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| EUM6179/6179A Single-Phase Full-Wave Motor Driver for Fan Motor DESCRIPTION EUM6179 is designed specifically for electronic commutation of single coil brushless DC motor applications. It is intended to be used as an interface between a HALL IC and a single coil motor. The functions built in EUM6179 are soft switched drive mode, fan tachometer, lock detection, automatic restart, thermal shut-down and Hall Bias. Soft switched drive mode makes the output signal gentle when the amplitude of HALL signal is small. Oppositely, it makes the output signal steep when the amplitude of HALL signal is big. If the motor is stalled by external force or obstacles, overdrive current may incur coil overheat/burning. To prevent this, lock detection circuit can shut down the driver for 5 seconds after motor lockup. Then automatic restart circuit will try to power up the driver for 500ms every 5 seconds. For different application, fan tachometer circuit has FG output for EUM6179 and FG/2 output for EUM6179A. FEATURES Low Voltage 2.2V~6V Single-Phase Full-Wave driver System Soft switched drive Lock detection, Automatic restart Tachometer Output FG output for EUM6179, FG/2 output for EUM6179A Hall Bias Thermal Shutdown Protection FG Output RoHS Compliant and 100% Lead (Pb)-Free APPLICATIONS NB FAN Motor Application Circuit and Block Diagram Figure 1. DS6179 Ver1.0 Feb. 2007 1 EUM6179/6179A Pin Configurations Package Type Pin Configurations MSOP-8 Pin Description PIN OUT2 H+ HB HPin 1 2 3 4 Motor output terminal Hall input terminal Hall bias terminal Hall input terminal Output pin of fan tachometer ( open-collector ) FG : EUM6179 ( The frequency is the same as Hall input frequency ) FG/2 : EUM6179A ( The frequency is the half of Hall input frequency ) Power supply terminal Motor output terminal GROUND terminal DESCRIPTION FG 5 VCC OUT1 GND 6 7 8 Power Dissipation Figure 2. To use at temperature above Ta=25J reduce 4.68mW/J DS6179 Ver1.0 Feb. 2007 2 EUM6179/6179A Ordering Information Order Number EUM6179MIR1 EUM6179AMIR1 Package Type MSOP-8 MSOP-8 Marking Operating Temperature range -40 C to 105C -40 C to 105C xxxx 6179 xxxx 6179A EUM6179/A 1/4 1/4 1/4 1/4 Lead Free Code 1: Lead Free 0: Lead Packing R: Tape & Reel Operating temperature range I: Industry Standard Package Type M: MSOP-8 DS6179 Ver1.0 Feb. 2007 3 EUM6179/6179A Absolute Maximum Ratings VCC --------------------------------------------------------------------------------Iomax -------------------------------------------------------------------------------IFG ----------------------------------------------------------------------------------VFG----------------------------------------------------------------------------------Power Dissipation-------------------------------------------------------------------Junction Temperature -------------------------------------------------------------Storage Temperature Range -----------------------------------------------------Lead Temperature (Soldering, 10sec.) ------------------------------------------ESD Ratings Human Body Mode ---------------------------------------------------------------Machine Mode --------------------------------------------------------------------7V 1000mA 5mA 7V 585mW 150C -55C to 150C 260C 1kV 300V Recommended Operating Conditions Supply Voltage, VCC --------------------------------------------------------------- 2.2V to 6V Hall input voltage range---------------------------------------------------------- 0.4 to Vcc-1.1V Operating Temperature Rang ---------------------------------------------------- -40C to 105C Electrical Characteristics (Unless otherwise specified TA =25C, VCC = 5V) Parameter ICC Hall input VHOFS Output VO Input offset voltage Output voltage Supply Voltage Conditions Min --- Limit Typ 3.3 -0.30 48 -10 0.50 5.0 1.30 Max. 6 3 0.45 50 0.3 15 0.65 6.5 1.45 Unit mA mV V dB V mV sec sec V Io=250mA Upper and Lower total -45 Gio Input-output Gain FG signal output VFGL FG low voltage IFG=3mA VHYS Input hysteresis voltage Lock protection TON TOFF Hall bias VHB Hall bias