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TIDA-010054: : need information on parts and design

Part Number: TIDA-010054
Other Parts Discussed in Thread: ISO7721

Hi,

Want is the use of  "2220Y1K00474KETWS2" in the design of TIDA-010054? Because there is 14 of those 0.47uF capacitor in the design and they are very expensive en digikey right now (15$/unit).

So i want to know the use of those capacitor, because i have seen other DAB without it.

Also on page 49, i dont understand the meening of this note:

With the current hardware, the following changes are necessary to run the lab experiments:

1. Remove the resistor R13 and short pin 13 to pin 14 on device U1

2. Remove the resistor R30 and short pin 13 to pin 14 on device U2

3. Replace capacitors C57 and C141 with lower value capacitors between 2.2 nF and 4.7 nF to increase the bandwidth

4. Add a 330-pF parallel capacitor on R68 and R80 to reduce the noise

5. Change R22 to 6.5 kΩ on the HV sense card for secondary DC voltage sensing

6. The short-circuit detection and two-level turn-off function on the gate driver card is not currently supported . To avoid false alarms, unpopulate ISO7721. 7. The close loop bandwidth was tested with 220-µF DC link capacitors on the secondary side

Should i make these change to make the design work? Or should i stay with the original design?

Thanks for your help and sorry if my english is note perfect.

Vincent