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Allegro MicroSystems UDN2916EBTR-T
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- Part No.:
- UDN2916EBTR-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Motor Drivers, Controllers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
UDN2916EBTR-T.pdf
- Description:
- IC MOTOR DRIVER BIPOLAR 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,637
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Product details
Overview
UDN2916EBTR-T from Allegro MicroSystems is a dual full-bridge PWM motor driver IC designed to control both windings of bipolar stepper motors or bidirectionally drive two DC motors. It sustains 45 V motor supply, delivers 750 mA continuous output current per bridge, and features internal PWM current control with user-selectable 0%/33%/67%/100% current limits via logic inputs I0/I1 - used in industrial motion control systems requiring precise microstepping and thermal robustness.
For engineers reviewing the UDN2916EBTR-T datasheet, UDN2916EBTR-T pinout, UDN2916EBTR-T application, or UDN2916EBTR-T equivalent, key selection considerations include its 44-pin PLCC (EB) package with internally fused batwing leads for enhanced thermal dissipation, integrated clamp/flyback diodes, fixed off-time PWM architecture (46 μs typ.), and discontinuation status requiring legacy design support or migration planning.
Technical Context
The UDN2916EBTR-T implements two independent H-bridge drivers with internal PWM current regulation using external RC timing components (RT/CT) and a reference voltage (VREF) applied to each bridge. Each bridge uses a monostable multivibrator to generate fixed off-time (toff ≈ 46 μs with RT = 56 kΩ, CT = 820 pF), enabling current chopping above audible range while supporting microstepping via VREF adjustment.
Logic-level PHASE inputs determine current direction per bridge; I0/I1 digital inputs select four discrete current thresholds (0%, 33%, 67%, 100% of max) by scaling VREF/RS trip point; thermal shutdown activates at TJ = 170°C and resets at 145°C. Internal ground-clamp and flyback diodes eliminate need for external protection components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Sustaining Voltage | 45 V - supports high-voltage stepper/DC motor operation without external voltage clamping. |
| Continuous Output Current | 750 mA per bridge - enables driving NEMA 17–23 stepper motors or dual 12 V DC actuators. |
| Fixed Off-Time (toff) | 46 μs typical - ensures PWM frequency >21 kHz, eliminating audible noise in motion systems. |
| Output Saturation Voltage | ≤1.5 V total (source + sink at 750 mA) - minimizes conduction loss and thermal load during sustained operation. |
| Junction Temp Shutdown | 170°C activation / 145°C recovery - provides self-protecting thermal management without external circuitry. |
| VREF Input Range | 1.5–7.5 V - allows fine-grained peak current tuning for microstepping resolution down to 1/16-step. |
| Ambient Temp Range | –20°C to +85°C (Range N) - validated for commercial/industrial ambient environments without derating. |
Pinout & Package
The UDN2916EBTR-T is supplied in a 44-pin power PLCC (EB package) with 11 internally fused leads on each of two sides (pins 7–17 and 29–39), providing low thermal resistance (θJA = 30°C/W) via webbed batwing construction optimized for PCB copper heat spreading.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7–17, 29–39, 40, 41, 42, 43, 44 | Ground / Power Tab / Batwing Leads | Internally fused thermal paths - must be connected to large copper pour for effective heat dissipation. |
| VBB (Pin 24) | Motor Supply Input | 45 V max input - requires ≥47 μF electrolytic decoupling close to pin to suppress switching transients. |
| VCC (Pin 23) | Logic Supply Input | 4.75–5.25 V - powers internal logic; separate from VBB to avoid noise coupling into control circuitry. |
| PHASE1/PHASE2 (Pins 11, 32) | Bridge Direction Control | CMOS-compatible inputs - determine current flow direction per H-bridge; internal 2 μs dead time prevents shoot-through. |
| I0/I1 (Pins 10, 31) | Digital Current Limit Select | Set 0%/33%/67%/100% of max current - enable microprocessor-controlled torque modulation during half-step sequencing. |
| OUT1A/OUT1B/OUT2A/OUT2B (Pins 13, 15, 34, 36) | H-Bridge Outputs | Drive motor windings directly - low saturation voltage reduces power loss at 750 mA continuous load. |
| SENSE1/SENSE2 (Pins 14, 35) | Current Sense Inputs | Accept voltage drop across external RS - require dedicated ground return trace to avoid IR error in current measurement. |
| VREF1/VREF2 (Pins 12, 33) | Reference Voltage Inputs | Set peak current threshold (ITRIP = VREF/10RS) - filtered VREF improves microstepping stability. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent PWM bridges | Enables simultaneous, asynchronous control of two stepper phases or DC motors with separate current regulation. |
| Integrated clamp/flyback diodes | Eliminates need for 8 external diodes - reduces BOM count and PCB area in compact motion modules. |
| Logic-selectable current levels | Four discrete torque settings via I0/I1 - simplifies firmware implementation of hold/start torque profiles without analog DACs. |
| Batwing-fused PLCC thermal design | 30°C/W θJA on single-layer board - supports 750 mA per bridge continuously when paired with ≥6 cm² copper area. |
| Internal thermal shutdown | Auto-recovery at 145°C - protects against overtemperature failure during stall or overload without system-level intervention. |
Applications
| Industrial Stepper Positioning | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: Precision open-loop positioning of X-Y stages in CNC milling fixtures and pick-and-place machines. IC Role / Device Role / Timing Role: Dual full-bridge driver executing microstepped current waveforms synchronized to step/direction pulses from motion controller. Use Value: 750 mA per phase and 45 V headroom enable direct drive of high-torque NEMA 23 steppers without external MOSFETs or gate drivers. |
Use Scenario: Actuating solenoid valves and linear actuators in semiconductor wafer probers and functional test handlers. IC Role / Device Role / Timing Role: Bidirectional DC motor driver controlling Z-axis probe contact force and horizontal arm movement. Use Value: Logic-selectable current limits (0–100%) allow dynamic torque reduction during non-critical moves, lowering power consumption and heat generation. |
