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Texas Instruments UC2625DWTR
- Part No.:
- UC2625DWTR
- Manufacturer:
- Texas Instruments
- Category:
- Motor Drivers, Controllers
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
UC2625DWTR.pdf
- Description:
- IC MOTOR DRIVER 10V-18V 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,410
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Product details
Overview
UC2625DWTR from Texas Instruments is a brushless DC motor controller IC designed for closed-loop voltage- or current-mode PWM motor control in industrial and embedded motion systems. It integrates high-side (50-V open-collector) and low-side (push-pull) gate drivers, a high-speed current-sense amplifier with ideal diode, latched soft-start, tachometer output, and programmable cross-conduction protection. It operates across –40°C to +105°C and supports two- or four-quadrant operation for bidirectional control and braking.
For engineers reviewing the UC2625DWTR datasheet, UC2625DWTR pinout, UC2625DWTR application, or UC2625DWTR equivalent, key selection considerations include its 40–60 kHz oscillator frequency range, ±0.2 V peak-current threshold, 5 V trimmed reference, 2.5 V level-shifted current sense input, and SOIC-28 package compatibility with Hall-effect sensor interfacing and external MOSFET/Darlington power stages.
Technical Context
The UC2625DWTR implements fixed-frequency PWM control using an internal RC oscillator (RC-OSC pin), with programmable frequency via ROSC and COSC. Its position decoder accepts three 120°-spaced Hall sensor inputs (H1–H3) and translates them into six-phase drive signals (PUA/PUB/PUC and PDA/PDB/PDC) with built-in direction latch and shift register for safe reversal.
It features dual current sensing: pulse-by-pulse via ISENSE1/ISENSE2 differential inputs (gain ≈2, level shift ≈2.5 V), and average current sensing enabled in four-quadrant mode. Over-voltage, under-voltage, and over-current protections are hardware-latched, and RC-BRAKE enables controlled braking by forcing all low-side drivers active while disabling high-side outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator Frequency | 40–60 kHz typical; sets PWM timing base and commutation rate via ROSC/COSC network. |
| Operating Temperature | –40°C to +105°C; qualified for industrial-grade embedded motor control applications. |
| Reference Voltage | 4.9–5.1 V at VREF; supplies stable 5 V for Hall sensors and external circuitry with ≤30 mA load. |
| Peak Current Threshold | 0.14–0.26 V at ISENSE; triggers pulse-by-pulse current limiting to protect windings and power devices. |
| High-Side Driver Voltage | 50 V max open-collector rating; drives P-channel MOSFETs or Darlingtons directly or via level-shifting circuits. |
| Low-Side Driver Output | 0.5 A peak push-pull capability; actively pulls high to turn on N-channel low-side switches. |
| Tachometer Output | 5 V logic-level pulses on TACH-OUT; average voltage proportional to motor speed for closed-loop feedback. |
| Cross-Conduction Protection | Hardware-implemented deadtime ≥25 µs; prevents shoot-through via direction latch and flip-flop interlocks. |
Pinout & Package
UC2625DWTR is housed in a 28-pin SOIC (DW) package with 1.27 mm pitch, surface-mount footprint, and thermal performance suitable for industrial motor drive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 28, 27, 26 | E/A IN(+), E/A IN(–), E/A OUT, PWM IN | Error amplifier inputs/output and PWM comparator input; support voltage- or current-mode control loops with unity-gain stability. |
| 3, 4, 5 | ISENSE, ISENSE1, ISENSE2 | Differential current sense inputs with 2× gain and 2.5 V level shift; enable pulse-by-pulse or average current regulation. |
| 6, 7 | DIR, SPEED-IN | Direction latch control and speed-dependent direction lock; inhibits reversal when motor speed exceeds ~250 mV threshold. |
| 8, 9, 10 | H1, H2, H3 | Hall sensor inputs with TTL-compatible thresholds and internal pull-ups; decode rotor position for 6-step commutation. |
| 11 | PWR VCC | Power supply for low-side drivers; carries PD output current and supports Baker-clamped Darlingtons. |
| 12–14 | PDA, PDB, PDC | Active-high low-side driver outputs; deliver up to 0.5 A peak to N-channel MOSFET gates or Darlington bases. |
| 16–18 | PUA, PUB, PUC | Active-low 50-V open-collector high-side drivers; interface to P-MOSFETs, PNP Darlingtons, or isolated gate drivers. |
| 19 | VCC | Main supply input (10–18 V); includes under-voltage lockout (turn-on at 8.95 V typical) and bypassing requirement (0.1 µF). |
| 20 | TACH-OUT | Open-drain tachometer output; generates fixed-width pulses per commutation for speed feedback and averaging. |
