Texas Instruments TPS2663-166EVM, Руководство пользователя, Страница: 11 / 17

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Test Procedure and Results
11 SLVUBQ5A – August 2019 – Revised October 2019
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TPS2663-166EVM: Evaluation Module for TPS2663xPWP and
TPS1663xPWP
6.4 Reverse Input Polarity Test [TPS26633 Only]
Use the following instructions to perform the reverse input polarity 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 output to the T1 terminal of the EVM in reverse polarity.
• Observe the waveforms of V
IN
, V
OUT
, and I
IN
using an oscilloscope.
Figure 9 shows an example of reverse input polarity protection on the TPS2663-166EVM. The device
turns-off the internal MOSFET and disconnects the output from the input.
Figure 9. TPS2663-166EVM Reverse Input Polarity for CH1 (V
IN
= -32 V, I
LIM
= 6 A, MODE = GND)
6.5 Reverse Current Blocking Test [TPS26633 Only]
Use the following instructions to perform the reverse current blocking 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 output to terminal T2 of the EVM with the positive on pin 1 and the negative
on pin 2.
• Observe the waveforms of V
IN
, V
OUT
, and IOUT using an oscilloscope.
Figure 10 shows an example of the reverse current blocking protection on the TPS2663-166EVM.
Figure 10. TPS2663-166EVM Reverse Current Blocking for CH1 (V
OUT
= 32 V, V
IN
= 0 V I
LIM
= 6 A, MODE =
GND)