WEBENCH® Tools/TPS56221: Power regulator efficiency mismatch

NIBIN S

Part Number: TPS56221
Other Parts Discussed in Thread: TPS54526, TPS53219

Tool/software: WEBENCH® Design Tools

Hi,

My requirement is a Power regulator with 20A (1V) output with 5V input.The regulator supplies power to the core of FPGA.

The device I came across is TPS56221DQPT which states high efficiency (86%) in data sheet but when I checked in WEBENCH the output current omes around 18A with lesser efficiency around 75%.

I need clarification on the same. If this device is not suitable for my application then please suggest devices with high efficiency (output current 20A also can be varied below 20A) which can suffice my requirement.

Thanks and Regards,

Nibin

over 8 years ago

0 JohnTucker over 8 years ago

TI__Guru**** 191445 points

I checked this in Webench, The efficiency for 5 V in and 1 V out is b3tween 87% and 91.4% over most of the load current range. TPS56221 should work well for your application.

0 NIBIN S over 8 years ago in reply to JohnTucker

Intellectual 550 points

Hi,

I tried in WEBENCH, but still I am unable to get such efficiency.

Can you please let me know where I am deviated. The below link shows the efficiency curve I am referring to.

https://webench.ti.com/webench5/power/webench5.cgi?base_pn=TPS54526&VinMin=11.0&VinMax=13.0&O1V=3.3&O1I=5.5&AppType=None&op_TA=30&lang_chosen=en_US&origin=ti_search&optfactor=3

Regards,

Nibin

0 JohnTucker over 8 years ago in reply to NIBIN S

TI__Guru**** 191445 points

That link took me to a "cannot create design". Here is the one I got.

0 NIBIN S over 8 years ago in reply to JohnTucker

Intellectual 550 points

Hi,

May I know the output current value selected.

I am still not getting the curve as per previous attachment.

Please let me know why I am not getting proper efficiency curve.

Thanks and Regards,

Nibin

0 NIBIN S over 8 years ago in reply to JohnTucker

Intellectual 550 points

Hi,

May I know which device will be better for my design.
TPS56221DQPT or TPS53219ARGTR

Please let me know ASAP.

Thanks and Regards,
Nibin

0 JohnTucker over 8 years ago in reply to NIBIN S

TI__Guru**** 191445 points

TPS53219 is Not Recommend for New Design (NRND). TPS56221 would be recommended in that case. You could input your requirements in Webench as there may be other solutions as well.

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WEBENCH® Tools/TPS56221: Power regulator efficiency mismatch