1 Typical Application Circuit(s)

This typical application shows a two-shunt system configuration and a third shunt as a current limit sensor.

Figure 1-1. Typical Application Schematic: ATA6847L
  • RWAKE = 2,7kΩ
  • CWAKE = 100nF
  • RWAKE_VS = 10kΩ
  • CVDD1 = CVDD2 = 2.2µF
  • CVS = 10uF || 100nF
  • CVDH = 4.7uF || 100nF
  • CCP1 = 330nF
  • CCP2 = 220nF
  • CVG = CVCP = 3.3µF

The typical application shows a Back-EMF system configuration for a 6-step trapezoidal application and a shunt as a current limit sensor. The application circuit is also suited for a single-shunt FOC application, with the current limitation functionality of the single shunt and detection of wind milling via the Back-EMF sampler. The charge pump output (VCP) controls the reverse polarity protection N-channel MOSFET.

Figure 1-2. Typical Application Schematic: ATA6847
  • RWAKE = 2.7 kΩ
  • CWAKE = 100 nF
  • RWAKE_VS = 10 kΩ
  • CVDD1 = CVDD2 = 2.2 µF
  • CVS = 10 µF || 100 nF
  • CVDH = 4.7 µF || 100 nF
  • CCP1 = 330 nF
  • CCP2 = 220 nF
  • CVG = CVCP = 3.3 µF