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Texas Instruments UCC2626DW
- Part No.:
- UCC2626DW
- Manufacturer:
- Texas Instruments
- Category:
- Motor Drivers, Controllers
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
UCC2626DW.pdf
- Description:
- IC MOTOR DRIVER 11V-14.5V 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,496
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Product details
Overview
UCC2626DW from Texas Instruments is a three-phase brushless DC motor controller IC supporting two- and four-quadrant operation, featuring integrated absolute-value current sensing (gain = 5), precision tachometer output (variable duty-cycle, frequency-proportional), and PWM control with oscillator synchronization capability. It decodes Hall sensor inputs (HALLA/B/C) to drive six gate outputs (AHI/ALOW/BHI/BLOW/CHI/CLOW) for external power stages in industrial motion control systems.
For engineers reviewing the UCC2626DW datasheet, UCC2626DW pinout, UCC2626DW application, or UCC2626DW equivalent, key selection considerations include its –40°C to 85°C operating range, SOIC-28 package, 10.5 V UVLO start threshold, 9–11 kHz oscillator frequency (with CT = 1 nF, R_TACH = 250 kΩ), and differential current-sense amplifier with 8 mV input offset voltage.
Technical Context
The UCC2626DW implements Hall-based commutation decoding for 120°-spaced rotor position sensors, generating six synchronized high- and low-side drive signals. Its PWM logic supports both voltage-mode and current-mode control via configurable comparator inputs (PWM_I/PWM_NI) and selectable QUAD mode (two- vs. four-quadrant).
It integrates a 5-V trimmed reference (±2% accuracy), triangle-wave oscillator (CT pin, 2.5–7.5 V swing), monostable tachometer (TACH_OUT, on-time set by R_TACH/C_TACH), and direction detection (DIR_IN/DIR_OUT) with hysteresis on all logic inputs (1.4 V low, 3.6 V high thresholds).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating temperature | –40°C to +85°C - qualified for industrial motor control environments without derating. |
| Oscillator frequency | 9.0–11.0 kHz at VDD = 12 V, CT = 1 nF, R_TACH = 250 kΩ - sets base PWM switching rate for torque ripple and EMI trade-offs. |
| Current sense gain | 5.00 V/V ±1.5% - enables direct reconstruction of motor phase current magnitude for overcurrent protection and closed-loop current control. |
| Tachometer output | Variable duty-cycle square wave - frequency proportional to RPM, on-time programmable via R_TACH/C_TACH for digital or analog speed feedback. |
| UVLO start threshold | 10.5 V typical - prevents erratic startup or partial operation during brown-out conditions in 12-V supply systems. |
| Output drive capability | ±200 mA per AHI/ALOW/BHI/BLOW/CHI/CLOW - sufficient to directly drive gate drivers (e.g., IR2110) without level-shifting buffers. |
| Input offset voltage (sense amp) | 8 mV max - limits current measurement error to ≤0.16% of full-scale sense voltage at 5× gain. |
Pinout & Package
UCC2626DW is housed in a 28-pin SOIC (DW) package, 17.9 mm × 7.5 mm body, 1.27 mm pitch, with GND pin (1) and VDD pin (28) positioned for optimal power/ground decoupling. Pin 1 is marked with a beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (1) | Power ground reference | Primary return path for all internal circuits; must be connected to low-impedance system ground near bypass capacitors. |
| VREF (2) | 5-V precision reference output | Stable 4.9–5.1 V source (2% tolerance) used to bias Hall sensors and external circuitry; requires ≥0.1 µF ceramic bypass. |
| TACH_OUT (3) | Tachometer pulse output | Open-drain variable-duty-cycle signal; frequency ∝ motor RPM; on-time set by R_TACH/C_TACH for speed loop implementation. |
| R_TACH (4) | Tachometer timing resistor connection | Sets charge current for C_TACH and oscillator frequency; 25–500 kΩ range recommended for stable operation. |
| C_TACH (5) | Tachometer timing capacitor connection | Charged by R_TACH current to set TACH_OUT pulse width; must be placed close to pin with direct ground connection. |
| CT (6) | Oscillator timing capacitor node | Triangle waveform node (2.5–7.5 V swing); drives PWM comparator; requires low-ESR capacitor tied directly to GND. |
