Description

The ATA6847/ATA6847L are Three-Phase Brushless Motor Gate Driver System Basis Chips (SBC) for brushless motor control, designed using advanced SOI technology. In combination with a microcontroller and six discrete power MOSFETs, the SBC forms a brushless DC motor control unit. The gate driver units (GDU) are controlled independently through six dedicated parallel inputs. Charge pumps for low and high-side gate drive allow duty cycle operations from 0% to 100%. In addition, the SBC provides 5V and 3.3V low dropout voltage regulators, current-sensing operational amplifiers, an integrated Back-EMF (BEMF in schematics) detection module and a window watchdog. The microcontroller controls the ATA6847/ATA6847L using an SPI interface.

The ATA6847 is available in a 40-pin VQFN package, including two operational amplifiers. The ATA6847L is available in a 48-pin VQFN package and integrates three operational amplifiers and a physical LIN bus interface.