SS2309

SS2309
Hall Latch - High Sensitivity
Packages
Features and Benefits
–
3 pin SOT23 (suffix SO)
–
–
–
–
–
–
–
–
3 pin SIP (suffix UA)
Functional Block Diagram
Application Examples
VDD
Voltage
Regulator
Wide operating voltage range from 3.5V to
24V
High magnetic sensitivity – Multi-purpose
CMOS technology
Low current consumption
Chopper-stabilized amplifier stage
Open drain output
Superior temperature stability
Insensitive to physical stress
SOT23 3L and flat SIP 3L
both RoHS Compliant packages
OUT
Chopper
–
–
–
–
–
–
–
Automotive, Consumer and Industrial
Solid-state switch
Brushless DC motor commutation
Speed detection
Angular position detection
Linear position detection
Proximity detection
Hall
Plate
General Description
GND
SIP Package
Pin 1 – VDD
Pin 2 – GND
Pin 3 – OUT
The SS2309 is a 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
open-drain output driver, all in a single package.
SOT Package
Pin 1 – VDD
Pin 2 – OUT
Pin 3 – GND
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 (TO92) for through- hole mount. Both 3-lead packages are RoHS compliant.
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SS2309
Hall Latch - High Sensitivity
Glossary of Terms
MilliTesla (mT), Gauss
RoHS
SOT
ESD
BLDC
Operating Point (BOP)
Release Point (BRP)
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 (VOUT = VDSon)
Magnetic flux density applied on the branded side of the package which turns the
output
driver OFF (VOUT = high)
Unique Features
Based on mixed signal CMOS technology, the SS2309 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 3.5V to 24V, low current consumption and large choice of operating temperature
range according to “E”, “K” and “L” 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
Type
Function
VDD
OUT
GND
Supply
Output
Ground
Supply Voltage Pin
Open Drain Output Pin
Ground Pin
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SS2309
Hall Latch - High Sensitivity
Absolute Maximum Ratings
Parameter
Supply Voltage
Supply Current
Output Voltage
Output Current
Storage Temperature Range
Maximum Junction Temperature
Symbol
VDD
IDD
VOUT
IOUT
TS
TJ
Value
28
50
28
50
-50 to 150
165
Units
V
mA
V
mA
°C
°C
Operating Temperature Range
Temperature Suffix “E”
Temperature Suffix “K”
Temperature Suffix “L”
Symbol
TA
TA
TA
Value
-40 to 85
-40 to 125
-40 to 150
Units
°C
°C
°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 TA = 25°C, VDD= 3.5V to 24V (unless otherwise specified)
Parameter
Symbol
Supply Voltage
Supply Current
Output Saturation Voltage
Output Leakage Current
Output Rise Time
Output Fall Time
Maximum Switching Frequency
Package Thermal Resistance
VDD
IDD
VDSon
IOFF
tr
tf
FSW
RTH
Test Conditions
Min
Operating
B < BRP
IOUT = 20mA, B > BOP
B < BRP VOUT = 24V
RL = 1kΩ, CL = 20pF
RL = 1kΩ, CL = 20pF
--Single layer (1S) Jedec board
3.5
Typ
1
0.25
0.25
10
301
Max
Units
24
5
0.5
10
V
mA
V
µA
µs
µs
KHz
°C/W
Note: The output of SS2309 will be switched after the supply voltage is over 2.2V, but the magnetic characteristics will not be
normal until the supply is over 3.5V.
Magnetic Specifications
DC Operating Parameters VDD = 3.5 to 24V (unless otherwise specified)
Package
Parameter
Symbol
Operating Point
BOP
Test Conditions
Min
Typ
Max
Units
5
15
40
G
-40
-15
-5
G
Ta=25°C
UA
Release Point
BRP
Hysteresis
BHYST
Operating Point
BOP
Vdd=5V DC
30
G
-40
-15
-5
G
5
15
40
G
Ta=25°C
SO
Release Point
Hysteresis
BRP
Vdd=5V DC
BHYST
30
3
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SS2309
Hall Latch - High Sensitivity
Output Behavior versus Magnetic Pole
DC Operating Parameters TA = -40°C to 150°C, VDD = 3.5 to 24V (unless otherwise specified)
Test Conditions (UA)
Test Conditions (SO)
OUT
B < BRP
B > BRP
High
B > BOP
B < BOP
Low
The SOT-23 device is reversed from the UA package. The SOT-23 output transistor will be turned on(drops low) in the presence of a
sufficiently strong North pole magnetic field applied to the marked face and turned off(hoists high) in the presence of a sufficiently
strong South pole magnetic field.
