Texas Instruments TPS2663-166EVM, User Manual, Page: 8 / 17

Test Procedure and Results
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8 SLVUBQ5A – August 2019 – Revised October 2019
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TPS2663-166EVM: Evaluation Module for TPS2663xPWP and
TPS1663xPWP
6 Test Procedure and Results
6.1 Hot-plug and Start-up With 4.8 Ω Load
Use the following instructions to measure the output slew rate and input inrush current during start-up.
• Set the input supply voltage V
IN
to 24 V and a current limit of 10 A. Enable the power supply.
• Connect a load of 4.8 Ω at output connector T2 for testing CH1 and T4 for testing CH2.
• Hot-plug the power supply at input connector T1 for testing CH1 and T3 for testing CH2.
• Observe the waveform at V
IN
, V
OUT
, FLT, and I
IN
with an oscilloscope to measure the output slew rate
and rise time. The device starts with inrush current of 0.5 A and the output voltage reaches V
IN
in 50
ms.
Figure 3 and Figure 4 show examples of inrush current during start-up on the TPS2663-166EVM.
Figure 3. TPS2663-166EVM Startup for CH1 (V
IN
= 24 V,
I
LIM
= 6 A, R
OUT
= 4.8 Ω , MODE = GND)
Figure 4. TPS2663-166EVM Startup for CH2 (V
IN
= 24 V,
I
LIM
= 6 A, R
OUT
= 4.8 Ω , MODE = GND)