digital control of simpler, lower power supplies ref designs

I appreciate the raw power with flexible interface that the ADI Digital Power suite offers - but I am curious about simpler designs in compact form factor with tight control, monitoring, and the like.

Some examples of the supplies we're exploring with various ICs -

Universal line in - 5V 20A out (4x 5A rails or 1 20A, either is ok, prefer 4x)

Universal line in - 26V 3a out via LDO, 5V .5A, 3.3V .5A for precision reference platform (compact)

DC to DC  12 to 19.5 in 16.5V out, 5V .5A, 3.3V .5A

DC to DC 32V to 26V 3a out - 26V 3a out via LDO, 5V .5A, 3.3V .5A for precision reference platform (compact , alternate)

This one is a bit larger:  Universal line , PFC, 3 fully isolated out, programmable 0-32V 0-5A, 5V 3A, 12V 3A for  precision test and build lab

We like digital power for its flexibility in respoding to adverse conditions as well as its reduced part count and board size - some of these supplies will encounter very capacitive loads and be subject to short, or may generate a lot of heat, and we want them to regulate into that fault and fail with grace. 

Thanks for any pointers you may have .

NS

  • Hi,

    Thanks for your interest in the digital power parts. For simpler and low part count designs we offer the ADP1050 which has a 24 pin count but still offers enough flexibility for several topologies like forward, active clamp, and even half bridge. I'm assuming that universal line applications do require isolation even the ones without PFC. You can have a bridge rectifier into a large bulk cap followed by the DC-DC stage of your choice either active clamp forward or half bridge based on your preference as the power level is ~100W.

    For the requirement with PFC, the output is ~211W so I suggest using the AD1047 and followed by one DC-DC stage of 32V and then deriving the 12V and 5V rails from this main 32V rail. This way you can have only one transformer instead of three.

    There are several reference designs available on the web on ADP1046A, ADP1051, and ADP1055 (for DC-DC) and ADP1047 (for AC-DC PFC) webpages that you can refer to.

    HTH.

    Lt. Comm Data.