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Texas Instruments UCC3626PW
- Part No.:
- UCC3626PW
- Manufacturer:
- Texas Instruments
- Category:
- Motor Drivers, Controllers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
UCC3626PW.pdf
- Description:
- IC MOTOR DRVR 11V-14.5V 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,069
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Product details
Overview
UCC3626PW 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 V/V), precision tachometer output (variable duty-cycle, frequency-proportional to RPM), and synchronized triangle oscillator (9–11 kHz typical). 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 UCC3626PW datasheet, UCC3626PW pinout, UCC3626PW application, or UCC3626PW equivalent, key selection considerations include its QUAD-selectable modulation mode (low-side only vs. full-bridge PWM), differential current-sense amplifier with ±0.5 V input range, DIR_IN/DIR_OUT direction logic, and TSSOP-28 package compatibility with 0°C to 70°C operating temperature.
Technical Context
The UCC3626PW implements Hall-based commutation decoding for 120°-spaced rotor position sensors, generating six phase outputs via a latched PWM comparator driven by either voltage-mode (PWM_I/PWM_NI) or current-mode (IOUT feedback) control. Its oscillator uses CT and R_TACH to generate a 5-V peak-to-peak triangle waveform, synchronizable via SYNCH input with external master clock.
Current sensing employs a trimmed differential amplifier (input offset ≤8 mV, PSRR ≥60 dB) followed by absolute-value circuitry to reconstruct bidirectional motor current as IOUT = 5 × |SNS_I − SNS_NI|, enabling pulse-by-pulse overcurrent protection and closed-loop current control. The tachometer generates TACH_OUT pulses triggered on Hall transitions, with on-time programmable via R_TACH and C_TACH.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp | 0°C to 70°C - Specifies commercial-grade thermal envelope for stable operation in non-automotive industrial environments. |
| Oscillator Freq | 9–11 kHz (typ.) - Sets base PWM switching frequency; adjustable via CT (1 nF) and R_TACH (250 kΩ) per fOSC = 2.5/(R_TACH × CT). |
| Current Sense Gain | 5.00 V/V (±1.5%) - Enables direct reconstruction of motor current magnitude at IOUT pin for analog current loop closure. |
| Tach Output Duty | Variable duty cycle - Provides digital speed feedback proportional to motor RPM; usable directly by microcontrollers or filtered to analog voltage. |
| Supply Voltage | 12 V nominal, UVLO start at 10.5 V - Ensures reliable startup and shutdown behavior across 11–14.5 V input range. |
| Output Drive | ±200 mA per AHI/ALOW/BHI/BLOW/CHI/CLOW - Sufficient to directly drive high-current gate drivers (e.g., IR2110) without buffering. |
| Reference Voltage | 5.0 V ±2% (VREF) - Precision trimmed internal reference for biasing Hall sensors, current sense dividers, and external analog circuitry. |
Pinout & Package
TSSOP-28 package (PW), 9.7 mm × 4.4 mm body, 0.65 mm pitch, exposed thermal pad (not electrically connected), RoHS-compliant NIPDAU lead finish, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power and signal reference ground | Primary return path for all internal circuits; requires low-inductance local bypassing with 0.1 µF ceramic capacitor. |
| VREF (Pin 2) | 5-V precision reference output | Stable 5-V source for Hall sensor pull-ups and external analog circuitry; max 5 mA load capability. |
| TACH_OUT (Pin 3) | Monostable tachometer output | Variable-duty-cycle square wave triggered by Hall transitions; frequency ∝ motor RPM, on-time set by R_TACH/C_TACH. |
| R_TACH (Pin 4) | Tachometer timing resistor connection | Sets charge current for C_TACH (ICHARGE ≈ 48–53 µA); also programs oscillator current IOSC = 25/R_TACH. |
| C_TACH (Pin 5) | Tachometer timing capacitor connection | Charged by R_TACH current to set TACH_OUT pulse width; tON = R_TACH × C_TACH (e.g., 250 kΩ × 100 pF = 25 µs). |
| CT (Pin 6) | Oscillator timing capacitor connection | Charged/discharged between 2.5 V and 7.5 V to generate triangle waveform; sets PWM frequency with R_TACH. |
