WSH411
Winson reserves the right to make changes to improve reliability or manufacturability.
Hall Effect Sensor IC with Thermal Lock Protection
and Auto Restart Function
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
500mA
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.
Built-in
thermal lock protection
and
auto-restart
function.
General Description:
WSH411 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 1A 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. And built-in
thermal lock
protection
and
auto-restart
function is suitable for super high speed fan. It can replace
the function of lock protection and auto restart function. The power will be shutdown
automatically at 135C to prevent the coils be damaged and atuo-restart after cooling
down.
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.
WSH411 are rated for operation over temperature range from 20 C to 100C and
voltage ranges from 2.8V to 20V.
Winson, 2005/8/12 1
WSH411
Winson reserves the right to make changes to improve reliability or manufacturability.
Name
P/I/O
Pin#
Description
VDD
P
Positive Power Supply
Vss
P
Ground
FG
O
Frequency Generator
OUT2
O
Output Pin 2
OUT1
O
Output Pin 1
Name
P/I/O
Pin#
Description
Vcc
P
Positive Power Supply
OUT1
O
Output Pin #1
OUT2
O
Output Pin #2
Vss
P
Ground
Name
P/I/O
Pin#
Description
Vcc
P
Positive Power Supply
OUT1
O
Output Pin #1
OUT2
O
Output Pin #2
FG
O
Frequency Generator
Vss
P
Ground
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 ------------------------ 500mA
Peak current Ip ------------------------- 1.2A
FG ON Current (continuous) If -------------------------- 20mA
Operating Temperature Range
Ta --------------------------
(-20C to +100C)
Storage Temperature Range
Ts --------------------------
(-65C to +150C)
Package Power Dissipation
Pd --------------------------
350mw for SOT-25
500mw for SIP-4L
SIP-5L
Winson, 2005/8/12 2
WSH411
Winson reserves the right to make changes to improve reliability or manufacturability.
(T=+25C, Vcc=2.8V to 20V)
Characteristic
Symbol Test Conditions
Min
Typ
Max Units
Supply Voltage
Vcc
V
Output Saturation
Voltage
Vout(sat) Vcc=20V, Ic=200mA
B > Bop
V
FG Saturation
Voltage
Vfg(sat) Vcc=20V, If=10mA
B > Bop
V
Output Leakage
Current
Ileakage Vcc=20V, B < Brp
<
uA
Supply Current
Isupply Vcc=20V, Output &
FG Open
mA
Output / FG Rising
Time
Tr
Vcc=12V, RL=820
CL=20Pf
3.0
us
Output / FG Falling
Time
Tf
Vcc=12V, RL=820
CL=20Pf
us
Output / FG Time
Differential
t
Vcc=12V, RL=820
CL=20Pf
us
Winson, 2005/8/12 3
WSH411
Winson reserves the right to make changes to improve reliability or manufacturability.
Characteristics
Symbol
Quantity
Ta= -20C to +100C
Min Typ. Max
Unit
Operate Point
Bop
Grade A
Grade B
Grade C
25 50
30
70
50 120
Gauss
Release Point
Brp
Grade A
Grade B
Grade C
-70 -25
-100 -30
-120 -50
Gauss
Hysteresis Window
Bop-Brp
40 200 Gauss
SIP- 4L: WSH411-XPA Elec. Grade
SIP- 5L: WSH411-XPC SIP-4L & SIP-5L:
SOT-25: WSH411-XPD
1: A Grade (50 Gauss)
2: B Grade (70 Gauss)
3: C Grade (120 Gauss)
Elec. Grade SOT-25:
1: A Grade (50 Gauss)
2: B Grade (70 Gauss)
Winson, 2005/8/12 4
WSH411
Winson reserves the right to make changes to improve reliability or manufacturability.
SIP-4L
SIP-5L
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WSH411
Winson reserves the right to make changes to improve reliability or manufacturability.
SOT-25
Winson, 2005/8/12 6
WSH411
Winson reserves the right to make changes to improve reliability or manufacturability.
SOT-25
Winson, 2005/8/12 7
WSH411
Winson reserves the right to make changes to improve reliability or manufacturability.
SIP-4L
Winson, 2005/8/12 8
WSH411
Winson reserves the right to make changes to improve reliability or manufacturability.
SIP-5L
Winson, 2005/8/12 9
WSH411
Winson reserves the right to make changes to improve reliability or manufacturability.
SOT-25
Figure 1.
SIP-4L
Figure 2.
Winson, 2005/8/12 10
WSH411
Winson reserves the right to make changes to improve reliability or manufacturability.
SIP-5L
Figure 3.
Winson, 2005/8/12 11
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