Single power monitoring IC measures power from 0V to 32V 

August 14, 2018 Jamie Leland

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. These devices must first accurately measure power before they can manage it, but precision power measurement solutions often require multiple ICs or power configurations to measure different rails. To address this, Microchip Technology Inc. has introduced new two- and three-channel power monitoring devices that measure from 0V to 32V on a single chip. The two-channel device has native 16-bit resolution, providing flexibility across a wide measurement range.

The PAC1932/33 devices include precisely what is needed to measure power on a single Integrated Circuit (IC), integrating 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. 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. 

As a two-channel device with 16-bit power measurement, 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.

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