FunctionProtectionNumber of series cells (Min)2Number of series cells (Max)4Communication interfaceNo CommunicationFeatures2-series protection, 3-series protection, 4-series protection, Over-voltage (OV), External delay capacitorTypical operating current (Typ) (uA)1RatingCatalogVin (Max) (V)20open-in-newFind other Battery protectors
The bq2947 family is an overvoltage monitor and protector for Li-Ion battery pack systems. Each cell is monitored independently for an overvoltage condition.
In the bq2947 device, an external delay timer is initiated upon detection of an overvoltage condition on any cell. Upon expiration of the delay timer, the output is triggered into its active state (either high or low, depending on the configuration). The external delay timer feature also includes the ability to detect an open or shorted delay capacitor on the CD pin, which will similarly trigger the output driver in an overvoltage condition.
For quicker production-line testing, the bq2947 device provides a Customer Test Mode with reduced delay time.
TIDA-00553 — The Texas Instruments bq40z60 device is a Battery Pack Manager that integrates battery charging control output, gas gauging, and protection for completely autonomous operation of 2-series to 4-series cell Li-Ion and Li-Polymer battery packs. The architecture enables internal communication between (...)