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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Motor Drivers, Controllers

Texas Instruments UCC3626DW

Name: UCC3626DW
Brand: Texas Instruments
SKU: UCC3626DW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: UCC3626DW

Manufacturer:: Texas Instruments

Category:: Motor Drivers, Controllers

Package:: 28-SOIC (0.295", 7.50mm Width)

Datasheet:: UCC3626DW.pdf

Description:: IC MOTOR DRIVER 11V-14.5V 28SOIC

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Product details

Overview

UCC3626DW from Texas Instruments is a dedicated three-phase brushless DC motor controller IC supporting two- and four-quadrant operation. It integrates a precision triangle oscillator (10 kHz typ), differential current-sense amplifier (gain = 5.00 V/V), tachometer output with variable duty cycle, and six digital gate drivers (AHI/ALOW/BHI/BLOW/CHI/CLOW) for external power stage control. Used in industrial servo drives requiring closed-loop speed and current regulation.

For engineers reviewing the UCC3626DW datasheet, UCC3626DW pinout, UCC3626DW application, or UCC3626DW equivalent, key selection considerations include its 28-pin SOIC-DW package, 0°C to 70°C operating range, QUAD-selectable modulation mode, integrated absolute-value current reconstruction, and compatibility with Hall-effect rotor position sensing at 120° encoding.

Technical Context

The UCC3626DW implements Hall-input decoding into six commutation outputs using a deterministic state machine, synchronized to an internal 10 kHz oscillator (R_TACH/C_T-programmable). Its PWM logic supports both voltage-mode and current-mode control via separate PWM_I/PWM_NI inputs, with pulse-by-pulse overcurrent protection enabled by the SNS_I/SNS_NI differential pair feeding an internal comparator referenced to OC_REF.

Direction detection is performed by edge-triggered analysis of HALLA/HALLB/HALLC transitions, generating DIR_OUT that matches DIR_IN polarity during motoring. TACH_OUT delivers a frequency-proportional, duty-cycle-variable square wave derived from Hall-edge timing, programmable via R_TACH and C_TACH, enabling direct digital velocity feedback without external counters.

Key Specifications

Parameter	Value and Actual Design Meaning
Oscillator Frequency	10.0 kHz typical (set by R_TACH = 250 kΩ, C_T = 1 nF); enables precise PWM timing with ±3% voltage stability.
Current Sense Gain	5.00 V/V (±1.5%); provides accurate motor phase current reconstruction for analog current loop closure or overcurrent trip.
Tachometer Output	Variable-duty-cycle square wave (frequency ∝ RPM); usable directly for microcontroller-based speed measurement or low-pass filtered for analog feedback.
Supply Range	10.5 V to 14.5 V (UVLO start threshold 10.5 V); ensures stable operation across regulated 12-V industrial rails.
Output Drive	±200 mA per gate driver (AHI/ALOW/BHI/BLOW/CHI/CLOW); sufficient to drive IR2110-level high-side/low-side MOSFET drivers without buffering.
Operating Temperature	0°C to 70°C; validated for commercial-grade embedded motor control systems, not extended industrial or automotive ranges.
Reference Voltage	5.0 V ±2% (VREF); supplies precision bias for Hall sensors, current sense dividers, and external error amplifiers.

Pinout & Package

UCC3626DW is housed in a 28-pin SOIC (DW) package with standard 0.3-inch body width and 0.050-inch lead pitch. Pin layout follows TI's DW top-view convention, with GND (Pin 1) at bottom-left corner and VDD (Pin 28) at top-right.

