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Texas Instruments UCC3626PWTR
- Part No.:
- UCC3626PWTR
- Manufacturer:
- Texas Instruments
- Category:
- Motor Drivers, Controllers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
UCC3626PWTR.pdf
- Description:
- IC MOTOR DRVR 11V-14.5V 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,974
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Product details
Overview
UCC3626PWTR 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), 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 UCC3626PWTR datasheet, UCC3626PWTR pinout, UCC3626PWTR application, or UCC3626PWTR equivalent, this device is selected for closed-loop speed and current control in servo drives, precision positioning equipment, and programmable logic-controlled motor systems requiring accurate rotor direction detection (DIR_OUT), pulse-by-pulse overcurrent protection, and configurable PWM modulation mode via QUAD input.
Technical Context
The UCC3626PWTR implements Hall-based commutation decoding with direction-sensitive logic (DIR_IN/DIR_OUT), enabling clockwise/counterclockwise rotation detection. Its oscillator uses CT and R_TACH to generate a 9–11 kHz triangle waveform with 5 V peak-to-peak amplitude, synchronizable via SYNCH input using an external master clock.
Current sensing employs a differential amplifier (SNS_I/SNS_NI) with 8 mV max input offset and 60 dB PSRR, feeding an absolute-value circuit to reconstruct bidirectional motor current. The tachometer (TACH_OUT) produces a variable-duty-cycle output triggered by Hall transitions, with on-time programmable via R_TACH and C_TACH per tON = R_TACH × C_TACH.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator Frequency | 9–11 kHz typical; sets PWM carrier rate for motor phase switching and noise immunity. |
| Current Sense Gain | 5.00 V/V ±1.5%; enables direct reconstruction of motor phase current magnitude for protection and control loops. |
| Tachometer Output | Variable duty-cycle square wave; frequency ∝ motor RPM, usable for digital velocity feedback or analog filtering. |
| Supply Voltage Range | 10.5–15 V; undervoltage lockout disables outputs below 10.5 V to prevent erratic commutation. |
| Hall Input Hysteresis | 0.6–1.0 V; rejects noise on HALLA/B/C signals to ensure stable rotor position decoding. |
| Output Drive Capability | ±200 mA per AHI/ALOW/BHI/BLOW/CHI/CLOW; directly interfaces with gate drivers like IR2110 without buffering. |
| Reference Voltage | 4.9–5.1 V at –2 mA load; provides stable bias for Hall pull-ups, R_TACH programming, and external circuitry. |
Pinout & Package
TSSOP-28 (PW) package: 9.7 mm × 4.4 mm, 0.65 mm pitch, thermally enhanced with exposed pad (not electrically connected). Pin 1 marked by dot; top-view orientation matches TI DW/PW package diagrams.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power and signal reference ground | Must be low-impedance connection point for all bypass capacitors (e.g., 0.1 µF ceramic at VDD, VREF, CT, C_TACH). |
| VREF (Pin 2) | Trimmed 5-V reference output | Supplies bias for Hall sensors and timing resistors; requires ≥0.1 µF ceramic bypass to GND. |
| TACH_OUT (Pin 3) | Monostable tachometer output | Variable-duty-cycle signal triggered by Hall edges; used for speed feedback in digital or analog velocity loops. |
| R_TACH (Pin 4) | Tachometer timing resistor connection | Sets TACH_OUT on-time (tON = R_TACH × C_TACH) and oscillator charge current (IOSC = 25/R_TACH µA). |
| C_TACH (Pin 5) | Tachometer timing capacitor connection | Charged by R_TACH current; determines pulse width of TACH_OUT monostable output. |
| CT (Pin 6) | Oscillator timing capacitor node | Connected to ground via 1 nF typical; generates triangle waveform (2.5–7.5 V) for PWM comparator. |
| SYNCH (Pin 7) | External oscillator synchronization input | Accepts positive-edge clock pulses; requires parallel R_TACH resistor when enabled; must be grounded otherwise. |
| DIR_OUT (Pin 8) | Decoded rotor direction output | Digital signal indicating clockwise/counterclockwise rotation; polarity matches DIR_IN during motoring. |
| SNS_NI (Pin 9) | Current sense amplifier non-inverting input | Connects to one side of shunt resistor; forms differential pair with SNS_I for bidirectional current measurement. |
| SNS_I (Pin 10) | Current sense amplifier inverting input | Connects to other side of shunt resistor; enables gain-of-5 amplification of differential voltage across sense element. |
| IOUT (Pin 11) | Absolute-value current sense output | Reconstructed |Iphase| signal; used for overcurrent protection and current loop closure. |
| OC_REF (Pin 12) | Overcurrent trip threshold input | Analog voltage setting comparator threshold; internal comparator compares IOUT against this level. |
| PWM_I (Pin 13) | PWM comparator inverting input | Accepts current or voltage error signal; compared against triangle waveform on CT for duty-cycle generation. |
| PWM_NI (Pin 14) | PWM comparator non-inverting input | Connects to CT node; receives oscillator triangle waveform for standard PWM generation. |
| VDD (Pin 15) | Positive supply input | 10.5–15 V range; requires local 0.1 µF ceramic bypass; UVLO active below 10.5 V. |
| AHI (Pin 16) | Phase A high-side gate drive output | Digital output controlling upper MOSFET/IGBT in phase A leg; ±200 mA capable. |
| ALOW (Pin 17) | Phase A low-side gate drive output | Digital output controlling lower MOSFET/IGBT in phase A leg; ±200 mA capable. |
| BHI (Pin 18) | Phase B high-side gate drive output | Digital output controlling upper MOSFET/IGBT in phase B leg; ±200 mA capable. |
