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Allegro MicroSystems UDQ2916EBTR
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- Part No.:
- UDQ2916EBTR
- Manufacturer:
- Allegro MicroSystems
- Category:
- Motor Drivers, Controllers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
UDQ2916EBTR.pdf
- Description:
- IC MOTOR DRIVER BIPOLAR 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,845
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Product details
Overview
UDQ2916EBTR from Allegro MicroSystems is a dual full-bridge PWM motor driver IC designed for bipolar stepper motor control and bidirectional DC motor operation. It sustains 45 V motor supply, delivers 750 mA continuous output current per bridge, features internal PWM current regulation with user-selectable 0%/33%/67%/100% current limits, and operates across –40°C to +105°C ambient temperature. It is used in industrial motion control systems requiring precise winding current management.
For engineers reviewing the UDQ2916EBTR datasheet, UDQ2916EBTR pinout, UDQ2916EBTR application, or UDQ2916EBTR equivalent, key selection considerations include its 44-pin PLCC package with internally fused batwing leads, thermal shutdown at 170°C, fixed off-time PWM control (e.g., 46 μs typical), low 1.8 V total saturation voltage at 500 mA, and compatibility with microprocessor-based half-step and micro-stepping drive formats.
Technical Context
The UDQ2916EBTR integrates two independent H-bridges, each with source/sink drivers, integrated clamp and flyback diodes, and logic-level PHASE, PWM, and current-select (I₀/I₁) inputs. Its monostable-based PWM current control uses external RC timing components (RT/CT) to set fixed off-time, enabling audible-noise suppression when configured for <46 μs off-times.
Each bridge supports independent current sensing via dedicated SENSE pins and reference voltage (VREF) input, with trip thresholds determined by VREF/RS ratio. Internal dead time (~2 μs) prevents shoot-through during PHASE transitions, and thermal protection disables all outputs at TJ = 170°C, re-enabling at 145°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 750 mA continuous per bridge - enables driving bipolar stepper windings or two DC motors without external current amplification. |
| Motor Supply Voltage | 45 V max - supports industrial 24 V and 36 V motor rails with margin for inductive kickback. |
| Output Saturation Voltage | <1.8 V total (source + sink) at 500 mA - reduces power loss and thermal load during sustained conduction. |
| Fixed Off-Time | 46 μs typical (RT = 56 kΩ, CT = 820 pF) - sets minimum current decay interval to maintain PWM frequency above audible range. |
| Thermal Shutdown Threshold | 170°C junction temperature - protects against latch-up or metallization failure under overload or poor heatsinking. |
| Operating Ambient Range | –40°C to +105°C (Range Q) - qualified for extended-temperature industrial and automotive under-hood environments. |
| Current Limit Selection | Digital I₀/I₁ inputs select 0%, 33%, 67%, or 100% of max current - enables torque-matched half-step sequencing and hold/start current modulation. |
Pinout & Package
The UDQ2916EBTR is housed in a 44-pin power PLCC (Package EB) with 11 internally fused leads per side and webbed batwing construction for enhanced thermal dissipation. Its leadframe is 100% matte tin plated and Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7–17, 29–39, 40, 41, 42, 43, 44 | Ground / Batwing Power Tab / NC | Pins 7–17 and 29–39 are internally fused batwing leads for thermal conduction; pins 1–6 and 40–44 are GND or NC - provides low-θJA path to PCB copper pour. |
| VBB (Pin 24) | Motor Supply Input | Accepts up to 45 V; requires ≥47 μF electrolytic decoupling close to pin to suppress switching transients. |
| VCC (Pin 23) | Logic Supply Input | 4.75–5.25 V logic rail; powers internal comparators, logic, and PWM circuitry. |
| SENSE1 / SENSE2 (Pins 15, 26) | Current Sense Inputs | Return nodes for external sense resistors RS1/RS2; must connect directly to device ground to avoid IR drop errors. |
| OUT1A / OUT1B / OUT2A / OUT2B (Pins 18, 19, 20, 21, 27, 28, 30, 31) | H-Bridge Outputs | Four high-current terminals per bridge; each pair drives one motor winding with bidirectional current capability. |
| PHASE1 / PHASE2 (Pins 11, 33) | Direction Control Inputs | Logic-level inputs setting current direction per bridge; internal ~2 μs dead time prevents shoot-through. |
| PWM1 / PWM2 (Pins 10, 34) | PWM Enable Inputs | Enable/disable PWM current chopping per bridge; high = active PWM mode. |
