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Melexis Technologies NV US168KLD-AAA-000-RE
- Part No.:
- US168KLD-AAA-000-RE
- Manufacturer:
- Melexis Technologies NV
- Category:
- Motor Drivers, Controllers
- Package:
- 6-XFDFN Exposed Pad
- Datasheet:
-
US168KLD-AAA-000-RE.pdf
- Description:
- 1-COIL FAN DRIVER 1.8 6.5V LOW
- Quantity:
- Payment:
- Shipping:
Inventory:3,776
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Product details
Overview
US168KLD-AAA-000-RE from Melexis is a single-coil brushless DC (BLDC) fan driver IC with integrated Hall sensor, soft-switching linear control, 1.8–6.5 V supply range, tachometer (FG) output, and ultra-thin UTDFN-6 (1.5 × 2 mm, 0.4 mm height) package. It enables low-noise, low-EMI cooling in space-constrained consumer and automotive-on-board fans.
For engineers reviewing the US168KLD-AAA-000-RE datasheet, pinout, applications, or equivalent options, key selection factors include its linear soft-switching architecture, integrated rotor lock/thermal protection with auto-restart, reverse voltage tolerance, and compatibility with PCB-embedded coil fan designs under 10 mm total height.
Technical Context
The US168KLD-AAA-000-RE implements linear soft-switching to eliminate PWM-related EMI and acoustic noise, unlike conventional square-wave BLDC drivers. Its integrated Hall sensor provides commutation feedback without external latching elements.
It operates as a full-bridge driver with internal current path control, supports tachometer signal generation (FG), and embeds three independent protection mechanisms: reverse voltage protection, locked rotor detection with auto-restart, and thermal shutdown with auto-restart - all requiring no external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 6.5 V - enables direct operation from single-cell Li-ion or 3.3/5 V rails without LDO. |
| Driver Topology | Full-bridge linear driver - delivers smooth current transitions for zero EMI switching noise and minimal acoustic vibration. |
| Integrated Sensor | High-sensitivity Hall sensor - provides precise rotor position sensing for single-coil commutation without external magnet biasing. |
| Tachometer Output | FG signal (open-drain) - delivers pulse-per-revolution feedback compatible with standard fan speed monitoring circuits. |
| Package | UTDFN-6 (1.5 × 2 mm, 0.4 mm height) - allows integration into ultra-thin fans (<10 mm total height) and PCB-embedded coil assemblies. |
| Protections | Reverse voltage, locked rotor, and thermal - all with auto-restart; eliminates need for external protection circuitry or system-level fault handling. |
Pinout & Package
US168KLD-AAA-000-RE is housed in a 6-pin ultra-thin dual flat no-lead (UTDFN) package with 0.4 mm profile, 1.5 mm × 2.0 mm footprint, and wettable flank terminations. Pin numbering follows standard UTDFN-6 top-view convention (pin 1 marked by dot).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Accepts 1.8–6.5 V; powers internal regulator, Hall sensor, and driver stages. |
| GND | Ground reference | Common return for supply, sensor, and output stage; must be low-impedance for stable Hall operation. |
| OUTP | Bridge high-side output | Drives one terminal of single-coil motor; linearly modulated during commutation. |
| OUTN | Bridge low-side output | Drives opposite terminal of single-coil motor; complements OUTP for full-bridge current reversal. |
| FG | Tachometer output | Open-drain pulse output synchronized to motor rotation (1 pulse per revolution); requires external pull-up. |
| NC | No-connect terminal | Internally unconnected; must remain floating - not tied to VDD, GND, or any other node. |
Key Features
| Feature | Design Value |
|---|---|
| Linear soft-switching | Eliminates PWM harmonics and associated EMI, enabling automotive EMC compliance without external filters. |
| Integrated Hall sensor | Enables self-commutated single-coil BLDC operation without external latch or timing components. |
| Ultra-thin UTDFN-6 package | 0.4 mm height and 3 mm² footprint allow mechanical integration into sub-10 mm fan assemblies and PCB-embedded coils. |