| SYNCH (7) | External oscillator sync input | Positive-edge-triggered; enables master-slave synchronization when used with parallel R_TACH resistor on CT. |
| DIR_OUT (8) | Decoded rotor direction output | Digital signal indicating clockwise/counterclockwise rotation derived from HALLA/B/C transitions; matches DIR_IN polarity during motoring. |
| SNS_NI (9) | Current sense non-inverting input | High-impedance input to differential amplifier; used with SNS_I to measure bidirectional motor current magnitude. |
| SNS_I (10) | Current sense inverting input | Paired with SNS_NI; absolute-value output (IOUT) reconstructs true motor current regardless of quadrant. |
| IOUT (11) | Reconstructed current output | Analog representation of |ISNS_I − ISNS_NI| × 5; feeds current control loops or overcurrent comparators (OC_REF referenced). |
| OC_REF (12) | Overcurrent trip threshold | Analog input setting comparator threshold for pulse-by-pulse current limiting; referenced to IOUT for fast fault response. |
| PWM_I (13) | PWM comparator inverting input | Accepts current or voltage error signal; compared against triangle waveform on CT to generate PWM duty cycle. |
| PWM_NI (14) | PWM comparator non-inverting input | Connected to CT for standard voltage-mode PWM; alternative use enables current-mode control with slope compensation. |
| VDD (15) | Supply voltage input | 12-V nominal operation; UVLO disables outputs below 10.5 V; requires ≥0.1 µF ceramic bypass capacitor. |
| AHI (16) | Phase A high-side gate drive | Digital output controlling upper MOSFET/IGBT in phase A leg; sinks/source ±200 mA for direct driver interfacing. |
| ALOW (17) | Phase A low-side gate drive | Digital output controlling lower switch in phase A; active during brake (BRAKE = high) and normal commutation. |
| BHI (18) | Phase B high-side gate drive | Commutation-controlled output for phase B upper switch; timing follows Hall decoder truth table (Table 1). |
| BLOW (19) | Phase B low-side gate drive | Commutation-controlled output for phase B lower switch; disabled only during UVLO, overcurrent, or COAST. |
| CHI (20) | Phase C high-side gate drive | Third high-side output; complements AHI/BHI to complete three-phase 120° sequencing. |
| CLOW (21) | Phase C low-side gate drive | Third low-side output; works with CHI to enable full bridge control in four-quadrant mode (QUAD = 1). |
| DIR_IN (22) | Direction command input | Logic-level input selecting forward/reverse commutation sequence; determines HALL decoding order per Table 1. |
| QUAD (23) | Quadrant selection input | Low = two-quadrant (low-side PWM only); high = four-quadrant (full-bridge PWM); critical for braking and reversal safety. |
| BRAKE (24) | Brake mode activation | Active-high input forcing all low-side switches ON and high-side OFF; maintains TACH_OUT functionality during dynamic braking. |
| COAST (25) | Coast mode activation | Hysteretic comparator input (1.6–2.0 V threshold); disables all outputs above 1.75 V to implement bus overvoltage clamp. |
| HALLC (26) | Rotor position sensor C input | One of three 120°-spaced Hall inputs; internally pulled up to VREF; requires RC filtering per Figure 2 for noise immunity. |
| HALLB (27) | Rotor position sensor B input | Second Hall input; decoded with HALLA/HALLC to determine commutation state and direction; hysteresis ≥0.6 V. |
| HALLA (28) | Rotor position sensor A input | First Hall input; forms 3-bit position code with HALLB/HALLC; invalid states (all high/low) force zero output per Table 1. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Hall decoder with direction detection | Directly interprets 120° Hall codes into six gate outputs and DIR_OUT signal-eliminates need for external logic or microcontroller-based commutation. |
| Four-quadrant PWM modulation control | QUAD-selectable architecture modulates both high- and low-side switches simultaneously-enables controlled regeneration and safe torque reversal without circulating currents. |
| Reconstructed motor current output (IOUT) | Combines differential sense amplifier (5× gain) and absolute-value circuit to deliver continuous analog current magnitude-supports pulse-by-pulse overcurrent protection and inner current loop closure. |