| SYNCH (Pin 7) | External oscillator synchronization input | Accepts positive-edge clock pulses to align CT waveform; requires parallel R_TACH when active; must be grounded otherwise. |
| DIR_OUT (Pin 8) | Decoded rotor direction output | Digital signal indicating clockwise/counterclockwise rotation based on Hall sequence; polarity matches DIR_IN during motoring. |
| SNS_NI (Pin 9) | Current sense amplifier non-inverting input | One terminal of differential pair measuring motor phase current; supports ±0.5 V common-mode range. |
| SNS_I (Pin 10) | Current sense amplifier inverting input | Second terminal of differential pair; together with SNS_NI, feeds absolute-value amplifier to produce IOUT. |
| IOUT (Pin 11) | Reconstructed current magnitude output | Analog voltage = 5 × |SNS_I − SNS_NI|; used for current limiting, analog current loops, or filtering before ADC sampling. |
| OC_REF (Pin 12) | Overcurrent trip threshold input | Analog voltage setting comparator threshold for pulse-by-pulse current limiting; referenced to internal current sense output. |
| PWM_I (Pin 13) | PWM comparator inverting input | Accepts current or voltage error signal for current-mode or voltage-mode PWM control; common-mode range 2–8 V. |
| PWM_NI (Pin 14) | PWM comparator non-inverting input | Connects to CT triangle waveform; comparison with PWM_I determines PWM duty cycle and edge timing. |
| VDD (Pin 15) | Positive supply input | 12-V nominal supply with undervoltage lockout (UVLO start at 10.5 V, hysteresis 0.4 V); bypass with 0.1 µF ceramic. |
| AHI (Pin 16) | Phase A high-side gate driver output | Digital output controlling upper MOSFET/IGBT in phase A leg; ±200 mA drive strength; active during commutation states. |
| ALOW (Pin 17) | Phase A low-side gate driver output | Digital output controlling lower MOSFET/IGBT in phase A leg; complements AHI per Hall-decoded state table. |
| BHI (Pin 18) | Phase B high-side gate driver output | Phase B upper switch control; timing and state determined by HALLA/HALLB/HALLC decoding and DIR_IN polarity. |
| BLOW (Pin 19) | Phase B low-side gate driver output | Phase B lower switch control; coordinated with BRAKE/COAST commands and QUAD mode selection. |
| CHI (Pin 20) | Phase C high-side gate driver output | Phase C upper switch control; enables full three-phase six-step commutation in both two- and four-quadrant modes. |
| CLOW (Pin 21) | Phase C low-side gate driver output | Phase C lower switch control; disabled during COAST, forced low during BRAKE regardless of QUAD setting. |
| DIR_IN (Pin 22) | Direction command input | Digital input selecting forward/reverse sequencing of Hall decoder outputs; defines clockwise vs. counterclockwise rotation order. |
| QUAD (Pin 23) | Quadrant operation mode select | Logic high enables four-quadrant PWM (modulates both high- and low-side switches); logic low restricts to two-quadrant (low-side only). |
| BRAKE (Pin 24) | Braking command input | Active-high signal forcing all low-side outputs ON and all high-side outputs OFF; maintains TACH_OUT functionality during braking. |
| COAST (Pin 25) | Coasting command input | Hysteretic comparator input (1.75 V threshold); disables all outputs when >1.75 V, enabling regenerative bus clamp in four-quadrant systems. |
| HALLC (Pin 26) | Rotor position sensor input C | One of three 120°-spaced Hall sensor inputs; accepts 1.7–2.1 V high-level signals; requires external pull-up to VREF. |
| HALLB (Pin 27) | Rotor position sensor input B | Second Hall input; hysteresis 0.6–1.0 V prevents noise-induced false commutation; used with HALLA/HALLC for six-state decoding. |
| HALLA (Pin 28) | Rotor position sensor input A | First Hall input; forms basis of commutation truth table; all three inputs must be valid (never simultaneously high/low) for proper operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Hall decoder | Directly interprets 120°-spaced HALLA/B/C inputs to generate six-phase gate drive signals without external logic. |
| Four-quadrant PWM enable | QUAD pin configures full-bridge modulation to support controlled regeneration and torque reversal in quadrants II/IV. |
| Reconstructed current output | IOUT provides absolute-value motor current (5× differential sense) for analog current loops and overcurrent protection without external rectification. |