| I0 / I1 (Pins 9, 35) | Current Limit Select Inputs | Digital inputs selecting 0%/33%/67%/100% of max current - used for torque matching in multi-phase stepping. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Clamp & Flyback Diodes | Eliminates need for 8 external diodes per dual-H-bridge, reducing BOM count and board area while protecting against inductive kickback. |
| Internal Thermal Shutdown | Automatically disables all outputs at 170°C junction temperature and recovers at 145°C - prevents permanent damage during overload or inadequate heatsinking. |
| User-Configurable PWM Off-Time | External RT/CT network sets fixed off-time (e.g., 15–35 μs) to balance EMI, ripple, audible noise, and current regulation fidelity. |
| Low-Voltage Logic Interface | Compatible with 5 V microcontrollers; inputs accept 0.8 V low / 2.4 V high thresholds and draw <20 μA - simplifies direct MCU connection without level shifters. |
| Batwing PLCC Thermal Design | Internally fused leads on two sides provide 30°C/W θJA on multilayer board - enables 750 mA per bridge operation without external heatsink in moderate airflow. |
Applications
| Industrial Stepper Positioning | Lab Automation Stage Control |
|---|---|
|
Use Scenario: Precision open-loop positioning of X-Y stages in CNC milling fixtures and coordinate measuring machines using 1.8° bipolar stepper motors. IC Role / Device Role / Timing Role: Dual full-bridge driver executing half-step sequences with digitally modulated current per phase to maintain constant torque across step positions. Use Value: Enables smooth, vibration-free motion at 200–500 steps/sec using I₀/I₁ to switch between 100% (single-phase-on) and 67% (dual-phase-on) current levels - eliminating torque dip at intermediate positions. |
Use Scenario: Bidirectional actuation of syringe pumps and filter wheel mechanisms in analytical instruments requiring repeatable sub-microliter fluid dosing. IC Role / Device Role / Timing Role: Dual H-bridge controlling two independent DC motors - one for linear actuator advancement, another for rotary indexing. Use Value: Delivers 750 mA per channel at 24 V with <1.8 V saturation loss, minimizing self-heating during 100% duty-cycle hold phases and extending pump lifetime. |
| Embedded Motion in Test Equipment | Factory Floor Conveyor Indexing |
|
Use Scenario: Compact PCB-mounted motion subsystem in automated test handlers moving DUTs between probe stations and optical inspection zones. IC Role / Device Role / Timing Role: Stepper driver implementing micro-stepping via VREF modulation and fast current decay (I₀/I₁ = HH) during phase transitions. Use Value: Fixed 46 μs off-time ensures PWM frequency >20 kHz - eliminates audible whine in noise-sensitive lab environments while maintaining ±2% current regulation accuracy. |
Use Scenario: Indexing of palletized workpieces on programmable logic controller (PLC)-managed assembly lines using 42 mm NEMA-17 stepper motors. IC Role / Device Role / Timing Role: Dual bridge powering both motor windings with 45 V bus tolerance to accommodate line-voltage fluctuations and long cable runs. Use Value: 44-pin PLCC package with fused batwings allows direct soldering to 2 oz copper thermal pads - sustaining 750 mA per bridge at 60°C ambient without forced air. |
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 SOICW replacement; higher 1 A continuous current rating; integrated current-sense amplifier; no internal clamp diodes (requires external). | Requires external flyback diodes and sense resistor layout changes; supports higher torque loads but increases BOM and layout complexity. | Preferred for new designs needing higher current headroom and integrated diagnostics; not drop-in due to missing internal diodes and altered thermal pad requirements. |
| DRV8825PWPR | MSP430-compatible microstepping driver; 1.5 A max; integrated indexer; 3.3 V logic; no batwing thermal design; requires external VREF and current-sense resistors. | Targets low-voltage embedded systems; lacks industrial temp range (–40°C to +105°C); unsuitable for 45 V motor rails. | Only suitable for 3.3 V MCU-based designs with ≤36 V motor supply and microstepping requirement - not interchangeable for UDQ2916EBTR's industrial voltage/temp envelope. |
Compared with UDQ2916EBTR, the A4970 offers higher current and diagnostics but demands external protection diodes and revised thermal layout, while the DRV8825 targets lower-voltage microstepping applications with no industrial temperature or 45 V rating - neither serves as a direct replacement without system-level redesign.
