SS569
Hall Latch - High Sensitivity
Packages
Features and Benefits
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Wide operating voltage range from 2.5V to 24V
High magnetic sensitivity – Multi-purpose
CMOS technology
Low current consumption
Chopper-stabilized amplifier stage
Output driver with internal pull-up resistor
Superior temperature stability
Insensitive to physical stress
Tiny SOT23 3L or flat SIP 3L
both RoHS Compliant packages
3 pin SOT23 (suffix SO)
3 pin SIP (suffix UA)
Functional Block Diagram
VDD
Voltage
Regulator
Application Examples
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Automotive, Consumer and Industrial
Solid-state switch
Brushless DC motor commutation
Speed detection
Angular position detection
Linear position detection
Proximity detection
OUT
Chopper
Hall
Plate
GND
SIP Package
Pin 1 – V
DD
Pin 2 – GND
Pin 3 – OUT
SOT Package
Pin 1 – V
DD
Pin 2 – OUT
Pin 3 – GND
General Description
The SS569 is a bipolar Hall effect sensor IC fabricated
from mixed signal CMOS technology. The device
integrates a voltage regulator, Hall sensor with dynamic
offset cancellation system, Schmitt trigger and an output
driver with internal pull-up resistor, all in a single
package.
It incorporates advanced chopper stabilization techniques to provide accurate and stable magnetic switch points. There
are many applications for this HED – Hall Electronic Device - in addition to those listed above. The design,
specifications and performance have been optimized for commutation applications in 5V and 12V brushless DC
motors.
Thanks to its wide operating voltage range and extended choice of temperature range, it is quite suitable for use in
automotive, industrial and consumer applications.
The device is delivered in a Small Outline Transistor (SOT) for surface mount process or in a Plastic Single In Line
(SIP 3L flat) for through- hole mount. Both 3-lead packages are RoHS compliant.
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SS569
Hall Latch - High Sensitivity
Glossary of Terms
MilliTesla (mT), Gauss
RoHS
SOT
ESD
BLDC
Operating Point (B
OP
)
Release Point (B
RP
)
Units of magnetic flux density: 1mT = 10 Gauss
Restriction of Hazardous Substances
Small Outline Transistor (SOT package) - also referred with the package code “SO”
Electro-Static Discharge
Brush-Less Direct-Current
Magnetic flux density applied on the branded side of the package which turns the output
driver ON (V
OUT
= V
DSon
)
Magnetic flux density applied on the branded side of the package which turns the output
driver OFF (V
OUT
= high)
Unique Features
Based on mixed signal CMOS technology, SS569 is a Hall-effect device with high magnetic sensitivity. This
multi-purpose latch meets most of the application requirements.
The chopper-stabilized amplifier uses switched capacitor technique to suppress the offset generally observed with Hall
sensors and amplifiers. The CMOS technology makes this advanced technique possible and contributes to smaller chip
size and lower current consumption than bipolar technology. The small chip size is also an important factor to
minimize the effect of physical stress. This combination results in more stable magnetic characteristics and enables
faster and more precise design.
The wide operating voltage from 2.5V to 24V, low current consumption and large choice of operating temperature
range according to “L”, and “E” specification make this device suitable for automotive, industrial and consumer
applications.
Pin Definitions and Descriptions
SOT Pin
№
SIP Pin
№
1
2
3
1
3
2
Name
VDD
OUT
GND
Type
Supply
Output
Ground
Function
Supply Voltage pin
Open Drain Output pin
Ground pin
Table 1: Pin definitions and descriptions
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SS569
Hall Latch - High Sensitivity
Absolute Maximum Ratings
Parameter
Symbol
Value
Units
Supply Voltage
V
DD
28
V
Supply Current
I
DD
50
mA
Output Voltage
V
OUT
28
V
Output Current
I
OUT
50
mA
Storage Temperature Range
T
S
-50 to 150
°C
T
J
Maximum Junction Temperature
165
°C
Table 2: Absolute maximum ratings
Operating Temperature Range Symbol
Value
Units
Temperature Suffix “E”
T
A
-40 to 85
°C
Temperature Suffix “L”
T
A
-40 to 150
°C
Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum-rated
conditions for extended periods may affect device reliability.
General Electrical Specifications
DC Operating Parameters T
A
= 25℃, V
DD
= 2.5V to 24V (unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
24
5
0.5
10
Units
V
mA
V
µA
µs
µs
kΩ
KHz
°C/W
Supply Voltage
V
DD
Operating
2.2
Supply Current
I
DD
B < B
RP
Output Saturation Voltage
V
DSon
I
OUT
= 20mA, B > B
OP
Output Leakage Current
I
OFF
B < B
RP
V
OUT
= 24V
1
Output Rise Time
t
r
R
L
= 1kΩ, C
L
= 20pF
0.25
Output Fall Time
t
f
R
L
= 1kΩ, C
L
= 20pF
0.25
Internal pull-up resistor
Rpu
---
9
12
Maximum Switching Frequency F
SW
---
10
Package Thermal Resistance
R
TH
Single layer (1S) Jedec board
301
Table 3: Electrical Specifications
Note:
The output of SS569 will be switched after the supply voltage is over 2.2V, but
characteristics won't be normal until the supply is over 2.5V.
