SLVSE39B November 2017 – July 2018 DRV8304
UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
Refer to the PDF data sheet for device specific package drawings
The sense-amplifier gain and the sense-resistor value on the DRV8304 device are selected based on the target current range, VREF voltage supply, sense-resistor power rating, and operating temperature range. In bidirectional operation of the sense amplifier, the dynamic range at the output is approximately calculated as shown in Equation 15.
Use Equation 16 to calculate the approximate value of the selected sense resistor with VO calculated using Equation 15.
From Equation 15 and Equation 16, select a target gain setting based on the power rating of the target-sense resistor.