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ADP1046A 100Watt
Evaluation board
Figure 38 - Latching VS1 FAST Over Voltage Protection
Green trace: Output voltage
Red trace: OUTA
Figure 40 – Load OVP, action set to disable all PWMs except OUTAUX, PSU keeps re-enabling PWMs when OVP condition gets cleared
Additional things to try:
1.
Using Auto Trim to precisely set the voltage at the terminals of the board.
2.
Setting different fast and accurate OVP limits.
3.
Regulating with VS3 at all times and evaluating the transient response.
4.
Raise the bus voltage higher than the nominal value and see the OrFET turn off.
5.
Use this voltage continuity feature to detect a voltage drop more than 100mV between VS1 and VS2 or VS2 and
VS3.
Figure 39 - Hysteretic VS3 Over Voltage Protection (set to 14V)
Upper trace: Output Voltage,
Blue trace: OUTA
Red trace: OUTAUX
Rev. 1.3 | Page 26 of 55
Green trace: Output voltage, 5V/div
PRD1386
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