My Inquiry
My Account
Allegro MicroSystems UDQ2916LB
- Part No.:
- UDQ2916LB
- Manufacturer:
- Allegro MicroSystems
- Category:
- Motor Drivers, Controllers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
UDQ2916LB.pdf
- Description:
- IC MOTOR DRIVER BIPOLAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,896
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
UDQ2916LB 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, 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. It is used in precision motion control systems requiring compact, thermally robust motor interface.
For engineers reviewing the UDQ2916LB datasheet, UDQ2916LB pinout, UDQ2916LB application, or UDQ2916LB equivalent, this page provides verified technical context, real-world design meaning of specifications, validated alternative options, and supply guidance for legacy design support and controlled end-of-life transition planning.
Technical Context
The UDQ2916LB integrates two independent H-bridge drivers with internal clamp and flyback diodes, fixed off-time PWM current control (46 μs typical), and thermal shutdown at 170°C. Each bridge uses external sense resistor (RS) and reference voltage (VREF) to set peak current via ITRIP = VREF/10RS, with digital current scaling enabled by I0/I1 logic inputs.
It employs internally generated dead time (~2 μs) to prevent shoot-through during PHASE switching, supports fast current decay via all-driver disable (I0=I1=high), and requires no special power-up sequencing. The LB package's batwing leads provide enhanced thermal dissipation (θJA = 55°C/W on single-layer board).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 750 mA continuous per bridge - enables direct drive of medium-torque stepper windings without external current amplification. |
| Motor Supply Voltage | 45 V max - supports industrial 24 V and 36 V DC bus systems with margin for inductive kickback. |
| Output Saturation Voltage | ≤1.5 V total (source + sink) at 750 mA - minimizes conduction loss and heat generation under full load. |
| PWM Fixed Off-Time | 46 μs typical (RT=56 kΩ, CT=820 pF) - ensures current chopping above audible range while enabling stable low-current regulation. |
| Junction Temp Limit | 170°C shutdown / 145°C recovery - provides fail-safe thermal protection without latch-up, allowing automatic recovery after cooling. |
| Ambient Range | –40°C to +105°C (Range Q) - qualified for automotive under-hood and industrial control cabinet environments. |
| Logic Supply | VCC = 4.75–5.25 V - compatible with standard 5 V microcontroller I/O without level shifting. |
Pinout & Package
The UDQ2916LB is supplied in a 24-pin wide SOIC (SOICW) package with two pairs of fused batwing leads (Pins 6, 7, 18, 19) acting as thermal tabs for enhanced power dissipation. Package outline conforms to JEDEC MS-013 AD; body dimensions are 15.40 mm × 10.30 mm × 2.65 mm max.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 | Ground / Logic / Sense / Control | Pins 1–4, 11–12: GND (logic return); Pins 5–6, 10–11: SENSE1/SENSE2 (current sensing inputs); Pin 9: VREF1 (reference for Bridge 1) |
| 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 | Power / Output / Control | Pins 13–14: OUT1A/OUT1B (Bridge 1 H-bridge outputs); Pins 15–16: E1/PHASE1 (emitter & direction); Pins 17–18: VBB (motor supply); Pins 19–20: VCC (logic supply); Pins 21–22: I0/I1 (digital current select); Pins 23–24: PWM1/PWM2 (external PWM enable) |
Key Features
| Feature | Design Value |
|---|---|
| Internal PWM current control | Eliminates need for external PWM generator; enables precise, adjustable peak current setting using VREF and RS without microcontroller intervention. |
| Dual independent H-bridges | Allows simultaneous control of two DC motors or full bipolar stepper phase winding pairs with separate PHASE and current scaling per bridge. |
| Digital current scaling (I0/I1) | Provides four discrete current levels (0%, 33%, 67%, 100%) - essential for half-step torque matching and hold/start current optimization in stepper systems. |
| Integrated clamp/flyback diodes | Reduces BOM count and PCB area; handles inductive energy recirculation during current decay without external diode placement or layout sensitivity. |
| Batwing SOICW thermal design | Enables 750 mA continuous operation per bridge at 105°C ambient when mounted on ≥6 cm² copper pour - critical for space-constrained industrial drives. |
Applications
| Industrial CNC Positioning | Automotive HVAC Actuators |
|---|---|
|
Use Scenario: Precise open-loop positioning of linear actuators in CNC tool changers and axis micro-adjustment stages. IC Role / Device Role / Timing Role: Dual full-bridge driver executing microprocessor-commanded half-step sequences with synchronized current scaling per phase. Use Value: Maintains constant torque across 8-step sequence via I0/I1-controlled 100% (single-phase) and 67% (dual-phase) current levels, eliminating position error from torque imbalance. |
Use Scenario: Bidirectional control of damper motors in vehicle climate control systems operating across extended temperature ranges. IC Role / Device Role / Timing Role: Motor driver interfacing directly with 5 V MCU GPIOs, managing PHASE, PWM, and I0/I1 signals for directional and torque-modulated actuation. Use Value: –40°C to +105°C qualification and integrated thermal shutdown ensure reliable operation in under-dash environments subject to thermal cycling and vibration. |
| Medical Infusion Pumps | Lab Automation Sample Handlers |
|
Use Scenario: Low-noise, repeatable stepper-driven syringe advancement in portable infusion devices. IC Role / Device Role / Timing Role: Current-regulated dual-bridge driver delivering smooth micro-stepping via VREF adjustment and fixed off-time PWM. Use Value: 46 μs fixed off-time ensures current chopping >20 kHz, eliminating audible motor whine while maintaining sub-microliter dosing accuracy. |
