SN6501: Transformer of SN6501

Hi Anand,

Thank you very much for your help.

Yes I did see the list in table 3, I prefer the 3.3-3.3, turns ration is 1:1.1, the part number is 760390011, however, I cannot find it in Wurth website, I only found 760390012/13/14, so I was thinking if I can use the 5V-5V, turns ration is 1:1.1, the part number is 760390012, could you please help to confirm this? 760390014 you proposed could be used as 3.3 to 3.3 according to table 3, but its turns ration is 1:1.3, I think it cannot be used for 3.3V to 3.3, instead, a 1:1.1 turns ration transformer should be used.  I am confused, could you please help to double confirm.

Hi Anand,

Thanks.

Two deeper questions:

1. Since customer would like to use another transformer vendor instead of Wurth, they wonder how to define the specific specifications for the transformer, such as the turns, the magntic flux density, the area, the wire radius, etc, do you have any knowledge to explain these?

2. There is some description about Core Magnetization and self-regulation through positive temperature coefficient of Rdson, the prolonged current flow through a FET gradually heats the transistor which leads to an increase in RDS-on. My question is when the load current is very low, say 5mA, it is possbile that the current is not enough to heat the FET to increase the Rdson enough, so the transformer goes into saturation?  Can SN6501 work in very light load application?

Thank you very much!