Other Parts Discussed in Thread: TINA-TI
Hi Sir,
I downloaded the "TPS40210 TINA-TI Load Transient Reference Design" for simulation :
https://www.ti.com/lit/tsc/slum615
At the beginning I didn't change anything and the simulation result was as expected, output voltage is around 24V
then I removed IG1 and change the load to a 1kOhm resistor, the result was still as expected
then I changed R7 from 51kOhm to 62kOhm, in order to get 0.7/1.5*(1.5+62) = 30V output voltage, but I got strange result as below, the "SW" signal was not switching at all
it may be caused by over-current protection was triggered, so I shorted the ISNS pin directly to ground and simulated again, the "SW" signal activated for about 500us then it stopped switching again
My short-term purpose is to get a higher voltage output(ex.30V), and would like to know what's wrong on the above simulation, thanks in advance.
