LM5069: About Vin cap value

Hi Team,

The input current is around 10A when the Customer uses 0.1uF as Vin cap. Do you have a suggestion? thanks 

Hi,

10A will not flow through LM5069 as it is input cap charging current. 

Are you sure it is only 0.1uF? It looks there is more cap. 

Regards 

Kunal Goel

Hi team,

Customer use the 0.1uF and 0.01uF of Vin cap to test and use hot plug of the way to test.

The test result will cause some Voltage spike and charge current to Vin cap.

Do you have some suggestions to improve the spike and current? 

Seems 0.01uF of Vin cap test result is better. but you suggest min cap is 0.1uF.  

Vin cap 0.1uF result

spike V=103V 

Charge current 30A

Vin cap 0.01uF result

 spike V=94V

Charge current= 2.8A

Hi Jimmy,

Is this result repeatable? 

If yes then they can use 0.01uF. They can use TVS diode to further lower peak.

Regards

Kunal Goel