| 21 | RC-BRAKE | Brake mode activation input; pulls below 1.0 V to engage controlled braking via low-side-only conduction. |
| 22 | QUAD SEL | Two- vs. four-quadrant operation select; high enables full H-bridge control for equal acceleration/deceleration. |
| 23 | OV-COAST | Over-voltage shutdown or coast command input; TTL/CMOS compatible with hysteresis for noise immunity. |
| 24 | SSTART | Soft-start clamp node; discharges external capacitor during fault to force orderly restart and prevent inrush. |
| 25 | RC-OSC | Oscillator timing node; connects to ROSC (to VREF) and COSC (to GND) to set PWM frequency. |
Key Features
| Feature | Design Value |
|---|---|
| Latched Soft Start | Prevents motor inrush by clamping error amplifier output until SSTART capacitor charges above 0.2 V. |
| Programmable Cross-Conduction Protection | Hardware-enforced 25–50 µs deadtime between complementary PU/PD outputs eliminates shoot-through risk. |
| High-Speed Current-Sense Amplifier | 2× gain with 2.5 V level shift enables direct connection to shunt resistors without external op-amps or bias networks. |
| Direction Latch with Speed Lock | Blocks DIR changes when SPEED-IN > 250 mV, ensuring safe reversal only at near-zero speed to avoid back-EMF damage. |
| Two- and Four-Quadrant Operation | Selectable via QUAD SEL pin; two-quadrant improves efficiency in unidirectional loads, four-quadrant enables servo-grade bidirectional control. |
| Tachometer Output with Noise Blanking | TACH-OUT pulses synchronized to Hall transitions, with 50–100 µs blanking window to reject commutation noise. |
Applications
| Industrial CNC Spindle Control | Automated Guided Vehicle (AGV) Drive |
|---|---|
|
Use Scenario: Precise speed and torque regulation of 3-phase BLDC spindles in machining centers requiring rapid acceleration and deceleration cycles. IC Role / Device Role / Timing Role: UC2625DWTR serves as the core commutation and PWM controller, interpreting Hall feedback and generating synchronized gate drive signals with programmable deadtime. Use Value: Enables four-quadrant operation for regenerative braking and smooth direction reversal, reducing mechanical wear and improving positional accuracy. |
Use Scenario: Bidirectional traction control of AGV drive motors operating in variable-load warehouse environments with frequent start/stop cycles. IC Role / Device Role / Timing Role: UC2625DWTR acts as the motor phase sequencer and current regulator, using DIR/SPEED-IN latching to prevent unsafe reversal during motion. Use Value: Integrated over-current and over-voltage protection ensures robustness against battery transients and motor stall conditions in mobile robotics. |
| Brushless Fan Controller for HVAC Systems | Medical Infusion Pump Motor Drive |
|
Use Scenario: Low-noise, energy-efficient speed control of large-diameter BLDC fans in commercial HVAC units with analog or PWM speed commands. IC Role / Device Role / Timing Role: UC2625DWTR functions as the closed-loop voltage-mode PWM controller, using RC-OSC to set fixed switching frequency and VREF to power Hall sensors. Use Value: 40–60 kHz oscillator range avoids audible noise while maintaining efficient MOSFET switching and thermal management. |
Use Scenario: Highly reliable, low-jitter motor control for precision peristaltic pumps delivering critical IV fluids in hospital settings. IC Role / Device Role / Timing Role: UC2625DWTR provides pulse-by-pulse current limiting and tachometer-based speed verification to meet IEC 60601 safety requirements. Use Value: Latched soft-start and hardware fault responses (e.g., OV-COAST shutdown) eliminate uncontrolled motor behavior during power-up or fault events. |
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 |
|---|---|---|---|
| UC3625DWTR | Commercial temperature range (0°C to +70°C); identical pinout, functionality, and electrical specs except temp grade. | Targeted for non-industrial environments where extended temperature operation is not required. | Select UC3625DWTR only if ambient operating temperature remains within 0–70°C and cost sensitivity outweighs industrial qualification needs. |
| DRV8301HDDCR | Integrated gate drivers + current shunt amplifiers + buck converter; 3.3 V logic interface; no Hall decoder or tach output. | Requires external MCU for commutation logic; suited for field-oriented control (FOC) rather than Hall-based trapezoidal control. | Choose DRV8301HDDCR when implementing sensorless or encoder-based FOC with microcontroller coordination, not standalone Hall-driven control. |
Compared with UC3625DWTR, the UC2625DWTR offers extended temperature reliability for industrial deployment, while DRV8301HDDCR shifts system complexity to software but reduces external component count for advanced control architectures.
