TPSI3050-Q1: TIDA-050059 Specification Questions

Hi Cho SR,

Thank you for reaching out,

I was just wondering if this design would need immediate or delayed disconnect at 36A, because this reference design offers a solution for both?

1.)  Yes it is possible to limit the MOSFET current to 36A by configuring the TIDA-050059. On the design guide refer to section 2.3.1.1 for shutdown using the fixed threshold of 300mV, using this you would just have to select a shunt resistor that will give us 300mV, using equation 6 in the design guide (36A x Rsense = 300mV) this will give you an Rsense around 8mohm. Another way to get this shutdown is from section 2.3.1.2 of the design guide using the adjustable threshold, using this method you could pick the Rsense value you would want to use and then calculate the Rref value required by using equations 7 and 8 in the design guide.

2.) I would suggest possibly using multiple FETs in parallel instead of just using one 36A FET, When paralleling MOSFETS the current will be split equally due to their positive feedback with respect to resistance. In addition to that consider having a very good heat sink to ensure that the junction temperature is not above ratings.

3.) We do not have any current limit simulations for this system.

Let us know if this answered your thread. 

Sincerely 

Goran