OH41 Hall effect Latch IC
General Description
Part Number: OH41
Operate temperature: -40～150℃
Package: 1000pcs/bag
OH41 Hall effect Latch Switch IC is composed of a reverse protector, voltage regulator, Hall voltage generator, differential amplifier, Schmitt trigger and an open-collector output on a single silicon chip. It can convert the magnetic field signal into digital voltage output, in response to N and S alternating magnetic field.
Applications
Non-contact switch
Speed measurement
Position detection
Brushless DC motor
Features
High reliability
Good temperature performance
Anti-environmental stress
Reverse Polarity Protection
Absolute Maximum Ratings （TA=25℃）
Supply Voltage VCC••••••••••••••4.5-24V
Operating Temperature Range TA •••••••••••••••-40～150℃
Output Current IO•••••••••••••••••••25mA
Storage Temperature RangeTS ••••••••••••••••-65～150℃
al Application Circuits：
Precautions of OH Series Hall ICS
Hall ICs are sensitive devices which performance could be influenced in some extent by magnetic, optical, thermal and mechanical stress.
1) A pull-up resistor RL should be connected between the power supply (Vcc) and the output (Vout) since most of hall ICs are open collector output (OC output) circuits, such as OH44E, OH137, OH513, OH543. Hall ICs with Build-in Resistor are not necessary to add one, for example OH921.
2) Avoid reversing the power supply (Vcc) and the output (Vout) as well as no overload use. Be careful of the burn and damage caused by instant large current and instantaneous high voltage.
3) The Protection circuit should be added in the test circuits of hall ICs, such as large capacitor and a voltage stabilizing diode, which could absorb the effects of the external circuit and power fluctuation.
4) Try to minimize the mechanical stress applied to the device and leads during the installation, especially on the pins where close to the root of the device when bending shaping etc.
5) Strictly regulate the welding temperature and time. When manual welding, the temperature of soldering iron shall not exceed 260℃and time should be less than 3 seconds.
6) When designing, please fully consider the influence factors of temperature, magnetic field attenuation, the movement way, etc.
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