The CC6921B is a high-performance Hall effect current sensor that can more effectively measure DC or AC current. It features high accuracy, excellent linearity, and temperature stability, and is widely used in industrial, consumer, and communication equipment. The CC6921B integrates a high-precision, low-noise linear Hall circuit and a low-impedance main current conductor. The input current flows through the internal 0.45mΩ conductor, and the resulting magnetic field induces a corresponding electrical signal on the Hall circuit. After internal processing, a voltage signal is output, making the product easy to use. The low-impedance conductor minimizes power loss and heat dissipation, and the internal inherent insulation provides a basic operating isolation voltage of 1000VRMS and an insulation withstand voltage of 3750V (AC) between the input current path and the secondary circuit. The linear Hall circuit is manufactured using an advanced BiCMOS process and includes a high-sensitivity Hall sensor component, a Hall signal preamplifier, a common-mode magnetic field suppression circuit, a temperature compensation unit, an oscillator, a dynamic offset elimination circuit, and an amplifier output module. With no current, the static output is 50%VCC. The integrated differential common-mode suppression circuit in the CC6921B allows the chip output to be unaffected by external interfering magnetic signals; the integrated dynamic offset elimination circuit ensures that the IC's sensitivity is not affected by external pressure and IC packaging stress. The CC6921B is available in a SOP16W package, with an operating temperature range of -40 to +125°C, and is RoHS compliant.

• Wide range of current measurement, with multiple ranges available: 5A, 10A, 20A, 25A, 30A, 40A, 50A, 65A, 75A, 100A
• 1.2MHz chopping frequency, high bandwidth, low noise, single-ended analog output. High isolation voltage, with 3750V (AC) safety isolation voltage between the lead wires and signal pins.
• Low loss, wire resistance 0.45mΩ
• High bandwidth, up to 250kHz, step response time 1.2us
• 1% error at room temperature, ±3% error over the full temperature range
• Good temperature stability, using patented Hall signal amplification and temperature compensation circuits
• Differential Hall structure, strong resistance to external magnetic interference. Resistant to mechanical stress; magnetic parameters will not shift due to external pressure.
• ESD (HBM) 4000V

Applications

• Motor control
• Load monitoring system
• Switching power supply
• Overcurrent fault