Power monitoring IC measures from 0 V to 32 V on a single chip

By Warren
Miller, contributing writer

Technology, Inc. recently announced the development of two new power monitoring
devices that are designed to measure power in low-voltage, high-power
applications such as graphics processing units, field-programmable gate arrays
and embedded computer systems.  The PAC1932/33 devices, featuring two- and three-channels, respectively, each
measure and manage power from 0 V to 32 V on a single integrated circuit.

The PAC1932
is the first two-channel power monitoring device that provides native 16-bit
resolution, according to the company.  With
the ability to measure power consumption for up to 17 minutes without host
intervention, the PAC1932 allows designers to extract accurate measurements
without having to adjust voltage or current range. The two integrated
analog-to-digital converters measure current and power simultaneously, offering
engineers the opportunity to more efficiently utilize power in their designs.

By utilizing
a single integrated circuit to take precise power measurements, both devices remove
the need for separate components to measure different rails, which also reduce
system costs and reduce the bill of materials. 
Each device measures voltage rails on a range of 0 to 32 V, effectively
eliminating the need to reconfigure measurement resolution between low- and
high-current load events.  The PAC1932/33
devices are well configured for a wide variety of applications, ranging from
point-of-sale systems and ATMs to computing and building automation.



systems have become more and more power hungry as computing, communications and
graphics processing requirements have expanded. The ability to manage power in
these systems can reduce energy costs and improve reliability and also allow
systems to offer a level of processing flexibility not previously available. By
adjusting power levels based on application requirements, the overall system
can respond more efficiently – using power when it is most effective at
boosting processing or communications throughput.

“As applications continue to seek ways
to reduce power consumption, precision DC power measurement has grown as a key
element for energy savings,” according to Bryan Liddiard, vice president of
Microchip’s Mixed Signal and Linear Division. “Just as the four-channel PAC1934
improved power measurement for Windows 10 devices, the new two- and
three-channel power monitoring ICs offer improved power measurement for
low-voltage, high-power applications in markets such as embedded computing and

Both the
PAC1932 and PAC1933 are available for sampling and are in volume production.
Pricing starts $0.78 each and $0.94 each for the PAC1932 and PAC1933,
respectively, both in quantities of 10,000. Products can be purchased via microchipDIRECT or one of Microchip’s
authorized distribution partners.