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Texas Instruments UC2625DWG4
- Part No.:
- UC2625DWG4
- Manufacturer:
- Texas Instruments
- Category:
- Motor Drivers, Controllers
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
UC2625DWG4.pdf
- Description:
- IC MOTOR DRIVER 10V-18V 28SOIC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
UC2625DWG4 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 UC2625DWG4 datasheet, UC2625DWG4 pinout, UC2625DWG4 application, or UC2625DWG4 equivalent, this page delivers verified technical context on Hall-sensor-based commutation, pulse-by-pulse/average current sensing, RC-oscillator frequency programming, direction latch safety logic, and high-voltage driver interface design - all critical for BLDC motor drive validation and layout.
Technical Context
The UC2625DWG4 implements sensor-based commutation using three Hall-effect inputs (H1–H3) with TTL-compatible thresholds and internal noise-blanking latches synchronized to the PWM oscillator. Its position decoder drives six independent outputs (PUA/PUB/PUC and PDA/PDB/PDC) with programmable cross-conduction prevention via dual-cycle flip-flop inhibition logic.
It features dual current sensing: ISENSE1/ISENSE2 feed a fixed-gain (1.95 V/V typ), level-shifted (2.5 V) absolute-value amplifier enabling both peak-current limiting (0.20 V threshold) and overcurrent shutdown (0.30 V threshold); SSTART provides soft-start clamping of E/A OUT, while RC-OSC sets oscillator frequency (40–60 kHz typ) via ROSC and COSC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator Frequency | 40–60 kHz typical; set by ROSC (20 kΩ) and COSC (2 nF); enables stable PWM timing for motor phase chopping. |
| Operating Temperature | –40°C to +105°C; qualified for industrial-grade embedded motor control without derating. |
| High-Side Driver Voltage | 50 V max open-collector output; supports direct drive of P-channel MOSFETs or level-shifted N-channel topologies. |
| Current Sense Gain | 1.95 V/V typical with 2.5 V level shift; converts differential ISENSE1–ISENSE2 into single-ended ISENSE for accurate winding current monitoring. |
| Reference Voltage | 5.0 V ±0.1 V; supplies regulated bias for Hall sensors and external circuitry; load-regulated to ±40 mV (0–20 mA). |
| Soft-Start Discharge Current | 0.1–3.0 mA; actively discharges external capacitor on SSTART to enforce controlled ramp-up after fault or power-on. |
| Tachometer Output | Pulsed 5 V CMOS signal on TACH-OUT; pulse width ~220 μs; average voltage proportional to motor speed for analog feedback. |
Pinout & Package
UC2625DWG4 is housed in a 28-pin SOIC (DW) package with 1.27 mm pitch and standard JEDEC MS-013AC footprint. Pin functions are identical across SOIC (DW), PLCC (Q), and LCC (L) packages per TI SLUS353C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (15) | Ground reference | Common return for all analog and digital circuitry; must be low-impedance connection to minimize noise coupling. |
| VCC (19) | Supply input | 10–18 V main supply; under-voltage lockout disables outputs below 7.75 V; bypass with 0.1 μF ceramic + optional 10 μF electrolytic. |
| VREF (2) | Regulated reference | 5.0 V output for Hall sensors and external circuits; requires ≥0.1 μF bypass to ground; limited to 30 mA max. |
| H1/H2/H3 (8/9/10) | Hall sensor inputs | TTL-compatible comparators with internal pull-ups; accept 120°-spaced Hall signals; require RC filtering (1 kΩ + 2 nF) for noise immunity. |
| PUA/PUB/PUC (16/17/18) | High-side drivers | 50 V open-collector, active-low outputs; drive P-MOSFET gates or Darlingtons; leakage ≤25 μA at 50 V. |
| PDA/PDB/PDC (12/13/14) | Low-side drivers | Push-pull outputs capable of 50 mA continuous; active-high; rise/fall time ≤50 ns into 1 nF load. |
| ISENSE1/ISENSE2 (3/4) | Differential current sense | Inputs to absolute-value amplifier; support ±0.5 V differential range; enable pulse-by-pulse or average current sensing. |
| RC-OSC (25) | Oscillator timing | Connect ROSC to VREF and COSC to GND; sets PWM frequency per F ≈ 2/(ROSC × COSC); internal ramp centered at 1.6 V. |
| DIR (6) | Direction command | Latched input with 0.6 V hysteresis; changes only when SPEED-IN < 250 mV; prevents unsafe reversal during high-speed rotation. |
| OV-COAST (23) | Overvoltage/coast control | Active-high TTL/CMOS input; triggers coast mode at 1.75 V threshold; provides 0.1 V hysteresis for noise rejection. |
