My Inquiry
My Account
Allegro MicroSystems UDQ2916EB
.jpg)
- Part No.:
- UDQ2916EB
- Manufacturer:
- Allegro MicroSystems
- Category:
- Motor Drivers, Controllers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
UDQ2916EB.pdf
- Description:
- IC MOTOR DRIVER BIPOLAR 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,940
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
UDQ2916EB 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 voltage, 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. It operates across –40°C to +105°C and is used in industrial motion control systems requiring precise microstepping and thermal robustness.
For engineers reviewing the UDQ2916EB datasheet, UDQ2916EB pinout, UDQ2916EB application, or UDQ2916EB 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 typical), and thermal shutdown at 170°C junction temperature.
Technical Context
The UDQ2916EB implements two independent H-bridge outputs with internal pulse-width modulation current regulation using external RC timing components (RT/CT) and a user-defined reference voltage (VREF). Each bridge uses a monostable multivibrator to generate fixed off-time (toff ≈ RT × CT), enabling current chopping above audible frequencies.
Logic-level PHASE inputs determine current direction per bridge, while I0/I1 digital inputs select discrete current thresholds (100%, 67%, 33%, or 0%) by scaling VREF/RS. Internal dead time (~2 μs) prevents shoot-through during PHASE transitions, and thermal shutdown disables all drivers at TJ = 170°C, re-enabling at 145°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Motor Supply Voltage | 45 V max - supports high-voltage stepper and DC motor loads without external boost or clamping. |
| Continuous Output Current | 750 mA per bridge - enables driving NEMA 17–23 stepper motors at full torque in compact designs. |
| Output Saturation Voltage | <1.8 V total (source + sink) at 500 mA - minimizes conduction loss and self-heating under sustained load. |
| Fixed Off-Time | 46 μs typical (RT = 56 kΩ, CT = 820 pF) - ensures PWM frequency >21 kHz to avoid audible noise and enable stable current regulation. |
| Junction Temperature Limit | 170°C shutdown / 145°C recovery - provides fail-safe thermal protection without requiring external sensors or firmware intervention. |
| Operating Ambient Range | –40°C to +105°C (Range Q) - qualified for industrial and automotive under-hood environments. |
| Reference Voltage Range | 1.5 V to 7.5 V - allows fine-grained microstepping current control via analog VREF adjustment. |
Pinout & Package
The UDQ2916EB 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), forming webbed batwing terminals for maximum power dissipation in minimal PCB area. Thermal resistance θJA = 30°C/W (measured on single-layer board with 1 sq. in. 2 oz copper).
| 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 low-thermal-resistance paths to substrate - serve as primary heat-sinking interface and return for motor current. |
| VBB (Pin 24) | Motor Supply Input | High-current input for 10–45 V motor bus; requires ≥47 μF local electrolytic decoupling. |
| VCC (Pin 23) | Logic Supply Input | 4.75–5.25 V logic rail; powers internal comparators, logic, and reference circuitry. |
| PHASE1 / PHASE2 (Pins 11, 31) | Bridge Direction Control | Digital inputs defining current polarity per H-bridge; internally debounced with ~2 μs dead time. |
| I0 / I1 (Pins 12, 32) | Current Limit Selection | Logic-level inputs selecting 0%, 33%, 67%, or 100% of VREF/RS trip threshold - enables microprocessor-driven torque scaling. |
| OUT1A / OUT1B / OUT2A / OUT2B (Pins 14–16, 26–28) | H-Bridge Outputs | Four high-side/low-side driver terminals; each pair drives one motor winding with integrated clamp/flyback diodes. |
| SENSE1 / SENSE2 (Pins 18, 25) | Current Sense Inputs | Low-impedance differential sense nodes tied to external RS resistors - require dedicated ground return to avoid IR error. |
| VREF1 / VREF2 (Pins 19, 22) | Reference Voltage Inputs | Analog inputs setting peak current threshold (ITRIP = VREF/10RS); support filtering capacitor for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent PWM current control | Each bridge regulated separately via dedicated VREF, SENSE, RC timing - enables asymmetric microstepping and phase-torque balancing. |
