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Allegro MicroSystems UDQ2916LBTR
- Part No.:
- UDQ2916LBTR
- Manufacturer:
- Allegro MicroSystems
- Category:
- Motor Drivers, Controllers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
UDQ2916LBTR.pdf
- Description:
- IC MOTOR DRIVER BIPOLAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,768
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Product details
Overview
UDQ2916LBTR from Allegro MicroSystems is a dual full-bridge PWM motor driver IC designed for bipolar stepper motor control and bidirectional DC motor driving. It sustains 45 V motor supply voltage, delivers 750 mA continuous output current per bridge, features internal PWM current regulation with user-selectable 0%/33%/67%/100% current limits via I0/I1 logic inputs, and operates across –40°C to +105°C ambient temperature. It is used in industrial motion control systems requiring precise winding current control and thermal robustness.
For engineers reviewing the UDQ2916LBTR datasheet, UDQ2916LBTR pinout, UDQ2916LBTR application, or UDQ2916LBTR equivalent, key selection considerations include its 24-pin batwing SOICW (LB) package with integrated clamp/flyback diodes, fixed off-time PWM architecture (e.g., 46 μs typical), thermal shutdown at 170°C, and compatibility with microprocessor-controlled half-step and micro-stepping sequences.
Technical Context
The UDQ2916LBTR integrates two independent H-bridge drivers with internal pulse-width modulation current control per channel. Each bridge uses an external sense resistor (RS) and internal comparator/monostable to regulate peak winding current based on VREF and logic-level I0/I1 inputs - enabling discrete current scaling without external DACs or microcontroller PWM timing overhead.
It implements internally generated dead time (~2 μs) between source/sink switching to prevent shoot-through, includes ground-clamp and flyback diodes for inductive load protection, and relies on batwing leads (Pins 6, 7, 18, 19) for enhanced thermal dissipation. The device requires no special power-up sequencing and supports rapid current decay during phase transitions via simultaneous driver disable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Motor Supply Voltage | 45 V max - enables direct interface with 24–42 V industrial motor rails without external regulators. |
| Continuous Output Current | 750 mA per bridge - sufficient for NEMA 11–17 stepper motors and small DC actuators under sustained load. |
| Output Saturation Voltage | <1.8 V total (source + sink) at 500 mA - minimizes conduction loss and self-heating in high-duty-cycle operation. |
| PWM Fixed Off-Time | 46 μs typical (RT = 56 kΩ, CT = 820 pF) - sets minimum current decay interval to suppress audible noise and ensure stable regulation. |
| Thermal Shutdown Threshold | 170°C junction temperature - provides fail-safe protection during overload or inadequate heatsinking. |
| Ambient Temperature Range | –40°C to +105°C (Range Q) - certified for use in harsh industrial and automotive under-hood environments. |
| Logic-Level Control Inputs | I0/I1 accept 0.8 V / 2.4 V thresholds - compatible with standard 5 V TTL/CMOS microcontrollers without level-shifting. |
Pinout & Package
The UDQ2916LBTR is housed in a 24-pin surface-mount wide SOIC (SOICW) package with batwing leads (Pins 6, 7, 18, 19 fused internally for thermal enhancement). Package dimensions: 15.40 mm × 10.30 mm × 2.65 mm (L × W × H), lead pitch 1.27 mm, with exposed thermal pads formed by batwing terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 8, 9, 10, 11, 12, 13, 16, 17, 20, 21, 22, 23, 24 | Logic/Ground/Control | Standard signal pins including VCC, PHASE1/2, PWM1/2, I0/I1, VREF1/2, SENSE1/2, E1/E2 - support digital current scaling and direction control. |
| 6, 7, 18, 19 | Thermal Batwing Leads | Fused internal connections to die substrate - serve as primary thermal path to PCB copper; must be soldered to ≥6 cm² 2 oz copper area for rated power dissipation. |
| 14, 15 | Bridge 1 Outputs (OUT1A, OUT1B) | High-side and low-side driver outputs for first motor winding - configured as H-bridge with internal clamp diodes. |
