MLX90285LVK-AAA-000-BU Melexis

MLX90285 24V Low Noise Two-Coil Fan Driver 1. Features and Benefits 2. Applications 1-chip solution (Hall element + Output 12V and 24V Two-Coil motors with high Drivers) mutual inductance (2-wire parallel winding method). Soft Switching for low noise Two-Stage Thermal Protection Locked Rotor Protection and auto-restart FG and RD available in 4-pin VK (No-VDD design) Pin-to-pin compatible with US90A & US91A 3. Ordering information Product Code Temperature Code Package Code Option Code Packing Form Code MLX90285 L VK ABA-000 BU MLX90285 L VK AAA-000 BU MLX90285 L DC ABA-000 RE MLX90285 L DC AAA-000 RE Legend: Temperature Code: L for Temperature Range -40C to 150C Package Code: VK for Plastic Single in Line , DC for SOIC8 (AECQ100 compliant) Option Code: AAA-000 for Frequency Generation (FG), ABA-000 for Rotation Detection (RD) Packing Form: BU for Bulk, RE for Reel (live bug) Ordering example: MLX90285LVK-ABA-000-BU 4. Functional Diagram 5. General Description The MLX90285 is a one-chip solution for driving two-coil brushless DC cooling fans. The device features Soft Switching to lower acoustic and electrical fan noise. This efficient solution is enhanced with an intelligent Active Slope Control which automatically adjusts the slope duration depending on the fan rotation speed. Thus, the fan performance to noise ratio is always kept optimum without the need of tuning via external component. The device includes a novel Two-Stage Thermal Protection as well as Locked Rotor Protection for demanding application safety requirements. Frequency Generator or Rotation Detection is available. The open- drain output makes the connectivity with any external interface for hardware monitoring easier. These features are combined with the Melexis patented no- VDD design to fit the IC in small 4-pin VK package. The device is also delivered in DC package for automatic assembly. REVISION 007 - JUNE 6, 2017 Page 1 of 14 3901090285 MLX90285 24V Low Noise Two-Coil Fan Driver Contents 1. Features and Benefits ............................................................................................................................ 1 2. Applications ........................................................................................................................................... 1 3. Ordering information ............................................................................................................................. 1 4. Functional Diagram ................................................................................................................................ 1 5. General Description ............................................................................................................................... 1 6. Glossary of Terms .................................................................................................................................. 4 7. Absolute Maximum Ratings ................................................................................................................... 4 8. Application Information ......................................................................................................................... 4 9. General Electrical Specifications ............................................................................................................ 5 10. Magnetic Specifications ....................................................................................................................... 6 11. Driver Output vs Magnetic Pole ........................................................................................................... 6 12. Detailed General Description ............................................................................................................... 6 13. Unique Features .................................................................................................................................. 7 13.1. Active Soft Switching ........................................................................................................................ 7 13.2. Best Performance to Noise compromise ........................................................................................ 8 13.3. Two-Stage Thermal protection ........................................................................................................ 8 14. Performance Graphs ............................................................................................................................ 9 14.1. R vs. T ........................................................................................................................................ 9 DSON J 14.2. R vs. V ..................................................................................................................................... 9 DD DSON 14.3. Magnetic parameters vs. T ............................................................................................................. 9 J 14.4. Magnetic parameters vs. V ......................................................................................................... 9 DD 14.5. I vs. T .......................................................................................................................................... 9 DD J 14.6. I vs. V .......................................................................................................................................... 9 DD DD 14.7. V vs T ......................................................................................................................................... 10 OL J 14.8. Power dissipation vs. T ................................................................................................................ 10 A 15. Standard information regarding manufacturability of Melexis products with different soldering processes ................................................................................................. Error Bookmark not defined. 16. ESD Precautions ...................................................................................... Error Bookmark not defined. 17. Packages Information (Outline Drawing, Hall Plate location & Pinout) ............................................... 12 17.1. VK Package (4-pin TO92)................................................................................................................ 12 17.2. DC Package (8-pin narrow SOIC) ................................................................................................... 13 18. Revision history.................................................................................................................................. 14 REVISION 007 - JUNE 6, 2017 Page 2 of 14 3901090285