Key Features
| Feature | Design Value |
|---|---|
| Latched direction reversal | DIR input passes through transparent latch only when SPEED-IN < 250 mV; enforces safe reversal by requiring motor deceleration first. |
| Programmable cross-conduction protection | Six output flip-flops inhibit opposing PU/PD pairs for ≥2 PWM cycles (25–50 μs at 40 kHz); eliminates shoot-through risk in H-bridge stages. |
| Two- and four-quadrant operation | QUAD SEL (22) selects mode: two-quadrant (PUs always on, PDs chopped) for efficiency; four-quadrant (all drivers chopped) for precise servo current control. |
| High-speed current-sense amplifier | Fixed 1.95 V/V gain with 2.5 V level shift; supports both peak-limiting (0.20 V threshold) and fail-safe shutdown (0.30 V threshold) without external components. |
| Integrated tachometer generator | TACH-OUT (20) pulses on each Hall transition; average voltage linearly tracks motor RPM; enables analog speed feedback with simple RC filter. |
Applications
| Industrial BLDC Servo Drives | Robotics Joint Actuators |
|---|---|
|
Use Scenario: Precision position and velocity control in CNC axes and automated assembly equipment using 3-phase BLDC motors with Hall sensors. IC Role / Device Role / Timing Role: UC2625DWG4 serves as the core commutation and PWM controller, decoding Hall signals, generating gated drive outputs, and regulating current via pulse-by-pulse sensing. Use Value: Enables closed-loop speed regulation with tachometer feedback and safe bidirectional torque delivery using four-quadrant chopping and latched DIR logic. |
Use Scenario: Compact, high-bandwidth joint motor control in collaborative robots where rapid acceleration/deceleration and regenerative braking are required. IC Role / Device Role / Timing Role: UC2625DWG4 manages real-time Hall-based commutation, implements fast-reverse braking via RC-BRAKE, and enforces cross-conduction protection during dynamic direction changes. Use Value: Delivers sub-50 μs deadtime control and programmable brake timing to prevent mechanical shock and ensure smooth motion transitions. |
| Electric Power Steering (EPS) Assist Modules | Industrial Fan & Pump Controllers |
|
Use Scenario: Torque-assist motor control in automotive EPS systems requiring functional safety, noise-immune Hall decoding, and fail-safe current limiting. IC Role / Device Role / Timing Role: UC2625DWG4 acts as the primary motor controller, interfacing with vehicle CAN bus via external MCU, executing torque commands, and monitoring winding current for overload protection. Use Value: Provides overvoltage/under-voltage lockout, 2 kV ESD protection, and robust Hall input filtering - meeting ASIL-B–relevant reliability requirements. |
Use Scenario: Variable-speed HVAC and fluid handling systems using high-efficiency BLDC fans/pumps operating continuously in harsh thermal environments. IC Role / Device Role / Timing Role: UC2625DWG4 performs fixed-frequency voltage-mode PWM control, regulates speed via analog SPEED-IN input, and maintains stable operation across –40°C to +105°C ambient. Use Value: Eliminates need for external op-amps or timers; integrated VREF, soft-start, and tach feedback reduce BOM count and improve thermal margin. |
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 |
|---|---|---|---|
| UC3625DW | Commercial temperature range (0°C to +70°C); identical pinout, functionality, and electrical specs except temp grade. | Targeted for non-industrial environments (e.g., consumer appliances, lab equipment) where extended temperature operation is not required. | Select UC3625DW only if ambient operating conditions remain within 0–70°C and military/industrial qualification is unnecessary. |
| MP6532DS-LF-Z | Monolithic 3-phase gate driver (no Hall decoder or tach); requires external MCU for commutation logic; supports 100 V max bootstrap operation. | Used in MCU-based BLDC systems where flexibility and integration density outweigh need for analog Hall interface and tach feedback. | Choose MP6532DS-LF-Z when implementing sensorless or custom-commutated designs with external microcontroller coordination. |
Compared with UC3625DW and MP6532DS-LF-Z, UC2625DWG4 uniquely combines Hall-sensor decoding, integrated tach generation, and industrial temperature rating in a single chip - eliminating external logic while ensuring robust operation in demanding embedded motion systems.
