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PDF SS2509 Data sheet ( Hoja de datos )
| Número de pieza | SS2509 | |
| Descripción | Hall Latch - High Sensitivity | |
| Fabricantes | SEC | |
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Hay una vista previa y un enlace de descarga de SS2509 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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Packages
3 pin SOT23 (suffix SO)
SS2509
Hall Latch - High Sensitivity
3 pin SIP (suffix UA)
Features and Benefits
– Wide operating voltage range from 3.5V 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
– SOT23 3L or flat SIP 3L
both RoHS Compliant packages
Functional Block Diagram
VDD
Voltage
Regulator
Chopper
Rpull
OUT
Application Examples
– Automotive, Consumer and Industrial
– Solid-state switch
– Brushless DC motor commutation
– Speed detection
– Angular position detection
– Linear position detection
– Proximity detection
Hall
Plate
GND
UA Package
Pin 1 – VDD
Pin 2 – GND
Pin 3 – OUT
SO Package
Pin 1 – VDD
Pin 2 – OUT
Pin 3 – GND
General Description
The SS2509 is a bipolar Hall effect sensor IC fabri-
cated from mixed signal CMOS technology. The de-
vice 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.
1 V3.10 Nov 1, 2013
1 page  
SS2509
Hall Latch - High Sensitivity
state. The correct state is attained after the first excursion beyond BOP or BRP.
The SOT-23 device is reversed from the UA package. The SOT-23 output transistor will be latched on in the pres-
ence 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 gener-
ated by the chopper stabilization technique. As is shown in the two figures in next page, a 0.1μF capacitor is typi-
cal.
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 recom-
mended that the second following figure is used.
The low-pass filter formed by R1 and C1 and the Zener diode Z1 bypass the disturbances or voltage spikes occur-
ring on the device supply voltage VDD. The diode D1 provides additional reverse voltage protection.
Typical Three-Wire Application Circuit
C1 VDD
R2
OUT
SS2509
GND
C2
Automotive and Severe Environment Protec-
tion Circuit
R1:100
D1
Z1
VDD
C1
SS2509 OUT
GND
R2
C2
The SS2509 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.
5 V3.10 Nov 1, 2013
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet SS2509.PDF ] | |
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