Datasheet

ADP1048-600-EVALZ PRD 1363
Rev. 1.3 | Page 9 of 26
9) Connect a resistive or electronic load to the output connections of Vout+ and Vout-. Note that the load should be
connected before the input power is supplied to the evaluation board for safety concerns.
10) Connect a 50 or 60 Hz ac power source, which has to be turned off, to ac plug J1 or terminals J9 and J10.
11) Turn on AC power source and increase the input voltage within the range from 85Vrms to 265Vrms.
12) The evaluation board should now up and running, and ready for evaluation. The output should now read about 385 VDC.
13) 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 single user friendly window.
Figure 9 - Monitor window in GUI
During power up, the ADP1048 is connected to the USB port (5V) and the LDO powers the IC. It takes 20µsec for VCORE (pin
26) to reach an internal voltage of 2.5V. After this, the I.C. downloads the contents of the registers into the EEPROM. After this
the softstart ramp begins.
After successful startup and in steady state condition, 5 LEDs on the board to provide to the user the status of the board. All
the LEDs will be turned ON indicating that there are no faults detected such as over voltage or over current. In case of a fault
the PGOOD or AC_OK 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.
LED Location Description
D7 Bottom left Inrush signal
D8 Bottom right PGOOD signal (active high)
D9 Bottom right AC_OK signal (active high)
D10 Bottom right Indicates input voltage is present
D11 Top right Indicates 12V or USB5V is
present
Table 4 – List of LEDs on the evaluation board