| Integrated clamp and flyback diodes | Eliminates need for 8 external diodes; reduces BOM count and layout area while ensuring safe inductive energy recirculation. |
| Logic-selectable current levels | I0/I1 inputs provide four discrete torque states without MCU GPIO expansion - simplifies half-step sequencing and hold/start current management. |
| Batwing-fused PLCC thermal design | 44-pin EB package achieves θJA = 30°C/W - delivers 2× power handling vs. SOICW (LB) and 3× vs. DIP (B) under identical PCB conditions. |
| Thermal shutdown with hysteresis | Auto-recovery at 145°C after 170°C trip - prevents latch-up and enables graceful degradation in overload or poor heatsinking scenarios. |
Applications
| Industrial Stepper Positioning | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Precision open-loop positioning of X-Y stages in CNC milling accessories and lab automation platforms. IC Role / Device Role / Timing Role: Dual full-bridge driver executing microstepped current profiles with real-time I0/I1 torque scaling per step position. Use Value: Enables 1/8-step resolution and consistent holding torque across ambient temperatures from –40°C to +105°C without external current sensing amplifiers. |
Use Scenario: Actuating solenoid valves and small DC actuators in modular ATE rack controllers with shared 24 V supply rails. IC Role / Device Role / Timing Role: Bidirectional dual-motor driver managing simultaneous valve sequencing and fixture movement via PHASE/I0/I1 logic control. Use Value: Reduces system component count by integrating 4x power switches, 8x flyback diodes, and PWM timing into one 44-pin PLCC - saving >12 mm² PCB area vs. discrete solutions. |
| Medical Infusion Pumps | Print Head Carriage Control |
Use Scenario: Driving bipolar stepper motors in portable infusion pumps requiring silent operation and reliable stall detection. IC Role / Device Role / Timing Role: Current-regulated motor driver implementing fixed off-time PWM at 46 μs to maintain >21 kHz switching frequency and eliminate audible whine. Use Value: Achieves quiet motor operation while maintaining ±5% current accuracy across battery voltage droop (10–45 V), critical for dosage consistency. |
Use Scenario: Controlling bi-directional print head carriage in wide-format inkjet plotters with rapid acceleration/deceleration demands. IC Role / Device Role / Timing Role: Dual H-bridge delivering 750 mA peak current per phase with fast decay enabled by I0/I1 = HIGH during direction reversal. Use Value: Supports 200+ steps/sec carriage motion with <10 μs current decay time - minimizing positional overshoot and improving print registration accuracy. |
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 |
|---|---|---|---|
| A4970 | Higher 2.5 A per bridge rating; integrated current sense amplifier; SPI interface; no internal clamp diodes. | Requires external flyback diodes but supports closed-loop current feedback and programmable decay modes (slow/fast/mixed). | Preferred for new designs needing higher current, digital configurability, or adaptive decay control - not pin-compatible with UDQ2916EB. |
| UDN2916LBTR-T2 | Same core architecture and electrical specs; 24-pin batwing SOICW package; θJA = 55°C/W; rated for –40°C to +105°C. | Limited thermal capacity vs. EB package - suitable only for lower-duty-cycle or forced-air-cooled applications. | Valid drop-in alternative where PCB space permits SOICW footprint and power dissipation ≤1.8 W is acceptable. |
Compared with UDQ2916EB, the A4970 offers greater current capability and digital control at the cost of increased BOM complexity and layout overhead, while the UDN2916LBTR-T2 shares functional equivalence but trades 40% lower thermal performance for surface-mount compatibility - making UDQ2916EB the optimal choice for high-power-density, thermally constrained stepper systems.
Availability
UDQ2916EB is available at Aetrix Electronics and suitable for industrial motion control, medical device actuation, automated test equipment, and precision printing applications requiring stable component supply and long-term lifecycle support.
Supply support for UDQ2916EB 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, specializing in magnetic sensing and motion control solutions since 1989.
