TIDUF77 June 2024 MSPM0G1507
Figure 3-43 shows a 50C temperature rising for DRV7308 under 220VAC, 250W, 3480RPM (290Hz) and 25C ambient temperature. This temperature rising is 9C higher than test under 300VDC power source as shown in Section 3.4.3. The reason is if board is powered with AC source, ripple current increases temperature of C67, and C67 is very close to DRV7308 (<5mm) for this compact reference design board, so high temperature rising of C67 finally increases temperature of DRV7308, hence if board area is allowed, place electrolytic capacitor relatively far away from DRV7308.