The BQ24747RHDR is a multi-chemistry battery charger IC from Texas Instruments, designed for 2 to 4 series cells with a maximum battery pack voltage of 19.2V. Its headline rating is the 8.064A programmable charge current, which sets the external MOSFET and inductor sizing for the buck converter stage. The constant-current, constant-voltage profile is configured over the I²C interface, so the host MCU must have an available I²C port and firmware to handle the SMBus-like protocol.
Obsolete — plan your BOM around surplus or last-time-buy stock
Texas Instruments lists the BQ24747RHDR as Obsolete. For new designs, look at current-generation SMBus/I²C chargers in the BQ247xx family — but the pinout and register map will differ. Confirm date code and moisture sensitivity before using a reel.
Package and mounting — 28-VQFN with exposed pad
The BQ24747RHDR comes in a 28-VFQFN Exposed Pad package, supplier device package 28-VQFN (5x5). Mounting is surface mount, supplied in Tape & Reel.
Temperature grade and fault protection
The IC includes over-voltage fault protection on the battery and input rails. Supply voltage maximum is 24V, so a 2-cell to 4-cell pack stays within the input range.