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| US79 Series CMOS Power Hall IC 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 Applications * * Fan sizes up to 90mm Current range up to 400mA Ordering Information Part No. US79 Temperature Suffix K (-40 to 125 C C) Package Code UA (TO-92 flat) 1. Functional Diagram 2. 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 125C. 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. 123 39010US79 Rev. 006 Page 1 of 9 DataSheet Feb/04 US79 Series CMOS Power Hall IC TABLE OF CONTENTS FEATURES AND BENEFITS ...................................................................................................................... 1 APPLICATIONS............................................................................................................................................ 1 ORDERING INFORMATION......................................................................................................................... 1 1. 2. 3. 4. 5. 6. 7. 8. 9. FUNCTIONAL DIAGRAM...................................................................................................................... 1 DESCRIPTION....................................................................................................................................... 1 GLOSSARY OF TERMS ....................................................................................................................... 3 ABSOLUTE MAXIMUM RATINGS ....................................................................................................... 3 US79 ELECTRICAL SPECIFICATIONS ............................................................................................... 3 US79 MAGNETIC SPECIFICATIONS................................................................................................... 3 UNIQUE FEATURES............................................................................................................................. 4 PERFORMANCE GRAPHS................................................................................................................... 4 APPLICATION INFORMATION ............................................................................................................ 6 10. RELIABILITY INFORMATION............................................................................................................... 7 11. ESD PRECAUTIONS............................................................................................................................. 7 12. PACKAGE INFORMATION................................................................................................................... 8 13. DISCLAIMER ......................................................................................................................................... 9 39010US79 Rev. 006 Page 2 of 9 DataSheet Feb/04 US79 Series CMOS Power Hall IC 3. 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 . 4. Absolute Maximum Ratings Supply Voltage, VDD Output Current (Fault), IOUT Operating Temperature Range, TA Storage Temperature Range, TS Maximun Junction Temp, TJ (-0.3 to 18)V 500mA -40 to 125 C -55 to 165 C 150C Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolutemaximum-rated conditions for extended periods may affect device reliability. 5. US79 Electrical Specifications DC operating parameters: TA = 25 C, VDD = 12V unless otherwise specified o Parameter Supply Voltage Supply Current Output Saturation voltage Output Saturation voltage Thermal resistance Symbol VDD IDD VDSS VDSS Rth Test Conditions Operating Operating IOUT = 150mA IOUT = 350mA Operating Min 3.5 Typ - Max 18 Units V 2.0 300 650 190 0.8 5 4 600 1100 o mA mV mV C/W S S Locked-Rotor Period Locked-Rotor period ton toff 6. US79 Magnetic Specifications DC operating parameters: TA = 25 oC, VDD = 12V unless otherwise specified. Parameter Symbol Test Conditions Min Operate Point Release Point Hysteresis BOP BRP BHYS Operating Operating Operating -6.0 2.0 Typ 2.5 -2.5 5.0 Max 6.0 Units mT mT mT 39010US79 Rev. 006 Page 3 of 9 DataSheet Feb/04 US79 Series CMOS Power Hall IC 7. 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. 8. Performance Graphs 39010US79 Rev. 006 Page 4 of 9 DataSheet Feb/04 US79 Series CMOS Power Hall IC 39010US79 Rev. 006 Page 5 of 9 DataSheet Feb/04 US79 Series CMOS Power Hall IC 9. Applications Information 39010US79 Rev. 006 Page 6 of 9 DataSheet Feb/04 US79 Series CMOS Power Hall IC 10. Reliability Information This Melexis device is classified and qualified regarding soldering technology, solderability and moisture sensitivity level, as defined in this specification, according to following test methods: * * * * * * 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) CECC00802 Standard Method For The Specification of Surface Mounting Components (SMDs) of Assessed Quality EIA/JEDEC JESD22-B106 Resistance to soldering temperature for through-hole mounted devices EN60749-15 Resistance to soldering temperature for through-hole mounted devices MIL 883 Method 2003 / EIA/JEDEC JESD22-B102 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. Based on Melexis commitment to environmental responsibility, European legislation (Directive on the Restriction of the Use of Certain Hazardous substances, RoHS) and customer requests, Melexis has installed a Roadmap to qualify their package families for lead free processes also. Various lead free generic qualifications are running, current results on request. For more information on manufacturability/solderability see quality page at our website: http://www.melexis.com/html/pdf/MLXleadfree-statement.pdf 11. ESD Precautions Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. 39010US79 Rev. 006 Page 7 of 9 DataSheet Feb/04 US79 Series CMOS Power Hall IC 12. Package Information 39010US79 Rev. 006 Page 8 of 9 DataSheet Feb/04 US79 Series CMOS Power Hall IC 13. Disclaimer Devices sold by Melexis are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. Melexis makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. Melexis reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with Melexis for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by Melexis for each application. The information furnished by Melexis is believed to be correct and accurate. However, Melexis shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interrupt of business or indirect, special incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of Melexis' rendering of technical or other services. (c) 2002 Melexis NV. All rights reserved. For the latest version of this document, go to our website at: www.melexis.com Or for additional information contact Melexis Direct: Europe and Japan: Phone: +32 13 67 04 95 E-mail: sales_europe@melexis.com All other locations: Phone: +1 603 223 2362 E-mail: sales_usa@melexis.com ISO/TS 16949 and ISO14001 Certified 39010US79 Rev. 006 Page 9 of 9 DataSheet Feb/04 |
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