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Product Detailed Parameters
- Description：IC MOTOR DRIVER 4.7V-30V TO92-4
- Series：-
- Mfr：Melexis Technologies NV
- Package：Bulk
- Motor Type - Stepper：-
- Motor Type - AC, DC：Brushless DC (BLDC)
- Function：Driver - Fully Integrated, Control and Power Stage
- Output Configuration：-
- Interface：On/Off
- Technology：-
- Step Resolution：-
- Applications：Fan Motor Driver
- Current - Output：250mA
- Voltage - Supply：4.7V ~ 30V
- Voltage - Load：4.7V ~ 30V
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Through Hole
- Package / Case：4-SSIP
- Supplier Device Package：TO-92-4 (flat)
- Grade：-
- Qualification：-
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Overview
The Melexis US90AEVK-AAA-000-SP is a two-coil fan driver IC designed for brushless DC motor applications. It operates within a supply voltage range of 4.5 V to 30 V and supports load voltages of 12 V and 24 V. The device features an output current capability of 20 mA with a working supply current of 2 mA. It functions reliably across an operating temperature range from -40°C to +125°C. The component utilizes a SOT-23-5 package for surface mount installation and includes integrated protection mechanisms.
Feature Summary
- Integrates high-sensitivity Hall effect sensor with dynamic offset correction for precise commutation
- Provides locked rotor protection with automatic restart functionality to enhance system reliability
- Features low-power CMOS and power MOSFET technology for efficient energy consumption
- Includes built-in output protection clamp diodes to safeguard against voltage spikes
Applications
- Brushless DC cooling fans
- HVAC system ventilation motors
- Computer case cooling solutions
- Industrial equipment thermal management
Procurement Notes
Verify the specific suffix 'VK' confirms the SOT-23-5 package variant, as the base US90A series offers multiple packaging options including SIP and SOIC8. Confirm that the 20 mA output current meets the requirements of the target dual-coil fan motor. Ensure the 4.5 V minimum supply voltage aligns with the system power rail specifications. Check for end-of-life or not-recommended-for-new-design status if applicable to long-term production plans.
Selection Notes
Select this component when a compact surface-mount solution is required for dual-coil BLDC fans. The SOT-23-5 package suits space-constrained designs compared to larger SIP or SOIC packages. Consider the 20 mA output limit for smaller fan motors. The integrated FG output facilitates speed monitoring without external components. Evaluate the -40°C to +125°C range against environmental conditions.
Part Context
This part belongs to the US90A family of single-chip solutions for driving dual-coil brushless DC fans. The series combines Hall sensing, control logic, and power drivers on one die. It leverages proprietary CMOS processes to minimize size and cost. The US90A line provides alternatives to discrete component designs, simplifying assembly and improving reliability in thermal management applications.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult official Melexis resources for direct replacements or pin-compatible alternatives within the US90A or US91A families.
