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Texas Instruments DRV10974RUMR
- Part No.:
- DRV10974RUMR
- Manufacturer:
- Texas Instruments
- Category:
- Motor Drivers, Controllers
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
DRV10974RUMR.pdf
- Description:
- IC MTR DRV MULTPHS 4.4-18V 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,751
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Product details
Overview
DRV10974RUMR from Texas Instruments is a three-phase, sensorless BLDC motor driver IC with integrated MOSFETs, delivering 1-A continuous (1.5-A peak) phase current across 4.4 V–18 V input range. It implements 180° sinusoidal commutation for low acoustic noise and uses resistor-configurable lead angle, current limit, and acceleration profile. It targets compact, cost-sensitive fan, pump, and white-goods motor modules.
For engineers reviewing the DRV10974RUMR datasheet, DRV10974RUMR pinout, DRV10974RUMR application, or DRV10974RUMR equivalent, key selection considerations include its WQFN-16 package thermal performance (RθJB = 13.3°C/W), built-in current sense eliminating external shunts, open-drain FG speed feedback, and single-resistor startup configuration without motor center tap.
Technical Context
The DRV10974RUMR employs a proprietary sensorless control algorithm that estimates rotor position from back-EMF without requiring Hall sensors or motor center taps. Its 180° sinusoidal drive uses three-phase 25-kHz PWM outputs with programmable slew rate (70–170 V/μs) and 440-ns dead time to minimize torque ripple and audible noise.
Control is implemented via analog or digital PWM input (0.1–100 kHz), with auto-detection between modes; direction is set by FR pin logic level (U→V→W or U→W→V); and protection includes motor-lock detection with 5-s release time, overcurrent (2.5-A threshold), thermal shutdown (140–150°C), and UVLO on VCC, VCP, and V1P8 rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.4 V to 18 V - supports 12-V nominal systems with wide supply tolerance for battery or unregulated DC operation. |
| Continuous Phase Current | 1 A (rms) - enables direct drive of small-to-medium BLDC motors without external power stages. |
| Total H+L rDS(on) | 750 mΩ typical at 25°C - low conduction loss improves efficiency and reduces thermal load in WQFN-16 package. |
| Output PWM Frequency | 25 kHz - high switching frequency minimizes audible noise and allows smaller passive filtering components. |
| FG Output Type | Open-drain with 20-kΩ internal pullup - provides scalable speed feedback signal compatible with 3.3-V or 5-V logic interfaces. |
| Thermal Resistance (RθJB) | 13.3°C/W - superior board-level heat dissipation vs HTSSOP, critical for sustained 1-A operation in compact layouts. |
| Lead Angle Range | 10 µs to 1000 µs - adjustable via ADV pin resistor to align phase current with BEMF for optimal torque and efficiency. |
| Current Limit Range | 0.2 A to 1.6 A - configured by CS pin resistor, enabling precise motor protection without external sensing. |
Pinout & Package
DRV10974RUMR is housed in a 4.00 mm × 4.00 mm, 16-pin WQFN package with exposed thermal pad, requiring solder connection to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| U / V / W | Motor Phase Outputs | Three half-bridge outputs driving BLDC motor windings; each integrates high- and low-side MOSFETs with 0.425-Ω typical rDS(on). |
| PWM | Speed Control Input | Accepts 0.1–100 kHz digital PWM or 20 mV–1.8 V analog voltage; auto-detects mode and controls output amplitude proportionally. |
| FR | Direction Control Input | Logic-level input (0 = U→V→W, 1 = U→W→V); internal 100-kΩ pulldown ensures default forward rotation on power-up. |
| FG | Speed Feedback Output | Open-drain output toggling once per electrical cycle; frequency proportional to motor speed; requires external pullup for logic-level interface. |
| CS | Current Limit Configuration | Analog input accepting resistor divider to set 0.2–1.6 A current limit; no external sense resistor needed. |
| ADV | Lead Angle Configuration | Analog input accepting resistor to adjust timing offset (10–1000 µs) for optimal BEMF alignment and efficiency. |
| RMP | Acceleration Profile Control | Analog input accepting resistor to select one of 16 ramp-rate codes (0–15) for smooth spin-up behavior. |
| V1P8 | Internal LDO Output | 1.8-V regulated supply (±0.1 V) capable of sourcing up to 3 mA for external biasing or sensing circuits. |
| VCP | Charge Pump Output | Boosted gate-drive rail (VCC + 4 to VCC + 5.5 V) enabling full enhancement of high-side MOSFETs without external charge pump. |
| VCC | Main Power Supply | Primary input (4.4–18 V); requires 10-µF ceramic capacitor to GND for stability and transient response. |
| GND / PGND | Digital & Power Ground | Separate analog/digital ground (GND) and high-current motor ground (PGND) minimize noise coupling into control circuitry. |
