Analog Devices ADP1046A User Manual page 9

ADP1046A 100Watt
Evaluation board
6. The IC on the evaluation board comes preprogrammed and this step is optional. The original register configuration is
stored in the ADP1046A_100KHz_Hard_switching.46r register file. Note: All register files have an extension of .46r. The file
can be loaded using the second icon from the left in Figure 9.
7. Connect a DC power source (48VDC nominal, current limit to 5A) and an electronic load at the output set to 8A.
8. Connect a voltmeter on the output (connectors J4 and J5) and a differential scope probes (optional) between test points
TP16 and TP17. Ensure that the differential probes are used and the ground of the probes are isolated if measurements are
made on the primary and secondary side of the transformer simultaneously).
9. Turn the PS_ON switch (SW1 on schematic) to the ON position.
10. The evaluation board should now up and running, and ready for evaluation. The output should now read 12VDC.
11. Click on the 'Monitor' tab and then on the 'Flags and Readings' icon. This window provides a snapshot of the entire state of
the PSU in a user friendly window.
During power up, the ADP1046A is connected to the USB port (5V) and the LDO powers the IC. It takes 20µs for VCORE (pin
26) to reach an internal voltage of 2.5V. After this, the IC downloads the contents of the registers into the EEPROM.
After successful startup and in steady state condition, 5 LEDs on the board provide the status of the board. All except the D12
(or FLAGIN) LED will be turned ON indicating that there are no faults detected such as over voltage or over current. In case of
a fault the POOD1 or PGOOD2 LEDs will be turned OFF indicating that some flag has tripped due to an out of bounds
condition. The monitor window will display the appropriate state of the PSU.
Figure 9 - Different icons on dashboard for loading and saving .46r and .46b files
Figure 10 - Monitor window in GUI
Rev. 1.3 | Page 9 of 55
PRD1386