Hi,
Is it possible or make sense to try to get 150W output with TPS40210 boost topology from 12to24VDC input?
I calculated the needed inductor, capacitor etc. values as below:
| Fsw | 200 | kHz | ||
| Ct | 220 | pF | ||
| Rt | 378,4438 | kOhm | ||
| Vfd | 0,5 | |||
| Duty Min | 0,80083 | |||
| Duty Max | 0,900415 | |||
| Lmin | 4,91E-05 | H | 49,07735 | uH |
| ILrms | 11,44963 | A | ||
| ILpeak | 13,60457 | A | ||
| Cout > | 9,36E-05 | F | 93,64315 | uF |
| Cout ESR < | 0,035556 | Ohm | 35,55589 | mOhm |
| Cın > | 1,38E-05 | F | 13,76014 | uF |
| Cin ESR < | 0,045421 | Ohm | 45,42105 | mOhm |
| VFB | 0,7 | V | ||
| RFB | 221000 | Ohm | ||
| RBIAS | 1296,731 | Ohm |
I also tried 50kHz switching freq and matching values but I got same results.I could not be succedded with these calculations and Webench suggested FET-Diodes. I imported the BSC190N15NS3_L1 FET and DFLS12000 diode as macro. Schematic and simulation results are attached as "TPS40210 Booster - Calculated". What does it trying to tell when it drops?
TPS40210 Booster - Calculated.TSC
Then I searched on forum and used links below. Especially on forum page, Brit's generic models for FET and diodes gave results. But when I tried to configure for my needs, again it gave strange results again. Experimental simulation and results are attached as "TPS40210 Booster - Experimental".
TPS40210 Booster -Experimental.TSC
Something is wrong with them but what, I don't know. Maybe, the starting point is wrong.
Could anybody help please? I dont want to work with flyback design if it is possible due to the efficiency and dummy load needs. Boost solution would be very cheerful.
Thanks