| Programmable tachometer | TACH_OUT pulse width and frequency independently set via R_TACH and C_TACH for precise speed feedback scaling. |
| Synchronizable oscillator | SYNCH input allows alignment of CT waveform to system master clock, critical for multi-axis coordinated motion control. |
| Direction detection & output | DIR_IN command and DIR_OUT feedback provide unambiguous rotor direction information for closed-loop velocity control. |
Applications
| Industrial CNC Spindle Control | Medical Infusion Pump Motor Drive |
|---|---|
Use Scenario: High-precision, variable-speed spindle rotation in CNC milling machines requiring smooth acceleration/deceleration and torque consistency across 0–10,000 RPM. IC Role / Device Role / Timing Role: UCC3626PW serves as the core commutation and current-regulated PWM controller, decoding Hall feedback and driving external half-bridge gate drivers (e.g., IR2110) for three-phase BLDC motor. Use Value: Four-quadrant operation (QUAD=1) enables active braking during rapid deceleration, while IOUT-based current loop ensures constant torque delivery independent of back-EMF variation. | Use Scenario: Low-noise, ultra-stable peristaltic pump motor control in hospital infusion devices where flow accuracy and silent operation are critical. IC Role / Device Role / Timing Role: UCC3626PW functions as the Hall-commutated motor controller, using TACH_OUT for closed-loop speed regulation and COAST input for safe motor coasting during dose pauses. Use Value: Variable-duty-cycle tachometer output allows microcontroller-based PID tuning with <1% speed error; VREF-stabilized Hall biasing ensures consistent commutation at low speeds (<100 RPM). |
| Automated Guided Vehicle (AGV) Steering Actuator | Lab Equipment Centrifuge Drive |
Use Scenario: Bidirectional torque control for AGV steering motors that must reverse direction rapidly while maintaining positional accuracy under varying load inertia. IC Role / Device Role / Timing Role: UCC3626PW acts as the real-time commutation engine, accepting DIR_IN commands and generating phase outputs synchronized to Hall position for precise angular control. Use Value: DIR_OUT feedback confirms actual rotor direction to prevent control instability during transient reversals; BRAKE input enables immediate mechanical stopping without relying on friction alone. | Use Scenario: High-RPM centrifuge requiring controlled ramp-up to 15,000 RPM and emergency stop capability with minimal rotor oscillation. IC Role / Device Role / Timing Role: UCC3626PW operates as the primary motor controller, using SNS_I/SNS_NI inputs to monitor phase current and enforce strict overcurrent limits during spin-up. Use Value: Pulse-by-pulse current limiting (via OC_REF) prevents winding saturation during acceleration; TACH_OUT frequency scaling enables accurate RPM readback up to 20 kHz output rate. |
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 |
|---|---|---|---|
| UCC2626PW | Identical pinout and architecture but rated for –40°C to 85°C industrial temperature range; oscillator and tach accuracy specs identical. | Supports wider ambient temperature environments including outdoor or uncontrolled industrial enclosures. | Select UCC2626PW when operation below 0°C or above 70°C is required; UCC3626PW remains optimal for cost-sensitive commercial-grade designs. |
| DRV8301DCA | Integrated gate drivers + current shunt amplifiers; no Hall decoder; SPI-configurable; supports FOC via external MCU; 3.3-V logic interface. | Requires external microcontroller for commutation logic and closed-loop control; targets field-oriented control (FOC) rather than trapezoidal Hall control. | Choose DRV8301DCA for advanced sinusoidal drive or when integrating motor control firmware; UCC3626PW is preferred for standalone Hall-based simplicity and analog loop integration. |
Compared with UCC2626PW, UCC3626PW trades extended temperature range for lower cost and tighter commercial qualification; compared with DRV8301DCA, it eliminates MCU dependency and analog signal conditioning but lacks programmability and FOC support-making it ideal for fixed-function, cost-optimized BLDC systems.
