02 Jan 2013

Maxim Fuel Gauge Reduces Quiescent Current

Maxim has started to sample their MAX17048. This is a simple to use fuel gauge for Lithium-ion (Li+) batteries.

One of the key advantages of the new fuel gauge is that it maximises battery lifetime and has an operating current of only 23µamps. This means that the battery power is focussed on the equipment it is meant to be powering rather than being used on the management systems required.

The power can be even further reduced when it enters its micropower hibernate mode, in which the fuel gauge continues to operate.

The MAX17048 requires a minimum of external components. Only a single capacitor is required rather than multiple components previously required. This not only reduces costs because of the reduced bill of materials, but also enables the chip to reduce the board size. In fact the circuit typically reduces the board area by a factor of three when compared to other solutions

The MAX17048 fuel gauge is aimed at portable battery-powered applications where size, cost, and power are critical. Typical applications include as smartphones, wireless handsets, and mobile accessories, including Bluetooth headsets, portable speakers, fitness devices, and Wi-Fi routers.

Traditional fuel gauge designs require multiple external components including current-sense resistors, which increase both bill of materials (BOM) cost and design complexity. Those fuel gauges also use coulomb counting, which can drift and affect the accuracy of the gauge over time. The MAX17048 features the proven ModelGauge algorithm and does not require coulomb counting to report accurate battery state-of-charge, thus extending runtime. The MAX17048 functionality is also integrated into the company’s TINI Power System-on-Chip (SoC) to make it easier to upgrade designs to more complex systems.

“Although fuel gauges have traditionally been found in notebook computer applications, they are increasingly appearing as a critical ‘must-have’ element in consumer devices. With a highly accurate fuel gauge, customers know how much battery is left in their mobile device and that gives them confidence in the product,” said Susie Inouye, Principal Analyst of Databeans.

Most popular news in Power management

IGBTs for photovoltaics, industrial motors and more
Murata delivers 1300W front-end AC-DC power supply
Infineon syndicates billion dollar IR loan
Digitally enhanced power analogue controllers
Higher efficiencies for Qi wireless charging pads

All news in this channel | All news


Want more like this? Register for our newsletter









Whitepapers
Redefining LTE for IoT
ARM and NextG explain how LTE with its high data rates, complexity and capacity can be used to provide effective communications for IoT with its lower complexity and data rate requirements.

More whitepapers

Training
Fundamentals of RF and Microwave Measurements (RF2-1114)
Learn all the key issues and techniques of RF and microwave measurements on this two day course.

More training courses

From Machine to Machine to the Internet of Things
From Machine to Machine to the Internet of Things

Vlasios Tsiatsis, Ioannis Fikouras, Stefan Avesand, Stamatis Karnouskos, Catherine Mulligan, David Boyle, Jan Holler
Machine to machine communications is set to grow at a very fast rate. New...
Read more . .

USA bookstore UK bookstore









Radio-Electronics.com is operated and owned by Adrio Communications Ltd and edited by Ian Poole. All information is © Adrio Communications Ltd and may not be copied except for individual personal use. This includes copying material in whatever form into website pages. While every effort is made to ensure the accuracy of the information on Radio-Electronics.com, no liability is accepted for any consequences of using it. This site uses cookies. By using this site, these terms including the use of cookies are accepted. More explanation can be found in our Privacy Policy