Pin/Terminal	Circuit Role	Design Meaning
GND (Pin 1)	Power and signal reference ground	Primary return path for all internal circuits; requires local 0.1-µF ceramic bypass capacitor placement.
VREF (Pin 2)	Trimmed 5-V reference output	Stable bias source for Hall sensor pull-ups and external analog circuitry; max 5 mA load capability.
TACH_OUT (Pin 3)	Monostable tachometer output	Edge-triggered variable-duty-cycle signal; on-time set by R_TACH/C_TACH; used for speed feedback or digital counting.
R_TACH (Pin 4)	Tachometer timing resistor connection	Sets charge current for C_TACH; also programs oscillator frequency when shared with CT pin.
C_TACH (Pin 5)	Tachometer timing capacitor connection	Determines TACH_OUT pulse width; must be connected directly to GND with minimal trace length.
CT (Pin 6)	Oscillator timing capacitor node	Charged/discharged between 2.5 V and 7.5 V; sets PWM carrier frequency with R_TACH.
SYNCH (Pin 7)	External clock synchronization input	Positive-edge triggered; forces oscillator discharge; requires grounding if unused.
DIR_OUT (Pin 8)	Decoded rotor direction output	Logic-level signal indicating clockwise/counterclockwise rotation; matches DIR_IN polarity during motoring.
SNS_NI (Pin 9)	Current sense amplifier non-inverting input	Accepts one side of differential shunt voltage; paired with SNS_I for bidirectional current measurement.
SNS_I (Pin 10)	Current sense amplifier inverting input	Accepts opposite side of differential shunt; internal gain of 5.00 V/V applied to (SNS_I − SNS_NI).
IOUT (Pin 11)	Absolute-value current amplifier output	Reconstructed \|I_phase\| signal; used for overcurrent protection or current loop feedback.
OC_REF (Pin 12)	Overcurrent comparator reference input	Analog threshold setting for current-limit trip; compared against IOUT internally.
PWM_I (Pin 13)	PWM comparator inverting input	Accepts current or voltage error signal; compared against triangle waveform on CT for PWM generation.
PWM_NI (Pin 14)	PWM comparator non-inverting input	Accepts triangle waveform from CT; forms core of voltage- or current-mode PWM modulator.
VDD (Pin 15)	Positive supply input	10.5–14.5 V nominal; includes undervoltage lockout; requires local 0.1-µF ceramic decoupling.
AHI (Pin 16)	Phase A high-side gate driver output	Active-high digital output controlling external high-side switch (e.g., IR2110 HO input).
ALOW (Pin 17)	Phase A low-side gate driver output	Active-high digital output controlling external low-side switch (e.g., IR2110 LO input).
BHI (Pin 18)	Phase B high-side gate driver output	Same function as AHI, for phase B; timing coordinated with Hall decoder state machine.
BLOW (Pin 19)	Phase B low-side gate driver output	Same function as ALOW, for phase B; supports independent or complementary switching modes.
CHI (Pin 20)	Phase C high-side gate driver output	Same function as AHI, for phase C; completes full three-phase commutation set.
CLOW (Pin 21)	Phase C low-side gate driver output	Same function as ALOW, for phase C; enables full six-step BLDC sequencing.
DIR_IN (Pin 22)	Direction command input	Logic-level input selecting forward/reverse commutation sequence; determines HALL decode order.
QUAD (Pin 23)	Quadrant mode select input	Low = two-quadrant (low-side PWM only); High = four-quadrant (both high/low-side PWM).
BRAKE (Pin 24)	Brake command input	Forces all low-side outputs high and high-side outputs low; maintains TACH_OUT functionality.
COAST (Pin 25)	Coast command input	Hysteretic comparator disables all outputs above 1.75 V; used for bus overvoltage clamping.
HALLC (Pin 26)	Third Hall-effect sensor input	Accepts 120°-spaced rotor position signal; internally pulled up to VREF; requires RC filtering.
HALLB (Pin 27)	Second Hall-effect sensor input	Same function as HALLC; part of three-input Hall decoder for six-step commutation.
HALLA (Pin 28)	First Hall-effect sensor input	Same function as HALLC; initiates state transitions in Hall decoder truth table.

Key Features

Feature	Design Value
Integrated absolute-value current amplifier	Delivers \|I_phase\| on IOUT pin, enabling robust current feedback and overcurrent protection in four-quadrant operation where current polarity reverses.
QUAD-selectable PWM modulation	Configurable via single logic input to minimize switching losses in two-quadrant applications (low-side only) or enable full regenerative braking in four-quadrant mode.
Variable-duty-cycle tachometer output	TACH_OUT provides direct RPM-to-frequency conversion with programmable pulse width, eliminating need for external frequency-to-voltage converters in analog velocity loops.
Three-phase Hall decoder with direction detection	Generates correct six-step commutation signals and DIR_OUT based on HALLA/HALLB/HALLC transitions, supporting both clockwise and counterclockwise motor rotation.
Trimmed 5-V reference with 2% accuracy	VREF supplies stable bias for Hall sensors and external circuitry, reducing component count and improving system accuracy without external references.
Synchronization-capable oscillator	SYNCH input allows alignment of multiple UCC3626DW units to a master clock, critical for multi-axis motion control systems requiring phase-coherent PWM carriers.

