Can multiple Infineon POL modules be combined to increase load? i.e. current sharing, ganging, phase control?

[CDarrow]

For designs requiring more than 40A, can we combine multiple POLs to support higher loads? For example, if we want to provide 100A, can we combine three TDA38640, TDA38641, or TDA38740 to source 100A? Do these modules support some form of current sharing or communication between them to implement phase control? My customer does not want to use a controller and power stages. They want to minimize their component count and board space, and are looking at Point of Loads with SMBUS (I2C) based communication that support loads up to 100A.

Thank you, Chris

[Nishanth]

Hello @CDarrow,

Thank you for contributing to the Infineon community.

The major obstacle to using multiple POLs to support higher loads will be distributed current sharing.

There are no direct designs or evaluation boards available to ascertain the use of multiple POLs for higher loads.

However, as you mentioned the use of digital multi-phase controllers and Integrated power stages can be an option.

Can you please let us know the end application of this proposed design? This would help us to further evaluate and understand the requirement.

Regards,

Nishanth

[CDarrow]

Hello Nishanth,

The application is powering a Xilinx FPGA XCVU13P. Need to provide several rails, but the rail that would require more current than capable with one TDA38640 is 0.85V at 100A. Looking at Infineon's Xilinx Reference Designs - https://www.infineon.com/cms/en/product/promopages/xilinx-SoC-FPGA-power-reference-design/xilinx-zyn... - there isn't a solution for the XCVU13P.

Thank you,

Chris

[Nishanth · Accepted solution]

Hello @CDarrow,

There will be products in the future that can be added/stacked to generate higher current values.   However, TDA38640, TDA38641, and  TDA38740 cannot be combined to generate 100A.  They do not support the stacking function.

Kindly let me know if you have any further queries.

Regards,

Nishanth