| Programmable tachometer with monostable | TACH_OUT pulse width set independently via R_TACH/C_TACH-enables precise speed feedback resolution for digital (microcontroller) or analog (RC-filtered) velocity loops. |
| Synchronized oscillator with external clock input | SYNCH pin accepts TTL/CMOS clock edges to align CT triangle waveform across multiple controllers-reduces system-level EMI and simplifies multi-axis timing coordination. |
| Trimmed 5-V reference with 5 mA drive | Stable, low-drift VREF output powers Hall sensors and external circuitry-reduces BOM count and improves sensor bias accuracy versus discrete references. |
Applications
| Industrial Servo Drives | Electric Power Steering (EPS) |
|---|---|
|
Use Scenario: Closed-loop position/speed control of PMSM or BLDC motors in CNC axes, packaging machinery, and robotic joints requiring smooth torque delivery and rapid acceleration/deceleration. IC Role / Device Role / Timing Role: Primary commutation controller decoding Hall signals, generating synchronized PWM for gate drivers, and providing tach feedback for velocity loop stability. Use Value: Four-quadrant operation enables regenerative braking and precise reversal-critical for dynamic load handling and energy recovery in servo systems. |
Use Scenario: Motor assist control in automotive EPS systems where compact size, functional safety, and fail-safe braking are mandatory under ASIL-B requirements. IC Role / Device Role / Timing Role: Real-time Hall decoding and dual-mode (QUAD-selectable) PWM generation ensure responsive torque assist while supporting coast/brake commands for fault mitigation. Use Value: Integrated current sensing and tachometer reduce external components-improving reliability and easing ISO 26262 diagnostic coverage for motor current and speed monitoring. |
| Medical Infusion Pumps | Automated Guided Vehicles (AGVs) |
|
Use Scenario: Precise, low-noise fluid delivery in hospital-grade infusion pumps using small BLDC motors with Hall-effect position feedback. IC Role / Device Role / Timing Role: Generates clean, jitter-free commutation signals and provides filtered TACH_OUT for microcontroller-based flow calibration and occlusion detection. Use Value: Low input offset (8 mV) and stable oscillator minimize speed ripple-ensuring accurate volumetric dosing within ±1% accuracy over temperature. |
Use Scenario: Drive control for traction motors in battery-powered AGVs navigating warehouses and logistics centers with frequent starts/stops and directional changes. IC Role / Device Role / Timing Role: Manages bidirectional motor control via DIR_IN/DIR_OUT, executes brake mode (BRAKE pin), and delivers tach feedback for navigation speed regulation. Use Value: COAST input enables bus voltage clamping during regenerative braking-protecting 24/48-V battery systems from overvoltage transients during deceleration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar brushless DC motor controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC3626DW | Same pinout and functional block diagram, but rated for 0°C to 70°C ambient-lacks extended industrial temperature qualification. | Targeted at commercial-grade equipment (e.g., office automation, consumer appliances) rather than harsh industrial environments. | Select UCC3626DW only if operating temperature remains within 0–70°C and cost sensitivity outweighs thermal margin requirements. |
| DRV8301 | Integrated gate drivers + current shunt amplifiers in 32-pin HTSSOP; no Hall decoder or tach output-requires external MCU for commutation logic. | Used in high-current (>10 A), high-efficiency systems where space-constrained PCBs favor integration over discrete control + driver separation. | Choose DRV8301 when system already includes a capable MCU for Hall decoding and tach processing, and higher current drive (1.5 A peak) is needed. |
Compared with UCC3626DW and DRV8301, the UCC2626DW uniquely combines Hall decoding, tach generation, and quadrature-selectable PWM in a single SOIC-28 package-making it optimal for cost-sensitive, MCU-offloaded BLDC systems requiring industrial temperature range and minimal external components.