voltage IHB=5mA Lock detection ON time Lock detection OFF time -6 0.35 3.5 1.15 * This product is not designed for protection against radioactive rays. DS6179 Ver1.0 Feb. 2007 4 EUM6179/6179A Input Output Circuit DS6179 Ver1.0 Feb. 2007 5 EUM6179/6179A Supply Current VH+=0.75V VH-=0.55V Input Offset Voltage VH+=2.2V VH-=2.2V VHOFS=(VOUT1-VOUT2)/GIO Output Voltage VH+=0.75V VH-=0.55V IO=250mA VO =Voh+Vo1 Output Voltage VH+=0.55V VH-=0.75V IO=250mA VO =Voh+Vo1 DS6179 Ver1.0 Feb. 2007 6 EUM6179/6179A Input-Output Gain STEP 1 VH+= VH-=2.2 V Measure V1 STEP 2 VH+=2.2 V+(2.2V-V1)/300+0.001 VH-=2.2 V Measure V2 STEP 3 VH+=2.2 V+(2.2V-V1)/300+0.001 VH-=2.2 V Measure V3 GIO=20log[(V2-V3)/0.002] FG Low Voltage VH+=0.75 V VH-=0.55 V IFG=3mA DS6179 Ver1.0 Feb. 2007 7 EUM6179/6179A Input Hysteresis Voltage Upper VH-= 2.2 V VH+= 2.1 V VFG= H Sweep up VH+ when VFG:H/ L Measure VH+ VHYS=VH+-2.2V Lower VH-= 2.2 V VH+= 2.3 V VFG= H Sweep up VH+ when VFG:L/ H Measure VH+ VHYS=VH+-2.2V Lock Detection ON/OFF Time VH+=0.75 V VH-=0.55 V Ton: the time OUT1=H Toff: the time OUT1=L (L<0.1VB 4.95V VH+=0.55 V VH-=0.75 V IHB=5mA DS6179 Ver1.0 Feb. 2007 8 EUM6179/6179A Notes Absolute maximum ratings This product is produced with strict quality control, but destroyed in using exceed the absolute maximum ratings. Once IC destroyed, failure mode cannot be defined ( like short-mode or open-mode). Therefore, physical security countermeasure, like fuse, is to be given when a specific mode to exceed the absolute maximum ratings is considered. GND potential The GND terminal should be the location of the lowest voltage on the chip. Figure 4. Thermal design The thermal design should allow enough margin for actual power dissipation. Mounting failures Mounting failures, such as misdirection or mismount, may destroy the device. The electrical short caused by falling particle, between outputs; power supply and output; or output and ground, may damage the device. Electromagnetic field A strong electromagnetic field may cause malfunction. ASO Please consider output transistors not to exceed absolute maximum ratings and ASO. Hall signal input terminals (H+BH-) Please adjust Hall input voltage by value of R1 so that hall signal contains amplitude input within range 0.4V~Vcc-1.1V. In case Vcc noise influence the hall signal by board wiring pattern, please connect capacitor C1 like Fig 4. In the case of long board wiring pattern from hall element to hall signal input terminal, please connect capacitor C2 like Fig 4. Figure 5. Difference of output signal depending on hall input signal The output signal of this IC is the amplified hall input signal, therefore, the output signal depends on hall input signal. When the amplitude of hall signal is small, the output signal becomes gentle. Oppositely, the amplitude is big, the output signal becomes steep. The hall-input/output gain is about 300 times (TYP). So, please input the suitable signal to make an adequate amplitude of the output signal. Figure 3. Hall input voltage range DS6179 Ver1.0 Feb. 2007 9 EUM6179/6179A Thermal shut down (TSD) This IC is built-in TSD. TSD has the temperature hysteresis. Lock detection , automatic restart circuit This IC detect the rotation of the motor by hall signal, and adjust lock detection ON time (Ton) and lock detection OFF time (Toff) by the internal counter. These time (Ton, Toff) are showed below. Figure 6. TSD TSD ON (TYP. :175J ) All output transistor OFF. TSD OFF (TYP. :150J ) Reset ordinary motion. (It has the temperature hysteresis of 25J Figure 7. Lock detect and auto restart motion *Motor does not restart while lock detection off time. Output current Less than 4.0V, lomax is decreased as shown if Fig 8. Please use it not to be over Pd. Figure 8. Iomax DS6179 Ver1.0 Feb. 2007 10 EUM6179/6179A Packaging Information MSOP-8 SYMBOLS A A1 D E1 E L b e MILLIMETERS MIN. MAX. 1.10 0.00 0.15 3.00 3.00 4.70 5.10 0.40 0.80 0.22 0.38 0.65 INCHES MIN. 0.000 0.118 0.118 0.185 0.016 0.008 0.026 0.201 0.031 0.015 MAX. 0.043 0.006 DS6179 Ver1.0 Feb. 2007 11 |
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