سنسور و مبدل سنسور جریان

Product Attributes

Introduction

The CC6921 device is a high-performance Hall-effect current sensor that can measure DC or AC current more efficiently, and has the advantages of high accuracy, excellent linearity and temperature stability in industrial, consumer, and communication equipment. The CC6921 device consists of a high-precision, low-noise linear Hall integrated circuit and a low-resistance main current conductor. Internal copper conductor’s resistance is typical 0.14mΩ, which provides much less power loss than the universal resistor sampling method. Otherwise, its internal inherent insulation provides 1000VRMS basic working isolation voltage and 3200V (AC) insulation withstand voltage between the input current path and the secondary circuit. The Hall circuit based on BiCOMS process integrates a high sensitivity Hall sensor assembly, Hall signal pre-amplifier, common mode magnetic field suppression circuit, temperature compensation unit, oscillator, dynamic offset cancellation circuit and amplifier output module. Zero current output voltage is 50%VCC. When power supply voltage is 5V, the linear output voltage range is 0.2~4.8V, the linearity can reach 0.1%. The differential common-mode suppression circuit integrated in CC6921 can make the chip output unaffected by external interference magnetic signals. The integrated dynamic offset elimination circuit makes the sensitivity of the chip independent of external stress and chip packaging stress. CC6921 is available in SOP16W package. It’s operating ambient temperature range is -40~125℃. Comply with ROHS requirements.

Features

• Zero current output voltage is 50%VCC
• Current sensing range available: 5A/10A/20A/30A/50A/65A/75A/100A
• 1.2MHz chopper frequency, low noise, single ended analog output
• High isolation and withstand voltage (3200V(AC) isolation voltage between pins 1 - 8 and 9 - 16)
• Less power loss, internal conductor’s resistance is 0.45mΩ
• High bandwidth, up to 250kHz, 1.2us output rise time in response to step input current
• Total output error 1% at Ta = 25℃
• Good temperature stability, using Hall signal amplification circuit and temperature compensation circuit
• Differential Hall structure, strong resistance to external magnetic interference
• Strong resistance to mechanical stress, magnetic parameters will not be offset by external pressure
• ESD (HBM) 6kV

Applications

• Motor controller
• Load detection and management
• Switch - mode power supplies
• Over - current fault protection