vicorpower.com

Applications Engineering: 800 735.6200

Rev 1.2

Page 4

The load should be connected to +OUT and –OUT terminals of the evaluation board

with short leads of suitable gauge to carry the output current and minimize losses.

A sufficient number of terminal connections should be used to ensure that no

terminal sees more than its maximum rated current. The evaluation board can be

connected directly to the application for which the module is intended. However

the interconnect impedances between the evaluation board and the application

can greatly affect the transient response. For applications where transient response

is critical, the user should consider mounting the VI BRICK AC Front End module

directly to the target application PCB. Test points TP12 (–OUT) and TP07 (+OUT) can

be used to monitor the output and are located on the PCB adjacent to the output

terminals of the AC Front End module.

Earth Connections

There are several earth connections available on the board. Earth must be connected

via a low impedance connection in order for the internal line filter to function. These

earth connections also provide a safety ground for the baseplate of the module.

Earth may optionally be connected to either of the VI BRICK AC Front End outputs in

order to provide a positive or negative voltage rail with respect to earth.

Output Voltage Measurement Jack (J12)

This connector is provided to make accurate measurements of the output ripple

voltage of the VI BRICK AC Front End. Many types of scope probes may be directly

connected to this point if the probe is equipped with a removable plastic sheath.

To avoid creating ground loops when making measurements of the output or input

voltage, these measurements should be made separately.

Figure 2

VI BRICK AC Front End

Output capacitor (C29) can be

added to reduce switching frequency

voltage ripple at the probe.

(Click on drawing to view larger.)