> I don't know whether we'd argue this DC->AC is harder/easier than an ATX supply (AC->DC) The little box challenge was significantly harder, primarily due to

> I don't know whether we'd argue this DC->AC is harder/easier than an ATX supply (AC->DC) The little box challenge was significantly harder, primarily due to the ripple requirements on the DC side. This is not an issue in the same sense in the AC->DC case, because you don't have that problem there (you have other ripple considerations that might look similar, but are not (PFC and ripple on the output)). Usually you would require a lot of capacitance to solve the ripple issue for DC->AC and the winning team had a very interesting way of solving it without the use of very large capacitors.