre-shipment inspection (PSI). If there is an issue with L6219DSTR, 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 part is unused and in its original packaging.
Return procedure for L6219DSTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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