Availability
UC2625DWG4 is available at Aetrix Electronics and suitable for industrial BLDC servo drives, robotics joint actuators, electric power steering modules, and HVAC fan controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for UC2625DWG4 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 UC2625DWG4 belongs to TI's UCx625 family of integrated BLDC motor controllers, designed specifically for Hall-sensor-based, high-reliability industrial motion systems requiring analog feedback, programmable protection, and wide-temperature operation.
FAQ
What is the maximum operating voltage for UC2625DWG4 high-side drivers?
The UC2625DWG4 high-side drivers (PUA, PUB, PUC) are rated for 50 V maximum output voltage in open-collector configuration. This allows direct interface with P-channel MOSFETs or level-shifted N-channel topologies in motor phases up to 48 V DC bus. Exceeding 50 V risks permanent damage to the output transistors. The absolute maximum VCC rating remains 20 V, and all logic inputs must stay within their specified voltage ranges relative to GND.
How does UC2625DWG4 implement safe direction reversal?
The UC2625DWG4 implements safe direction reversal using a direction latch that only accepts new DIR commands when SPEED-IN voltage falls below 250 mV - indicating low motor speed. Once latched, direction changes are delayed by one to two PWM oscillator periods (25–50 μs at 40 kHz) via a shift register. This ensures mechanical energy dissipates before commutation reverses, preventing torque shock or power device failure. The latch remains inhibited during high-speed rotation.
Can UC2625DWG4 perform both peak and average current sensing?
Yes, UC2625DWG4 supports both modes. Pulse-by-pulse sensing uses ISENSE1 and ISENSE2 directly for instantaneous winding current limiting (0.20 V threshold). Average current sensing requires adding RD in the low-side circulating path (Figure D in SLUS353C) and operating in four-quadrant mode (QUAD SEL = high); the absolute-value amplifier corrects RD's negative voltage, enabling true average current regulation for smooth low-speed torque control.
What oscillator components are recommended for UC2625DWG4 at 50 kHz?
For 50 kHz nominal oscillator frequency, TI recommends ROSC = 20 kΩ connected from RC-OSC (pin 25) to VREF (pin 2), and COSC = 2 nF from RC-OSC to GND. This matches the typical value in the Electrical Characteristics table and yields stable operation with minimal jitter. Resistors between 10 kΩ and 100 kΩ and capacitors from 1 nF to 100 nF are supported, but values near the center of those ranges optimize accuracy and temperature stability.
Does UC2625DWG4 include built-in protection against cross-conduction?
Yes, UC2625DWG4 includes hardware-level cross-conduction protection. Six dedicated flip-flops track each PU/PD output state and inhibit opposing drivers for at least two PWM oscillator cycles (e.g., 25–50 μs at 40 kHz). This ensures mandatory deadtime between high-side and low-side activation in each phase leg, preventing shoot-through even during fast direction or PWM transitions - no external timing components required.
UC2625DWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
UC2625DWG4 FAQ
1.How can I place an order for UC2625DWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for UC2625DWG4 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 UC2625DWG4 reliable?
The price and inventory of UC2625DWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UC2625DWG4 is usually 5 days.
3.What payment methods are accepted for UC2625DWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UC2625DWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UC2625DWG4?
UC2625DWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UC2625DWG4 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 UC2625DWG4?
For technical support, including UC2625DWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UC2625DWG4 requirements.
6.How does Aetrix verify that UC2625DWG4 is sourced from the original manufacturer or authorized distributors?
All UC2625DWG4 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 UC2625DWG4 meets industry standards.
7.What is the process for return or replacement of UC2625DWG4?
All UC2625DWG4 units undergo pre-shipment inspection (PSI). If there is an issue with UC2625DWG4, 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 UC2625DWG4 part is unused and in its original packaging.
Return procedure for UC2625DWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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