Applications

Industrial Servo Drives	Automated HVAC Blower Systems
Use Scenario: Closed-loop speed control of PMSM motors in CNC axes and robotic joints using Hall sensors and analog tach feedback. IC Role / Device Role / Timing Role: UCC3626DW serves as the real-time commutation engine and current regulator, decoding Hall inputs, generating gate signals, and providing IOUT for inner current loop closure. Use Value: Enables precise torque control during acceleration/deceleration via four-quadrant operation, reducing mechanical stress and improving positioning accuracy.	Use Scenario: Variable-speed fan control in commercial HVAC units with overtemperature and overcurrent protection requirements. IC Role / Device Role / Timing Role: UCC3626DW acts as the motor controller core, accepting speed commands and delivering PWM-modulated gate drives while monitoring motor current via IOUT. Use Value: Integrated COAST and BRAKE inputs allow safe shutdown during fault conditions, and the 5-V VREF simplifies sensor interface design.
Medical Infusion Pumps	Electric Power Steering (EPS) Test Benches
Use Scenario: Low-noise, high-reliability motor control in portable infusion pumps requiring smooth flow rate regulation and stall detection. IC Role / Device Role / Timing Role: UCC3626DW performs Hall-based commutation and delivers clean, jitter-free TACH_OUT for microcontroller-based speed verification and safety interlocks. Use Value: Absolute-value current sensing on IOUT enables accurate stall detection without polarity ambiguity, critical for patient safety compliance.	Use Scenario: Hardware-in-the-loop (HIL) testing of EPS control algorithms using realistic motor load emulation. IC Role / Device Role / Timing Role: UCC3626DW emulates the ECU's motor control function, generating realistic gate drive waveforms and tach feedback synchronized to simulated steering torque inputs. Use Value: SYNCH input allows precise timing alignment with host test equipment clocks, ensuring deterministic response for real-time simulation validation.

Industrial Servo Drives

Automated HVAC Blower Systems

Use Scenario: Closed-loop speed control of PMSM motors in CNC axes and robotic joints using Hall sensors and analog tach feedback.

IC Role / Device Role / Timing Role: UCC3626DW serves as the real-time commutation engine and current regulator, decoding Hall inputs, generating gate signals, and providing IOUT for inner current loop closure.

Use Value: Enables precise torque control during acceleration/deceleration via four-quadrant operation, reducing mechanical stress and improving positioning accuracy.

Use Scenario: Variable-speed fan control in commercial HVAC units with overtemperature and overcurrent protection requirements.

IC Role / Device Role / Timing Role: UCC3626DW acts as the motor controller core, accepting speed commands and delivering PWM-modulated gate drives while monitoring motor current via IOUT.

Use Value: Integrated COAST and BRAKE inputs allow safe shutdown during fault conditions, and the 5-V VREF simplifies sensor interface design.

Medical Infusion Pumps

Electric Power Steering (EPS) Test Benches

Use Scenario: Low-noise, high-reliability motor control in portable infusion pumps requiring smooth flow rate regulation and stall detection.

IC Role / Device Role / Timing Role: UCC3626DW performs Hall-based commutation and delivers clean, jitter-free TACH_OUT for microcontroller-based speed verification and safety interlocks.

Use Value: Absolute-value current sensing on IOUT enables accurate stall detection without polarity ambiguity, critical for patient safety compliance.

Use Scenario: Hardware-in-the-loop (HIL) testing of EPS control algorithms using realistic motor load emulation.

IC Role / Device Role / Timing Role: UCC3626DW emulates the ECU's motor control function, generating realistic gate drive waveforms and tach feedback synchronized to simulated steering torque inputs.

Use Value: SYNCH input allows precise timing alignment with host test equipment clocks, ensuring deterministic response for real-time simulation validation.

