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Texas Instruments UCC3626PWTRG4
- Part No.:
- UCC3626PWTRG4
- Manufacturer:
- Texas Instruments
- Category:
- Motor Drivers, Controllers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
UCC3626PWTRG4.pdf
- Description:
- IC MOTOR DRVR 11V-14.5V 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,563
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Product details
Overview
UCC3626PWTRG4 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 (9–11 kHz), differential current-sense amplifier (gain = 5 V/V, ±8 mV offset), tachometer output with variable duty cycle, and six PWM outputs (AHI/ALOW/BHI/BLOW/CHI/CLOW) for external power stage control. It is used in industrial servo drives requiring closed-loop speed and current control.
For engineers reviewing the UCC3626PWTRG4 datasheet, UCC3626PWTRG4 pinout, UCC3626PWTRG4 application, or UCC3626PWTRG4 equivalent, key selection factors include its Hall-input decoding logic, QUAD-selectable modulation mode, integrated absolute-value current reconstruction, and 0°C to 70°C operating temperature range specific to the UCC3626 variant.
Technical Context
The UCC3626PWTRG4 implements rotor position decoding from three 120°-spaced Hall inputs (HALLA/HALLB/HALLC) to generate commutation signals for a three-phase inverter. Its PWM logic supports both voltage-mode and current-mode control via PWM_I/PWM_NI comparators, with oscillator synchronization capability through the SYNCH input.
Current sensing uses a differential amplifier (SNS_I/SNS_NI) followed by an absolute-value circuit to reconstruct bidirectional motor current for pulse-by-pulse overcurrent protection and analog current loop closure. The DIR_IN/DIR_OUT interface provides direction detection and feedback, while BRAKE and COAST inputs enable hardware-level motor stop and coast modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator frequency | 9–11 kHz at CT = 1 nF, R_TACH = 250 kΩ - sets base PWM switching rate for motor phase control |
| Current sense gain | 5.00 V/V ±1.5% - enables accurate reconstruction of motor phase current magnitude for protection and regulation |
| 5-V reference accuracy | 4.9–5.1 V at –2 mA load - supplies stable bias for Hall sensors and external circuitry |
| UVLO start threshold | 10.5 V typical - prevents erratic operation during brown-out conditions |
| Tachometer on-time accuracy | ±3% - ensures precise speed-derived timing for digital velocity loop implementation |
| Output drive strength | ±200 mA per AHI/ALOW/BHI/BLOW/CHI/CLOW - directly interfaces with gate drivers like IR2110 without buffering |
| Operating temperature | 0°C to 70°C - defines commercial-grade thermal envelope for embedded motor control systems |
Pinout & Package
TSSOP-28 (PW) package: 4.4 mm × 9.7 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) | Reference ground | Common return for all analog/digital functions; requires low-inductance ceramic bypassing |
| VREF (Pin 2) | 5-V precision reference output | Stable 5-V source for Hall sensor biasing and external analog circuitry |
| TACH_OUT (Pin 3) | Variable-duty-cycle tachometer output | Frequency-proportional square wave usable for digital speed measurement or analog filtering |
| R_TACH (Pin 4) | Tachometer timing resistor connection | Sets monostable on-time via ICHARGE = 25 µA / R_TACH; also programs oscillator current |
| C_TACH (Pin 5) | Tachometer timing capacitor connection | Charged by R_TACH current to set TACH_OUT pulse width; must be grounded locally |
| CT (Pin 6) | Oscillator timing capacitor connection | Generates triangle waveform (2.5–7.5 V) for PWM comparator; requires direct GND tie |
| SYNCH (Pin 7) | External clock synchronization input | Positive-edge-triggered; requires parallel R_TACH when enabled; must be grounded otherwise |
| DIR_OUT (Pin 8) | Direction indication output | Logic-level signal indicating actual rotor rotation direction (CW/CCW) decoded from Hall inputs |
| SNS_NI (Pin 9) | Current sense non-inverting input | Differential input to internal amplifier; used with SNS_I for bidirectional current monitoring |
| SNS_I (Pin 10) | Current sense inverting input | Differential input to internal amplifier; paired with SNS_NI for full-scale current reconstruction |
| IOUT (Pin 11) | Current sense amplifier output | 5×|ISNS_I − ISNS_NI| - absolute-value representation of motor phase current |
| OC_REF (Pin 12) | Overcurrent trip reference input | Analog voltage setting threshold for internal overcurrent comparator; referenced to IOUT |
| PWM_I (Pin 13) | PWM comparator inverting input | Accepts current or voltage error signal for current-mode or voltage-mode control loops |
| PWM_NI (Pin 14) | PWM comparator non-inverting input | Connects to CT triangle waveform; comparison with PWM_I sets PWM duty cycle |
| VDD (Pin 15) | Supply voltage input | 12-V nominal supply with UVLO (10.5 V start); requires ≥0.1 µF ceramic bypass to GND |
| AHI (Pin 16) | Phase A high-side driver output | Active-high digital output controlling external high-side switch (e.g., IR2110 HO) |
| ALOW (Pin 17) | Phase A low-side driver output | Active-high digital output controlling external low-side switch (e.g., IR2110 LO) |
