User`s guide

SMPS AC/DC Reference Design User’s Guide

4.1.4 System Connections

4.1.4.1 INPUT CONNECTIONS

The AC input connector (J16) is shown in Figure 4-4. The SMPS AC/DC Reference

Design has a transparent lid (not shown in pictures) with a 12V fan mounted on it. There

are three holes provided in the lid to fasten the connection screws on the AC input

connector (J16).

Ensure that the power chord is not connected to the Variac or programmable AC source

(or AC Mains). Connect the AC cord with terminal lugs to the AC input connector in the

configuration shown in Figure 4-4.

FIGURE 4-4: SMPS AC/DC REFERENCE DESIGN INPUT CONNECTIONS

This is the minimum connection required to power up the SMPS AC/DC Reference

Design. However, other connections are recommended for detailed testing and

evaluation of the system.

4.1.4.2 OUTPUT CONNECTIONS

Ensure that the SMPS AC/DC Reference Design is not powered. Connect DC

Electronic Loads (if available) to the 5V and 3.3V output terminals shown in Figure 4-5.

FIGURE 4-5: SMPS AC/DC REFERENCE DESIGN OUTPUT CONNECTIONS

A DC electronic load can be used to adjust the output power delivered by the SMPS

AC/DC Reference Design. If a DC electronic load is not available, a rheostat or

resistors with sufficient power ratings may also be used for loading the SMPS AC/DC

Reference Design.

Live

Earth

(No connection)

Neutral

+12V

GND

+3.3V

GND

+5V

GND