PRM48BF480T500A00 Datasheet, PDF (41/45 Pages) Vicor Corporation – PRM™ Regulator

Input Fuse Recommendations
A fuse should be incorporated at the input to each PRM, in
series with the +IN pin. A 20A or smaller input fuse (Littlefuse^®
NANO^2® 456 series) is required to safety agency conditions of
acceptability. Always ascertain and observe the safety,
regulatory, or other agency specifications that apply to your
specific application.
Thermal Considerations
V•Ichip^TM products are multi-chip modules whose temperature
distribution varies greatly for each part number as well as with
the input / output conditions, thermal management and
environmental conditions. Maintaining the top of the
PRM48B[x]480[y]500A00 case to less than 100ºC will keep all
junctions within the V•I Chip module below 125ºC for most
applications. The percent of total heat dissipated through the
top surface versus through the J-lead is entirely dependent on
the particular mechanical and thermal environment. The heat
dissipated through the top surface is typically 60%. The heat
dissipated through the J-lead onto the PCB board surface is
typically 40%. Use 100% top surface dissipation when
designing for a conservative cooling solution.
It is not recommended to use a V•I Chip module for an
extended period of time at full load without proper
heat sinking.
PRM48B x 480 y 500A00
- 41 -
Rev. 1.0
11/2012