Last post by zidor28 - April 07, 2019, 02:54:21 PM
Per Anders, here is what was at play. The DAC board was actually drawing more than 100mA. The choke was designed for this rating, which wasn't enough. Hence the choke saturated and behaved as a resistance. Installing a choke with higher current capacity has solved the issue. Thanks again for your support and for the regulator.
Last post by zidor28 - March 23, 2019, 02:00:36 PM
In my (limited, certainly) experience, choke rectification works well with a good amount of inductance (within current limits of the choke of course) and can handle lower values of capacitance. I've used this topology in a good number of projects (although never before in a 12V power supply). Let me try to increase capacitance and see how it goes.