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
UCC2626DW	Identical architecture and pinout; rated for –40°C to 85°C industrial temperature range vs. UCC3626DW's 0°C to 70°C.	Supports wider ambient operating temperatures; suitable for outdoor or uncontrolled-environment deployments.	Select UCC2626DW when extended temperature range is required; otherwise UCC3626DW remains valid for commercial indoor systems.
TMS320F28027	DSP-based solution with integrated ADC, PWM modules, and flash memory; requires firmware development; no native Hall decoder or tach monostable.	Enables field-oriented control (FOC) and adaptive algorithms; lacks hardware-level tach and absolute-value current output.	Choose TMS320F28027 for advanced control strategies; retain UCC3626DW for cost-sensitive, fixed-function six-step BLDC control with minimal software overhead.

Compared with UCC2626DW, the UCC3626DW trades extended temperature rating for lower cost and commercial qualification, while versus TMS320F28027 it offers plug-and-play Hall decoding and analog tach output without firmware investment-ideal for deterministic, low-latency commutation where algorithmic flexibility is secondary.

Availability

UCC3626DW is available at Aetrix Electronics and suitable for industrial servo drives, HVAC blower systems, medical infusion pumps, and EPS test benches requiring stable component supply and long-term production continuity.

Supply support for UCC3626DW 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 heritage.

The UCC3626DW belongs to TI's legacy UCC family of dedicated motor controller ICs, designed specifically for cost-effective, high-reliability six-step BLDC commutation in commercial-grade industrial and medical equipment.

FAQ

What is the operating temperature range specified for the UCC3626DW?

The UCC3626DW is rated for operation from 0°C to 70°C ambient temperature. This commercial-grade specification is documented in the "Available Options" table of the SLUS318B datasheet and confirmed in the electrical characteristics section, which states "TA = 0°C to 70°C for the UCC3626." It is distinct from the UCC2626DW, which supports –40°C to 85°C.

How does the QUAD input affect PWM modulation in the UCC3626DW?

When QUAD = 0 (low), the UCC3626DW modulates only the low-side gate drivers (ALOW/BLOW/CLOW), keeping high-side outputs static-suitable for two-quadrant operation with reduced switching loss. When QUAD = 1 (high), both high- and low-side drivers are PWM-modulated, enabling true four-quadrant control including regenerative braking and controlled reversal, as detailed in Figures 9–11 of the SLUS318B datasheet.

Can the UCC3626DW directly drive power MOSFETs, or does it require external gate drivers?

The UCC3626DW does not directly drive power MOSFETs; it outputs logic-level gate control signals (AHI/ALOW/BHI/BLOW/CHI/CLOW) rated for ±200 mA sink/source. These signals are intended to interface with dedicated high- and low-side gate drivers such as the IR2110, as shown in Figure 17 of the SLUS318B datasheet. Direct MOSFET connection is not supported due to voltage level and current limitations.

What is the function of the IOUT pin on the UCC3626DW, and how is it derived?

The IOUT pin on the UCC3626DW outputs the absolute value of the amplified differential current sense signal: IOUT = |5 × (SNS_I − SNS_NI)|. As described in the "pin descriptions" section (page 6), this signal reconstructs actual motor phase current magnitude regardless of direction, making it usable for overcurrent protection, analog current loop feedback, or additional filtering-critical for four-quadrant operation where current polarity reverses.

Is the UCC3626DW compatible with 60° Hall sensor encoding, or only 120°?

The UCC3626DW is designed for 120° Hall sensor encoding, as explicitly stated in the "APPLICATION INFORMATION" section (page 8). However, motors with 60° encoding can be adapted using an external logic circuit-TI provides a reference design in Figure 1 of SLUS318B using discrete transistors and resistors to convert 60° to 120° format before connecting to HALLA/HALLB/HALLC pins.

UCC3626DW 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:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 28-SOIC

UCC3626DW FAQ

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Please submit a Request for Quotation (RFQ) for UCC3626DW on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

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The price and inventory of UCC3626DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC3626DW is usually 5 days.

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Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

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6.How does Aetrix verify that UCC3626DW is sourced from the original manufacturer or authorized distributors?

All UCC3626DW 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 UCC3626DW meets industry standards.

7.What is the process for return or replacement of UCC3626DW?

All UCC3626DW units undergo pre-shipment inspection (PSI). If there is an issue with UCC3626DW, 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 UCC3626DW part is unused and in its original packaging.

Return procedure for UCC3626DW:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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