US62EVK-AAA-001-BU

US62 62 / US63 Two-c coil Fan Driver Features and Benefits Application Examplles Low cost High sensitivity Hall Sensor Locked rotor protection and auto-rrestart Power-efficient CMOS and power er MOSFETs Built-in output protection clamping ng diode Integrated tachometer (US62) or alarm a (US63) signal protected output 0 2-coil fan driver with FG/RD output ut in 4-pin VK package RoHS Compliant ant 0 5/12V fans 0 Peak current up to 700mA A 0 0 0 0 0 0 Ordering Code Product Code US63 US62 Temperature Code E E Package Code VK VK Option Code AAA-000 AAA-000 Legend: Temperature Code: Package Code: Option Code: Packing Form: E for Temperature Range -40°C to 85°C VK for Plastic Single in Line xxx-000: 000: standard Version BU for Bulk Ordering example: US63EVK US63EVK-AAA-000-BU 1 Functional Diagram Packing Form Code BU BU 2 General Descriptio ion The US62/63 is a one-chip solu ution for driving twocoil brushless DC cooling fans.. Based on the advanced Melexiis CMOS process, the IC contains a Hall-effect sen ensor, dynamic offset correction and low side o output drivers. Frequency Generator or Rotatiion Detection is available. The open-drain output utput makes easier the connectivity with any external inte nterface such as hardware monitoring or Super I/O IC. These features are combined w with the Melexis patented no-VDD design to fit th he IC in a small 4pin VK package. 3901000062 Rev 003 Page 1 of 11 Data Sheet Apr/12 US62 / US63 Two-coil Fan Driver Table of Contents 1 Functional Diagram ........................................................................................................ 1 2 General Description ........................................................................................................ 1 3 Glossary of Terms .......................................................................................................... 3 4 Absolute Maximum Ratings ........................................................................................... 3 5 Pin Definitions and Descriptions ................................................................................... 3 6 General Electrical Specifications .................................................................................. 4 7 Magnetic Characteristics ............................................................................................... 4 8 Driver Output vs Magnetic Pole ..................................................................................... 4 9 Detailed General Description ......................................................................................... 5 10 Unique Features ............................................................................................................ 5 11 Performance Graphs .................................................................................................... 6 11.1 RDSON vs TJ ............................................................................................................... 6 11.2 RDSON vs VDD ............................................................................................................. 6 11.3 Magnetic Parameters vs TJ ....................................................................................... 6 11.4 Magnetic Parameters vs VDD..................................................................................... 6 11.5 IDD vs VDD .................................................................................................................. 6 12 Test conditions ............................................................................................................. 7 12.1 VDD – operating ......................................................................................................... 7 12.2 RDSON ........................................................................................................................ 7 12.3 IDD ............................................................................................................................. 7 12.4 FG/RD Output Low Voltage ...................................................................................... 7 13 Application Information................................................................................................ 8 13.1 Typical application with pull-up resistor..................................................................... 8 13.2 Configuration for reverse voltage / ground hot-switch protection .............................. 