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Allegro MicroSystems L6219DS-T
- Part No.:
- L6219DS-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Motor Drivers, Controllers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
L6219DS-T.pdf
- Description:
- IC MOTOR DRIVER BIPOLAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,775
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Product details
Overview
L6219DS-T 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, and features internal PWM current control with selectable 0/33/67/100% current limits via logic inputs I0/I1. Used in precision motion control systems requiring compact, thermally robust motor interface.
For engineers reviewing the L6219DS-T datasheet, L6219DS-T pinout, L6219DS-T application, or L6219DS-T equivalent, this page provides verified technical context on its dual-bridge architecture, thermal shutdown at 170°C, low 1.8 V total saturation voltage (source + sink at 500 mA), and SOICW-24 fused-lead package optimized for power dissipation.
Technical Context
The L6219DS-T integrates two independent full-H-bridge drivers with internal clamp and flyback diodes, fixed-off-time PWM current regulation (46 μs typical), and 2 μs internally generated dead time to prevent shoot-through during PHASE switching. Each bridge supports independent current sensing via external RS and reference voltage (VREF) scaling.
Logic-level PHASE inputs determine current direction per bridge; I0/I1 inputs digitally select trip thresholds (VREF/10, VREF/15, VREF/30, or 0). Thermal protection disables all outputs at TJ = 170°C and re-enables at 145°C. No special power-up sequencing is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Sustaining Voltage | 45 V - supports motors up to 45 V supply without breakdown |
| Continuous Output Current | 750 mA per bridge - enables driving NEMA 17–23 stepper motors at full torque |
| Output Saturation Voltage | <1.8 V total (source + sink at 500 mA) - reduces conduction loss and self-heating |
| Thermal Shutdown Threshold | 170°C junction temperature - protects against sustained overload or poor heatsinking |
| Fixed Off-Time | 46 μs (RT = 56 kΩ, CT = 820 pF) - ensures PWM chopping above audible range & stable current regulation |
| Logic Supply Range | VCC = 4.75–5.25 V - compatible with standard 5 V microcontroller I/O |
| Reference Voltage Range | VREF = 1.5–7.5 V - enables precise microstepping current scaling via external DAC or resistor divider |
Pinout & Package
Package: 24-pin SOICW (suffix LB), surface-mountable with four internally fused leads (pins 6, 7, 18, 19) for enhanced thermal performance and power dissipation. Lead-free, 100% matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 24 | VBB | Motor supply input - connects to 10–45 V DC rail; requires ≥47 μF local electrolytic decoupling |
| 2, 23 | VCC | Logic supply input - powers internal logic and comparators; must be 4.75–5.25 V |
| 3, 4, 20, 21 | GROUND | Power ground return - dedicated low-impedance path for motor current and sense resistor returns |
| 5, 12, 16, 17 | OUTA / OUTB (Bridge 1 & 2) | H-bridge outputs - drive motor windings; each pair forms one full bridge |
| 6, 7, 18, 19 | Fused Power Pins | Internally fused leads - carry high-current paths; critical for thermal management and reliability |
| 8, 9, 13, 14 | SENSE1 / SENSE2, COMP IN1 / COMP IN2 | Current sense inputs - accept voltage drop across external RS to trigger PWM off-cycle |
| 10, 11, 15, 22 | PHASE1 / PHASE2, I0 / I1 | Digital control inputs - PHASE sets winding current direction; I0/I1 select 0/33/67/100% current limit |
| 19 | VREF | Reference voltage input - sets peak current threshold as ITRIP = VREF / (10 × RS) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent full-bridge topology | Enables simultaneous bipolar stepper control or dual DC motor operation without external H-bridge components |
| Internal PWM current regulation | Eliminates need for external oscillator or comparator; uses monostable RC timing (RT/CT) for fixed off-time control |
| Four-level digital current scaling | I0/I1 logic inputs allow microcontroller-driven torque modulation (e.g., 100% active phase, 67% dual-phase hold in half-step mode) |
| Integrated clamp and flyback diodes | Protects against inductive kickback without external diodes - simplifies PCB layout and reduces BOM count |
| Fused-lead SOICW package | Four internally fused power pins reduce thermal resistance (RθJT = 6°C/W) and support 750 mA continuous per bridge |
Applications
| Industrial CNC Positioning | Medical Infusion Pump Actuation |
|---|---|
Use Scenario: Precision open-loop positioning of linear stages in benchtop CNC mills using NEMA 17 stepper motors. IC Role / Device Role / Timing Role: Dual full-bridge driver delivering synchronized, current-regulated phase currents to maintain torque across speed ranges. Use Value: Low 1.8 V saturation voltage minimizes heat generation during extended dwell periods; fused SOICW package ensures thermal stability under 24/7 operation. | Use Scenario: Bidirectional syringe actuation in programmable IV infusion pumps requiring smooth, low-noise microstepping. IC Role / Device Role / Timing Role: PWM-controlled current driver enabling 1/4–1/8 microstepping via VREF adjustment and I0/I1 sequencing. Use Value: Fixed 46 μs off-time suppresses audible noise; internal dead time prevents shoot-through during rapid direction reversal. |
| Automotive HVAC Blower Control | Lab Automation Robotic Gripper |
Use Scenario: Dual DC motor control for synchronized left/right air flap actuation in automotive climate control modules. IC Role / Device Role / Timing Role: Independent full-bridge driver for two 12 V DC motors, with logic-level PHASE and I0/I1 enabling direction and torque staging. Use Value: 45 V sustaining voltage accommodates load-dump transients; thermal shutdown (170°C) prevents latch-up during stall conditions. | Use Scenario: Compact robotic end-effector using bipolar stepper for precise grip force control in automated test equipment. IC Role / Device Role / Timing Role: Current-regulated dual-bridge interface between ARM Cortex-M4 controller and 0.9° stepper motor. Use Value: Selectable 0% current mode (I0=I1=H) enables fast current decay for high-speed step transitions; SENSE pin isolation prevents ground bounce errors. |
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 |
|---|---|---|---|
| STK682-050-E | Higher 1.2 A peak current, integrated current sense amplifier, but no logic-level I0/I1 current scaling | Requires external op-amp for current feedback; better suited for closed-loop servo than open-loop stepper | Choose when higher peak current and analog current monitoring are needed over digital current staging |
| TB6600HG | Microstepping up to 32x, higher 4.5 A output, but larger HTSSOP-28 package and no fused-lead thermal design | Targets high-torque industrial steppers; lacks integrated clamp diodes - requires external flyback protection | Prefer for high-resolution microstepping systems where board space and external diode overhead are acceptable |
Compared with STK682-050-E and TB6600HG, the L6219DS-T offers unique value in compact 24-pin SOICW packaging with fused power leads, built-in diodes, and direct microcontroller-compatible logic inputs for torque staging - making it optimal for space-constrained, cost-sensitive open-loop stepper applications.