| BLOW (Pin 19) | Phase B low-side gate drive output | Digital output controlling lower MOSFET/IGBT in phase B leg; ±200 mA capable. |
| CHI (Pin 20) | Phase C high-side gate drive output | Digital output controlling upper MOSFET/IGBT in phase C leg; ±200 mA capable. |
| CLOW (Pin 21) | Phase C low-side gate drive output | Digital output controlling lower MOSFET/IGBT in phase C leg; ±200 mA capable. |
| DIR_IN (Pin 22) | Direction command input | Logic-level input selecting commutation sequence order (clockwise vs counterclockwise). |
| QUAD (Pin 23) | Quadrant selection input | High = four-quadrant (modulates both high/low sides); Low = two-quadrant (modulates low sides only). |
| BRAKE (Pin 24) | Brake mode activation input | Forces all low-side outputs ON and high-side outputs OFF; maintains TACH_OUT functionality. |
| COAST (Pin 25) | Coast mode activation input | Hysteretic comparator disables all outputs above 1.75 V; used for bus overvoltage clamping. |
| HALLC (Pin 26) | Rotor position sensor input C | 120°-spaced Hall sensor input; internally pulled up to VREF; requires RC filtering per TI design guidelines. |
| HALLB (Pin 27) | Rotor position sensor input B | 120°-spaced Hall sensor input; same electrical specs and filtering requirements as HALLC. |
| HALLA (Pin 28) | Rotor position sensor input A | 120°-spaced Hall sensor input; same electrical specs and filtering requirements as HALLC. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Hall decoder with direction detection | Directly interprets 120° Hall codes (HALLA/B/C) to generate six commutation outputs and DIR_OUT signal without external logic. |
| Four-quadrant PWM modulation control | QUAD pin configures simultaneous high/low-side switching to eliminate uncontrolled circulating currents during torque reversal. |
| Reconstructed motor current output (IOUT) | Combines differential amplifier (5 V/V gain) and absolute-value circuit to deliver continuous |Iphase| signal for protection and control. |
| Programmable tachometer with monostable | TACH_OUT on-time set by R_TACH/C_TACH; frequency proportional to RPM; supports both digital counting and analog filtering. |
| Synchronizable oscillator | SYNCH input accepts external clock edges to align CT triangle waveform with system master clock, reducing EMI in multi-controller systems. |
| Undervoltage lockout with hysteresis | UVLO activates below 10.5 V (±0.5 V) with 0.4 V hysteresis to prevent partial or unstable operation during brownout conditions. |
Applications
| Industrial Servo Drives | Programmable Logic Controller (PLC) Motor Modules |
|---|---|
Use Scenario: High-precision position and velocity control in CNC machine axes using Hall-effect feedback and closed-loop current regulation. IC Role / Device Role / Timing Role: UCC3626PWTR serves as the real-time commutation engine, decoding Hall signals, generating synchronized PWM, and delivering reconstructed current for inner-loop control. Use Value: Enables sub-millisecond torque response and <1% speed ripple via precise tachometer feedback and four-quadrant current control. |
Use Scenario: Modular motor control units in factory automation systems where PLCs issue direction/speed commands and require fault-tolerant braking (BRAKE/COAST). IC Role / Device Role / Timing Role: UCC3626PWTR acts as the dedicated motor interface IC, translating PLC logic-level commands into six-phase gate drive signals with integrated safety features. Use Value: Reduces external component count by integrating Hall decoding, current sensing, tachometer, and UVLO-cutting BOM cost by ~30% versus discrete solutions. |
| Medical Infusion Pumps | Automated Test Equipment (ATE) Motion Stages |
Use Scenario: Silent, low-vibration fluid delivery in portable infusion pumps requiring smooth acceleration/deceleration and microstep-equivalent resolution. IC Role / Device Role / Timing Role: UCC3626PWTR provides quiet two-quadrant operation (QUAD=0) with coast/brake functions for emergency stop and pressure relief. Use Value: Eliminates audible PWM whine through optimized 10 kHz oscillator and reduces mechanical resonance via controlled current ramping. |
Use Scenario: High-repeatability XY positioning stages in semiconductor wafer probers, where thermal stability and long-term speed accuracy are critical. IC Role / Device Role / Timing Role: UCC3626PWTR delivers stable tachometer output (±3% on-time accuracy) referenced to its internal 5-V VREF, minimizing drift over temperature. Use Value: Achieves <±0.5% speed regulation over 0–70°C ambient via trimmed VREF and low-drift oscillator components. |
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 |
|---|---|---|---|
| UCC2626PWTR | Wider temperature range (–40°C to 85°C) and identical pinout/functionality; differs only in operating temperature grade. | Preferred for industrial environments with extended ambient ranges; not rated for 0–70°C-only designs requiring tighter initial calibration. | Select UCC2626PWTR when operating outside 0–70°C or when legacy UCC2626 design reuse is required. |
| DRV8301DCA | Integrated gate drivers + current shunt amplifiers + buck converter; no Hall decoder or tachometer; SPI-configurable. | Requires external MCU for commutation logic and speed feedback processing; lacks DIR_OUT and TACH_OUT hardware outputs. | Choose DRV8301DCA for space-constrained designs needing integrated power stage drivers but accepting added firmware complexity. |
Compared with UCC2626PWTR, the UCC3626PWTR offers tighter initial oscillator tolerance and optimized parameters for 0–70°C commercial use, while DRV8301DCA shifts intelligence to software at the cost of real-time analog tachometer and Hall decoding capability.
