WSH41F
Hall Effect Sensor IC with Complementary Output
Drivers
Features:
Operate from 2.8V to 18V supply voltage.
On-chip Hall sensor.
Internal bandgap regulator allows temperature compensated operations and a
wide operating voltage range.
High output sinking capability up to 400mA for driving large load.
Lower current change rate reduces the peak output voltages during switching.
Available in rugged low profile SOT-25 , SIP-4L packages.
Built-in
FG
output.
Built-in protection diode for reverse power supply fault.
General Description:
WSH41F is designed to integrate Hall sensor with complementary output drivers
and frequency generator together on the same chip, it is suitable for speed
measurement, revolution counting, positioning. It includes a temperature compensated
voltage regulator, a differential amplifier, a Hysteresis controller, two open-collector
output drivers capable of sinking 400mA current load and an open-collector frequency
generator capable of sinking 10mA current load. An on-chip protection diode is
implemented to prevent reverse power fault.
The temperature-dependent bias increases the supply voltage of the hall plates
and adjusts the switching points to the decreasing induction of magnets at higher
temperatures. Subsequently, the open collector output switches to the appropriate state.
WSH41F are rated for operation over temperature range from 20 C to 125C and
voltage ranges from 2.8V to 18V.
In
SOT-25
package, the built-in FG function can save fan system a lot of cost. It is a
very economical solution when fan system need FG signal.
Winson reserves the right to make changes to improve reliability or manufacturability.
Winson Semiconductor Corp.2003/11/20 1
WSH41F
Pin Descriptions: SOT-25
Name
P/I/O
Pin#
Description
OUT1 O 1
Output Pin 1
Vss P
2
Ground
OUT2 O 3
Output Pin 2
FG O
4
Frequency Generator
VDD P 5
Positive Power Supply
Pin Descriptions: SIP-4L
Name
P/I/O
Pin#
Description
Vcc P
1
Positive Power Supply
OUT1 O 2
Output Pin #1
OUT2 O 3
Output Pin #2
Vss P
4
Ground
Absolute Maximum Rating (at Ta=25 C)
Supply
Voltage Vcc
--------------------------
18V
Output / FG breakdown Voltage
Vout/Vfg --------------------- 26V
Magnetic flux density
B
--------------------------
Unlimited
Reverse Protection Voltage
Vr -------------------------- 20V
Output Current continuous Ic -------------------------- 300mA
Hold current Ih ------------------------ 400mA
Peak current Ip ------------------------- 800mA
FG ON Current (continuous) If -------------------------- 20mA
Operating Temperature Range
Ta -------------------------- (-20C to +125C)
Storage Temperature Range
Ts -------------------------- (-65C to +150C)
Package Power Dissipation Pd
--------------------------
350mw for SOT-25
500mw for SIP-4L
Winson reserves the right to make changes to improve reliability or manufacturability.
Winson Semiconductor Corp.2003/11/20 2
WSH41F
Electrical Characteristics: (T=+25C, Vcc=2.8V to 18V)
Characteristic
Symbol Test Conditions
Min
Typ Max Units
Supply Voltage
Vcc
2.8
18
V
Output Saturation
Voltage
Vout(sat) Vcc=18V, Ic=200mA
B > Bop
0.2
0.4
V
FG Saturation
Voltage
Vfg(sat) Vcc=18V, If=10mA
B > Bop
0.15
0.4
V
Output Leakage
Current
Ileakage Vcc=18V, B < Brp
<0.1
10
uA
Supply Current
Isupply Vcc=18V, Output &
FG Open
13
25
mA
Output / FG Rising
Time
Tr
Vcc=12V, RL=820
CL=20Pf
3.0
10
us
Output / FG Falling
Time
Tf
Vcc=12V, RL=820
CL=20Pf
0.3
1.5
us
Output / FG Time
Differential
t Vcc=12V, RL=820
CL=20Pf
0.3
3
us
Function Block:
Winson reserves the right to make changes to improve reliability or manufacturability.
Winson Semiconductor Corp.2003/11/20 3
WSH41F
Magnetic Characteristics:
Characteristics Symbol
Quantity
Ta= -20C to +90C
Min Typ. Max
Unit
Operate Point
Bop
None latch
150 Gauss
Release Point
Brp
None latch
10
Gauss
Ordering Information:
SIP- 4L: WSH41F-XPA5 Elec. Grade
SOT-25: WSH41F-XPB5 None latch : 150 Gauss
Winson reserves the right to make changes to improve reliability or manufacturability.
Winson Semiconductor Corp.2003/11/20 4
WSH41F
Test Circuit:
SIP-4L
SOT-25
Winson reserves the right to make changes to improve reliability or manufacturability.
Winson Semiconductor Corp.2003/11/20 5
WSH41F
Package Information:
SOT-25
Winson reserves the right to make changes to improve reliability or manufacturability.
Winson Semiconductor Corp.2003/11/20 6
WSH41F
SIP-4L
Winson reserves the right to make changes to improve reliability or manufacturability.
Winson Semiconductor Corp.2003/11/20 7
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