SLOSE84B August 2022 – October 2023 DRV8452
PRODUCTION DATA
When operating with the SPI interface, the DRV8452 supports an internal 3.3V reference voltage. This internal reference can be enabled by writing 1b to the VREF_INT_EN bit. The voltage on the VREF pin will be ignored in that case, and the VREF pin can be left open or connected to ground.
The full-scale current and the holding current will be calculated as shown in Equation 14 and Equation 14 -
Using the internal 3.3V as reference will save BOM cost by eliminating the two resistors connected to the VREF pin.
Figure 7-11 shows current regulation with VREF_INT_EN = 1b and 5 A full-scale current.