Mxc 270 48V To 12V Output Tl Evb - HELIX MxC 200 Manual

MxC™ 200 TL EVB Manual

4. MxC 270 48V to 12V Output TL EVB

The MxC 270C-EB-1 48V to 12V Output TL (Transformer less Isolation) EVB is a standalone
isolated Divide-By-4 voltage reducer (Figure 2). The EVB is configured for 10W operation. A 4W
configuration is provided (see Figure 4) using cheaper, smaller components.
Isolation is provided via the isolation barrier capacitors. Different types of capacitors are to be
used depending on the required equipment safety classification. The 1.5KV capacitors used for
10W operation are not Y1/Y2 safety rated. Safety rated film capacitors can be substituted as
required. The 4W TL EVB configuration references Y2 safety rated MLCC capacitors.
The MxC 270 48V to 12V Output TL EVB provides the highest power density for an isolated 12V
output configuration. Additionally, a low-profile module can be manufactured using all SMD
components.
Figure 1: MxC 270 48V to 12V Output TL EVB Block Diagram
Figure 2: MxC 270 48V to 12V Output TL EVB Standalone Wiring Diagram
11.5.18
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