The Texas Instruments DRV10963JJDSNT is a fully integrated driver that combines control logic and a power stage in a single 10-SON 3x3mm package. It is designed specifically for three-phase brushless DC (BLDC) fan motors, with a PWM interface for speed control. The integrated Power MOSFETs eliminate the need for external FETs, saving board space in compact fan assemblies. The three half-bridge outputs drive the BLDC motor phases directly.
The 500mA output is the continuous per-phase current limit. For a typical 5V BLDC fan, this gives headroom.