15
the magnetic
Output Behavior versus Magnetic Pole
DC Operating Parameters T
A
= -40℃ to 150℃, V
DD
= 2.5V to 24V (unless otherwise specified)
Parameter
Test Conditions (SO)
OUT (SO)
High
Low
Test Conditions (UA)
B > B
OP
B < B
RP
OUT (UA)
Low
High
South pole
B < B
RP
North pole
B > B
OP
Table 4: Output behavior versus magnetic pole
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SS569
Hall Latch - High Sensitivity
Magnetic Specifications
DC Operating Parameters V
DD
= 2.5V to 24V (unless otherwise specified)
SS569
Parameter
Operating Point
Release Point
Hysteresis
Operating Point
Release Point
Hysteresis
Operating Point
Release Point
Hysteresis
Symbol
B
OP
B
RP
B
HYST
B
OP
B
RP
B
HYST
B
OP
B
RP
B
HYST
Test Conditions
E spec., T
A
= 85°C
Min
10
-30
8
-35
5
-40
Typ
18
-18
36
18
-18
36
18
-18
36
Max
30
-10
35
-8
40
-5
Units
G
G
G
G
G
G
G
G
G
E spec., T
A
= 85°C
L spec., T
A
= 150°C
Table 4: Magnetic Specifications
Detailed General Description
The SS569 exhibits latch magnetic switching characteristics. Therefore, it requires both south and north poles to
operate properly.
The OUT pin of these devices switches low (turns on) when a magnetic field perpendicular to the Hall sensor exceeds
the operate point threshold, B
OP
. After turn-on, the output voltage is V
DSon
. Note that the device latches, that is, a south
pole of sufficient strength towards the branded surface of the device turns the device on. The device remains on if the
south pole is removed (B→0). This latching property defines the device as a magnetic memory.
When the magnetic field is reduced below the release point, B
RP
, the OUT pin turns off (goes high). The difference in
the magnetic operating and release points is the hysteresis, B
HYST
, of the device. This built-in hysteresis prevents
output oscillation near the switching point, and allows clean switching of the output even in the presence of external
mechanical vibration and electrical noise.
The device behaves as a latch with symmetric operating and release switching points (B
OP
=|B
RP
|). This means
magnetic fields with equivalent strength and opposite direction drive the output high and low.
Powering-on the device in the hysteresis region (less than B
OP
and higher than B
RP
) allows an indeterminate output
state. The correct state is attained after the first excursion beyond B
OP
or B
RP
.
The SOT-23 device is reversed from the UA package. The SOT-23 output transistor will be latched on in the presence
of a sufficiently strong North pole magnetic field applied to the marked face.
Output level
OUT = High
OUT = High
Output level
B
HYST
B
HYST
OUT = Low
B
RP
-18Gs typ
OUT = Low
0mT
B
OP
18Gs typ
Flux density
B
RP
-18Gs typ
0mT
B
OP
18Gs typ
Flux density
UA package - Latch characteristic
SO package - Latch characteristic
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SS569
Hall Latch - High Sensitivity
Application Information
It is strongly recommended that an external bypass capacitor be connected (in close proximity to the Hall sensor)
between the supply (VDD Pin) and ground (GND Pin) of the device to reduce both external noise and noise generated
by the chopper stabilization technique. As is shown in the two figures in next page, a 0.1μF capacitor is typical.
For reverse voltage protection, it is recommended to connect a resistor or a diode in series with the VDD pin. When
using a resistor, three points are important:
- the resistor has to limit the reverse current to 50mA maximum (V
CC
/ R1
≤
50mA)
- the resulting device supply voltage V
DD
has to be higher than V
DD
min (V
DD
= V
CC
– R1*I
DD
)
- the resistor has to withstand the power dissipated in reverse voltage condition (P
D
= V
CC 2
/R1)
When using a diode, a reverse current cannot flow and the voltage drop is almost constant (≈0.7V).
Therefore, a 100Ω/0.25W resistor for 5V application and a diode for higher supply voltage are recommended. Both
solutions provide the required reverse voltage protection.
When a weak power supply is used or when the device is intended to be used in noisy environment, it is recommended
that the figure 13.3 from the Application Information section is used.
The low-pass filter formed by R1 and C1 and the Zener diode Z1 bypass the disturbances or voltage spikes occurring
on the device supply voltage V
DD
. The diode D1 provides additional reverse voltage protection.
Typical Three-Wire Application Circuit
Automotive and Severe Environment
Protection Circuit
R1:100
C1
VDD
R2
OUT
C2
GND
GND
D1
Z1
C1
VDD
R2
OUT
C2
SS569
SS569
The SS569 have been optimized for commutation applications in 5V and 12V brushless DC motors. The follow figure
is the typical application circuit for 3 phase brushless DC motors.
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