The latest version of DCP405, a single output power module, is more or less finished and ready for planned forthcoming crowdfunding. It includes a few modifications (thanks to my friend Macola) from the previous revisions that were used the same design as the power module from the EEZ H24005 project. First, how it looks like:

Here is the list of changes:

• The main change is that N-channel MOSFET as pass element in the post-regulator section is replaced with 2 x PNP BJTs (D45H11).
• Changing of pass element driver section also asked for different type of down-programming. Therefore that circuit is completely redesigned.
• The CV/CC mode of operation detection is now much simpler.
• The bias power supply that was use not so efficient combination of linear step-down regulator (TL783) and LTC3260 capacitive switcher is replaced with low power buck (TPS54060) that is using coupled inductor to generate positive and negative voltage.
• The good thing about replacing MOSFET (that is in TO247 package) and TL783 is that now I can use "off-the-shelf" L-profile heatsink, that will greatly simplify assembling, and no custom heatsink is needed anymore.
• More precise (and still very cost attractive!) MC33272ADR2G op-amps are used instead of TL072. The CV loop compensation network is also cleaned up and adjusted to work properly with new op-amps.

Schematics of the post-regulator is shown below (mentioned new bias supply and CV/CC detection is not shown), and complete design is available on the GitHub as usual.

LTspice simulation of the new post-regulator is also available on the GitHub, but it is also attached to this project. Please note that it assume that input voltage is fixed, not regulated by pre-regulator circuit.

I've made some measurements for the DCP405 module that can be found on: https://www.envox.hr/eez/eez-bench-box-3/eez-bb3-measurements/dcp405-power-module.html