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Texas Instruments TMP814PWR
- Part No.:
- TMP814PWR
- Manufacturer:
- Texas Instruments
- Category:
- Motor Drivers, Controllers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TMP814PWR.pdf
- Description:
- IC MOTOR DRIVER 6V-16V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
TMP814PWR from Texas Instruments is a single-phase bipolar fan motor predriver IC designed to control external P-channel high-side and N-channel low-side power FETs in full-wave H-bridge configurations. It delivers variable-speed control via PWM input (25 kHz typical), integrated lock detection with automatic reset, FG speed feedback output, and 6-V Hall bias regulation. It supports 12-V, 24-V, and 48-V fan systems in server and appliance cooling applications.
For engineers reviewing the TMP814PWR datasheet, TMP814PWR pinout, TMP814PWR application, or TMP814PWR equivalent, key selection considerations include its 20-pin TSSOP package, hall-sensor-based commutation, chopper-type current limiting at startup, soft-switching reactive current cut, and VCC overvoltage protection via VOVER pin for >18-V supply rails.
Technical Context
The TMP814PWR implements a hall-input–based commutation controller with dual half-bridge gate drive outputs (OUT1P/OUT1N and OUT2P/OUT2N) optimized for bipolar single-phase motors. Its internal oscillator sets PWM frequency via CPWM capacitor (e.g., 100 pF → 25 kHz), while VTH pin enables analog or pulsed speed control across full-speed, minimum-speed, and variable-duty modes.
Functional safety features include lock detection (via CT capacitor timing), thermal shutdown, and current limiting using SENSE/VLIM differential sensing. The device integrates a 6-V regulator (6VREG) for Hall sensor bias and pull-up loads, and VOVER enables safe operation with 24-V/48-V motor supplies by clamping VCC below 18 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 6 V to 16 V - defines usable input rail for logic and gate drive; VOVER extends system voltage support to 48 V |
| fPWM (typ) | 25 kHz - fixed-frequency PWM carrier for smooth, low-audible-noise motor control |
| 6VREG Output | 6.0 V ±0.15 V @ 5 mA - stable bias for Hall sensors and external pull-ups, reducing need for auxiliary regulators |
| Output Current (OUT_P) | 20 mA sink - sufficient to drive standard MOSFET gates without external buffers |
| Lock Detection | Capacitor-timed (CT pin) - enables configurable hiccup-mode protection during rotor stall |
| Hall Input Hysteresis | 20 mV - ensures noise-immune commutation under EMI-prone fan environments |
| Thermal Resistance (RθJA) | 83 °C/W - supports continuous operation up to 95°C ambient in standard PCB layouts |
Pinout & Package
Package: 20-pin TSSOP (PW), 4.40 mm × 6.50 mm body, 0.65 mm pitch, 1.2 mm max height, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1P, OUT2P | Upper-side driver output | Drives gates of external P-channel FETs; open-drain with 20 mA sink capability |
| OUT1N, OUT2N | Lower-side driver output | Drives gates of external N-channel FETs; 10 V output swing supports logic-level FETs |
| VCC | Main supply input | Power for internal logic and gate drivers; requires ≥1 µF local decoupling |
| 6VREG | Regulated output | 6-V reference for Hall bias and pull-up resistors; load-regulated to ±2.5% from 0–5 mA |
| IN+, IN− | Hall sensor differential inputs | Comparator with 20-mV hysteresis; accepts 0.2–3 V common-mode range for robust rotor position sensing |
| FG, RD | Open-collector status outputs | FG provides speed-proportional pulse train; RD asserts low during rotation, high at stall |
| VTH | Speed control input | Analog/PWM input setting duty cycle; 0–7 V range maps to full-speed (≤1.65 V) to stop (≥4.55 V) |
| RMI | Minimum speed set | Resistor-to-6VREG sets lowest operational speed; open or tied to GND disables minimum speed |
| CPWM | Oscillator timing output | Drives external capacitor to set 18–32 kHz PWM frequency; required even in full-speed mode |
