سنسور و مبدل سنسور جریان

Product Attributes

Introduction

The CC6921B device is a high-performance current sensor based on Hall Effect. The device provides precise and economical solutions for AC or DC current sensing in industrial, commercial and communication equipment. The CC6921B device consists of a precise, low-offset, linear Hall circuit with a copper conduction path located near the surface of the die. When current flows through the copper conduction path, a magnetic field generates. Meanwhile the Hall circuit converts this magnetic signal to output voltage signal. Internal copper conductor’s resistance is typical 0.45 mΩ, which provides much less power loss than the universal resistor sampling method. Otherwise, its internal inherent insulation provides 1000 VRMS basic working isolation voltage and 3750V (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 element, oscillator, Hall signal pre-amplifier, CrossChip® patented temperature compensation circuit, dynamic offset cancellation circuit, sensitivity trimming circuit and output amplifier. Zero current output voltage is 50% VCC. When power supply voltage is 3.3V, the linear output voltage range is 0.33 ~ 2.97 V, the linearity can reach 0.1%. CC6921B 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/25A/30A/40A/50A/65A/75A/100A
• 1.2MHz chopper frequency, high bandwidth, low noise, single ended analog output
• High isolation and withstand voltage (3750V(AC) isolation voltage between pins 1 - 8 and 9 - 16)
• Less power loss, internal conductor’s resistance is 0.45 mΩ
• High bandwidth, up to 250KHz, 1.2 μs output rise time in response to step input current
• Total output error ±1% at Ta = 25 ℃ and ±3% at Ta = - 40 - 125 ℃
• CrossChip® patented temperature compensation
• Outputs desensitized to mechanical stress
• Differential Hall structure, strong resistance to external magnetic interference
• ESD (HBM) 4000V
• Operating ambient temperature: - 40 - 125 ℃

Applications

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