| Three-fold protection system | Reverse voltage, locked rotor, and thermal faults each trigger safe shutdown and automatic recovery - no firmware or external supervision required. |
| No external components | Full functionality achieved with only decoupling capacitor on VDD; reduces BOM count and layout area. |
Applications
| Automotive Cabin Ventilation Fan | Ultra-Thin Laptop Cooling Fan |
|---|---|
Use Scenario: Driving compact axial fans in HVAC ducts and seat ventilation modules where acoustic comfort and EMC compliance are critical. IC Role / Device Role / Timing Role: Single-chip BLDC fan driver with integrated Hall commutation and FG feedback for closed-loop speed control. Use Value: Soft-switching eliminates audible coil whine and avoids costly EMI filter components required for PWM-based alternatives. | Use Scenario: Powering <10 mm tall cooling fans in ultrabooks and tablets with PCB-embedded motor windings. IC Role / Device Role / Timing Role: Full-bridge linear driver enabling direct integration into ultra-low-profile fan stacks using embedded coil PCBs. Use Value: 0.4 mm UTDFN-6 package matches mechanical constraints while maintaining robust thermal and fault protection. |
| Smart Home Thermostat Fan | Industrial Human-Machine Interface (HMI) Cooling |
Use Scenario: Silent airflow generation in wall-mounted thermostats where fan noise directly impacts user experience. IC Role / Device Role / Timing Role: Low-voltage (1.8–6.5 V) BLDC driver with auto-restart on stall, ensuring continuous operation during dust-clogged conditions. Use Value: Locked rotor protection + thermal auto-restart prevents permanent failure and service calls in sealed enclosures. | Use Scenario: Cooling touchscreens and processor modules in factory-floor HMIs exposed to variable ambient temperatures. IC Role / Device Role / Timing Role: Fan controller with thermal shutdown and restart, operating across extended industrial temperature range without derating. Use Value: Integrated thermal protection maintains fan uptime during transient overtemperature events without host MCU intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-coil BLDC fan driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ALLEGRO A89337KESJTR-T | Switch-mode (PWM) full-bridge driver with external Hall sensor interface; higher efficiency but generates EMI requiring filtering. | Requires external Hall latch and EMI filters; unsuitable for ultra-thin or acoustically sensitive fan designs. | Select when power efficiency > acoustic/EMI performance and board space allows filtering components. |
| ON Semiconductor NCP170B | Low-dropout linear regulator with enable, not a motor driver; lacks Hall sensor, bridge outputs, or FG signal. | Cannot drive motors; only suitable for powering other fan driver ICs, not as direct functional replacement. | Not functionally equivalent; consider only for auxiliary supply rail generation in multi-IC fan systems. |
Compared with A89337KESJTR-T and NCP170B, US168KLD-AAA-000-RE uniquely combines linear soft-switching, integrated Hall sensing, and ultra-thin packaging - enabling silent, filter-free, space-optimized single-coil BLDC fan control where acoustic and mechanical constraints dominate.
Availability
US168KLD-AAA-000-RE is available at Aetrix Electronics and suitable for automotive cabin ventilation, ultra-thin laptop cooling, smart home thermostat airflow, and industrial HMI thermal management requiring stable component supply and long-term design-in support.
Supply support for US168KLD-AAA-000-RE 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
Melexis is a Belgian semiconductor company specializing in sensor and driver ICs for automotive, industrial, and consumer applications, with core expertise in magnetic sensing and precision analog front-ends.
The US168KLD-AAA-000-RE belongs to Melexis' single-coil BLDC fan driver product line, designed specifically to replace noisy, EMI-prone PWM drivers in mechanically constrained, acoustically sensitive cooling applications.
FAQ
What is the operating voltage range of the US168KLD-AAA-000-RE?