Availability
UC2625DWTR is available at Aetrix Electronics and suitable for industrial motor control, automated machinery, and medical device applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for UC2625DWTR 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 UC2625DWTR belongs to TI's UCx625 family of integrated BLDC controllers, designed specifically for cost-sensitive, high-reliability industrial motion systems requiring Hall-sensor-based commutation and hardware-level safety features.
FAQ
What is the operating temperature range of the UC2625DWTR?
The UC2625DWTR is characterized for operation from –40°C to +105°C, making it suitable for industrial environments where ambient temperatures exceed commercial-grade limits. This specification is explicitly defined in the Absolute Maximum Ratings table of the SLUS353C datasheet and distinguishes it from the UC3625DWTR (0°C to +70°C) and UC1625DWTR (–55°C to +125°C). The UC2625DWTR maintains full functionality-including oscillator stability, current sense accuracy, and driver output capability-across this full range.
How does the UC2625DWTR implement safe direction reversal?
The UC2625DWTR uses a hardware direction latch combined with SPEED-IN monitoring to prevent unsafe reversal. When SPEED-IN voltage exceeds ~250 mV-indicating measurable motor rotation-the latch becomes opaque, blocking DIR input changes. Only when speed drops below this threshold does the latch become transparent again. Additionally, a two-bit shift register clocked by the PWM oscillator enforces a minimum 25–50 µs delay between direction commands, ensuring sufficient time for back-EMF decay before commutation. This dual mechanism is intrinsic to the UC2625DWTR's architecture and requires no external logic.
Can the UC2625DWTR drive N-channel MOSFETs on both high-side and low-side?
The UC2625DWTR natively supports N-channel MOSFETs on the low-side via its push-pull PDA/PDB/PDC outputs, but its high-side drivers (PUA/PUB/PUC) are open-collector and rated for 50 V-intended for P-channel MOSFETs or level-shifted N-channel drive. To use N-channel MOSFETs on the high-side, external circuitry such as charge pumps, optocouplers (e.g., with UC3725), or transformer-isolated gate drivers (as shown in Figure 14 of SLUS353C) is required. The UC2625DWTR itself does not provide bootstrap or high-side floating supply generation.
What is the function of the RC-BRAKE pin on the UC2625DWTR?
The RC-BRAKE pin on the UC2625DWTR serves two distinct functions: (1) As a tachometer timing node-when connected to RT and CT, it sets brake pulse width and tachometer on-time via T ≈ 0.67 × RT × CT; (2) As a brake activation input-pulling RC-BRAKE below 1.0 V forces the UC2625DWTR into brake mode, turning off all high-side drivers (PUA/PUB/PUC) and enabling all low-side drivers (PDA/PDB/PDC) for dynamic braking. In this mode, current sensing remains active, allowing controlled braking if ISENSE is configured for average current measurement.
Does the UC2625DWTR include an integrated oscillator, and how is its frequency set?
Yes, the UC2625DWTR includes an internal RC oscillator tied to the RC-OSC pin (pin 25). Oscillator frequency is set externally using a resistor (ROSC) from RC-OSC to VREF and a capacitor (COSC) from RC-OSC to GND, following the approximation F ≈ 2 / (ROSC × COSC). Typical values yield 40–60 kHz, and the datasheet confirms stable operation with ROSC = 20 kΩ and COSC = 2 nF. The RC-OSC pin also provides a 1.2 Vpp ramp centered at ~1.6 V, usable for slope compensation in current-mode control or as a PWM ramp source.
UC2625DWTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- Parallel
- Technology:
- Power MOSFET, Power Darlington
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- -
- Voltage - Supply:
- 10V ~ 18V
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 105°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOIC
UC2625DWTR FAQ
1.How can I place an order for UC2625DWTR through Aetrix?
Please submit a Request for Quotation (RFQ) for UC2625DWTR 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 UC2625DWTR reliable?
The price and inventory of UC2625DWTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UC2625DWTR is usually 5 days.
3.What payment methods are accepted for UC2625DWTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UC2625DWTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UC2625DWTR?
UC2625DWTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UC2625DWTR 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 UC2625DWTR?
For technical support, including UC2625DWTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UC2625DWTR requirements.
6.How does Aetrix verify that UC2625DWTR is sourced from the original manufacturer or authorized distributors?
All UC2625DWTR 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 UC2625DWTR meets industry standards.
7.What is the process for return or replacement of UC2625DWTR?
All UC2625DWTR units undergo pre-shipment inspection (PSI). If there is an issue with UC2625DWTR, 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 UC2625DWTR part is unused and in its original packaging.
Return procedure for UC2625DWTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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