Global Sources
EE Times-Asia
Stay in touch with EE Times Asia
EE Times-Asia > Power/Alternative Energy
Power/Alternative Energy??

Using the DS2786 battery fuel gauge in a 2-cell battery pack

Posted: 11 Sep 2007 ?? ?Print Version ?Bookmark and Share

Keywords:open circuit voltage? fuel-gauge? battery pack?

The DS2786 stand-alone open-circuit-voltage (OCV)-based fuel gauge estimates available capacity for Li-ion and polymer batteries based on the cell voltage in an open-circuit state following a relaxation period. The OCV is used to determine relative cell capacity based on a lookup table stored in the IC. This capability makes accurate capacity information available immediately after a battery pack is inserted.

While the DS2786's operating range is designed for use with a single-cell Li+ battery pack, it can also be used in a 2-cell battery pack with the addition of a few components. This application note details a circuit that only requires two additional ICs to utilize the DS2786 in a 2-cell battery pack. This circuit allows the use of all the DS2786's features, including on-chip voltage, current, and temperature measurement; two auxiliary voltage inputs; and a two-wire interface.

Please view the PDF document for more information.

Article Comments - Using the DS2786 battery fuel gauge ...
*? You can enter [0] more charecters.
*Verify code:


Visit Asia Webinars to learn about the latest in technology and get practical design tips.

Back to Top