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Minimise precharge phase region for bq24650

Posted: 02 Dec 2011     Print Version  Bookmark and Share

Keywords:precharge phase  fast-charge  current regulation  voltage regulation 

In this application report, Texas Texas Instruments' bq24650 battery charger operates in three phases: precharge phase, fast-charge current regulation, and fast-charge voltage regulation. In many applications, a long precharge region is not required when using bq24650 as a charger. Thus, the following application note describes a method of reducing the precharge region for this charger. In this method, a circuit is designed to force the voltage of the feed back pin above the lower threshold for fast charge. This keeps the charger in fast-charge mode regardless of the battery voltage.

View the PDF document for more information.

Originally published by Texas Instruments at as "Reducing Precharge Phase Region for bq24650".

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