| NC | No Connection | Pin 8 in WQFN package has no internal connection; must be left floating or tied to GND per layout guidelines. |
| Thermal Pad | Thermal & Electrical Reference | Exposed copper pad must be soldered to PCB ground plane with ≥4 thermal vias for RθJB = 13.3°C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in current sensing | Eliminates need for external shunt resistor and associated PCB area, signal conditioning, and calibration overhead. |
| Resistor-configurable parameters | Single low-power resistor per function (CS, ADV, RMP) enables precise tuning of current limit, lead angle, and acceleration without firmware or digital interface. |
| 180° sinusoidal commutation | Reduces pure-tone acoustic emissions versus trapezoidal drives-critical for consumer appliances and quiet environments. |
| Proprietary sensorless control | Operates without motor center tap or Hall sensors, supporting wider range of off-the-shelf BLDC motors and simplifying mechanical design. |
| Integrated charge pump (VCP) | Generates boosted gate drive internally, removing external charge-pump IC and associated capacitors for compact, low-BOM designs. |
| Low-power mode | Reduces quiescent current to 380 µA when motor is stationary, extending battery life in portable or intermittent-use applications. |
Applications
| Fan Speed Control | Refrigerator Circulation Pump |
|---|---|
Use Scenario: Variable-speed axial/centrifugal fan in HVAC or server cooling system requiring quiet, energy-efficient airflow modulation. IC Role / Device Role / Timing Role: Primary motor driver executing closed-loop speed regulation via FG feedback and PWM command, with real-time overcurrent and thermal protection. Use Value: 180° sinusoidal drive cuts acoustic noise by >10 dB vs trapezoidal alternatives; resistor-tuned lead angle maximizes efficiency across load points. | Use Scenario: Low-flow, continuous-duty circulation pump in refrigerator evaporator loop, operating 24/7 under tight thermal constraints. IC Role / Device Role / Timing Role: Integrated driver providing 1-A continuous phase current, self-commutating without position sensors, and maintaining stable speed under varying viscosity loads. Use Value: Built-in current sense and lock-detect prevent stall-induced overheating; WQFN thermal performance sustains 85°C ambient without derating. |
| BLDC Motor Module | Smart Appliance Drum Drive |
Use Scenario: Compact, plug-and-play BLDC motor module for OEM integration into washing machines, dryers, or dishwashers. IC Role / Device Role / Timing Role: Core driver IC enabling drop-in replacement of brushed motors, with simple PWM/FR/FG interface and minimal external components. Use Value: Single-resistor startup (RMP), configurable current limit (CS), and direction control (FR) reduce BOM count and qualification effort for appliance manufacturers. | Use Scenario: Direct-drive drum motor in high-end front-load washer requiring precise torque control, reversible motion, and ultra-low vibration during spin cycles. IC Role / Device Role / Timing Role: Sensorless driver executing bidirectional 180° commutation with FG-based speed verification and soft-start acceleration to prevent mechanical shock. Use Value: Resistor-configurable acceleration profile (RMP) and lead angle (ADV) allow fine-tuning of spin dynamics and spin-balance compensation without firmware changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar three-phase sensorless BLDC motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DRV10983RUMR | Higher 2-A continuous current rating; identical WQFN-16 package and pinout; adds SPI interface for advanced diagnostics and tuning. | Targets higher-power fans/pumps where 1-A limit is insufficient; SPI enables runtime parameter adjustment and fault logging not available on DRV10974RUMR. | Select DRV10983RUMR when >1-A phase current or digital configurability is required; DRV10974RUMR remains optimal for cost-sensitive, fixed-tune applications. |
| MP6532GQ-Z | Monolithic 3-A three-phase driver in QFN-24; lacks integrated charge pump (requires external bootstrap diodes/caps); no FG output or resistor-programmable lead angle. | Suited for high-current industrial blowers where size is secondary; requires more external components and lacks analog speed feedback capability. | Choose MP6532GQ-Z only if 3-A drive capability is mandatory and FG feedback/resistor tuning are unnecessary; DRV10974RUMR offers better integration for <1.5-A applications. |
Compared with DRV10983RUMR, the DRV10974RUMR trades programmability and headroom for lower cost and simpler implementation; compared with MP6532GQ-Z, it delivers superior integration (charge pump, FG, resistor tuning) in a smaller footprint but at lower current capacity.
