EUM6179

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=25℃ reduce 4.68mW/℃ 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 105°C -40 °C to 105°C xxxx 6179 xxxx 6179A EUM6179/A □ □ □ □ 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 150°C -55°C to 150°C 260°C 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 ---------------------------------------------------- -40°C to 105°C Electrical Characteristics (Unless otherwise specified TA =25°C, 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