| CT | Lock detection timer | Capacitor sets lock timeout; 0.47 µF yields ~100 ms detection window before hiccup restart |
Key Features
| Feature | Design Value |
|---|---|
| Single-phase full-wave predriver | Supports bipolar motor drive with independent upper/lower FET control-enables efficient regeneration and silent operation |
| Integrated 6-V Hall bias regulator | Eliminates need for external LDO; powers Hall sensors directly from VCC with <±2.5% load regulation |
| Reactive current cut before phase change | ROFF pin configures soft-switching timing-reduces EMI and acoustic noise during commutation transitions |
| Chopper-type current limit at startup | SENSE/VLIM interface enables precise overcurrent cutoff-prevents inrush damage without external op-amps |
| VCC overvoltage protection (VOVER) | Enables direct use with 24-V/48-V motor supplies-clamps VCC ≤18 V via external Zener/resistor network |
| Automatic lock detection & reset | CT-based timing + hiccup recovery-protects FETs and motor windings during stalled conditions without manual intervention |
Applications
| Server Fan Control | Appliance Fan Drive |
|---|---|
|
Use Scenario: High-reliability 48-V cooling fans in rack-mounted servers requiring silent, thermally adaptive airflow. IC Role / Device Role / Timing Role: Pre-driver controlling external PMOS/NMOS H-bridge; uses FG feedback for closed-loop RPM regulation and RD for stall monitoring. Use Value: VOVER pin enables direct 48-V motor supply integration while maintaining 16-V VCC compliance-reducing BOM count and layout complexity. |
Use Scenario: Variable-speed blower in HVAC systems or refrigeration units operating from 24-V DC bus. IC Role / Device Role / Timing Role: Hall-commutated predriver managing motor direction and torque via VTH analog input and RMI-set minimum speed. Use Value: Reactive current cut (ROFF) and soft-start reduce mechanical stress and audible whine-improving user experience and long-term reliability. |
| Industrial Cabinet Cooling | Medical Equipment Ventilation |
|
Use Scenario: Dust-resistant, high-airflow fans in industrial control cabinets exposed to wide temperature swings (−30°C to +95°C). IC Role / Device Role / Timing Role: Motor controller with lock protection (CT), thermal shutdown, and 6VREG-powered Hall bias-ensuring fail-safe operation. Use Value: −30°C to +95°C operating range and 83 °C/W RθJA allow convection-cooled designs-eliminating need for heatsinks in space-constrained enclosures. |
Use Scenario: Low-noise, low-EMI ventilation fans in diagnostic imaging or patient-monitoring devices requiring EMC compliance. IC Role / Device Role / Timing Role: Precision predriver implementing 25-kHz PWM switching and FG-based speed verification for regulatory traceability. Use Value: 20-mV Hall hysteresis and controlled slew rates minimize conducted emissions-supporting Class B FCC/CE certification without added filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fan motor predriver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DRV10983RSMT | Three-phase BLDC predriver with integrated FETs; no external H-bridge required; higher integration but fixed 3-phase topology | Designed for brushless DC fans-not compatible with single-phase bipolar motors driven by TMP814PWR | Select only if migrating to 3-phase BLDC architecture; not a drop-in replacement for single-phase systems |
| UCC27282DR | High-speed dual low-side gate driver; no Hall interface, no speed control, no protection logic-requires full external MCU control | Suitable for custom motor control firmware stacks; lacks lock detection, FG feedback, and VTH analog interface | Choose when full design flexibility is needed and system already includes position sensing and protection algorithms |
Compared with DRV10983RSMT and UCC27282DR, the TMP814PWR uniquely combines hall-input commutation, analog speed control, lock protection, and 6-V Hall bias in a single 20-pin TSSOP-making it optimal for cost-sensitive, single-phase fan systems where minimal external components and proven reliability are critical.