8 14 Application Comments ................................................................................................. 8 15 Standard information regarding manufacturability of Melexis products with different soldering processes........................................................................................... 9 16 ESD Precautions ........................................................................................................... 9 17 VK Package Information (4-pin TO-92)...................................................................... 10 18 Disclaimer.................................................................................................................... 11 3901000062 Rev 003 Page 2 of 11 Data Sheet Apr/12 US62 / US63 Two-coil Fan Driver 3 Glossary of Terms Two-coil fan MilliTesla (mT), Gauss VDD IDD Peak output current Continuous output current Locked rotor FG RD LFPM A fan with two-coil windings where current alternates from 1 coil to the other depending on the direction of the magnetic field. Units of magnetic flux density : 1mT = 10 Gauss Voltage on the common point of the fan coils. Current supplying the chip which flows through the coil connected to the switched off output driver. The current flowing in the coil at start-up, only limited by the coil resistance RCOIL and the output driver resistance RDSON. The current flowing in the coil when the fan is spinning normally. The state when the fan stopped spinning due to mechanical blockage. Frequency generator or tachometer output Rotation detection or alarm output Linear Feet Per Minute – Unit of airflow velocity 4 Absolute Maximum Ratings Parameter Symbol Fan Supply Voltage VDD Peak Output Current IOUTp Continuous Output Current IOUTc Operating Temperature Range TA Junction Temperature TJ Storage Temperature Range TS Magnetic Flux Density B ESD Sensitivity (AEC Q100 002) Table 1: Absolute maximum ratings Value 18 700 250 -40 to 85 125 -55 to 150 Unlimited 2 Units V mA mA °C °C °C mT kV Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximumrated conditions for extended periods may affect device reliability. 5 Pin Definitions and Descriptions Pin Name Pin number Function FG (RD) 1 Frequency Generator (Rotation Detection) open drain output signal OUT1 2 Open Drain Coil Driver 1 OUT2 3 Open Drain Coil Driver 2 GND 4 Ground pin Table 2: Pin definitions and descriptions US62 (US63) 3901000062 Rev 003 Page 3 of 11 Data Sheet Apr/12 US62 / US63 Two-coil Fan Driver 6 General Electrical Specifications DC Operating Parameters T A = 25oC, VDD = 5V to 12V (unless otherwise specified) Parameter Fan Supply Voltage Supply Current OUT1, OUT2 ON Resistance OUT1, OUT2 ON Resistance OUT1, OUT2 Output Clamp Voltage FG / RD Output Low Voltage FG / RD Output Clamp Voltage FG / RD Output Leakage Current FG / RD Output Current Limit Package Thermal Resistance Locked Rotor Period Locked Rotor Period Output Switching Delay Table 3: Electrical specifications Symbol VDD IDD RDSON 1,2 RDSON 1,2 VOUT1,2 VOL VCLMP ILEAK IFGLIM RTH TON TOFF TDELAY Test Conditions Operating – RCOIL = 50Ω Min 3.2(1) Typ 2 3.5 2.5 VDD = 5V VDD = 12V Max 18 4 36 IOL = 10mA 250 500 18 VFG (VRD) = 18V VFG (VRD) = 12V One-sided PCB, zero LFPM 10 20 200 0.22 1.3 100 “Dead time” when both drivers are off Units V mA Ω Ω V mV V µA mA °C/Watt S S us Note 1: The minimal value of VDD should be determined using the following equation: VDD = 3V + RCOIL * IDD 7 Magnetic Characteristics o DC Operating Parameters T A = 25 C, VDD = 12V (unless otherwise specified) Parameter Symbol Test Conditions Operate point BOP Release point BRP Hysteresis BHYST Table 4: Magnetic specifications Min -6 2 Typ 3 -3 6 Max 6 Units mT mT mT 8 Driver Output vs Magnetic Pole Parameter Test Conditions North pole B < BRP South pole B > BOP Table 5: Driver output vs magnetic pole OUT1 High Low OUT2 Low High Note 1: The magnetic pole is applied facing the branded side of the package 3901000062 Rev 003 Page 4 of 11 Data Sheet Apr/12 US62 62 / US63 Two-c coil Fan Driver 9 Detailed General Descri ription The US62/63 is a one-chip solution for or driving two-coil brushless DC fans. Based on advan anced Melexis CMOS process, the IC contains a Hallll-effect sensor, dynamic offset correction and low sid de output drivers. The output drivers OUT1 and OUT2 are a fully protected against switching transients. So o there the is no need for an external zener diode to cut the