Device Overview
Texas Instruments BQ25798RQMR is a battery-management IC for high-current charging applications. The exact RQM variant uses a 29-pin 4 x 4 mm VQFN-HR package and is specified for -40 to +85 degC operation.
Selection-Critical Data
| Parameter | Confirmed Data | Engineering Relevance |
|---|---|---|
| Maximum charge current | 5 A | Must cover the required battery charging current with appropriate thermal margin. |
| Input voltage | 3.6 to 24 V | Must match the available adapter or system input range. |
| Battery charge voltage range | 3 to 18.8 V | Defines the supported battery-stack charge-voltage setting range. |
| Control interface | I2C | Must match the host controller and firmware interface. |
| Operating temperature | -40 to +85 degC | Defines the qualified environmental range. |
| Package | 29-pin 4 x 4 mm VQFN-HR | Defines footprint and thermal/mechanical integration. |
