WSH41FC

WSH41FC
Hall Effect Sensor IC with Complementary Output
Drivers and Frequency Generator
Features:
 Operate from 2.8V to 20V 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:
WSH41FC 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, and DC brushless motors. 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.
WSH41FC are rated for operation over temperature range from –20˚ C to125˚C and
voltage ranges from 2.8V to 20V.
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, 2003 Jan
WSH41FC
Pin Descriptions: SOT-25
Name
P/I/O
Pin#
VDD
P
1
Vss
P
2
FG
O
3
OUT2
O
4
OUT1
O
5
Description
Positive Power Supply
Ground
Frequency Generator
Output Pin 2
Output Pin 1
Pin Descriptions: SIP-4L
Name
P/I/O
Pin#
Vcc
P
1
OUT1
O
2
OUT2
O
3
Vss
P
4
Description
Positive Power Supply
Output Pin #1
Output Pin #2
Ground
Absolute Maximum Rating (at Ta=25˚ C)
Supply Voltage
Vcc -------------------------- 20V
Output / FG breakdown Voltage Vout/Vfg --------------------- 25V
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
Storage Temperature Range
Package Power Dissipation
Ta -------------------------Ts -------------------------Pd --------------------------
(-20˚C to +125˚C)
(-65˚C to +150˚C)
350mw for SOT-25
500mw for SIP-4L
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2003 Jan
WSH41FC
SIP-5L
Electrical Characteristics:
(T=+25˚C, Vcc=2.8V to 20V)
Characteristic
Symbol Test Conditions
Min
Typ Max Units
Supply Voltage
Vcc
V
─
2.8
─
20
Output Saturation Vout(sat) Vcc=20V, Ic=200mA ─
V
0.2
0.4
Voltage
B > Bop
FG Saturation
Vfg(sat) Vcc=20V, If=10mA
V
─
0.15
0.4
Voltage
B > Bop
Output Leakage
Ileakage Vcc=20V, B < Brp
UA
─
<0.1
10
Current
Supply Current
Isupply Vcc=20V, Output &
MA
─
14
25
FG Open
Output / FG Rising
Tr
3.0
Us
Vcc=12V, RL=820Ω ─
10
Time
CL=20Pf
Output / FG Falling
Tf
Us
Vcc=12V, RL=820Ω ─
0.3
1.5
Time
CL=20Pf
Output / FG Time
Us
△t
Vcc=12V, RL=820Ω ─
0.3
3
Differential
CL=20Pf
Function Block:
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2003 Jan
WSH41FC
Magnetic Characteristics:
Characteristics
Symbol
Operate Point
Bop
Release Point
Brp
Hysteresis Window
Quantity
Grade A
Grade B
Grade C
Grade A
Grade B
Grade C
Ta= -20˚C to +90˚C
Typ.
30
40
70
-50
-30
-70
-40
-120
-70
Min
Bop-Brp
40
Ordering Information:
SIP- 4L: WSH41FC-XPAN□
Elec. Grade
SOT-25: WSH41FC-XPDN□
SIP-4L :
1: A Grade (50 Gauss)
Elec. Grade
N: No-Lead process
2: B Grade (70 Gauss)
3: C Grade (120 Gauss)
SOT-25:
1: A Grade (50 Gauss)
2: B Grade (70 Gauss)
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2003 Jan
Unit
Max
50
70
120
Gauss
Gauss
150 Gauss
WSH41FC
Test Circuit:
SIP-4L
SOT-25
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2003 Jan
WSH41FC
Package Information:
SOT-25
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2003 Jan
WSH41FC
SIP-4L
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2003 Jan
WSH41FC
Application Circuit:
SOT-25
Figure 1.
SIP-4L
Figure 2.
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2003 Jan