Availability
TMP814PWR is available at Aetrix Electronics and suitable for server cooling, appliance ventilation, industrial cabinet fans, and medical airflow systems requiring stable component supply across extended production lifecycles.
Supply support for TMP814PWR 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, efficiency, and system-level integration.
The TMP814PWR belongs to TI's motor driver predriver product line, engineered specifically for cost-effective, low-noise, single-phase fan control in high-volume thermal management applications.
FAQ
What is the maximum motor supply voltage supported by the TMP814PWR?
The TMP814PWR itself operates from a 6-V to 16-V VCC supply, but supports motor voltages up to 48 V using the VOVER pin. VOVER enables external Zener/resistor clamping to keep VCC within its 18-V absolute maximum rating-allowing safe integration into 24-V and 48-V fan systems without level-shifting circuitry. This functionality is confirmed in Section 7.3.2 and Figure 7 of the TMP814PWR datasheet.
Does the TMP814PWR require an external microcontroller to operate?
No, the TMP814PWR operates autonomously as a hall-commutated predriver. It requires only a Hall sensor, external P/N-channel FETs, and passive components (e.g., CPWM and CT capacitors). Speed is set via analog VTH voltage or PWM signal; no firmware, clock source, or serial interface is needed. This self-contained operation is detailed in Sections 7.1 and 8.2.1 of the TMP814PWR datasheet.
How does the TMP814PWR implement lock protection and recovery?
The TMP814PWR uses the CT pin to configure lock detection timing. When rotor lock is sensed (via Hall input stall or FG absence), a constant-current circuit charges CT until 1.2 V is reached, triggering hiccup-mode shutdown. After discharge to 0 V, the device automatically restarts. This behavior is specified in Section 7.3.4 and Table 1 of the TMP814PWR datasheet, with typical 0.47 µF CT yielding ~100 ms detection window.
Can the TMP814PWR drive both P-channel high-side and N-channel low-side FETs simultaneously?
Yes-the TMP814PWR provides four dedicated gate drive outputs: OUT1P/OUT2P (upper-side, P-channel compatible) and OUT1N/OUT2N (lower-side, N-channel compatible). Its functional block diagram (Section 7.2) and truth table (Table 1) confirm complementary drive for full-wave single-phase bipolar operation, including regeneration paths during PWM off-time.
What is the purpose of the RMI pin on the TMP814PWR?
The RMI pin sets the minimum rotational speed by adjusting the lower bound of the VTH-controlled speed range. Connecting RMI to 6VREG via an external resistor defines the minimum duty cycle; leaving RMI open or tying it to 6VREG disables minimum speed (fan stops). This feature is described in Section 7.3.6 and Figure 1A of the TMP814PWR datasheet.
TMP814PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- Brushed DC
- Function:
- Controller - Speed
- Output Configuration:
- Pre-Driver - Half Bridge (2)
- Interface:
- PWM
- Technology:
- -
- Step Resolution:
- -
- Applications:
- Fan Controller
- Current - Output:
- -
- Voltage - Supply:
- 6V ~ 16V
- Voltage - Load:
- -
- Operating Temperature:
- -30°C ~ 95°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
TMP814PWR FAQ
1.How can I place an order for TMP814PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP814PWR 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 TMP814PWR reliable?
The price and inventory of TMP814PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP814PWR is usually 5 days.
3.What payment methods are accepted for TMP814PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP814PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP814PWR?
TMP814PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP814PWR 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 TMP814PWR?
For technical support, including TMP814PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP814PWR requirements.
6.How does Aetrix verify that TMP814PWR is sourced from the original manufacturer or authorized distributors?
All TMP814PWR 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 TMP814PWR meets industry standards.
7.What is the process for return or replacement of TMP814PWR?
All TMP814PWR units undergo pre-shipment inspection (PSI). If there is an issue with TMP814PWR, 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 TMP814PWR part is unused and in its original packaging.
Return procedure for TMP814PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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