DRV8812: Could you please review the schematic design and make some suggestions?

Hi Xiaofu,

Here is my feedback:

1. Increase the voltage rating of C323 to 40V or higher.
2. The recommended V3P3OUT capacitor is 0.47µF. Your schematic shows 1µF.
3. Add a 1MΩ resistor in parallel with the VCP capacitor (C316). 
4. I would recommend adding two 0Ω placeholder resistors on the DECAY pin to GND and VDD3.3V at least on the initial prototype boards. In case you experience issues with Mixed decay or wish to change the DECAY mode, the placeholder resistors will help. 
5. The absolute maximum voltage on the ISENx pins is 0.8V. With a 1Ω resistor, the maximum current will be 0.8A. If the desired output current is higher than 0.8A, the ISEN resistors (R319 & R329) should be decreased.
6. As a final note, I recommend checking that the voltage rating of all of the capacitors agree with the recommended values in the datasheet.

I hope this information is helpful.

Regards,

Pablo Armet