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ADP1046A 100Watt
Evaluation board
ORFET SETTINGS
The ADP1046A includes features such as hot swapping as well as protection against a reverse current from other PSUs
connected on the same bus with the use of active ORing (OrFET). This window sets the turn on condition of the OrFET
depending upon the voltage threshold across it as well as its turn off depending upon the reverse current flowing in the current
-
+
sense resistor CS2
- CS2
any interruption with sufficient protection.
The following waveforms display some of the features that can be changed using this window.
A.
Load OVP action on OrFET: Figure 51 shows the OrFET being disabled when a bus voltage is greater than the local
voltage. A DC power supply can be connected to the output terminals of the board (J4, J5). Care should be taken to
ensure that the output voltage is not beyond the voltage rating of the output capacitor (C7) and the absolute
maximum VCC rating of the SR driver (U1). Here the load OVP flag is used to protect the PSU by disabling the
OrFET. The body diode of the MOSFET (Q1) is reversed biased during this condition.
. This enables hot swapping and allows additional PSUs to be connected to the same bus without
Figure 50 - OrFET Settings window
Rev. 1.3 | Page 31 of 55
PRD1386
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