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Allegro MicroSystems L6219DS
- Part No.:
- L6219DS
- Manufacturer:
- Allegro MicroSystems
- Category:
- Motor Drivers, Controllers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
L6219DS.pdf
- Description:
- IC MOTOR DRIVER BIPOLAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,670
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Product details
Overview
L6219DS 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, features internal PWM current control with user-selectable 0–100% current limits, and integrates clamp/flyback diodes and thermal shutdown. Used in precision motion control for industrial automation and embedded positioning systems.
For engineers reviewing the L6219DS datasheet, L6219DS pinout, L6219DS application, or L6219DS equivalent, key selection criteria include its 24-pin SOICW package with fused power leads, dual independent PWM current regulation via VREF/RC/CT, PHASE-controlled direction logic, and thermal protection triggering at 170°C junction temperature.
Technical Context
The L6219DS implements two independent high-side/low-side driver pairs with integrated ground-clamp and flyback diodes, enabling bidirectional current flow in each bridge. Each bridge uses a comparator-based current-sense loop with external RC timing (RT/CT) to set fixed off-time (typ. 46 μs), supporting slow-decay PWM current control up to 750 mA continuous.
Logic-level inputs I0 and I1 digitally select four current levels (0%, 33%, 67%, 100%) by scaling the VREF-derived trip threshold, while PHASE determines current direction per bridge. Internal dead time (~2 μs) prevents shoot-through during polarity switching, and thermal shutdown disables all outputs at TJ = 170°C with automatic recovery at 145°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Sustaining Voltage | 45 V - supports motor supplies up to 45 V without breakdown |
| Continuous Output Current | 750 mA per bridge - enables driving NEMA 17–23 stepper motors at full step |
| Output Saturation Voltage | <1.8 V total (source + sink) at 500 mA - minimizes conduction loss and heat generation |
| PWM Fixed Off-Time | 46 μs (RT = 56 kΩ, CT = 820 pF) - sets minimum decay interval for audible-noise suppression |
| Thermal Shutdown Threshold | 170°C junction temperature - protects against sustained overload or poor heatsinking |
| Logic Supply Range | VCC = 4.75–5.25 V - compatible with standard 5 V microcontroller interfaces |
| Reference Voltage Range | VREF = 1.5–7.5 V - enables microstepping resolution via analog current scaling |
Pinout & Package
Package: 24-pin SOICW (suffix LB), surface-mountable with internally fused leads (pins 6, 7, 18, 19) for enhanced thermal performance and power dissipation. Matte tin leadframe, Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 24 | VBB | Motor supply input - connects to 10–45 V DC motor rail; decoupled with ≥47 μF electrolytic capacitor |
| 2 | VCC | Logic supply input - powers internal logic and comparators; requires stable 4.75–5.25 V |
| 3, 4, 5, 20, 21, 22, 23 | GND | Ground reference - multiple pins reduce IR drop; separate low-impedance return required for sense resistors |
| 6, 7, 18, 19 | Power GND / Fused Leads | Internally fused ground paths - optimized for high-current return and thermal dissipation |
| 8, 9, 10, 11 | PHASE 1, I0, I1, VREF 1 | Bridge 1 control - PHASE sets direction; I0/I1 select current level (0–100%); VREF 1 sets trip threshold |
| 12, 13, 14, 15 | OUTA1, OUTB1, SENSE 1, COMP IN 1 | Bridge 1 outputs and sensing - OUTA1/OUTB1 drive motor winding; SENSE 1 feeds current-sense resistor voltage to comparator |
| 16, 17 | RC1, RT1 | Bridge 1 PWM timing - RC1 sets reference current; RT1/CT1 set fixed off-time (46 μs typical) |
| 19, 20 | OUTA2, OUTB2 | Bridge 2 outputs - identical function to Bridge 1 outputs; driven independently |
| 22, 23 | PHASE 2, VREF 2 | Bridge 2 control - PHASE 2 sets second winding direction; VREF 2 enables independent current scaling |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent PWM current control | Each bridge regulates peak current via separate VREF, RC, RT, CT - enables asymmetric microstepping and phase-tuned torque |
| Four-level digital current selection | I0/I1 inputs provide 0%/33%/67%/100% current scaling without external DAC - simplifies μP interface for half-step sequencing |
| Integrated protection diodes | Internal clamp and flyback diodes eliminate need for 8 external diodes - reduces BOM count and PCB area in dual-H-bridge designs |
| Fused SOICW power leads | Pins 6, 7, 18, 19 internally fused - improves thermal resistance (RθJT = 6°C/W) and allows 500 mA continuous dual-bridge operation |
| Programmable fixed off-time | RT/CT network sets decay interval (20–100 μs range) - balances EMI, ripple, and audible noise for specific motor inductance |
Applications
| Industrial CNC Positioning | Bipolar Stepper Motor Control |
|---|---|
Use Scenario: Precision open-loop positioning in desktop CNC mills and 3D printer toolheads requiring sub-millimeter repeatability. IC Role / Device Role / Timing Role: Dual full-bridge driver executing microstepped current profiles per winding, synchronized to step/direction pulses from motion controller. Use Value: Enables smooth 1/4–1/8 stepping via VREF scaling and eliminates external diode losses - improving thermal margin at 750 mA hold current. | Use Scenario: Bidirectional control of two independent DC motors in robotic grippers or linear actuators. IC Role / Device Role / Timing Role: Independent H-bridge driver per motor, using PHASE and I0/I1 to set direction and torque level per actuator. Use Value: Reduces component count vs discrete MOSFET solutions while providing integrated thermal shutdown and current limiting at 45 V/750 mA. |
| Medical Infusion Pumps | Automated Test Equipment (ATE) |
