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ADP1046A 100Watt
Evaluation board
OUTPUT VOLTAGE SETTINGS
This window sets all the parameters related to the output voltage, including trimming, overvoltage protection (OVP) and
undervoltage protection (UVP) protection. There are three points where the output voltage is sensed using the ADP1046A
namely, before the ORFET (local OVP), after the ORFET (also local OVP), and at the load (remote OVP). An over voltage
condition at the load is termed as remote OVP whereas at the other two locations is termed as local OVP.
The following waveforms display some of the features that can be changed using this window.
A.
Under Voltage Protection (UVP): Figure 36 and Figure 37 show latching and hysteretic UVP respectively.
This test can be conducted in a number of ways, the simplest of which would be to set the 'VS3 Output Voltage
Setting' under the programmed UVP threshold using the drop down menu in the GUI. Alternately, the duty cycle can
be clamped to a lower value than its required value. Under certain conditions even a shorted load or an internal short
(shorting the synchronous rectifiers) can cause a UVP condition. Hysteretic (enable after 1 sec) and latching (remain
disabled, only PS_ON can re-enable) are the programmed choices for the faults.
Figure 35 - Voltage Settings window
Rev. 1.3 | Page 24 of 55
PRD1386
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