Texas Instruments TPS2663-166EVM, Руководство пользователя, Страница: 9 / 17

www.ti.com
Test Procedure and Results
9 SLVUBQ5A – August 2019 – Revised October 2019
Submit Documentation Feedback
Copyright © 2019, Texas Instruments Incorporated
TPS2663-166EVM: Evaluation Module for TPS2663xPWP and
TPS1663xPWP
6.2 Current Limit Test
Use the following instructions to perform the current limit test:
• Set the input supply voltage V
IN
to 24 V and a current limit of 10 A and enable the power supply.
• Set the current limit to 4.5 A using jumper J4 for CH1 and jumper J9 for CH2.
• Connect the power supply at input connector T1 for testing CH1 and T3 for testing CH2. Enable the
power supply output.
• Connect a load of 4.5 Ω (120 W) at output connector T2 for testing CH1 and T4 for testing CH2.
• Observe the waveform at V
IN
, V
OUT
, FLT, and I
IN
with an oscilloscope.
• The device limits the current to 4.5 A for a maximum duration of t
CL_PLIM(dly)
(162 ms), turns off the
internal MOSFET, and auto-retries after a time of t
TSD_retry
(648 ms).
Figure 5 and Figure 6 show examples of the current limit at 4.5 A for CH1 and CH2, respectively, on the
TPS2663-166EVM.
Figure 5. TPS2663-166EVM Current Limit Operation for
CH1 (V
IN
= 24 V, I
LIM
= 4.5 A, R
OUT
= 4.5
Ω
, MODE = GND)
Figure 6. TPS2663-166EVM Current Limit Operation for
CH2 (V
IN
= 24 V, I
LIM
= 4.5 A, R
OUT
= 4.5
Ω
, MODE = GND)