Availability
UCC2626DW is available at Aetrix Electronics and suitable for industrial servo drives, electric power steering modules, medical infusion pumps, and automated guided vehicle motor control requiring stable component supply across extended temperature ranges.
Supply support for UCC2626DW 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies with decades of motor control IP investment.
The UCC2626DW belongs to TI's legacy UCC3626 family of Hall-based BLDC controllers, designed specifically for cost-effective, high-reliability three-phase motor control in industrial and automotive subsystems without requiring external microcontrollers.
FAQ
What is the operating temperature range of the UCC2626DW?
The UCC2626DW is specified for operation from –40°C to +85°C ambient temperature. This industrial-grade range ensures reliable performance in demanding environments such as factory automation, HVAC blowers, and outdoor robotics where thermal cycling occurs. The device incorporates undervoltage lockout that disables outputs below 10.5 V to prevent malfunction during cold-start conditions.
How does the UCC2626DW implement four-quadrant motor control?
The UCC2626DW achieves four-quadrant control via the QUAD input pin: when QUAD = 1, both high-side (AHI/BHI/CHI) and low-side (ALOW/BLOW/CLOW) outputs are modulated by the PWM comparator, enabling controlled regeneration and torque reversal. This eliminates uncontrolled circulating currents seen in two-quadrant mode and allows safe operation in quadrants II and IV where torque opposes rotation.
Can the UCC2626DW synchronize its oscillator to an external clock?
Yes, the UCC2626DW supports oscillator synchronization through the SYNCH pin. A positive-going edge on SYNCH forces the CT node to begin discharging, aligning the internal triangle waveform with a master clock. For proper locking, the internal oscillator must be programmed to a frequency slightly lower than the master, and a resistor equal to R_TACH must be placed in parallel with CT.
What is the function of the IOUT pin on the UCC2626DW?
The IOUT pin on the UCC2626DW delivers the output of the integrated differential current-sense amplifier and absolute-value circuit: IOUT = |SNS_I − SNS_NI| × 5. This reconstructed analog signal represents true motor phase current magnitude regardless of direction-enabling pulse-by-pulse overcurrent protection and closed-loop current control without external op-amps or rectifiers.
Does the UCC2626DW require external components for Hall sensor interfacing?
Yes, the UCC2626DW requires external passive RC filters on HALLA, HALLB, and HALLC pins to suppress noise-induced false commutation. TI recommends 1 kΩ series resistors and 2.2 nF capacitors placed close to the device, with pull-up to VREF. For 60° Hall sensors, an external conversion circuit (e.g., Figure 1) is needed to generate compatible 120° encoding before connecting to the UCC2626DW.
UCC2626DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- Brushless DC (BLDC)
- Function:
- Controller - Commutation, Direction Management
- Output Configuration:
- Pre-Driver - Half Bridge (3)
- Interface:
- PWM
- Technology:
- -
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- -
- Voltage - Supply:
- 11V ~ 14.5V
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOIC
UCC2626DW FAQ
1.How can I place an order for UCC2626DW through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC2626DW 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 UCC2626DW reliable?
The price and inventory of UCC2626DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC2626DW is usually 5 days.
3.What payment methods are accepted for UCC2626DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC2626DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC2626DW?
UCC2626DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC2626DW 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 UCC2626DW?
For technical support, including UCC2626DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC2626DW requirements.
6.How does Aetrix verify that UCC2626DW is sourced from the original manufacturer or authorized distributors?
All UCC2626DW 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 UCC2626DW meets industry standards.
7.What is the process for return or replacement of UCC2626DW?
All UCC2626DW units undergo pre-shipment inspection (PSI). If there is an issue with UCC2626DW, 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 UCC2626DW part is unused and in its original packaging.
Return procedure for UCC2626DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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