Microchip PAC1954

The PAC1954 is a quad power monitor and energy monitor that reports on bus voltage and sense voltage 16-bits of resolution.  Power is reported as a simultaneous product of two 16-bit independent bus and sense voltages.  All registers are accessible through I2C / SMBus including an 8 sample average for reading stability.  The device can detect over/undervoltage, over/undercurrent and overpower against user programmed limits for each channel and generate ALERT outputs.

Features

• High-side/low-side power monitor with four channels
  • 100 mV full-scale range (configurable to 50 mV)
  • External sense resistor sets the full-scale range current
• 16-bit resolution sense current
  • Voltage monitor with wide VBUS range
  • 0V to 32V FSR (configurable to 16V)
  • 16-bit resolution
• Real-time auto-calibration of offset error for voltage and current
• 1% power measurement accuracy over a wide dynamic range
• On-chip accumulation of 30-bit power results for energy measurement
  • User programmable sampling rates of 8, 64, 256 and 1024
  • 5120 SPS for a single-channel burst mode
• 2.7V to 5.5V supply operation
  • 1.62-5.5V capable I2C/SMBus and digital I/O
  • SMBus 3.1 and I2C fast mode plus, 1 Mbps
  • High-speed mode of 3.4 Mbps
• ALERT on over/undervoltage and current or overpower conditions
• AEC-Q100 qualified (VQFN)
• Available packages:
  • 3 × 3 mm 16-lead VQFN with wettable flanks
  • 2.225 × 2.17 mm 16-ball WLCSP
  • 2.215 × 2.16 x 0.319 mm 16-ball WLCSP

Applications

• Automotive applications
• Cloud, Linux® and server computing
• Industrial applications
• Optical networking modules

DT100119 - Evaluation Board for PAC1954

This board enables easy connection of the PAC1954 to power sources and loads for power monitoring and energy metering using on board 4mOhm high side current sensing resistors. It has USB connection to PC and a GUI to display the data, as well as options to disconnect the PC and communicate directly with a different host controller. Measurement channels 1,2 and 3 are pre-populated to show demo currents and they can be switched to the external input sense resistors by moving two 0 Ohm resistors on each channel.