سنسور و مبدل سنسور جریان

Product Attributes

Introduction

CT428 is a high-bandwidth, ultra-low-noise integrated contact current sensor that utilizes Allegro's proprietary XtremeSense™ TMR technology to enable high-accuracy current measurement in a wide range of industrial, consumer, and automotive applications. The device supports eight current ranges, with an integrated current-carrying conductor (CCC) capable of handling up to 65A, converting current measurements into a linear analog output voltage. The device's total output error is less than ±1.0% of full scale (FS). The device offers an output response time of approximately 300ns, a current consumption of approximately 6.0mA, and is immune to common-mode fields. The CT428 integrates an overcurrent detection (OCD) circuit to identify out-of-range currents (OCD) and outputs the result to a fault flag (FLT) pin. FLT is an open-drain, active-low digital signal driven by the CT428 to alert the microcontroller of a fault condition. The CT428 is offered in an industry-standard 8-pin SOIC package and is compliant with green and RoHS standards.

Features

• Integrated contact current sensing for mid-to-low current ranges: 0 to 20A, 0 to 50A, ±20A, ±50A, 0 to 30A, 0 to 65A, ±30A, ±65A
• Integrated current-carrying conductor (CCC)
• Linear analog output voltage, total error output ≤ ±1.0% FS
• Bandwidth: 1 MHz
• Response time: ~300 ns
• UL/IEC 62368-1 and UL1577 certified
• Rated isolation voltage: 3.5 kV_RMS
• Basic isolation working voltage: 560 V_RMS
• Reinforced isolation working voltage: 280 V_RMS
• Low noise: 9.0 to 13.5 mA_RMS (f_BW = 100 kHz)
• Supply voltage: 4.75 to 5.50 V
• Filtering function to reduce noise on output pin
• Common-mode field immunity: -54 dB
• Overcurrent detection
• Out-of-range current detection
• AEC-Q100 Grade 1 compliant
• 8-pin SOIC package

Applications

• Solar/power inverters
• UPS, switching power supplies, and telecom power supplies
• Motor control
• Power metering
• Overcurrent fault protection