Availability
L6219DS-T is available at Aetrix Electronics and suitable for industrial CNC positioning, medical infusion pump actuation, and automotive HVAC blower control requiring stable component supply and long-term lifecycle continuity.
Supply support for L6219DS-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 Hall-effect sensors, motor drivers, and power ICs, headquartered in Worcester, Massachusetts.
The L6219DS-T belongs to Allegro's legacy dual full-bridge motor driver product line, engineered specifically for cost-effective, thermally robust open-loop stepper and dual-DC motor control in industrial and medical equipment.
FAQ
What is the maximum continuous current rating per bridge for the L6219DS-T?
The L6219DS-T supports 750 mA continuous output current per bridge under specified thermal conditions (e.g., 1-layer PCB with 3.57 in² copper area, RθJA = 49°C/W). This rating assumes proper heatsinking and ambient temperature ≤85°C. Peak current capability is 1.0 A, but sustained operation above 750 mA requires derating based on duty cycle and thermal design. The L6219DS-T datasheet specifies that exceeding 750 mA continuously risks junction temperature exceeding 150°C.
Does the L6219DS-T require external flyback diodes for inductive load protection?
No, the L6219DS-T integrates clamp and flyback diodes within the IC for each output stage, eliminating the need for external diodes in most applications. These internal diodes protect against inductive transients generated by stepper motor windings or DC motor back-EMF. However, for high-duty-cycle or high-current applications, Allegro recommends adding external fast-recovery diodes (≤200 ns) in parallel to improve thermal performance and reduce switching losses - but this is optional, not mandatory. The L6219DS-T functions safely without them.
How does the L6219DS-T implement PWM current control without an external oscillator?
The L6219DS-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 (e.g., 56 kΩ and 820 pF yield 46 μs). This eliminates the need for an external clock or oscillator. The L6219DS-T's architecture relies entirely on this self-timed, current-comparator-driven scheme - no external timing signal is required for basic operation.
Can the L6219DS-T be used for microstepping applications?
Yes, the L6219DS-T supports microstepping through analog control of the VREF input voltage, which directly scales the current trip threshold (ITRIP = VREF / (10 × RS)). By varying VREF with a DAC or precision voltage source, users can achieve smooth current interpolation between full-step positions. While it lacks built-in microstepping logic like dedicated indexer ICs, the L6219DS-T's analog current control and independent bridge operation make it suitable for external microstepping controllers. The L6219DS-T is commonly deployed in 1/4- and 1/8-step systems with appropriate MCU firmware.
What is the purpose of the fused leads (pins 6, 7, 18, 19) in the L6219DS-T SOICW package?
The fused leads (pins 6, 7, 18, 19) in the L6219DS-T's SOICW-24 package are internally bonded power terminals designed to lower thermal resistance and increase current-carrying capacity. They reduce RθJT to 6°C/W - significantly improving heat transfer from the die to the PCB - and enable reliable 750 mA continuous operation per bridge in compact layouts. Unlike standard SOIC leads, these fused connections minimize voltage drop and self-heating under load. The L6219DS-T leverages this mechanical enhancement to deliver higher power density without requiring a larger package or external heatsink.
L6219DS-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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
L6219DS-T FAQ
1.How can I place an order for L6219DS-T through Aetrix?
Please submit a Request for Quotation (RFQ) for L6219DS-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 L6219DS-T reliable?
The price and inventory of L6219DS-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6219DS-T is usually 5 days.
3.What payment methods are accepted for L6219DS-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6219DS-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L6219DS-T?
L6219DS-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L6219DS-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 L6219DS-T?
For technical support, including L6219DS-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6219DS-T requirements.
6.How does Aetrix verify that L6219DS-T is sourced from the original manufacturer or authorized distributors?
All L6219DS-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 L6219DS-T meets industry standards.
7.What is the process for return or replacement of L6219DS-T?
All L6219DS-T units undergo pre-shipment inspection (PSI). If there is an issue with L6219DS-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 L6219DS-T part is unused and in its original packaging.
Return procedure for L6219DS-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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