LT202

LT202A SHARP | Alldatasheet

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In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP devices shown in catalogs, data books, etc. Contact SHARP in order to obtain the latest device spcification sheets before using any SHARP device. Hall IC n Outline Dimensions (Unit : mm) LT202A GaAs Hall IC for Fan Motor n Features \ Increasing the efficiency of motor rotation due to cutting the electric current which doesn't contributing to rotation \ Combining a GaAs Hall device and a driver IC in a compact 8-pin SOP package \ Operation in low magnetic flux density (10mT) due to applied high sensitive Hall device \ Built-in protection circuit, alarm output and automatic restart circuit n Applications \` Brushless fan motors 1. Cooling fan motors for personal computers, word processors, etc. 2. Directly cooling fan motors for cooling fin, PCB, etc. 3. Fan motors for air circulation of temperature sensor in air conditioner LT202A As for dimensions of tape-packaged products, refer to page 44 . n Absolute Maximum Ratings (Ta=25˚C) Supply voltage Output voltage Output current (peak) Output current (continuous) Coil input voltage Alarm output sink current Power dissipation Oparating temperature Storage temperature Symbol V CC V O IOMAX IO V IN ISINK PD T opr T stg Conditions V CC =12V V CC =24V V CC =12V V CC =24V Rating 750 450 250 150 -0.2 to 0.2 400 -20 to +80 -55 to +150 Unit V V mA mA mA mA V mA mW Parameter Soldering temperature*1 T sol 260 ˚C *1 Soldering time : within 10 seconds (Note) Unspecified condition is Vcc=24V. * In case of oscillating from power supply due to wiring, connect a condenser between 8-pin (Vcc) and 4-pin (GND). n Electrical Characteristics (Ta=25˚C) Output saturation voltage Output cut-off current Operating supply voltage Supply current Operating magnetic flux density Coil input sensitivity Alarm output saturation voltage Alarm output leakage current Symbol V OUT IOC V CC ICC B 1 B 2 V IN V SAT ILEAK Conditions IO =250mA, V CC =12V V O =55V At no-load I SINK =4mA V=28V MIN. -10 TYP. MAX. 1.5 0.5 Unit V µA V mA mT mT mV V µA Parameter 0.1±0.1 0.650.60 1.25±0.2 X direction : against package center -1.4±0.2a Y direction : against package center 0.0±0.2a Z direction : from package surface 0.0±0.2a The section of leads (both sides of package in X-direction) is connected with the terminal of internal IC. Be careful in connecting other circuits. Terminal connection 1:Input terminal for phase detection 2:Input terminal for phase detection 3:Condenser terminal for rotation detection 4:GND 5:Alarm output 6:Vout 7:Vout 8:Vcc -Sensor positioning Y X 0 8-0.4±0.1 5.0±0.2 0.15±0.05 4.4±0.2 6.5±0.4 (5.05) P 1.27TYP

n Block Diagram and Timing Chart Fig. 1 Output Saturation Voltage vs. Ambient Temperature Fig. 2 Output Saturation Voltage vs. Input Current (Continuous) Hall IC LT202A V CC Motor Constant voltage 543 GND Alarm output Phase detection coil1 Magnetic pole S (>10mT) S (>10mT) N (<-10mT) N(<-10mT) Coil input(1:+) V 1-V2=<0 V 1-V2>15mV V 1-V2<-15mV V 1-V2>=0 OUT 6 OFF OFF OFF ON OUT 7 ON OFF OFF OFF Timing chart Rotation detector/ automatic restart circuit V CC =12V IO =250mA 0-40 80 60200-20 40 100 2.0 1.6 1.2 0.8 0.4 1.8 1.4 1.0 0.6 0.2 Output saturation voltage VOUT (V) Ambient temperature Ta (˚C) V CC =12V T a=25˚C 00 200 100 300 2.0 1.6 1.2 0.8 0.4 1.8 1.4 1.0 0.6 0.2 Output saturation voltage VOUT (V) Input current(Continuous) IO (mA)

Fig. 3 Supply Current vs. Ambient Temperature Fig. 4 Supply Current vs. Supply Voltage Fig. 8 Alarm Output Saturation Voltage vs. Alarm Output Sink Current Fig. 7 Alarm Output Saturation Voltage vs. Ambient Temperature Fig. 5 Coil Input Sensitivity vs. Ambient Temperature Fig. 6 Operating Magnetic Flux Density vs. Ambient Temperature Hall IC LT202A V CC =24V ISINK =4mA 0-40 80 60200-20 40 100 0.20 0.16 0.12 0.08 0.04 0.18 0.14 0.10 0.06 0.02 Alarm output saturation voltage VSAT (V) Ambient temperature Ta (˚C) V CC =12V T a=25˚C 004 216 35 0.10 0.08 0.06 0.04 0.02 Alarm output saturation voltage VSAT (V) Alarm output sink current ISINK (mA) V CC =24V -12 -40 80 60200-20 40 100 -10 Operating magnetic flux density B2 (mT) Ambient temperature Ta (˚C) V CC =24V 0-40 80 60200-20 40 100 Coil input sensitivity VIN (mV) Ambient temperature Ta (˚C) V CC =12V At no-load 0-40 80 60200-20 40 100 Supply current ICC (mA) Ambient temperature Ta (˚C) T a=25˚C At no-load 002 5 3 05 1 01 52 0 3 5 Supply current ICC (mA) Supply voltage VCC (V)