OH4N Unipolar Hall Effect IC (N pole)
General Description:
Part No.: OH4N Operate temperature: -40～150℃ Package:3000pcs/Reel
OH4N unipolar hall IC includes an on-chip Hall voltage generator for magnetic sensing, an amplifier that amplifies the Hall voltage, a schmitt trigger to provide switching hysteresis for noise rejection, and an open-collector output. It detects the changes of Magnetic field (N pole) and output a digital voltage signal. With the typical feature of wide range of working Voltage, operate temperature and high load capacity, OH4N performs well in many applications, such as position control, speed detection and flow detection as a non-contact magnetic sensor.
Features
High load capacity
The good consistency
A wide range of power supply voltage
High reliability
Working with N pole
Applications
The brushless DC motor, DC fans, DC water pump
The home appliance control panel
speed sensor, position detecting, counting
The auto ignition
safety alarm device
Absolute Maximum Ratings （TA=25℃）
Supply Voltage VCC••••••••••••••3.8-30V Operating Temperature Range TA ••••••••-40～150℃
Output Current IO•••••••••••••••••50mA Storage Temperature RangeTS ••••••••••••••••-65～150℃-
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. |
