TPS51518

Hi David,

 There is a Ref Design on the TPS51518 Product Folder page, but not 50A.  And there are plenty of PMPxxx Ref Designs that will handle 50A, but we need to know VIN, VOUT, and any other system parameters before we can find a design.  How many of these 50A supplies are going to be built?

-Leonard

Leonard,

The 50A design shown in the product page is not for the 51518. The volumes are modest. I would say 1500 pieces per year. The input voltage is 12V and the output will be between reference and 2V maximum. This is for a diode application.

-David

Strange ..  . the link for the design takes you to this page: http://www.ti.com/tool/pmp7170.3 with the title: Non-Isolated Buck for Consumer Electronics using TPS51518 w/ input of 12 VDC 1.05V@9.02A  PMP7170.3, but the links on the page are for the TPS54xxx design, I guess the original PMP7170, not the updated PMP7170.3.

I'll have to find the designer to get the files.

-Leonard

For this type of application with a very low duty cycle and high current, a multiphase solution should be considered.
TPS51727 is a Dual Phase controller, D-CAP+, with internal mosfet drivers intended for 50A+ applications.
http://www.ti.com/product/tps51727

The EVM SLUU379 produces Vout 0.875 to 1.5V at 40Amps from 12Vin.

Dual phase offers:
1. lower ripple currents on input and output
2. easier to source components, each phase is 1/2 the load
3. better thermal management, heat is spread out
4. higher efficiency

TPS53624 is another possibility.
http://www.ti.com/product/tps53624

Nancy,

Is there an evaluation board for the TPS53624?

-David

Hi Ed,

I would like to get my hands on 127 board. Can you help with this?

-David 

You can order online: http://www.ti.com/tool/tps51727evm , but it will only give you 1.25V, 40A.

David,

  What about the TPS53355?  There is an EVM that provides 30A, and has D-CAP mode: http://www.ti.com/tool/tps53355evm-743 .

-Leonard

Leonard,

I like the suggestion except the maximum current is 30A. We need 50A. At least with the 127, I can modify my switch for higher current plus it is dual phase.

-David

Leonard,

Is there a TINA-TI simulation model available for the TPS51518? There doesn't seem a direct way to convert the PSPICE model into TI? 

-David

Looks like there is only a pspice model available.