Texas Instruments TPS2663-166EVM, User Manual, Page: 10 / 17

Test Procedure and Results
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10 SLVUBQ5A – August 2019 – Revised October 2019
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TPS2663-166EVM: Evaluation Module for TPS2663xPWP and
TPS1663xPWP
6.3 Output Hot-Short Test
Use the following instructions to perform the output Hot-Short test:
• Set the input supply voltage V
IN
to 32 V and a current limit of 10 A and enable the power supply.
• Connect the power supply at input connector T1 for testing CH1 and T3 for testing CH2. Enable the
power supply output.
• Short the output of the device at output connector T2 for testing CH1 and T4 for testing CH2.
NOTE: With the output powered up, shorting the output can lead to sparking at the output terminals.
To minimize the sparking, uninstall capacitor C2 for CH1 and capacitor C9 for CH2.
Capacitors C2 and C9 were uninstalled for this test.
• Observe the waveforms of V
IN
, V
OUT
, and I
IN
using an oscilloscope.
Figure 7 and Figure 8 show examples of output hot short on the TPS2663-166EVM. The device turns-off
the internal MOSFET and disconnects the output from the input.
Figure 7. TPS2663-166EVM Output Hot Short for CH1 (V
IN
= 32 V, I
LIM
= 6 A, MODE = OPEN)
Figure 8. TPS2663-166EVM Output Hot Short for CH2 (V
IN
= 32 V, I
LIM
= 6 A, MODE = OPEN)