Tool/software: TINA-TI or Spice Models
Sir,
Hi Akshay,
I would recommend to also add a Schottky diode at the output. We recommend all designs with a hot swap controller to have a TVS diode on the input and a schottky diode at the output (for short circuits and overcurrent shutdown). All wires have trace inductance and in the event of a hot short (short circuit) or severe overcurrent (fault timer), those wires could produce a huge change in voltage at the input and output. I recommend the B380-13-F schottky diode, and make sure the TVS diode clamps the voltage lower than the abs max of the device at the worst case clamping current.
The value of the output cap is dependent on your application. Maybe a 150uF cap should be suffice.
Also, the easiest way to design with our hotswap controllers is to use our calculator tool. This will help review and troubleshoot your design, and would greatly speed up the back-forth communication of questions we would have for information needed for the review (such as total output cap including anything connected downstream from the output node, which may not be shown on a partial schematic).
You can find it by going to www.ti.com/hotswap ==> click on “Tools & software” ==> then click on “Hot Swap design calculator tools”
For help on filling out the cells on the excel spreadsheet, we have video tutorials on how to fill out the hotswap design calculator spreadsheet. They explain cell by cell what each one means and how to enter the correct value. The videos are at www.ti.com/hotswap ==> Click on “Support & Training” tab.
If you would like a detailed explanation on all of the equations and methodologies behind the calculator tool, please go to our app note at www.ti.com/hotswap ==> Click on “Technical Documents” ==> Click on “Robust Hot Swap”. It goes step by step to explain what the SOA/PLIM means and how it’s calculated.
Best Regards,
Aramis P. Alvarez
