سنسور و مبدل سنسور جریان

Product Attributes

Introduction

The MagnTek@ MT9221 product series is a fully integrated Hall Effect- based isolated linear current sensor device family designed for AC or DC current sensing in industrial, commercial, and communications systems. Each of the MT9221 consists of a precise, low- offset, linear Hall circuit with a low- resistance current conductor path located near the surface of the die. Applied current flowing through this low- resistance current conductor path generates a magnetic field that the Hall IC converts into a proportional voltage. The current is sensed differentially in order to reject common- mode fields, improving accuracy in magnetically noisy environments. Device accuracy is optimized through the close proximity of the magnetic field to the Hall transducer. A precise, proportional voltage is provided by the low- offset, chopper- stabilized BCD Hall IC, which has been accurately calibrated when it is manufactured. The output of the device has a positive slope (>VOQ) when an increasing current flows through the primary current conduction path (from pins 1 and 2, to pins 3 and 4). The internal resistance of this conductive path is 1.5 mΩ typical, providing low- power loss. The terminals of the conductive path are electrically isolated from the signal leads (pins 5 through 8). This allows the MT9221 current sensor IC to be used in high- side current sense applications without use other costly isolation techniques. The MT9221 family provides a variety of packages to customers: SOP- 8 and QFN- 12 for surface mount. All packages are RoHS compliant.

Features

• ±1.9% Typical Total Output Error
• ±0.5% Typical Linearity Over Temperature
• Fast Output Response Time: 4 μs (typ.)
• 150 kHz Signal Bandwidth
• 5.0 V Single Supply Operation
• -40°C - 125°C Operating Temperature
• Primary Conductor Resistance
  • 1.5mΩ (SOP-8)
  • 0.8mΩ (QFN-12)
• Sensing Current Range: (AC or DC)
  • ±6 A, ±10 A, ±20 A, ±25 A, ±30 A
  • +12 A, +20 A, +30 A
• Output Voltage Proportional to AC or DC Current
• Ratiometric Output from Supply Voltage
• Extremely Stable Quiescent Output Voltage
• Low-Noise Analog Signal Path
• Device Bandwidth is Set via FILTER Pin
• Near Zero Magnetic Hysteresis
• Isolation Voltage:
  • 2.6kVrms Dielectric Surge Isolation (SOP-8)
  • 500Vrms Dielectric Surge Isolation (QFN-12)
• Package Option:
  • SOP-8
  • QFN-12
• RoHS Compliant: (EU)2015/863

Applications

• Low-power inverter current sensing
• Motor phase and rail current sensing
• PV String Inverters
• Chargers and Converters
• Switching Power Supplies
• Overcurrent Protection