ACS711EX Current Sensor -15.5A / +15.5A
This current sensor is based on Allegro's ACS711KEXLT-15AB-T Hall effect with overcurrent fault output It is a carrier board or main board for the based linear current sensor; Therefore, before using this product
ACS711 datasheet
Technical Features
- Designed for bidirectional input current from 15.5 A to 15.5 A (rugged sensor IC can allow 100 ms transient current up to 100 A).
- The conductor path internal resistance is typically 0.6 mΩ and the PCB is made with 2 oz copper so there is very little power dissipation on the board.
- Using a Hall effect sensor allows the IC to extend the current path of the sensor. It is electrically disconnected from the electronics (for applications up to 100 V), allowing the sensor to be placed anywhere along the existing path and used in applications where required. electrical isolation
- 100 kHz bandwidth.
- Good accuracy and reliability: factory calibration gives a typical total error of ±5% at room temperature, the output offset voltage is extremely stable and the sensor has zero magnetic hysteresis
- Overcurrent FAULT output latches low when current magnitude exceeds 15.5 A.
- Operating temperature from -40°C to 125°C
This 15.5 A current sensor is marked with a black X. We also sell the 31 A version which uses the same carrier PCB; You can distinguish the versions by reading the text on the IC or by looking at the color of the X on the bottom screen.
Using the Sensor
The sensor requires a supply voltage of 3 V to 5.5 V to be connected to the Vcc and GND pads labeled on the bottom screen. hears. The sensor outputs an analog voltage that is linearly proportional to the input current. The quiescent output voltage is Vcc/2 and varies with 90 mV per input current (when Vcc = 3.3 V), positive current increases the output voltage and negative current decreases the output voltage. The relationship between the instantaneous input current, i, and the sensor output voltage VOUT can be represented by the following equations:
The FAULT pin is normally high and latches when the current exceeds ± 15.5 A. When the FAULT pin is latched low, the only way to reset it is to turn the Vcc pin on and off. In our tests, this module was able to handle 15°C continuous current without exceeding 50°C, with no cooling beyond the heat dissipation of the PCB.
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