Detailed General Description
The SS2309 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, BOP. After turn-on, the output voltage is VDSon. 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, BRP, the OUT pin turns off (goes high). The difference
in the magnetic operating and release points is the hysteresis, BHYST, 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 (BOP=|BRP|). 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 BOP and higher than BRP) allows an indeterminate output
state. The correct state is attained after the first excursion beyond BOP or BRP.
Output level
Output level
OUT = High
OUT = High
BHYS
BHYS
OUT = Low
OUT = Low
BRP
-15Gs typ
0mT
BOP
15Gs typ
BRP
-15Gs typ
Flux density
UA package - Latch characteristic
0mT
BOP
15Gs typ
Flux density
SE package - Latch characteristic
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SS2309
Hall Latch - High Sensitivity
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.
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 following two figures, a 0.1μF capacitor is typical.
Typical Three-Wire Application Circuit
VDD
C1
SS2309
R2
OUT
C2
GND
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 (VCC / R1 ≤ 50mA)
- the resulting device supply voltage VDD has to be higher than VDD min (VDD = VCC – R1*IDD)
- the resistor has to withstand the power dissipated in reverse voltage condition (PD = VCC2/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 the following figure 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 VDD. The diode D1 provides additional reverse voltage protection.
Automotive and Severe Environment Protection Circuit
R1:100
VDD
C1
D1
Z1
SS2309
R2
OUT
C2
GND
The SS2309 have been optimized for commutation applications in 5V and 12V brushless DC motors. The following figure in the next page is the typical application circuit for 3 phase brushless DC motors.
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SS2309
Hall Latch - High Sensitivity
ESD Precautions
Electronic semiconductor products are sensitive to Electro Static Discharge (ESD).
Always observe Electro Static Discharge control procedures whenever handling semiconductor products.
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SS2309
Hall Latch - High Sensitivity
Package Information
2.13
1.87
0.75 ± 0.05
1.52 ± 0.1
Package UA, 3-Pin SIP:
3° ± 1°
1.00
1.20
45° ± 1°
4.0 ± 0.01
1
2
3
3.0 ± 0.01
Sensor Location
Active Area Depth:
0.84(Nom)
3° ± 1°
6° ± 1°
3° ± 1°
6° ± 1°
1
2
0.05 ± 0.05
3
1.6.± 0.1
0.44± 0.01
0.38 ± 0.01
14 .5 ± 1
0.39± 0.01
Notes:
1). Controlling dimension : mm ;
2). Leads must be free of flash and plating voids ;
3). Do not bend leads within 1 mm of lead to package
interface ;
4). PINOUT: Pin 1 VDD
Pin 2 GND
Pin 3 Output
1.27
2.54
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SS2309
Hall Latch - High Sensitivity
Package SO, 3-Pin SOT-23:
Notes
1). PINOUT:
Top
3
2.60
1.50 3.00
1.80
1
Pin 1 VDD
Pin 2 Output
Pin 3 GND
2). All dimensions are in millimeters;
2
1.70
2.10
Side Vie
End
2.70
3.10
0.10
0.25
1.00
1.30
0.70
0.90
0.20
Min
0.00
0.10
0.35
0.50
SOT-23 Package Hall Location:
Bottom View of SOT-23 Package
3
Chip
0.56
0.66
0.95
2
1
1.50
Ordering Information
Part No.
Pb-free
Temperature Code
Package Code
Packing
SS2309ESOT
YES
-40°C to 85°C
SOT-23
7-in. reel, 3000 pieces/reel
SS2309EUA
YES
-40°C to 85°C
TO-92
Bulk, 1000 pieces/bag
SS2309KSOT
YES
-40°C to 125°C
SOT-23
7-in. reel, 3000 pieces/reel
SS2309KUA
YES
-40°C to 125°C
TO-92
Bulk, 1000 pieces/bag
SS2309LSOT
YES
-40°C to 150°C
SOT-23
7-in. reel, 3000 pieces/reel
SS2309LUA
YES
-40°C to 150°C
TO-92
Bulk, 1000 pieces/bag
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