US79KUA-AAA-001-BU

US79 Series CMOS Power Hall IC 2. Applications 1. Features and Benefits  Built-in Reverse Voltage Protection  Built-in RFI Filter  Power Efficient CMOS and Power MOSFET Drivers allow 400mA without overheating  Built-in Zener Diodes Protect Outputs  Eliminate all Fan Components  Eliminate PC Board  5V and 12V Operation  High Sensitivity for switching symmetry  Locked Rotor Shutdown   Fan sizes up to 90mm Current range up to 400mA 3. Ordering information Product Code US79 Temperature Code K (-40°C to 125°C) Package Code UA (TO-92 flat) Option Code AAA-000 Packing Form Code BU 4. Functional Diagram 5. Description The US79KUA is the most advanced Smart Fan Control Hall IC. It is designed for 5V and 12V cooling commutation. The chip contains many features to allow survival in a harsh environment. The IC was designed to eliminate all discrete components such as capacitors, resistors, transistors, diodes, PC board and associated labor, replacing US$0.25 to US$0.35 in direct cost. The K rating guarantees proper operation up to an ambient temperature of 125°C. Hall IC circuitry and power FET output provide a low power dissipation cool chip. Locked Rotor conditions are detected by the IC when there is no motion for one second and will shut off the motor drive for five seconds. Then, the IC will turn on the drive current for one second. This sequence continues indefinitely until the locked rotor condition is fixed. This feature prevents overheating. REVISION 010 - SEP 15, 2021 39010US79 Page 1 of 10 US79 Series CMOS Power Hall IC Contents 1. Features and Benefits ........................................................................................................................................ 1 2. Applications ................................................................................................................................................................1 3. Ordering information......................................................................................................................................... 1 4. Functional Diagram............................................................................................................................................ 1 5. Description..................................................................................................................................................................1 6. Glossary of Terms .............................................................................................................................................. 3 7. Absolute Maximum Ratings............................................................................................................................... 3 8. US79 Electrical Specifications ........................................................................................................................... 3 9. US79 Magnetic Specifications ........................................................................................................................... 4 10. Unique Features............................................................................................................................................... 4 11. Performance Graphs ....................................................................................................................................... 5 12. Applications Information................................................................................................................................. 6 13. Standard information regarding manufacturability of Melexis products with different soldering processes ...................................................................................................................................................................7 14. ESD Precautions ............................................................................................................................................... 7 15. UA Package Information.................................................................................................................................. 8 15.1. Hall plate location ............................................................................................................................. 8 15.2. AAA000 Package variant .................................................................................................................. 8 16. Revision history ..............................................................................................................................................10 17. Contact................................................................................................................................................................... 10 18. Disclaimer .............................................................................................................................................................. 10 REVISION 010 - SEP 15, 2021 39010US79 Page 2 of 10 US79 Series CMOS Power Hall IC 6. Glossary of Terms MilliTesla (mT), Gauss: Units of magnetic flux density; 1 milliTesla = 10 Gauss. Two-Coil Fan: a fan with two coil windings, current alternates from 1 coil to the other depending on the polarity of the magnetic field. Two-wire Fan: A fan that has only two connections for the power supply plus and minus. Locked rotor: The condition of a fan that has stopped spinning due to mechanical blockage . 