| BHI (Pin 18) | Phase B high-side driver output | Active-high digital output controlling external high-side switch for phase B |
| BLOW (Pin 19) | Phase B low-side driver output | Active-high digital output controlling external low-side switch for phase B |
| CHI (Pin 20) | Phase C high-side driver output | Active-high digital output controlling external high-side switch for phase C |
| CLOW (Pin 21) | Phase C low-side driver output | Active-high digital output controlling external low-side switch for phase C |
| DIR_IN (Pin 22) | Direction command input | Logic input selecting forward/reverse commutation sequence; matches DIR_OUT polarity during motoring |
| QUAD (Pin 23) | Quadrant select input | High = four-quadrant (modulates both high/low sides); Low = two-quadrant (modulates low side only) |
| BRAKE (Pin 24) | Brake command input | Active-high input forcing all low-side outputs ON and high-side outputs OFF for dynamic braking |
| COAST (Pin 25) | Coast command input | Hysteretic comparator input disabling all outputs above 1.75 V; used for bus overvoltage clamp |
| HALLC (Pin 26) | Rotor position input C | One of three 120°-spaced Hall sensor inputs; requires external pull-up to VREF |
| HALLB (Pin 27) | Rotor position input B | One of three 120°-spaced Hall sensor inputs; requires external pull-up to VREF |
| HALLA (Pin 28) | Rotor position input A | One of three 120°-spaced Hall sensor inputs; requires external pull-up to VREF |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Hall decoder with direction detection | Directly accepts 120° Hall inputs and outputs decoded AHI/ALOW/BHI/BLOW/CHI/CLOW plus DIR_OUT |
| Configurable two-/four-quadrant PWM modulation | QUAD pin selects low-side-only (two-quadrant) or full-bridge (four-quadrant) chopping to match torque reversal requirements |
| Reconstructed bidirectional current sensing | On-chip differential amplifier + absolute-value circuit delivers IOUT = 5×|ISNS_I − ISNS_NI| for protection and current loop closure |
| Variable-duty-cycle tachometer output | TACH_OUT frequency ∝ RPM; on-time programmable via R_TACH/C_TACH for flexible speed feedback scaling |
| Synchronized oscillator architecture | SYNCH input allows alignment of PWM timing to system master clock, reducing EMI in multi-controller systems |
Applications
| Industrial Servo Drives | Automated HVAC Blower Systems |
|---|---|
Use Scenario: Closed-loop speed and torque control of PMSM motors in CNC machine axes and robotic joints. IC Role / Device Role / Timing Role: Motor controller IC providing Hall-based commutation, current-sense feedback, and synchronized PWM generation. Use Value: Enables precise motion control with ±3% tachometer accuracy and 5-V reference stability for consistent Hall biasing across temperature. | Use Scenario: Variable-speed fan control in commercial HVAC units using three-phase BLDC motors. IC Role / Device Role / Timing Role: Central motor controller managing Hall decoding, PWM modulation, and brake/coast commands for energy-efficient airflow regulation. Use Value: QUAD-selectable operation allows cost-optimized two-quadrant design for unidirectional fans or full four-quadrant support for reversible duct systems. |
| Medical Infusion Pumps | Electric Power Steering (EPS) Subsystems |
Use Scenario: High-reliability, low-noise motor control in portable infusion pumps requiring smooth flow rate delivery. IC Role / Device Role / Timing Role: Safety-critical motor controller delivering precise current-limited acceleration/deceleration via IOUT feedback and OC_REF thresholding. Use Value: Integrated pulse-by-pulse overcurrent protection and ±200 mA output drive eliminate need for external current-limiting circuitry. | Use Scenario: Assist-torque motor control in automotive EPS modules where rapid torque reversal and fault response are essential. IC Role / Device Role / Timing Role: Real-time motor controller executing four-quadrant commutation, direction-aware tach feedback, and hardware BRAKE activation. Use Value: DIR_IN/DIR_OUT interface enables closed-loop direction validation, while COAST input supports fail-safe bus voltage clamping during regenerative events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar motor controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC3626DW | SOIC-28 package; identical electrical specs and pinout; same 0°C to 70°C rating | Preferred where board space permits larger SOIC footprint and hand-soldering is required | Select UCC3626DW for prototyping or low-volume assembly where TSSOP reflow constraints exist |
| UCC2626PW | Same TSSOP-28 package but rated for –40°C to 85°C; otherwise functionally identical | Required for extended-temperature industrial or outdoor motor control deployments | Choose UCC2626PW when operating ambient exceeds 70°C or automotive-grade temp range is mandated |
Compared with UCC3626PWTRG4, UCC3626DW offers identical functionality in a larger SOIC package suited for manual assembly, while UCC2626PW extends temperature range to –40°C to 85°C for harsh environments - neither is pin-compatible with unrelated motor drivers like DRV8301 or MC33035.
