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Sharp Electronic Components Datasheet

LT202A Datasheet

GaAs Hall IC for Fan Motor

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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
GaAs Hall IC for Fan Motor
s Outline Dimensions
Y
8-0.4±0.1
P 1.27TYP
85
(Unit : mm)
-X 0
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
14
5.0±0.2
0.15±0.05
Sensor - X direction : against package
positioning
center -1.4±0.2a
Y direction : against package
center 0.0±0.2a
Z direction : from package
Terminal connection
surface 0.0±0.2a
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)
Symbol
VCC
VO
IOMAX
Output current (continuous)
Coil input voltage
Alarm output sink current
Power dissipation
Oparating temperature
Storage temperature
Soldering temperature*1
IO
VIN
ISINK
PD
Topr
Tstg
Tsol
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
(Ta=25˚C)
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
s Electrical Characteristics
(Ta=25˚C)
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
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.


Sharp Electronic Components Datasheet

LT202A Datasheet

GaAs Hall IC for Fan Motor

No Preview Available !

Hall IC
s Block Diagram and Timing Chart
Phase
detection coil 1
2
+
-
+
-
+
-
Constant voltage
VCC
8
7
Motor
6
Rotation detector/
automatic restart circuit
Timing chart
Magnetic pole Coil input(1:+)
S (>10mT)
V1-V2=<0
S (>10mT)
V1-V2>15mV
3 45
N(<-10mT)
V1-V2<-15mV
N(<-10mT)
V1-V2>=0
GND Alarm output
LT202A
OUT 6
OFF
OFF
OFF
ON
OUT 7
ON
OFF
OFF
OFF
Fig. 1 Output Saturation Voltage vs.
Ambient Temperature
2.0
VCC=12V
1.8 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)
Fig. 2 Output Saturation Voltage vs.
Input Current (Continuous)
2.0
VCC=12V
1.8 Ta=25˚C
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)


Part Number LT202A
Description GaAs Hall IC for Fan Motor
Maker Sharp Electrionic Components
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LT202A Datasheet PDF






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