The DRV8334 implements Bootstrap Undervoltage, GVDD Undervoltage, and Thermal Shutdown in case of overtemperature. See the DRV8334 data sheet for more information on DRV8334 fault support.

Status LEDs for the 3.3 V, PVDD, GVDD, and FAULT are included and shown below.

Figure 2-6 Status LEDs

The FAULT LED lights up if the EVM senses a fault and the same fault is reported in the SPI register. See the complete data sheet for fault response and corrective actions.

The Faults can be reset in the GUI software using the CLEAR FAULTS button. More details on the GUI can be found in Section 3.

Figure 2-7 On-Board PVDD Buck and 3.3V LDO

The EVM includes a buck regulator for reducing VMOTOR to 12 V in case PVDD regulation is required. The buck feeds into the 3.3V LDO, which powers the EVM 3.3V rail.

Jumper J6 connects VMOTOR/PVDD to the PVDD buck. Remove this jumper to power down the buck regulator.

Jumper J7 connects the PVDD buck output (12V) to the 3.3V LDO. Remove this jumper to power down the 3.3V rail.

GVDD is generated internally to the DRV8334 device and the options are explained in the complete data sheet.