Hall IC LT202A GaAs Hall IC for Fan Motor LT202A ■ Outline Dimensions P 1.27TYP 8-0.4±0.1 -X 5 0 (5.05) 8 1 ■ Applications (Unit : mm) Y 4.4±0.2 6.5±0.4 ■ 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 4 0.15±0.05 0.65 1.25±0.2 5.0±0.2 0.1±0.1 0.60 ¡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 - X direction : against package Sensor positioning center -1.4±0.2a Y direction : against package center 0.0±0.2a Z direction : from package surface 0.0±0.2a 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. ■ Absolute Maximum Ratings Parameter Supply voltage Output voltage Symbol VCC VO Output current (peak) IOMAX Output current (continuous) IO Coil input voltage Alarm output sink current Power dissipation Oparating temperature Storage temperature Soldering temperature*1 VIN ISINK PD Topr Tstg Tsol (Ta=25˚C) Conditions VCC=12V VCC=24V VCC=12V VCC=24V Rating 30 55 750 450 250 150 -0.2 to 0.2 5 400 -20 to +80 -55 to +150 260 Unit V V mA mA mA mA V mA mW ˚C ˚C ˚C As for dimensions of tape-packaged products, refer to page 44 . *1 Soldering time : within 10 seconds ■ 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 (Ta=25˚C) Symbol VOUT IOC VCC ICC B1 B2 VIN VSAT ILEAK Conditions IO=250mA, VCC=12V VO=55V * At no-load ISINK=4mA V=28V MIN. 8 -10 15 - TYP. - MAX. 1.5 30 28 13 10 0.5 15 Unit V µA V mA mT mT mV V µA (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. LT202A Hall IC ■ Block Diagram and Timing Chart VCC 8 Constant voltage 7 + - Phase detection coil 1 Motor 6 + - 2 + - 3 4 5 GND Alarm output Fig. 1 Output saturation voltage VOUT (V) 2.0 1.8 Output Saturation Voltage vs. Ambient Temperature VCC=12V IO=250mA 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 -40 -20 0 20 40 60 80 100 Ambient temperature Ta (˚C) Timing chart Magnetic pole S (>10mT) S (>10mT) N(<-10mT) N(<-10mT) Fig. 2 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 Output Saturation Voltage vs. Input Current (Continuous) 2.0 Output saturation voltage VOUT (V) Rotation detector/ automatic restart circuit VCC=12V Ta=25˚C 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 0 100 200 300 Input current(Continuous) IO (mA) LT202A Hall IC Fig. 3 Supply Current vs. Ambient Temperature Fig. 4 14 12 10 8 6 4 14 12 10 8 6 4 2 0 -40 -20 0 20 40 60 80 100 Ambient temperature Ta (˚C) 0 VCC=24V 18 16 14 12 10 8 6 4 2 0 -40 -20 0 20 40 60 80 100 Ambient temperature Ta (˚C) Fig. 7 Alarm Output Saturation Voltage vs. Ambient Temperature 0.20 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) Fig. 6 Operating magnetic flux density B2 (mT) Coil Input Sensitivity vs. Ambient Temperature 20 Coil input sensitivity VIN (mV) Ta=25˚C 18 At no-load 16 2 Fig. 5 Alarm output saturation voltage VSAT (V) 20 Supply current ICC (mA) VCC=12V 18 At no-load 16 0 5 10 15 20 25 30 Supply voltage VCC (V) 35 Operating Magnetic Flux Density vs. Ambient Temperature 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. 8 Alarm output saturation voltage VSAT (V) Supply current ICC (mA) 20 Supply Current vs. Supply Voltage Alarm Output Saturation Voltage vs. Alarm Output Sink Current 0.10 VCC=12V Ta=25˚C 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 Alarm output sink current ISINK (mA)