Use Scenario: High-reliability robotic arm joint control in automated PCR workstations and plate handlers. IC Role / Device Role / Timing Role: Dual H-bridge motor interface supporting rapid direction reversal and fast current decay during indexing moves. Use Value: All-driver disable (I0=I1=high) enables fast current decay through internal diodes, reducing step-to-step settling time by >30% vs. passive decay. |
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 per bridge, integrated current sense amplifier, SPI interface, 5–40 V supply - replaces UDQ2916LB with enhanced integration and diagnostics. | Requires SPI host controller and revised firmware; supports closed-loop current monitoring not available in UDQ2916LB. | Recommended for new designs needing higher current, diagnostic capability, or digital configurability; not pin-compatible. |
| DRV8825PWPR | Microstepping up to 1/32, integrated indexer, 2.2 A per bridge, 8.2–45 V supply - adds step/direction interface and advanced decay modes. | Eliminates need for external microstepping logic but requires different control signal architecture (STEP/DIR vs. PHASE/PWM/I0/I1). | Preferred for new stepper-centric designs requiring high-resolution microstepping and simplified MCU interface; not functionally drop-in. |
Compared with UDQ2916LB, the A4970 offers higher current and digital configurability at the cost of increased system complexity, while the DRV8825 provides superior microstepping resolution and integrated indexing but mandates redesign of control logic and layout - neither is pin- or code-compatible.
Availability
UDQ2916LB is available at Aetrix Electronics and suitable for industrial motion control, automotive HVAC actuation, and medical infusion pump designs requiring stable component supply during pre-end-of-life transition phases.
Supply support for UDQ2916LB 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 UDQ2916LB belongs to Allegro's legacy 2916 dual full-bridge motor driver family, engineered specifically for cost-sensitive, thermally demanding stepper and dual-DC motor applications in industrial and automotive subsystems.
FAQ
What is the operating temperature range for the UDQ2916LB?
The UDQ2916LB is rated for operation from –40°C to +105°C (Range Q), making it suitable for under-hood automotive applications and industrial control cabinets where ambient temperatures exceed standard commercial grade limits. This rating is confirmed in the Absolute Maximum Ratings table and applies specifically to the LB package variant with batwing leads.
Does the UDQ2916LB support microstepping?
The UDQ2916LB does not implement hardware microstepping; however, it supports microstepping via external PWM modulation of the VREF input and precise timing control of PHASE and I0/I1 signals. Its fixed off-time PWM architecture and analog current threshold allow variable current levels between steps, enabling software-based microstepping implementations when paired with a capable microcontroller.
Is the UDQ2916LB pin-compatible with other 2916-series packages like UDN2916B or UDN2916EB?
No - the UDQ2916LB (24-pin SOICW) has a different pinout than the UDN2916B (24-pin DIP) and UDN2916EB (44-pin PLCC). While functional roles are consistent across the family, physical pin assignments differ significantly; for example, VCC appears on Pin 19 in LB but Pin 20 in B-package, and ground pins are distributed differently. Direct PCB replacement is not possible without layout revision.
What is the maximum continuous output current per bridge for the UDQ2916LB?
The UDQ2916LB supports 750 mA continuous output current per bridge under specified thermal conditions (TA ≤ 105°C, with adequate PCB copper pour on batwing leads). This value is explicitly stated in the "Description" section and confirmed in the Absolute Maximum Ratings table as "Continuous" current, distinct from the 1.0 A peak rating which applies only under short-duration, duty-cycle-limited conditions.
How does the UDQ2916LB handle thermal overload?
The UDQ2916LB incorporates thermal shutdown circuitry that disables all output drivers when junction temperature reaches 170°C, and automatically re-enables them once the junction cools to 145°C. This hysteresis prevents oscillation and protects against sustained overtemperature events. The thermal response is intrinsic to the die and independent of external components, ensuring robustness even in unmonitored systems.
UDQ2916LB 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:
- 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
UDQ2916LB FAQ
1.How can I place an order for UDQ2916LB through Aetrix?
Please submit a Request for Quotation (RFQ) for UDQ2916LB 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 UDQ2916LB reliable?
The price and inventory of UDQ2916LB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UDQ2916LB is usually 5 days.
3.What payment methods are accepted for UDQ2916LB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UDQ2916LB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UDQ2916LB?
UDQ2916LB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UDQ2916LB 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 UDQ2916LB?
For technical support, including UDQ2916LB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UDQ2916LB requirements.
6.How does Aetrix verify that UDQ2916LB is sourced from the original manufacturer or authorized distributors?
All UDQ2916LB 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 UDQ2916LB meets industry standards.
7.What is the process for return or replacement of UDQ2916LB?
All UDQ2916LB units undergo pre-shipment inspection (PSI). If there is an issue with UDQ2916LB, 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 UDQ2916LB part is unused and in its original packaging.
Return procedure for UDQ2916LB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UDQ2916LB 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…
