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EVM Assembly Drawing and Layout

8 EVM Assembly Drawing and Layout

Figure 15 through Figure 21 show the top-side and bottom-side component placement for the EVM, as

well as device pin numbers where necessary. A four-layer PCB was designed using the top and bottom

layers for signal traces and component placement along with an internal ground plane. The PCB

dimensions are 3.6 in × 2.7 in with a design goal of fitting all components within the industry standard half-

brick format, as outlined by the box dimensions 2.28 in × 2.20 in shown in Figure 16. All components are

standard OTS surface-mount components placed on the both sides of the PCB. The copper-etch for each

layer is also shown.

Figure 15. Top-Side Component Assembly

SLUU407A–June 2010–Revised May 2013 48-V to 3.3-V Forward Converter With Active-Clamp Reset Using the

UCC2891 Active-Clamp Current-Mode PWM Controller

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