| Medical Infusion Pumps | Printed Circuit Board Assembly (PCBA) Equipment |
|
Use Scenario: Driving peristaltic pump rollers in hospital-grade IV infusion systems requiring fail-safe current limiting. IC Role / Device Role / Timing Role: Stepper motor driver implementing closed-loop current regulation via external sense resistors and internal PWM comparator. Use Value: Integrated thermal shutdown and 170°C trip point prevent overheating during occlusion events, meeting IEC 60601-1 safety margins. |
Use Scenario: Controlling conveyor belt speed and component placement head motion in SMT reflow ovens and vision-guided pick-and-place units. IC Role / Device Role / Timing Role: Dual H-bridge managing simultaneous transport and alignment axes under real-time PLC command. Use Value: Fixed 46 μs off-time ensures PWM frequency remains >21 kHz - eliminating audible whine in clean-room manufacturing environments. |
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 | Pin-compatible 24-pin SOIC replacement with improved 1 A continuous current rating, lower RDS(on), and extended –40°C to +125°C operation. | Supports higher ambient temperatures and longer duty cycles in enclosed enclosures without heatsinking. | Recommended for new designs requiring drop-in upgrade path and extended temperature compliance. |
| DRV8825PWPR | 28-pin TSSOP with integrated current DAC, 1/32 microstepping, and SPI interface - no external RC timing required. | Reduces external component count but requires MCU firmware support for register configuration and fault reporting. | Suitable where microstepping resolution >1/16-step and digital diagnostics are prioritized over analog simplicity. |
Compared with UDN2916EBTR-T, the A4970KLPTR-T offers higher current capability and broader temperature range in a smaller footprint, while the DRV8825PWPR trades analog PWM simplicity for digital configurability and finer microstepping - both require layout changes due to different packages and pinouts.
Availability
UDN2916EBTR-T is available at Aetrix Electronics and suitable for legacy industrial motion control, medical device repair, and aerospace maintenance programs requiring stable component supply for end-of-life product support.
Supply support for UDN2916EBTR-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 ICs, specializing in motion control, current sensing, and motor driver solutions since 1989.
The UDN2916EBTR-T belongs to Allegro's legacy dual full-bridge motor driver family, engineered for cost-sensitive, thermally demanding stepper and DC motor applications in industrial automation and instrumentation.
FAQ
Is UDN2916EBTR-T still in production?
No, the UDN2916EBTR-T is a discontinued product. Allegro officially ended production and no longer provides samples. It remains available through authorized distributors for legacy design support and repair, but new designs should migrate to recommended alternatives like the A4970KLPTR-T.
What is the maximum continuous current per bridge for UDN2916EBTR-T?
The UDN2916EBTR-T supports 750 mA continuous output current per bridge under specified thermal conditions. This rating assumes proper PCB copper area (≥6 cm² connected to batwing leads) and ambient temperature ≤85°C. Peak current capability is 1.0 A, limited by duty cycle and thermal management.
Does UDN2916EBTR-T require external flyback diodes?
No, the UDN2916EBTR-T integrates internal clamp and flyback diodes for both bridges. These diodes protect against inductive transients during current decay, eliminating the need for eight external diodes and reducing PCB space and BOM complexity in stepper motor driver designs.
How does the PWM current control work in UDN2916EBTR-T?
The UDN2916EBTR-T uses an internal comparator and monostable multivibrator to implement fixed off-time PWM. When sensed voltage across the external resistor RS reaches VREF/10, the source driver turns off for a fixed duration (e.g., 46 μs), then resumes - maintaining average winding current at the programmed level without requiring external oscillator circuitry.
What is the thermal resistance (θJA) of the UDN2916EBTR-T EB package?
The UDN2916EBTR-T in its 44-pin PLCC (EB) package has a measured θJA of 30°C/W on a single-layer PCB with 1 sq. in. of 2 oz copper. This value reflects the benefit of its internally fused batwing leads - significantly lower than the 40°C/W (B package) or 55°C/W (LB package) alternatives - enabling higher power density in space-constrained layouts.
UDN2916EBTR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 44-LCC (J-Lead)
- 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:
- -20°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.59x16.59)
UDN2916EBTR-T FAQ
1.How can I place an order for UDN2916EBTR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for UDN2916EBTR-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 UDN2916EBTR-T reliable?
The price and inventory of UDN2916EBTR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UDN2916EBTR-T is usually 5 days.
3.What payment methods are accepted for UDN2916EBTR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UDN2916EBTR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UDN2916EBTR-T?
UDN2916EBTR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UDN2916EBTR-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 UDN2916EBTR-T?
For technical support, including UDN2916EBTR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UDN2916EBTR-T requirements.
6.How does Aetrix verify that UDN2916EBTR-T is sourced from the original manufacturer or authorized distributors?
All UDN2916EBTR-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 UDN2916EBTR-T meets industry standards.
7.What is the process for return or replacement of UDN2916EBTR-T?
All UDN2916EBTR-T units undergo pre-shipment inspection (PSI). If there is an issue with UDN2916EBTR-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 UDN2916EBTR-T part is unused and in its original packaging.
Return procedure for UDN2916EBTR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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