Hi Frank,
TPS40131 cannot be configured to single-phae application. It is suggested to use TPS40303 (single phase controller) or TPS40322 (dual-output/two-phase controller).
Regards,
Na
e2e effcy comparison.xls Shinichi,
I do not see any problem with using the CSD16321 FET. Attached is a calculator that you may find useful.
Regards,
Mathew
Cliff,
The TPS40303, TPS40304 and TPS40305 controllers use the pull-down current from BP to SS/EN during the calibration time to sense the 267k resistor from BP to SS/EN to enable the frequency spread spectrum. At 3.0V input, this only sources 5uA…
akircan,
I understand your concern, however it is not necessary to select a 40A inductor.
1) Under heavy load, the sensing FET will heat up quickly, increasing its Rdson. The Rdson can increase upto 40%, providing a significant increase in…
Hi Christine,
BP is also 0V? If EN/SS is not 0V, what does its waveform look like?
Have you measured whether there is any suspicious short in the power circuit? FET, IC or other components? If the IC is broken, which pin is short? If FET is dead,…
Part Number: TPS40422 Tool/software: Hi expert,
Customer used TPS40422 for 12Vin to 0.88Vo/40A and use the calculation tool for compensation but find the phase/gain margin is not good.
Would you please advise how to adjust the stability?
TPS40KType…
Ramgopal,
Your assessment of the bulk decoupling required is correct. You must calculate the required amount and validate it. The Hardware Design Guide (SPRABI2) discusses this calculation.
This bulk capacitance will affect the control loop on the…