Availability
DRV10974RUMR is available at Aetrix Electronics and suitable for fan speed control, refrigerator circulation pumps, BLDC motor modules, and smart appliance drum drives requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for DRV10974RUMR 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 company specializing in analog, embedded processing, and power management technologies, with leadership in motor control ICs for industrial and consumer applications.
The DRV10974RUMR belongs to TI's sensorless BLDC driver product line, designed specifically for cost-sensitive, low-noise, low-component-count 12-V motor systems in white goods and small appliances.
FAQ
What is the maximum continuous motor current supported by the DRV10974RUMR?
The DRV10974RUMR supports 1-A continuous (rms) phase current at TA = 85°C with proper PCB thermal design. Peak current capability is 1.5 A for short durations. This rating assumes use of the WQFN-16 package with thermally optimized layout (exposed pad soldered to ground plane with ≥4 vias) and adequate copper area per TI's recommended layout guidelines.
Does the DRV10974RUMR require an external current-sense resistor?
No, the DRV10974RUMR does not require an external current-sense resistor. It implements built-in current sensing using the MOSFET rDS(on) of its integrated power stages. The CS pin accepts a resistor to configure the current-limit threshold from 0.2 A to 1.6 A, eliminating the need for external shunts, amplifiers, or calibration.
How is motor direction controlled on the DRV10974RUMR?
Motor direction on the DRV10974RUMR is controlled via the FR (forward-reverse) pin: logic low (≤0.6 V) selects U→V→W commutation sequence (forward), and logic high (≥2.2 V) selects U→W→V (reverse). An internal 100-kΩ pulldown ensures default forward rotation at power-up if FR is left unconnected.
What package type is used for the DRV10974RUMR, and why is the thermal pad important?
The DRV10974RUMR uses a 4.00 mm × 4.00 mm, 16-pin WQFN package (RUM suffix). Its exposed thermal pad must be soldered to the PCB ground plane with ≥4 thermal vias because it serves as the primary thermal and electrical path for power dissipation-enabling the specified RθJB of 13.3°C/W and preventing thermal shutdown during continuous 1-A operation.
Can the DRV10974RUMR operate without a motor center tap?
Yes, the DRV10974RUMR operates without a motor center tap. Its proprietary sensorless control algorithm estimates rotor position solely from phase back-EMF waveforms, supporting standard three-wire BLDC motors commonly used in fans, pumps, and appliances-eliminating mechanical constraints and cost of center-tap windings.
What is the function of the V1P8 pin on the DRV10974RUMR?
The V1P8 pin on the DRV10974RUMR is the output of an internal LDO regulator providing a stable 1.8-V supply (1.7–1.9 V) with up to 3 mA of output current. It powers internal circuitry and can optionally bias external components such as hall-effect sensors or level-shifters, reducing system-level voltage regulation requirements.
DRV10974RUMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- Multiphase
- Motor Type - AC, DC:
- Brushless DC (BLDC)
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Pre-Driver - Half Bridge (3)
- Interface:
- PWM
- Technology:
- Power MOSFET
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- 1.5A
- Voltage - Supply:
- 4.4V ~ 18V
- Voltage - Load:
- 0V ~ 18V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WQFN (4x4)
DRV10974RUMR FAQ
1.How can I place an order for DRV10974RUMR through Aetrix?
Please submit a Request for Quotation (RFQ) for DRV10974RUMR 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 DRV10974RUMR reliable?
The price and inventory of DRV10974RUMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DRV10974RUMR is usually 5 days.
3.What payment methods are accepted for DRV10974RUMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DRV10974RUMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DRV10974RUMR?
DRV10974RUMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DRV10974RUMR 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 DRV10974RUMR?
For technical support, including DRV10974RUMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DRV10974RUMR requirements.
6.How does Aetrix verify that DRV10974RUMR is sourced from the original manufacturer or authorized distributors?
All DRV10974RUMR 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 DRV10974RUMR meets industry standards.
7.What is the process for return or replacement of DRV10974RUMR?
All DRV10974RUMR units undergo pre-shipment inspection (PSI). If there is an issue with DRV10974RUMR, 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 DRV10974RUMR part is unused and in its original packaging.
Return procedure for DRV10974RUMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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