Availability
UDQ2916EBTR is available at Aetrix Electronics and suitable for industrial motion control, lab automation equipment, and factory floor conveyor systems requiring stable component supply amid extended product lifecycles.
Supply support for UDQ2916EBTR 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 of high-performance magnetic sensors and precision power ICs, specializing in motion control, current sensing, and motor driver solutions for industrial and automotive markets.
The UDQ2916EBTR belongs to Allegro's legacy 2916 dual full-bridge family, engineered for robust bipolar stepper and dual-DC motor control in extended-temperature industrial environments with minimal external components.
FAQ
What is the maximum motor supply voltage supported by the UDQ2916EBTR?
The UDQ2916EBTR supports a maximum motor supply voltage (VBB) of 45 V. This rating is absolute and applies under all operating conditions including transient inductive kickback. Exceeding this voltage risks permanent damage to the internal output transistors and clamp diodes. The device is commonly deployed with 24 V or 36 V DC motor supplies to maintain safe margin during dynamic braking or back-EMF events.
Does the UDQ2916EBTR require external flyback diodes for inductive load protection?
No, the UDQ2916EBTR does not require external flyback diodes. It integrates internal clamp and flyback diodes for each output transistor, providing complete protection against inductive transients generated by stepper motor windings or DC motor coils. These diodes are rated for 750 mA continuous and 1 A peak, matching the device's output current capability.
How is current limiting configured on the UDQ2916EBTR?
Current limiting on the UDQ2916EBTR is configured using two methods: (1) analog - by setting VREF and external sense resistor RS to define ITRIP = VREF/(10 × RS), and (2) digital - by applying logic levels to I₀ and I₁ pins to select 0%, 33%, 67%, or 100% of that trip threshold. Both methods operate simultaneously, allowing fine-grained torque control in microprocessor-driven stepping sequences.
What thermal performance can be expected from the UDQ2916EBTR's 44-pin PLCC package?
The UDQ2916EBTR's Package EB has a measured θJA of 30°C/W on a multilayer PCB with adequate copper pour. With 750 mA per bridge and <1.8 V total saturation voltage, power dissipation remains below 2.7 W under full load, resulting in ~81°C junction rise above ambient - well within the 150°C absolute maximum. Adding 10 cm² of 2 oz copper connected to batwing leads further improves thermal margin.
Is the UDQ2916EBTR still in active production?
The UDQ2916EBTR is classified as Pre-End of Life per Allegro's November 1, 2010 status update. While not discontinued, it is approaching final Last Time Buy phase with limited remaining manufacturing windows. Aetrix Electronics maintains strategic inventory and supports legacy design continuity, but new designs should evaluate the A4970KLPTR-T as the recommended migration path.
UDQ2916EBTR 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:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.59x16.59)
UDQ2916EBTR FAQ
1.How can I place an order for UDQ2916EBTR through Aetrix?
Please submit a Request for Quotation (RFQ) for UDQ2916EBTR 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 UDQ2916EBTR reliable?
The price and inventory of UDQ2916EBTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UDQ2916EBTR is usually 5 days.
3.What payment methods are accepted for UDQ2916EBTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UDQ2916EBTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UDQ2916EBTR?
UDQ2916EBTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UDQ2916EBTR 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 UDQ2916EBTR?
For technical support, including UDQ2916EBTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UDQ2916EBTR requirements.
6.How does Aetrix verify that UDQ2916EBTR is sourced from the original manufacturer or authorized distributors?
All UDQ2916EBTR 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 UDQ2916EBTR meets industry standards.
7.What is the process for return or replacement of UDQ2916EBTR?
All UDQ2916EBTR units undergo pre-shipment inspection (PSI). If there is an issue with UDQ2916EBTR, 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 UDQ2916EBTR part is unused and in its original packaging.
Return procedure for UDQ2916EBTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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