The next part of my hardware design series "Interfacing the PSP TFT-LCD Module to a FPGA" is now available online. It was quite a time consuming and challenging part to write too and I am relieved that it is finished. I can now continue laying out the prototype PCB design itself. I hope to publish the next part in the series "Part 5 - The PCB Schematics and Layout" in about 3-4 weeks time.
An abstract of the "Part 4 - An Improved Backlight Circuit" is provided below:
In part 4 of the series on "Interfacing the PSP TFT LCD Module to a FPGA" an improved backlight circuit is presented by using the MC34063A multi-purpose regulator. In this article using the equations provided in the datasheet to calculate the values of the external components is demonstrated. The calculated passive component values and the MC34063A have then been simulated in PSPICE to confirm that the analytically derived results drive the device as expected. In the final part of the article an investigation is made into the optimum printed circuit board layout of the circuit to minimize ground rise and bounce. Full article.
