Hall effect current sensorCommon applications: Hall effect current sensors using 3.3 V power supply; Hall effect current sensor with 5V power supply

In the layout of circuit boards using Hall effect current sensors, the following factors should be noted:

• Heat dissipation: Increasing the copper coating area of the primary side current wire as much as possible can improve the heat dissipation capability of the Hall current sensor, thereby increasing the maximum average current tolerance of the sensor. In addition, thicker copper foil PCBs can be used, or some heat dissipation vias can be placed on the primary wiring, or the Hall current sensor and PCB wiring can be placed in the air duct to improve the average current tolerance of the Hall current sensor.

  
  

• Primary side current magnetic field: During layout, it is advisable to avoid high current wiring near the Hall current sensor as much as possible.

• Isolation requirement: Considering the creepage distance and electrical clearance from the perspective of the overall system, whenHall Current Sensor When the required PCB creepage distance cannot be met, grooves can be dug on the circuit board to achieve system level isolation requirements.

In summary, CT is more suitable for peak current control and overcurrent protection in telecommunications rectifiers and server PSUs, but it has a larger volume and lower accuracy.Hall effect current sensorSmall size, high accuracy, simple and convenient to use, and more suitable for detecting AC line current.