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| Hall IC LT202A LT202A s 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 s 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 Y 8-0.40.1 8 GaAs Hall IC for Fan Motor s Outline Dimensions P 1.27TYP 5 (Unit : mm) 4.40.2 6.50.4 -X 0 1 5.00.2 4 0.150.05 - X direction : against package Sensor positioning center -1.40.2a Y direction : against package center 0.00.2a Z direction : from package surface 0.00.2a 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 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. s Absolute Maximum Ratings Parameter Supply voltage Output voltage Output current (peak) Output current (continuous) Coil input voltage Alarm output sink current Power dissipation Oparating temperature Storage temperature Soldering temperature*1 Symbol VCC VO IOMAX IO VIN ISINK PD Topr Tstg Tsol Conditions Rating 30 55 750 450 250 150 -0.2 to 0.2 5 400 -20 to +80 -55 to +150 260 (Ta=25C) Unit V V mA mA mA mA V mA mW C C C VCC=12V VCC=24V VCC=12V VCC=24V *1 Soldering time : within 10 seconds s Electrical Characteristics Parameter 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 VOUT IOC VCC ICC B1 B2 VIN VSAT ILEAK Conditions IO=250mA, VCC=12V VO=55V * At no-load MIN. 8 -10 15 TYP. MAX. 1.5 30 28 13 10 0.5 15 0.10.1 0.60 As for dimensions of tape-packaged products, refer to page 44 . 0.65 1.250.2 (5.05) (Ta=25C) Unit V A V mA mT mT mV V A ISINK=4mA V=28V (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). 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 s Block Diagram and Timing Chart VCC Constant voltage + - LT202A 8 7 Motor 6 Phase detection coil 1 2 + - + - Rotation detector/ automatic restart circuit 3 4 5 GND Alarm output Timing chart Magnetic pole S (>10mT) S (>10mT) N(<-10mT) N(<-10mT) Coil input(1:+) V1-V2=<0 V1-V2>15mV V1-V2<-15mV V1-V2>=0 OUT 6 OFF OFF OFF ON OUT 7 ON OFF OFF OFF Fig. 1 2.0 Output Saturation Voltage vs. Ambient Temperature VCC=12V IO=250mA Fig. 2 2.0 Output Saturation Voltage vs. Input Current (Continuous) VCC=12V Ta=25C Output saturation voltage VOUT (V) 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 Output saturation voltage VOUT (V) 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 0 0 -40 -20 0 20 40 60 80 100 Ambient temperature Ta (C) 100 200 300 Input current(Continuous) IO (mA) Hall IC Fig. 3 20 LT202A Supply Current vs. Ambient Temperature Fig. 4 20 Supply Current vs. Supply Voltage Supply current ICC (mA) 14 12 10 8 6 4 2 0 -40 -20 0 20 40 60 80 100 Ambient temperature Ta (C) Supply current ICC (mA) VCC=12V 18 At no-load 16 Ta=25C 18 At no-load 16 14 12 10 8 6 4 2 0 0 5 10 15 20 25 30 Supply voltage VCC (V) 35 Fig. 5 20 Coil Input Sensitivity vs. Ambient Temperature VCC=24V Fig. 6 Operating magnetic flux density B2 (mT) Operating Magnetic Flux Density vs. Ambient Temperature Coil input sensitivity VIN (mV) 18 16 14 12 10 8 6 4 2 0 -40 -20 0 20 40 60 80 100 Ambient temperature Ta (C) 12 VCC=24V 10 8 6 4 2 0 -2 -4 -6 -8 -10 -12 -40 -20 0 20 40 60 80 100 Ambient temperature Ta (C) Fig. 7 Alarm output saturation voltage VSAT (V) 0.20 Alarm Output Saturation Voltage vs. Ambient Temperature Fig. 8 Alarm output saturation voltage VSAT (V) 0.10 0.08 0.06 0.04 0.02 Alarm Output Saturation Voltage vs. Alarm Output Sink Current VCC=12V Ta=25C VCC=24V 0.18 ISINK=4mA 0.16 0.14 0.12 0.10 0.08 0.06 0.04 0.02 0 -40 -20 0 20 40 60 80 100 Ambient temperature Ta (C) 0 0 1 2 3 4 5 6 Alarm output sink current ISINK (mA) |
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