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MICRO POWER, ULTRA-SENSITIVE HALL SWITCH
„ FEATURES
z Micro power design
z Operation with North or South pole(omni polar)
z 2.4V to 5.5V battery operation
z High sensitivity and high stability of the magnetic
switching points
z High resistance to mechanical stress
z Digital output signal
z Good RF noise immunity
z -40to 85operating temperature
www.DataSzheePt4rUo.gcorammming pin for switching detection of output
z Package: SOT23-6L
„ FUNCTIONAL BLOCK DIAGRAM
VDD
Awake & Sleep
Timing Logic
Hall Plane
VOUT
Chopper Hysteresis
Amplifier
Latch
PRG
GND
FSH4917
„ GENERAL DESCRIPTION
The FSH4917 is an Integrated Hall Effect Sensor
designed specifically to meet the requirements of l o w -
power devices. e.g. as an On/Off switch in Cellular
Flip-Phones, with battery operating voltages of 2.4V –
5.5V.
Precise magnetic switching points and high temperature
stability are achieved through the unique design of the
internal circuit.
An onboard clock scheme is used to reduce the average
operating current of the IC.
During the operate phase the IC compares the
actual magnetic field detected with the internally
compensated switching points. The output is switched
at the end of each operating phase.
During the Stand-by phase the output stage is latched
and the current consumption of the device reduced to
some µA.
The IC switching behavior is Omni polar, i.e. it can be
switched on with either the North or South pole of a
magnet.
The PRG pin can be connected to VDD which holds the
output VO at a High level for B=0mT; conversely the
output VO can be inverted by connecting the PRG
pin to GND, which will hold the output VO at a Low
level for B=0mT. In this later case the presence of an
adequate magnetic field will cause the output VO to
switch to a High level (i.e. off state).
„ TYPICAL APPLICATION CIRCUIT
6
PRG
5
GND
4
GND
FSH4917
Vco GND Vout
123
0.1μF
50KΩ
Output
_
2.4-5.5V
+
1/9 2006-12-22

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„ PIN CONFIGURATION
(Top View)
PRG GND GND
65 4
12
www.DataSheet4U.com
3
VDD GND OUTPUT
Pin
1
2
3
4
5
6
MICRO POWER, ULTRA-SENSITIVE HALL SWITCH
FSH4917
Symbol
VDD
GND
OUTPUT
GND
GND
PRG
Function
Supply Voltage
Ground
Signal Output (Open Drain)
Ground
Ground
Programming Input
„ ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Maximum
Unit
Supply Voltage
VDD
5.5
V
Supply Current
IDD
2.5
mA
Output Voltage
Output Current
VO
IO
5.5
1
V
mA
PRG Input voltage
VPRG
5.5
V
Operating Temperature Range
TOP
-40 to 85
Junction Temperature
TJ
-40 to 150
Storage Temperature
TSTG
-40 to 150
Magnetic Flux Density
B
unlimited
mT
Power Dissipation
PD
230
mW
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device
„ TYPICAL IR SOLDER-REFLOW PROFILE
Lead Temperature (Soldering, 10sec)┄┄┄┄┄+260
150±10
90±30sec
2~5/sec
255±5
10±1sec
2~5/sec
SECOND
Soldering Condition
2/9 2006-12-22

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MICRO POWER, ULTRA-SENSITIVE HALL SWITCH
„ RECOMMENDED OPERATING RANGE
Parameter
Symbol
Min.
Typ.
Supply Voltage1)
VDD
2.4
2.7
Output Voltage
VO
-0.3
2.7
Ambient Temperature
TA
-40
25
1). A Ceramic Bypass Capacitor of 0.1uF at VDD to GND is highly recommended.
„ ELECTRICAL CHARACTERISTICS
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Parameter
Averaged Supply Current
Supply Current
During Operating Time
Supply Current
During Standby Time
Output Saturation Voltage
Output Leakage Current
Operating Time
Standby Time
Duty Cycle
1) Operating voltage is 2.7V.
Symbol
IDD(AVG)
IDD(OP)
IDD(STB)
VO(SAT)
IO(LEAK)
TOP
TSTB
TOP / TSTB
Test Condition
IO=1mA
Min.
-
-
-
-
-
-
-
-
FSH4917
Max.
5.5
5.5
85
Unit
V
V
Typ.
31)
1.11)
2.51)
0.1
0.01
56
140
0.04
Max.
20
-
-
0.3
1
-
-
-
Unit
uA
mA
uA
V
uA
us
ms
%
„ MAGNETIC CHARACTERISTICS
PRG connected to VDD
Parameter
Operate Points
(Output ON)
Release Points
(Output OFF)
Hysteresis
Symbol
BOPS
BOPN
BRPS
BRPN
BHYS
Min.
40
-70
30
-60
5
Typ.
55
-55
45
-45
10
Max.
70
-40
60
-30
15
PRG connected to GND
Parameter
Symbol
Min.
Typ.
Operate Points
BOPS
30
45
(Output ON)
BOPN
-60
-45
Release Points
(Output OFF)
BRPS
BRPN
40
-70
55
-55
Hysteresis
BHYS
5
10
Note: If not other specified, typical characteristics apply at TA = 25 °C and VDD = 2.7 V
Max.
60
-30
70
-40
15
Unit
G
G
G
G
G
Unit
G
G
G
G
G
3/9 2006-12-22