The US168KLD-AAA-000-RE operates from 1.8 V to 6.5 V, supporting direct connection to single-cell Li-ion batteries, 3.3 V logic rails, and 5 V USB-powered systems. This wide range ensures compatibility across portable, automotive, and industrial low-voltage fan applications without external regulation. The US168KLD-AAA-000-RE maintains full functionality-including Hall sensing, soft-switching, and protection features-across this entire supply range.
Does the US168KLD-AAA-000-RE require external components for basic operation?
No, the US168KLD-AAA-000-RE requires only a single 1 µF ceramic decoupling capacitor on the VDD pin for stable operation. It integrates the Hall sensor, full-bridge driver, tachometer generator, and all protection circuitry-eliminating external latches, resistors, capacitors, or diodes needed by competing solutions. This minimizes BOM cost and PCB area while simplifying layout validation for the US168KLD-AAA-000-RE.
How does the US168KLD-AAA-000-RE achieve low acoustic noise?
The US168KLD-AAA-000-RE uses linear soft-switching instead of PWM to control motor current, avoiding abrupt current transitions that cause coil vibration and audible whine. Combined with precise Hall-based commutation timing, this results in smooth torque delivery and near-silent operation-even at low speeds. The US168KLD-AAA-000-RE's architecture inherently suppresses both acoustic noise and EMI without external filters.
What protection features are built into the US168KLD-AAA-000-RE?
The US168KLD-AAA-000-RE integrates reverse voltage protection (up to –16 V), locked rotor detection with auto-restart, and thermal shutdown with auto-restart. Each protection activates independently and recovers automatically once the fault condition clears-no host MCU intervention or external circuitry required. These safeguards ensure robust field operation of the US168KLD-AAA-000-RE in sealed or dusty environments.
Can the US168KLD-AAA-000-RE drive motors with PCB-embedded coils?
Yes, the US168KLD-AAA-000-RE is explicitly designed for use with single-coil BLDC motors having windings embedded directly into the PCB. Its ultra-thin UTDFN-6 package (0.4 mm height) and linear driving architecture allow mechanical integration into fan stacks under 10 mm total height. The US168KLD-AAA-000-RE's low-voltage operation and FG output further support seamless interfacing with such compact, custom-coil assemblies.
US168KLD-AAA-000-RE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Melexis Technologies NV
- Series:
- -
- Package/Case:
- 6-XFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- Brushless DC (BLDC)
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (2)
- Interface:
- On/Off
- Technology:
- -
- Step Resolution:
- -
- Applications:
- Fan Motor Driver
- Current - Output:
- 350mA
- Voltage - Supply:
- 1.8V ~ 6.5V
- Voltage - Load:
- 1.8V ~ 6.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-UTDFN (2x1.5)
US168KLD-AAA-000-RE FAQ
1.How can I place an order for US168KLD-AAA-000-RE through Aetrix?
Please submit a Request for Quotation (RFQ) for US168KLD-AAA-000-RE 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 US168KLD-AAA-000-RE reliable?
The price and inventory of US168KLD-AAA-000-RE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for US168KLD-AAA-000-RE is usually 5 days.
3.What payment methods are accepted for US168KLD-AAA-000-RE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for US168KLD-AAA-000-RE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for US168KLD-AAA-000-RE?
US168KLD-AAA-000-RE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your US168KLD-AAA-000-RE 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 US168KLD-AAA-000-RE?
For technical support, including US168KLD-AAA-000-RE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your US168KLD-AAA-000-RE requirements.
6.How does Aetrix verify that US168KLD-AAA-000-RE is sourced from the original manufacturer or authorized distributors?
All US168KLD-AAA-000-RE 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 US168KLD-AAA-000-RE meets industry standards.
7.What is the process for return or replacement of US168KLD-AAA-000-RE?
All US168KLD-AAA-000-RE units undergo pre-shipment inspection (PSI). If there is an issue with US168KLD-AAA-000-RE, 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 US168KLD-AAA-000-RE part is unused and in its original packaging.
Return procedure for US168KLD-AAA-000-RE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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