Power Monitoring Chips Reduce BoM Costs

power monitoring

New power monitoring chips improve measurement accuracy for embedded computing & networking

Managing and reducing power consumption is crucial in low-voltage, high-power applications such as Field-Programmable Gate Arrays (FPGAs), Graphics Processing Units (GPUs) and embedded computing devices. However, precision power measurement solutions for energy savings are often costly and require multiple integrated circuits (ICs) or power configurations to measure different rails.

To meet these needs, Microchip has launched new two- and three-channel power monitoring devices that measure from 0V to 32V on a single chip. The devices offer designers solutions that are easy to adopt and improved power measurement for low voltage, high power applications in markets such as embedded computing and networking, according to the company.


The two-channel device is also claimed the industry’s first with native 16-bit resolution, providing leading flexibility across a wide measurement range.

Two- and three-channel Power monitoring solutions

The PAC1932/33 integrate multiple channels in a single package for applications such as Point of Sale (POS) systems, ATMs and building automation. This reduces costs for system designers while also consolidating their Bill of Materials (BOM), as the measurement of sub 1V to 20V voltage rails normally require separate components to measure each rail efficiently, Microchip noted.

Additionally, the devices’ ability to measure voltage rails under 1V to as high as 32V also relieves developers from having to reconfigure measurement resolution between low and high current load events.

The PAC1932 can measure without host intervention for 17 minutes, relieving developers from adjusting voltage or current range to measure power and energy.

The devices include two 16-bit Analog-to-Digital Converters (ADCs) that can measure voltage and current simultaneously, enabling developers to extract a true power measurement. As a result, developers can better design systems to efficiently save power, the company further said.

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Development Tools

The PAC1932/33 work in conjunction with Linux and Windows 10 software drivers. The ADM00805 evaluation board can be used to start development with a graphical user interface reporting VSENSE, VBUS, power and accumulated power.

Pricing and Availability

The two-channel PAC1932 power monitoring IC is available now for sampling and in volume production starting at $0.78 each in 10,000-unit quantities.

The three-channel PAC1933 power monitoring IC is available now for sampling and in volume production starting at $0.94 each in 10,000-unit quantities.

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