The UDQ2916EB belongs to Allegro's legacy 2916 dual full-bridge family, engineered specifically for cost-sensitive, thermally demanding stepper and DC motor applications in industrial and instrumentation markets - emphasizing integration, reliability, and ease of analog current tuning.
FAQ
What is the maximum continuous output current supported by the UDQ2916EB?
The UDQ2916EB supports 750 mA continuous output current per bridge under specified thermal conditions (θJA = 30°C/W, TA ≤ +105°C). This rating assumes proper PCB copper area (≥6 cm² connected to batwing leads) and operation within the –40°C to +105°C ambient range. Peak current capability reaches 1.0 A, but duration must be limited to avoid exceeding TJ(max) = 150°C.
Does the UDQ2916EB require external flyback diodes for inductive load protection?
No, the UDQ2916EB integrates clamp and flyback diodes for each output transistor, eliminating the need for eight external diodes. These internal diodes handle inductive energy recirculation during PWM off-time and PHASE reversal, reducing bill-of-materials count and PCB footprint while maintaining safe voltage clamping up to 45 V.
How does the UDQ2916EB implement PWM current control without a microcontroller?
The UDQ2916EB uses an internal monostable multivibrator and comparator to generate fixed off-time PWM autonomously. When sensed current (via external RS resistor) reaches VREF/10RS, the comparator triggers the monostable, turning off the source driver for a duration set by RT × CT. This cycle repeats, regulating average winding current without MCU involvement - though I0/I1 logic inputs allow digital torque scaling.
What is the purpose of the batwing leads in the UDQ2916EB's PLCC package?
The batwing leads (pins 7–17 and 29–39) in the UDQ2916EB's 44-pin PLCC package are internally fused to the die substrate and serve as primary thermal conduction paths. Their webbed construction maximizes copper cross-section and solder joint area, achieving θJA = 30°C/W - significantly lower than SOICW (55°C/W) or DIP (40°C/W) variants - enabling higher continuous power dissipation in space-constrained layouts.
Is the UDQ2916EB still in active production, and what is its lifecycle status?
The UDQ2916EB is currently in Pre-End of Life status per Allegro's November 1, 2010 notification. While still available through authorized channels including Aetrix Electronics, it is approaching final Last Time Buy phase. Customers are advised to plan for migration to the A4970 for new designs, though UDQ2916EB remains fully supported for legacy system maintenance and repair.
UDQ2916EB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 44-LCC (J-Lead)
- 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:
- 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)
UDQ2916EB FAQ
1.How can I place an order for UDQ2916EB through Aetrix?
Please submit a Request for Quotation (RFQ) for UDQ2916EB 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 UDQ2916EB reliable?
The price and inventory of UDQ2916EB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UDQ2916EB is usually 5 days.
3.What payment methods are accepted for UDQ2916EB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UDQ2916EB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UDQ2916EB?
UDQ2916EB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UDQ2916EB 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 UDQ2916EB?
For technical support, including UDQ2916EB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UDQ2916EB requirements.
6.How does Aetrix verify that UDQ2916EB is sourced from the original manufacturer or authorized distributors?
All UDQ2916EB 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 UDQ2916EB meets industry standards.
7.What is the process for return or replacement of UDQ2916EB?
All UDQ2916EB units undergo pre-shipment inspection (PSI). If there is an issue with UDQ2916EB, 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 UDQ2916EB part is unused and in its original packaging.
Return procedure for UDQ2916EB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UDQ2916EB Tags
-
DRV2603RUNR
Texas Instruments
-
DRV8837CDSGR
Texas Instruments
-
DRV8837DSGR
Texas Instruments
-
DRV8838DSGR
Texas Instruments
-
DRV8839DSSR
Texas Instruments
-
EMC2301-1-ACZL-TR
Microchip Technology
-
DRV8231ADSGR
Texas Instruments
-
EMC2302-2-AIZL-TR
Microchip Technology
-
DRV8800PWPR
Texas Instruments
-
DRV8835DSSR
Texas Instruments
-
EMC2303-1-KP-TR
Microchip Technology
-
DRV8876PWPR
Texas Instruments
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
