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TI SWIFT™︎Power Module EVM Review: Part 4 Dynamically adjust the output voltage using external DAC

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Review Part 3: Dynamically adjust the output voltage using external DAC

 

This part of the review was done together with another community member

 

Aim: To dynamically adjust the Vout of the DC/DC converter by injecting small current in the feedback network via external DAC.

 

Setup: ZedBoard Zynq-7000 FPGA Development Board plugged in with the AMS101 plug in board using AD5065 DAC. The DAC output was fed to the VADJ pin via small RDAC resistance. The fpga control code is written in Xilinx Vivado and Xilinx SDK 2016.

 

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ZED Board with AMS 101 Board

 

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ZED Board in Action with the AMS 101 Board via Rdac

 

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System Block Diagram

 

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AD5065 DAC output via Rdac to Vadj Pin

 

AD5065 DAC Funtionality:

 

 

 

 

FPGA Code on GitHub

 

Results:

 

 

 

 

 

 

References:

How to Dynamically Adjust Power Module Output

ZedBoard Zynq-7000 ARM/FPGA SoC Development Board

Xilinx AMS101 Evaluation Card

Fully Accurate 16-Bit VOUT nanoDAC AD5065

Xilinx Vivado Design Suite Evaluation and WebPACK

 

TI SWIFTTm Power Module EVM Review: Part 2 Test Setup Description

TI SWIFTTm Power Module EVM Review: Part 3 Analog tests of the Power Module

TI SWIFTTmPower Module EVM Review:  Part 4 Dynamically adjust the output voltage using external DAC

Go Back To: Road Test Review of TPSM84A21 Power Module