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Operate fuel gauge and charger without host controller

Posted: 17 Nov 2011 ?? ?Print Version ?Bookmark and Share

Keywords:battery charging system? regulator? wake-up current?

Texas Instruments' bq24707/26/25 chargers and the bq20z7x/8x/9x gas gauges are both SBS-compliant integrated circuits. In this application report, both of these chargers and gas gauges are used together as a nonhost-control, battery charging system. An external regulator, TPS7A49xx, is added to the system to prevent shutting down the system during a deeply discharged state of the battery cells. It provides a wake-up current to charge the discharged battery cells and power up the system. This document describes the system in detail and provides the test results.

View the PDF document for more information.

Originally published by Texas Instruments at as "How to Operate bq20z7x/8x/9x Fuel Gauge and bq24707/25/26 Charger Without Host Controller".

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