Datasheet

www.ti.com Test Procedure
Set the scope to trigger on Channel 1. Disconnect the current probe and reconnect it across the 12VIN1
supply lead. Move the probe ground lead to test point TP9. In the GUI 12A CONTROL panel, click on the
PASS FET button. In the STATUS panel, verify the 12A PASS FET, BLK FET, and OUT>PG Threshold
indicators turn GREEN. On the scope, verify a waveform was obtained similar to that shown in Figure 9 .
The Channel 1 and 4 waveform parameters should be similar to those indicated above for Figure 8 . Again,
the extent of variance of the 12-V supply setting from a nominal 12.0 V affects the ramp-up timing result. A
DVM can be used to verify the voltage at TP7 (with respect to ground at TP9) is essentially the same as
the input supply potential at 12VIN1.
Figure 9. Output Ramp-Up Waveforms — SLOTA_PWR Rail
On the EVM board, set the SLOT B ENABLE slide switch to the LO position. Use a DVM to verify the
output voltages at test points TP10 and TP11 (with respect to TP12) decay towards 0 volts. In the AMC B
STATUS panel, the 12B PASS FET, BLK FET, and 3.3B PASS/BLK FET indicators should display OFF,
with the indicator color changing to red. Both PG indicators (OUT>PG Threshold and VOUT GOOD)
should change to RED. On the EVM board, set the SLOT A ENABLE switch to the LO position. The output
voltages at test points TP7 and TP8 (with respect to TP9) should now also decay towards 0 volts. Also,
the AMC A STATUS FET indicators should display OFF (red background), and the two PG indicators also
turn RED.
Module operation as indicated in the above steps, along with obtaining the indicated GUI responses, is a
good indication of a fully functional board and correct set-up. This is also a good starting point for further
test and user evaluation of the device. Note that the four power channels must be reset by setting each of
the PASS FET CONTROL buttons to DISABLED (and returning the ENABLE switches to the HI position),
in order to enable subsequent power-up events.
SLUU318 – August 2008 15
TPS2359 Dual-Slot ATCA™ AdvancedMC™ Controller with I
2
C Evaluation Module
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