Datasheet

SLUU172 − October 2003
11
Evaluation Modules for −48-V Hot Swap Controllers
3.2.2 Functional Test
1. Turn on the power supply. On the EVM, place the POWER switch in the ON position.
Verify the power good LED (D1) is OFF. Verify the DVM reading is 0 ±100 mV.
2. Place the ENABLE switch in the ON position. Verify the green power good LED turns on,
and the DVM now displays approximately the input supply voltage level. The scope should
have acquired a sweep similar to that shown in Figure 4.
The brief fault timing ramp which is shown in Figure 4 FLTTIME trace may or may not be
present, depending on the actual values of the timing parameters for the particular board
being used. If the load voltage ramps to full input potential during the initial reduced rate
ramp period, then fault timing does not initiate.
3. Place either the POWER or ENABLE switch (or both) in the OFF position to remove power
from the VOUT terminals.
EN
IRAMP
FLTTIME
VOUT−
Figure 4. Load Ramp-Up Waveforms