Availability
UCC3626PWTRG4 is available at Aetrix Electronics and suitable for industrial servo drives, automated HVAC blower systems, and medical infusion pumps requiring stable component supply and long-term production continuity.
Supply support for UCC3626PWTRG4 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.
The UCC3626PWTRG4 belongs to TI's legacy motor control IC product line, designed specifically for cost-sensitive, Hall-sensor-based three-phase BLDC motor systems requiring integrated commutation logic and analog feedback interfaces.
FAQ
What is the operating temperature range specified for the UCC3626PWTRG4?
The UCC3626PWTRG4 is rated for 0°C to 70°C ambient operation - this distinguishes it from the UCC2626 variant, which supports –40°C to 85°C. The temperature grade is defined by the "3" prefix in the part number and applies strictly to the UCC3626PWTRG4 device shipped in TSSOP-28 packaging.
How does the QUAD input affect PWM output behavior in the UCC3626PWTRG4?
When QUAD = 0, the UCC3626PWTRG4 modulates only the low-side outputs (ALOW/BLOW/CLOW) while holding high-side outputs static - enabling two-quadrant operation. When QUAD = 1, both high- and low-side outputs are PWM-modulated, allowing controlled torque reversal in quadrants II and IV. This configuration is critical for avoiding uncontrolled circulating currents during direction change.
Can the UCC3626PWTRG4 directly drive MOSFET gates without external gate drivers?
No, the UCC3626PWTRG4 does not integrate high-voltage gate drivers. Its AHI/ALOW/BHI/BLOW/CHI/CLOW outputs are logic-level (0–12 V), rated for ±200 mA, and require external high- and low-side gate drivers such as the IR2110 or similar to interface with N-channel MOSFETs in a three-phase bridge configuration.
What is the function of the IOUT pin on the UCC3626PWTRG4?
The IOUT pin on the UCC3626PWTRG4 delivers the output of the integrated current-sense amplifier and absolute-value circuit: IOUT = 5 × |ISNS_I − ISNS_NI|. This signal represents the magnitude of motor phase current regardless of direction, enabling both pulse-by-pulse overcurrent protection and analog current loop closure in four-quadrant applications.
Is the UCC3626PWTRG4 compatible with 60° Hall sensor outputs?
The UCC3626PWTRG4 is designed for 120° Hall encoding. To use 60° Hall sensors, an external logic converter (e.g., discrete transistor network per Figure 1 in SLUS318B) must translate the 60° code into valid 120° sequences before connecting to HALLA/HALLB/HALLC. Direct connection of 60° outputs will result in incorrect commutation.
UCC3626PWTRG4 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
UCC3626PWTRG4 FAQ
1.How can I place an order for UCC3626PWTRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC3626PWTRG4 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 UCC3626PWTRG4 reliable?
The price and inventory of UCC3626PWTRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC3626PWTRG4 is usually 5 days.
3.What payment methods are accepted for UCC3626PWTRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC3626PWTRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC3626PWTRG4?
UCC3626PWTRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC3626PWTRG4 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 UCC3626PWTRG4?
For technical support, including UCC3626PWTRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC3626PWTRG4 requirements.
6.How does Aetrix verify that UCC3626PWTRG4 is sourced from the original manufacturer or authorized distributors?
All UCC3626PWTRG4 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 UCC3626PWTRG4 meets industry standards.
7.What is the process for return or replacement of UCC3626PWTRG4?
All UCC3626PWTRG4 units undergo pre-shipment inspection (PSI). If there is an issue with UCC3626PWTRG4, 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 UCC3626PWTRG4 part is unused and in its original packaging.
Return procedure for UCC3626PWTRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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