Availability
UCC3626PWTR is available at Aetrix Electronics and suitable for industrial servo drives, PLC motor modules, medical infusion pumps, and automated test equipment requiring stable component supply across production lifecycles.
Supply support for UCC3626PWTR 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 expertise in motor control ICs.
The UCC3626PWTR belongs to TI's legacy UCC family of dedicated brushless DC motor controllers, designed specifically for Hall-sensor-based commutation in cost-sensitive, high-reliability motion systems without requiring external microcontrollers.
FAQ
What is the operating temperature range for the UCC3626PWTR?
The UCC3626PWTR is specified for operation from 0°C to 70°C ambient temperature. This commercial-grade rating distinguishes it from the industrial-grade UCC2626PWTR (–40°C to 85°C). All electrical characteristics-including oscillator frequency, tachometer on-time accuracy, and current sense gain-are guaranteed within this 0–70°C range per the SLUS318B datasheet revision.
How does the QUAD pin affect PWM operation in the UCC3626PWTR?
When QUAD = 0 (low), the UCC3626PWTR modulates only the low-side outputs (ALOW/BLOW/CLOW) while keeping high-side outputs (AHI/BHI/CHI) static-enabling two-quadrant operation with reduced switching losses. When QUAD = 1 (high), both high- and low-side outputs are PWM-modulated, enabling true four-quadrant control with controlled current decay during off-time and elimination of uncontrolled circulating currents.
Can the UCC3626PWTR directly drive power MOSFETs without external gate drivers?
No. The UCC3626PWTR outputs (AHI/ALOW/BHI/BLOW/CHI/CLOW) provide logic-level signals with ±200 mA drive strength, intended to interface with dedicated high- and low-side gate drivers such as the IR2110. Direct MOSFET driving is not supported due to insufficient voltage swing and lack of bootstrap or level-shifting circuitry required for high-side N-channel devices.
What is the function of the IOUT pin on the UCC3626PWTR?
The IOUT pin delivers the output of the integrated differential current-sense amplifier (gain = 5 V/V) combined with an absolute-value circuit. It provides a continuous positive-voltage representation of motor phase current magnitude (|Iphase|), usable for overcurrent protection, current-loop feedback, or analog filtering-eliminating the need for external op-amps or rectifiers in four-quadrant applications.
How is tachometer output frequency related to motor speed in the UCC3626PWTR?
The UCC3626PWTR's TACH_OUT frequency equals (motor RPM × pole pairs) / 20 Hz. For example, a 4-pole motor spinning at 3000 RPM yields TACH_OUT frequency = (3000 × 2) / 20 = 300 Hz. The duty cycle varies with commutation timing but remains usable for digital counting or low-pass filtering to extract analog speed voltage.
UCC3626PWTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
UCC3626PWTR FAQ
1.How can I place an order for UCC3626PWTR through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC3626PWTR 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 UCC3626PWTR reliable?
The price and inventory of UCC3626PWTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC3626PWTR is usually 5 days.
3.What payment methods are accepted for UCC3626PWTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC3626PWTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC3626PWTR?
UCC3626PWTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC3626PWTR 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 UCC3626PWTR?
For technical support, including UCC3626PWTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC3626PWTR requirements.
6.How does Aetrix verify that UCC3626PWTR is sourced from the original manufacturer or authorized distributors?
All UCC3626PWTR 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 UCC3626PWTR meets industry standards.
7.What is the process for return or replacement of UCC3626PWTR?
All UCC3626PWTR units undergo pre-shipment inspection (PSI). If there is an issue with UCC3626PWTR, 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 UCC3626PWTR part is unused and in its original packaging.
Return procedure for UCC3626PWTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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