company blog about Allegro ACS711KEXLT-30AU Hall-Effect Linear Current Sensor With Overcurrent Fault Output For Isolation Applications

Allegro ACS711KEXLT-30AU Hall-Effect Linear Current Sensor With Overcurrent Fault Output For Isolation Applications

Shenzhen Mingjiada Electronics Co., Ltd., a renowned supplier of electronic components, now offers the Allegro ACS711KEXLT-30AU Hall-Effect linear current sensor, providing high-efficiency, highly reliable current detection solutions for clients across various industries.

【Product Overview】

The ACS711KEXLT-30AU is a Hall-effect-based linear current sensor chip featuring an integrated copper conductive path. When current flows through this path, it generates a magnetic field. This field is detected by the integrated Hall IC and converted into a proportional voltage output.

The ACS711KEXLT-30AU accurately measures both alternating and direct currents. Its EX-packaged internal conductor exhibits an extremely low resistance of just 0.6 mΩ, significantly reducing power dissipation and making it particularly suitable for applications demanding high energy efficiency.

The ACS711KEXLT-30AU provides a high signal bandwidth of 100 kHz, enabling it to meet the demands of high-speed switching applications. Designed for single-supply operation between 3.0V and 5.5V, it is compatible with 3.3V microprocessors.

Housed in a compact 12-pin QFN package (3x3mm), the ACS711KEXLT-30AU suits space-constrained applications. This sensor measures AC or DC currents within a ±30A range, featuring 90mV/A sensitivity.

The ACS711KEXLT-30AU delivers a high bandwidth of 100kHz and a fast response time of 4.6μs, enabling precise capture of current changes. It offers linearity of ±1% and accuracy of ±5%, operating within a temperature range of -40°C to 125°C to suit diverse environmental conditions.

Overcurrent fault detection constitutes a key feature of the ACS711KEXLT-30AU. Upon reaching 100% of full-scale current, the sensor locks and outputs a fault signal, providing critical system protection.

【Key Technical Parameters】

Sensing Type Hall Effect

Current Measurement Range ±30A

Internal Conductor Resistance 0.6 mΩ (EX Package)

Bandwidth 100 kHz

Supply Voltage 3.0V - 5.5V

Overcurrent Fault Detection Yes

Isolation Capability <100 V

Package Type QFN

Package Dimensions 3mm x 3mm x 0.75mm

【Overcurrent Fault Protection and Isolation Advantages】

The ACS711KEXLT-30AU incorporates overcurrent fault detection. When current reaches 100% of full scale, it triggers a trip and locks out, delivering reliable circuit protection for equipment.

Although suitable for isolation applications below 100 V, the ACS711KEXLT-30AU features electrically isolated terminals for its conductive path and sensor IC leads, providing sufficient internal creepage distance and clearance dimensions for low AC or DC operating voltage applications.

【Compact Design and Easy Integration】

The ACS711KEXLT-30AU utilises an extremely small 3mm x 3mm QFN package with a thickness of just 0.75mm. This compact design significantly saves PCB space, making it highly suitable for space-constrained applications.

As a fully integrated solution, it requires no external sense resistor, reducing the number of external components and assembly complexity. The ACS711KEXLT-30AU undergoes full factory calibration, ensuring high precision and extremely stable output offset voltage, thereby greatly simplifying the customer implementation process.

【Application Areas】

The ACS711KEXLT-30AU is suitable for a wide range of isolation applications below 100V, providing efficient current sensing solutions for various industries.

Industrial Automation and Motor Control

Within industrial settings, the ACS711KEXLT-30AU facilitates motor control and inverter management by providing real-time current monitoring, ensuring efficient and safe system operation. Its rapid response time (4.6μs) and 100kHz bandwidth enable it to capture swift current fluctuations during motor operation.

Domestic Appliances

Large household appliances represent another typical application scenario for the ACS711KEXLT-30AU. Within these devices, the sensor monitors energy consumption to enable intelligent power management while providing overcurrent protection, thereby enhancing system safety.

Communication Systems

Communication equipment requires stable power management. The ACS711KEXLT-30AU sensor enables precise current monitoring to prevent overloads, ensuring continuous and stable operation of communication devices.

Audio Equipment

In audio applications, the ACS711KEXLT-30AU optimises power output, delivering high-quality audio experiences while ensuring equipment safety.

Uninterruptible Power Supply (UPS)

Although search results do not explicitly mention the ACS711KEXLT-30AU's application in UPS systems, comparable current sensors (such as the Xinsen CM1A H00) have demonstrated their value within these systems. They detect equipment status, guarantee power stability, and provide safety protection.