Use Scenario: Low-noise, repeatable syringe advancement in portable infusion pumps where audible PWM noise must be suppressed. IC Role / Device Role / Timing Role: Stepper driver implementing slow-decay PWM with 35 μs off-time (RT/CT tuned) to operate above 28 kHz. Use Value: Fixed off-time architecture avoids variable-frequency artifacts; thermal shutdown ensures fail-safe motor stall response. | Use Scenario: Actuating relay matrices and DUT interface fixtures requiring precise, sequenced motor movement under test program control. IC Role / Device Role / Timing Role: Dual-bridge driver accepting TTL-level I0/I1 commands from FPGA or microcontroller to modulate torque per axis. Use Value: Digital current scaling allows dynamic torque reduction during idle (hold) and boost during acceleration - extending motor life and reducing power draw. |
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 MOSFET drivers, no integrated clamp diodes | Requires external diodes and gate drivers; suited for high-power (>1 A) stepper systems | Select TB6600HG only when >1 A peak current or >50 V operation is required; L6219DS offers lower system cost for ≤750 mA applications. |
| DRV8825 | Microstepping up to 1/32, integrated current DAC, 2.2 A peak, smaller HTSSOP-28 package | Superior microstepping resolution and higher current, but lacks fused power leads and SOICW thermal robustness | Choose DRV8825 for compact PCBs needing fine microstepping; retain L6219DS where SOICW manufacturability, thermal reliability, and proven industrial field history are prioritized. |
Compared with TB6600HG and DRV8825, the L6219DS provides a mature, thermally robust SOICW solution optimized for 45 V/750 mA bipolar stepper control with minimal external components - making it ideal for cost-sensitive, high-reliability industrial motion subsystems where layout simplicity and long-term supply stability matter.
Availability
L6219DS is available at Aetrix Electronics and suitable for industrial CNC positioning, medical infusion pumps, automated test equipment, and bipolar stepper motor control requiring stable component supply and long-lifecycle support.
Supply support for 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
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 belongs to Allegro's legacy dual full-bridge motor driver product line, engineered for reliable, low-component-count bipolar stepper and dual-DC motor control in industrial and medical equipment.
FAQ
What is the maximum continuous current per bridge the L6219DS can deliver?
The L6219DS delivers 750 mA continuous output current per bridge under specified thermal conditions (e.g., 1-layer PCB with 3.57 in² copper). 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 board thermal design. The L6219DS datasheet specifies this limit explicitly in Absolute Maximum Ratings and Electrical Characteristics tables.
Does the L6219DS require external flyback diodes for inductive load protection?
No, the L6219DS does not require external flyback diodes. It integrates internal clamp and flyback diodes for both bridges, eliminating the need for eight discrete diodes in a dual-H-bridge configuration. These diodes protect against inductive transients during current decay, and their forward voltage is specified at 1.6–2.0 V at 750 mA. External diodes may be added for improved thermal performance at high currents, but they are not mandatory for basic operation of the L6219DS.
How does the L6219DS implement PWM current control without a microcontroller?
The L6219DS implements autonomous PWM current control using an internal comparator, monostable multivibrator, and external RC timing network (RT/CT). When winding current sensed across RS reaches VREF/10, the comparator triggers the monostable to turn off the source driver for a fixed off-time determined by RT × CT. This cycle repeats continuously, regulating average current without microcontroller intervention. The L6219DS thus functions as a self-contained current regulator - ideal for simple step/dir systems or analog-set microstepping.
What is the purpose of the fused leads (pins 6, 7, 18, 19) in the L6219DS SOICW package?
The fused leads (pins 6, 7, 18, 19) in the L6219DS SOICW package are internally thickened and thermally optimized to reduce thermal resistance between die and PCB. They lower RθJT to 6°C/W and improve power dissipation capability - enabling both bridges to operate continuously at 500 mA even on minimal copper. This fused construction allows the L6219DS to achieve higher power density than standard SOIC packages, making it suitable for space-constrained industrial motion modules where thermal reliability is critical.
Can the L6219DS drive unipolar stepper motors?
No, the L6219DS is not designed for unipolar stepper motor operation. It is a dual full-bridge driver intended exclusively for bipolar stepper motors (requiring current reversal per winding) or two independent bidirectional DC motors. Unipolar steppers rely on center-tapped windings and single-direction current flow per phase - incompatible with the L6219DS's H-bridge topology and current-sense architecture. Attempting unipolar use would result in incorrect phasing, loss of torque, and potential device stress. The L6219DS datasheet confirms its target application as "both windings of a bipolar stepper motor."
L6219DS 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 FAQ
1.How can I place an order for L6219DS through Aetrix?
Please submit a Request for Quotation (RFQ) for L6219DS 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 reliable?
The price and inventory of L6219DS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6219DS is usually 5 days.
3.What payment methods are accepted for L6219DS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6219DS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L6219DS?
L6219DS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L6219DS 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?
For technical support, including L6219DS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6219DS requirements.
6.How does Aetrix verify that L6219DS is sourced from the original manufacturer or authorized distributors?
All L6219DS 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 meets industry standards.
7.What is the process for return or replacement of L6219DS?
All L6219DS units undergo pre-shipment inspection (PSI). If there is an issue with L6219DS, 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 part is unused and in its original packaging.
Return procedure for L6219DS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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