high gh voltage spikes induced by the fan coils. The US62 has an open-drain integrate ed tachometer FG output that follows the Hall signal.. In the US63, the open-drain rotation detection de output RD is active low during normal spinn nning of the motor. It goes high when the flux switching frequen equency becomes too low, which means the motor is blocked. b 10 Unique Features The FG/RD output driver provides an over current protection limiting the current flowing in the FG/RD driver while switched ON. It can occur if a too small pull-up resistor is used or if this resistor is sho hort connected. This protection helps avoid EOS damage age on the FG/RD driver. The absence of a VDD pin enables the e two low side output drivers and FG/RD signal outp put to fit in a four-pin VK package. The lack of a VDD pin decreases de also the probability to damage the chip due to reverse voltage connection, using the coil resistance to t limit the reverse current. In this condition, the tota al reverse current is twice the peak current value of the fan an used. The built-in locked-rotor protection auto tomatically shuts off the coil current when the rotor iss mechanically blocked, or the rotational speed becom mes too low. The fan tries to restart every 1.3 seconds onds until the rotation of the shaft is allowed again. The On / Off cycling reduces the average current to 1/7 norm mal. It is enough to prevent overheating or damage to mo ost fans. 3901000062 Rev 003 Page 5 of 11 Data Sheet Apr/12 US62 / US63 Two-coil Fan Driver 11 Performance Graphs 11.1 RDSON vs TJ 11.2 RDSON vs VDD US62 / US63 14 12 12 10 10 VDD = 5V VDD = 12V 8 Rdson (Ohms) R d s o n (O h m s ) US62 / US63 14 6 Rdson , Tj = -40°C 8 Rdson , Tj = 25°C Rdson , Tj = 125°C 6 4 4 2 2 0 0 -40 0 40 Junction Temperature (°C) 80 0 120 5 10 15 VDD 11.3 Magnetic Parameters vs TJ 11.4 Magnetic Parameters vs VDD US62 / US63 US62 / US63 10 8 Bop, VDD = 5V Bop, VDD = 12V 8 6 Brp, VDD = 5V Brp, VDD = 12V 6 4 4 2 2 B o p , B rp (m T ) Bop, Brp (mT) 10 0 -2 0 -2 -4 -4 -6 -6 -8 Bop, Tj = 25°C Bop, Tj = 125°C Brp, Tj = 25°C Brp, Tj = 125°C -8 -10 -40 -10 0 40 Junction Temperature (° C) 80 120 0 5 10 15 VDD 11.5 IDD vs VDD 4 3.5 3 IDD (mA) 2.5 Tj = 25°C 2 1.5 1 0.5 0 0 5 10 15 VDD 3901000062 Rev 003 Page 6 of 11 Data Sheet Apr/12 US62 62 / US63 Two-c coil Fan Driver 12 Test conditions 12.1 VDD – operating 12.2 RDSON 12.3 IDD 12.4 FG/RD Output Low Vol oltage 3901000062 Rev 003 Page 7 of 11 Data Sheet Apr/12 US62 62 / US63 Two-c coil Fan Driver 13 Application Informatio on 13.1 Typical application with h pull-up pull resistor 13.2 Configuration for reve everse voltage / ground hot-switch h pro protection 14 Application Comments ts Figure 13.2 shows the application inclluding several external protections. The diode DREVPROT best protects the chip c and fan coils for reverse voltage condition. The capacitor CBYPASS is recommended ended if the supply ground may be disconnected while running even though the positive supply point is still conne ected. This capacitor provides a path to ground for the remaining energy in the coil which has to be evacuated. d. Without it, the energy can flow from OUT1/OUT2 to the FG/RD driver, without any limitation and may cause EOS E damage. Its value has to be tuned depending on o the coils characteristics. Bigger inductance requirres bigger capacitor. The optional capacitor CFILTER suppress sses wire disturbances on the FG/RD output line. 3901000062 Rev 003 Page 8 of 11 Data Sheet Apr/12 US62 / US63 Two-coil Fan Driver 15 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 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: http://www.melexis.com/quality.aspx 3901000062 Rev 003 Page 9 of 11 Data Sheet Apr/12 US62 62 / US63 Two-c coil Fan Driver 16 ESD Precautions Electronic semiconductor products are e sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharrge control procedures whenever handling semicondu onductor products. 17 VK Package Informatio on 3901000062 Rev 003 Page 10 of 11 Data Sheet Apr/12 US62 / US63 Two-coil Fan Driver 18 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 lifesupport 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. © 2012 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, Africa, Asia: Phone: +32 1367 0495 E-mail: sales_europe@melexis.com America: Phone: +1 248 306 5400 E-mail: sales_usa@melexis.com ISO/TS 16949 and ISO14001 Certified 3901000062 Rev 003 Page 11 of 11 Data Sheet Apr/12