4-Channel Voltage Bus and 4-Channel High-Side Current Shunt Monitor, 26 V



The NCP45491 is a high-performance monolithic IC which can be used to monitor bus voltage and current on four high-voltage power supplies simultaneously. The HV bus voltages and currents are translated to a low-voltage power domain and multiplexed onto a single differential output for measurement externally by common ADCs. The device is configurable to operate either standalone or as a pair, permitting up to eight separate HV power supplies to be monitored and measured.

  • Power Monitoring and Management
  • Power Control Loops
  • Graphical Cards
  • Desktop Computers
  • Notebooks
  • Set-top boxes
  • Enterprise Servers
  • Telecom Equipment
  • Translates and scales voltage and currents on buses up to 26V
  • Single device monitors up to 4 supplies
  • Ultra-low offset shunt amplifier (<150μV)
  • May Be Paired for Monitoring Up To Eight Supplies
  • Very low power down current
  • All Channels Individually Gain Programmable by External Resistor Selection
  • Fast Settling Time
  • Real-Time Indication of All Bus Voltages Valid
  • Adjustable Output Common-Mode Voltage Adapts to Most External ADCs
  • Lead-Free Device

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