Availability
UCC3626PW is available at Aetrix Electronics and suitable for industrial motion control, medical device actuation, automated material handling, and lab equipment requiring stable component supply with long-term lifecycle visibility.
Supply support for UCC3626PW 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 UCC3626PW belongs to TI's legacy UCC family of dedicated brushless DC motor controllers, designed specifically for Hall-sensor-based trapezoidal commutation in cost-sensitive industrial and medical motion systems.
FAQ
What is the operating temperature range for the UCC3626PW?
The UCC3626PW is specified for operation from 0°C to 70°C ambient temperature. This commercial-grade range suits indoor industrial equipment, medical devices, and laboratory instruments where environmental control is maintained. It differs from the UCC2626PW, which extends to –40°C to 85°C for harsher environments. Thermal derating is not required within this range, and the device includes built-in undervoltage lockout to ensure reliable startup and shutdown behavior.
How does the QUAD pin affect PWM operation in the UCC3626PW?
The QUAD pin on the UCC3626PW selects between two-quadrant (QUAD = 0) and four-quadrant (QUAD = 1) PWM modulation. When QUAD = 0, only the low-side outputs (ALOW/BLOW/CLOW) are modulated, minimizing switching losses in simpler applications. When QUAD = 1, both high- and low-side outputs are PWM-controlled, enabling active regeneration and controlled torque reversal in quadrants II and IV-critical for dynamic braking and bidirectional motion control.
Can the UCC3626PW drive MOSFETs directly, or is a gate driver required?
The UCC3626PW provides ±200 mA output drive per gate output (AHI/ALOW/etc.), sufficient to drive small-signal MOSFETs or IGBTs with low gate charge. However, for typical power-stage MOSFETs (e.g., IRF730, 10–50 nC gate charge), an external high-current gate driver such as the IR2110 is required to ensure fast, robust switching and isolation. The UCC3626PW is explicitly designed as a controller-not a driver-and expects external gate drivers to interface with the power stage.
What is the function of the IOUT pin on the UCC3626PW?
The IOUT pin on the UCC3626PW delivers the reconstructed motor current as an analog voltage equal to 5 × |SNS_I − SNS_NI|. This absolute-value output enables pulse-by-pulse overcurrent protection, analog current-loop closure, and filtering prior to ADC sampling. Unlike raw differential sense signals, IOUT eliminates polarity inversion during flyback, making it directly usable for analog feedback without external rectification or amplification-simplifying current control design in UCC3626PW-based systems.
How is the tachometer output (TACH_OUT) calibrated for motor speed measurement?
The TACH_OUT signal from the UCC3626PW is a variable-duty-cycle square wave whose frequency equals (motor RPM × pole pairs) / 20. Its on-time is set by R_TACH and C_TACH (tON = R_TACH × C_TACH), while frequency scales linearly with rotor speed. For calibration, users select R_TACH/C_TACH values so that maximum expected tach period exceeds tON-ensuring clean pulse separation. The output can feed a microcontroller counter or be low-pass filtered to generate an analog voltage proportional to RPM, as shown in TI's Figure 7 reference design.
UCC3626PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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-TSSOP
UCC3626PW FAQ
1.How can I place an order for UCC3626PW through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC3626PW 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 UCC3626PW reliable?
The price and inventory of UCC3626PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC3626PW is usually 5 days.
3.What payment methods are accepted for UCC3626PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC3626PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC3626PW?
UCC3626PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC3626PW 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 UCC3626PW?
For technical support, including UCC3626PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC3626PW requirements.
6.How does Aetrix verify that UCC3626PW is sourced from the original manufacturer or authorized distributors?
All UCC3626PW 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 UCC3626PW meets industry standards.
7.What is the process for return or replacement of UCC3626PW?
All UCC3626PW units undergo pre-shipment inspection (PSI). If there is an issue with UCC3626PW, 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 UCC3626PW part is unused and in its original packaging.
Return procedure for UCC3626PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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