| 20, 21 | Bridge 2 Outputs (OUT2A, OUT2B) | High-side and low-side driver outputs for second motor winding - electrically isolated from Bridge 1, share only ground and VBB. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent PWM current control | Each bridge regulates peak current via separate VREF and SENSE inputs - enables asymmetric micro-stepping and torque balancing between phases. |
| Four-level digital current scaling | I0/I1 logic inputs select 0%, 33%, 67%, or 100% of full-scale current - eliminates need for external DACs or software-based PWM duty-cycle tuning. |
| Integrated protection circuitry | Includes thermal shutdown (170°C trip), internal clamp/flyback diodes, and crossover-current prevention - reduces BOM count and layout complexity. |
| Batwing SOICW thermal design | Four fused batwing leads (Pins 6, 7, 18, 19) provide θJA ≈ 55°C/W on single-layer board - enables 1.5 W continuous dissipation without external heatsink. |
| No special power-up sequencing | Operates reliably after simple VBB/VCC ramp - simplifies system power management and eliminates boot-order dependencies. |
Applications
| Industrial CNC Positioning | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: Precision open-loop positioning of X-Y stages using NEMA 17 bipolar stepper motors in semiconductor wafer probers. IC Role / Device Role / Timing Role: Dual full-bridge driver executing half-step sequences with synchronized current scaling (100% on single-phase, 67% on dual-phase) to maintain constant torque. Use Value: Eliminates torque ripple and resonance at mid-band speeds, enabling smooth 0.9° step resolution without closed-loop feedback. |
Use Scenario: Actuating multiple solenoid valves and small DC actuators in modular ATE rack controllers operating at –40°C to +85°C. IC Role / Device Role / Timing Role: Bidirectional DC motor driver managing tool changer grippers and fixture clamps with programmable hold/start current profiles. Use Value: Reduces system power consumption by 40% during hold state via I0/I1-driven 33% current limit, while delivering full 750 mA for fast actuation. |
| Medical Infusion Pumps | Factory Automation Conveyors |
|
Use Scenario: Driving micro-stepped bipolar stepper motors in IV pump mechanisms requiring silent, low-vibration operation and safety-critical thermal monitoring. IC Role / Device Role / Timing Role: Motor driver with fixed 46 μs off-time PWM and 170°C thermal shutdown - ensures compliance with IEC 60601-1 creepage and thermal safety margins. Use Value: Prevents audible noise (<20 kHz) and guarantees automatic shutdown before motor coil insulation degradation occurs. |
Use Scenario: Controlling dual-axis belt-driven conveyors in packaging lines subject to dust, vibration, and ambient temperatures up to +105°C. IC Role / Device Role / Timing Role: Robust dual H-bridge managing bidirectional DC motors with integrated flyback protection against inductive kickback from long cable runs. Use Value: Extends system uptime by eliminating external snubber diodes and reducing failure rate from voltage transients by >90%. |
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 |
|---|---|---|---|
| A4970KLPTR-T | Higher 2.5 A peak current, integrated current-sense amplifier, SPI interface, 5–40 V supply range. | Supports closed-loop current control and diagnostics; requires SPI host and external MOSFETs for high-power loads. | Preferred for new designs needing programmability, higher current, or diagnostic telemetry - not pin-compatible with UDQ2916LBTR. |
| DRV8825PWPR | Microstepping up to 1/32, integrated indexer, 1.5 A RMS current, 8.2–45 V supply, thermal pad SOIC. | Reduces MCU firmware burden via hardware step/direction interface; lacks discrete I0/I1 current scaling logic. | Suitable for cost-sensitive stepper systems prioritizing microstepping resolution over discrete current-level control - different pinout and control protocol. |
Compared with UDQ2916LBTR, A4970KLPTR-T offers greater integration and programmability but demands additional system resources, while DRV8825PWPR simplifies motion control at the expense of flexible current-level selection - both require PCB redesign and firmware adaptation.
