Isolated regulated dc-dc modules for high-rel is 7mm thick
Called DCM2322 ChiP, this is a lower-power variant of the Vicor DCM3623 series in a 22 x 23 x 7mm package.
Three input ranges are available: 43 – 154V, 14 – 72V or 9 – 50V, with power levels ranging from 35 to 120W (see below) and efficiencies up to 90.5% – minimum efficiency at full load, over line and temperature at nominal trim is 80.0% (9-50Vin 12Vout version)
“Vicor DCMs use high-frequency zero-voltage switching topology to achieve thermal and electrical performance,” according to the firm.
- 43 – 154V input
3.3V output at 40W
5V output at 60W
12V, 15V, 24V, 28V, 48V output at 120W
- 14 – 72V input
3.3V output at 35W
5V output at 50W
12V, 15V, 24V, 28V, 48V output at 100W
- 9 – 50V input
12V, 15V, 24V, 28V and 48V output at 60W
Careful thermal management is needed to get the best out of the modules.
Taking the 9-50Vin 12Vout version as an example “Based on the safe thermal operating area, the full rated power can be processed provided that the top, bottom, and leads are all held below 95°C,” said Vicor. “Safe thermal operating area curves highlight the benefits of dual sided thermal management, but also demonstrate the flexibility of the Vicor ChiP platform for customers who are limited to cooling only the top or the bottom surface. ”
The over-temperature sensor is located on the top side of the internal PCB structure, so for effective thermal fault protection, the case bottom temperature must be constrained by the
thermal solution such that it does not exceed the temperature of the case top.