OH443 unipolar hall IC

Part No: OH443

Function: Unipolar

Operating voltage: 4.5-30V

Output Current: 50mA

Operating Point (Bop): <20mT

Release Point(Brp): >2mT

Operating Temp: -40~ 150℃

Package: TO92S


OH443 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 and output a digital voltage signal. With the typical feature of wide range of working Voltage, operate temperature and high load capacity, OH443 performs well in many applications, such as position control, speed detection and flow detection as a non-contact magnetic sensor.


  • High load capacity
  • The good consistency
  • A wide range of power supply voltage
  • high reliability


  • The brushless DC motor, DC fans, DC water pump
  • The home appliance control panel
  • Sewing equipment, textile machinery
  • Speed sensor, position detecting, counting
  • The flow sensor, flow meter
  • The autoignition, safety alarm device
  • other industrial control fields

Absolute Maximum Ratings (TA=25℃)

Supply Voltage VCC··············3.8-30V

Output Current IO·················50mA

Operating Temperature Range TA ········-40~150℃

Storage Temperature RangeTS ················-65~150℃


Electrical Characteristics (Ta= 25°C)

Parameter Symbol Conditions Value Unit
Min Typ Max
Supply Voltage VCC 4 30 V
Output Saturation Voltage VOL VCC=5V,  RL=1KΩ,  B≥BOP 200 400 mV
Output Leakage Current IOH Vo=Vccmax , B≤BRP 1.0 10 μA
Supply Current ICC Vo=Vccmax , B≤BRP 5 mA
Output Rise Time tr Vcc=5V, RL=1KΩ, CL=20pF 0.5 μS
Output Falling Time tf 0.5 μS


Magnetic Characteristics (Ta= 25°C) (1mT = 10 Gauss)

Parameter symbol Value Unit
Min Typ Max
Operate Point BOP 20 mT
Release Point BRP 3 mT
Hysteresis BH 5 7 mT


OH443 Unipolar hall IC for high temperature