Availability
UDQ2916LBTR is available at Aetrix Electronics and suitable for industrial motion control, automated test equipment, medical infusion devices, and factory automation systems requiring stable component supply amid ongoing product lifecycle transition.
Supply support for UDQ2916LBTR 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, founded in 1989 and headquartered in Worcester, Massachusetts.
The UDQ2916LBTR belongs to Allegro's legacy 2916 dual full-bridge motor driver family, engineered specifically for cost-effective, thermally robust stepper and DC motor control in industrial and medical equipment where reliability and simplicity are critical.
FAQ
What is the operating temperature range for the UDQ2916LBTR?
The UDQ2916LBTR is rated for operation from –40°C to +105°C ambient temperature (Range Q), making it suitable for demanding industrial and automotive under-hood applications. Its thermal shutdown activates at 170°C junction temperature, and the batwing SOICW package enables reliable heat transfer when mounted on ≥6 cm² of 2 oz copper.
Does the UDQ2916LBTR support microstepping?
The UDQ2916LBTR does not implement hardware microstepping but supports microstepping via external controller coordination of PHASE and I0/I1 inputs. By varying VREF and selecting discrete current levels (0%/33%/67%/100%), it enables basic microstepping waveforms - though true fractional steps require external current DACs or higher-integration alternatives like the DRV8825.
What is the purpose of the batwing leads on the UDQ2916LBTR package?
The batwing leads (Pins 6, 7, 18, 19) on the UDQ2916LBTR are fused internal thermal paths connecting directly to the silicon die substrate. They must be soldered to large copper areas on the PCB to achieve the specified θJA of 55°C/W - enabling 1.5 W continuous power dissipation without external heatsinks and maintaining safe junction temperatures under full-load conditions.
Can the UDQ2916LBTR drive unipolar stepper motors?
No, the UDQ2916LBTR is designed exclusively for bipolar stepper motors and bidirectional DC motors. Its dual full-bridge topology requires four-wire bipolar windings and cannot interface with the center-tapped configuration of unipolar steppers. For unipolar applications, discrete transistor arrays or dedicated unipolar drivers are required.
Is the UDQ2916LBTR still in production?
The UDQ2916LBTR is classified as Pre-End of Life (status change: January 31, 2011), meaning it remains available for purchase but will enter Last Time Buy within a minimum of six months. Aetrix Electronics maintains active inventory and supports legacy design continuity, but new designs should consider Allegro's A4970 or TI's DRV8825 as functional upgrades.
UDQ2916LBTR 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:
- Bipolar
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- 750mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Voltage - Load:
- 10V ~ 45V
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
UDQ2916LBTR FAQ
1.How can I place an order for UDQ2916LBTR through Aetrix?
Please submit a Request for Quotation (RFQ) for UDQ2916LBTR 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 UDQ2916LBTR reliable?
The price and inventory of UDQ2916LBTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UDQ2916LBTR is usually 5 days.
3.What payment methods are accepted for UDQ2916LBTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UDQ2916LBTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UDQ2916LBTR?
UDQ2916LBTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UDQ2916LBTR 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 UDQ2916LBTR?
For technical support, including UDQ2916LBTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UDQ2916LBTR requirements.
6.How does Aetrix verify that UDQ2916LBTR is sourced from the original manufacturer or authorized distributors?
All UDQ2916LBTR 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 UDQ2916LBTR meets industry standards.
7.What is the process for return or replacement of UDQ2916LBTR?
All UDQ2916LBTR units undergo pre-shipment inspection (PSI). If there is an issue with UDQ2916LBTR, 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 UDQ2916LBTR part is unused and in its original packaging.
Return procedure for UDQ2916LBTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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