Review Part 3: Dynamically adjust the output voltage using external DAC
This part of the review was done together with another community member dhmarinov
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.
ZED Board with AMS 101 Board
ZED Board in Action with the AMS 101 Board via Rdac
System Block Diagram
AD5065 DAC output via Rdac to Vadj Pin
AD5065 DAC Funtionality:
FPGA Code on GitHub
Go Back To: Road Test Review of TPSM84A21 Power Module