7. Absolute Maximum Ratings Supply Voltage, VDD (-0.3 to 18)V Output Current (Fault), IOUT 500mA Operating Temperature Range, TA -40 to 125°C Storage Temperature Range, TS -55 to 165°C Maximun Junction Temp, TJ 150°C Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 8. US79 Electrical Specifications o DC operating parameters: TA = 25 C, VDD = 12V unless otherwise specified Parameter Symbol Test Conditions Min Typ Max Units Supply Voltage VDD Operating 3.5 - 18 V Supply Current IDD Operating 1.4 2.0 mA Output Saturation voltage VDSS IOUT = 150mA 300 600 mV Output Saturation voltage VDSS IOUT = 350mA 650 1100 mV Thermal resistance Rth Operating 190 Locked-Rotor Period ton 0.8 S Locked-Rotor period t off 5 S REVISION 010 - SEP 15, 2021 39010US79 o C/W Page 3 of 10 US79 Series CMOS Power Hall IC 9. US79 Magnetic Specifications DC operating parameters: TA = 25 oC, VDD = 12V unless otherwise specified. Parameter Symbol Test Conditions Min Typ Max Units 2.5 6.0 mT Operate Point BOP Operating Release Point BRP Operating -6.0 -2.5 Hysteresis BHYS Operating 2.0 5.0 mT - mT 10. Unique Features Reverse voltage protection eliminates the need for a diode. Reverse current flows through the coils and the chip. Power dissipation is (2 * Istall/Istart * 0.7V). Table 1 presents max temperature for each current. Reverse Voltage protection is provided by the motor windings. The 35V Zener diodes clamp the output drivers for overstress protection. REVISION 010 - SEP 15, 2021 39010US79 Page 4 of 10 US79 Series CMOS Power Hall IC 11. Performance Graphs REVISION 010 - SEP 15, 2021 39010US79 Page 5 of 10 US79 Series CMOS Power Hall IC 12. Applications Information REVISION 010 - SEP 15, 2021 39010US79 Page 6 of 10 US79 Series CMOS Power Hall IC 13. Standard information regarding manufacturability of Melexis products with different soldering processes Our products are classified and qualified regarding soldering technology, solderability and moisture sensitivity level according to following test methods: Reflow Soldering SMD’s (Surface Mount Devices) • • IPC/JEDEC J-STD-020 Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices (classification reflow profiles according to table 5-2) EIA/JEDEC JESD22-A113 Preconditioning of Nonhermetic Surface Mount Devices Prior to Reliability Testing (reflow profiles according to table 2) Wave Soldering SMD’s (Surface Mount Devices) and THD’s (Through Hole Devices) • • EN60749-20 Resistance of plastic- encapsulated SMD’s to combined effect of moisture and soldering heat EIA/JEDEC JESD22-B106 and EN60749-15 Resistance to soldering temperature for through-hole mounted devices Iron Soldering THD’s (Through Hole Devices) • EN60749-15 Resistance to soldering temperature for through-hole mounted devices Solderability SMD’s (Surface Mount Devices) and THD’s (Through Hole Devices) • EIA/JEDEC JESD22-B102 and EN60749-21 Solderability For all soldering technologies deviating from above mentioned standard conditions (regarding peak temperature, temperature gradient, temperature profile etc) additional classification and qualification tests have to be agreed upon with Melexis. The application of Wave Soldering for SMD’s is allowed only after consulting Melexis regarding assurance of adhesive strength between device and board. Melexis recommends reviewing on our web site the General Guidelines soldering recommendation (www.melexis.com/soldering-and-welding) as well as trim&form recommendations (www.melexis.com/lead-forming) Melexis is contributing to global environmental conservation by promoting lead free solutions. For more information on qualifications of RoHS compliant products (RoHS = European directive on the Restriction Of the use of certain Hazardous Substances) please visit the quality page on our website: https://www.melexis.com/environmental-forms-anddeclarations 14. ESD Precautions Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. REVISION 010 - SEP 15, 2021 39010US79 Page 7 of 10 US79 Series CMOS Power Hall IC 15. UA Package Information 15.1. Hall plate location 15.2. AAA000 Package variant REVISION 009 - JUNE 6, 2017 age 8 of 10 REVISION 010 - SEP 15, 2021 Page 8 of 10 39010US79 US79 Series CMOS Power Hall IC 16. Revision history Rev 009 Date 6-Jun-17 Author DLM 010 15-Sep-21 CEL Comment • New template • Reduced IDD MAX specification to 2.0mA • Updated solderability guidelines • Removed the variant US79KUA-AAA-001-BU • Chapter 13: links updated • Contact section updated • Disclaimer updated 17. Contact For the latest version of this document, go to our website at www.melexis.com. For additional information, please contact our Direct Sales team and get help for your specific needs: Europe, Africa Email : sales_europe@melexis.com Americas Email : sales_usa@melexis.com Asia Email : sales_asia@melexis.com REVISION 010 - SEP 15, 2021 39010US79 Page 9 of 10 US79 Series CMOS Power Hall IC 18. 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This disclaimer will be governed by and construed in accordance with Belgian law and any disputes relating to this disclaimer will be subject to the exclusive jurisdiction of the courts of Brussels, Belgium. The invalidity or ineffectiveness of any of the provisions of this disclaimer does not affect the validity or effectiveness of the other provisions. The previous versions of this document are repealed. Melexis © - No part of this document may be reproduced without the prior written consent of Melexis. (2021) IATF 16949 and ISO 14001 Certified REVISION 010 - SEP 15, 2021 39010US79 Page 10 of 10