Designed DRV8305-Q1 and AVDD failure happen..
Datasheet recommend 1uF output cap for AVDD, but customer used 4.7uF from previous design(DRV3245-Q1 circuit.)
Please, refer failure symptom and let me have feedback for below questions.
- AVDD cap, 1uF value is critical value? Must keep 1uF? Should not use like 4.7uF?
- Must keep 1uF, failure mechanism when use 4.7uF AVDD cap. Why failure happen?
- In DRV3245-Q1 design, SL used AVDD cap as 4.7uF as guide, any difference between 3245 and 8305 AVDD LDO?
- Any recommendation for power sequence? Not to hit failure mode?