Texas Instruments TPS2596, Руководство пользователя, Страница: 11 / 20

www.ti.com
General Configurations
11 SLVUBN7A – April 2019 – Revised August 2019
Submit Documentation Feedback
Copyright © 2019, Texas Instruments Incorporated
TPS2596EVM: Evaluation Module for TPS2596xx
Figure 4. J11 = 3-4, Current Limit (1.0 A) Test with Latch (CH2)
5. Set the input power supply to zero volts and disconnect all equipment from the DUT.
4.3.1.4 Overvoltage Test
Use the following steps to conduct the overvoltage test.
1. Verify all three overvoltage limits (CH1 and CH2, with only 1 channel powered at a time) and verify the
latch and auto-retry feature. Setup the oscilloscope as shown in Table 10 .
Table 10. TPS2596EVM Oscilloscope Setting for Overvoltage Test
Oscilloscope Setting CH1 Probe Points CH2 Probe Points
Channel 2 = 5 V/div TP1 = VIN1 TP17 = VIN2
Channel 4 = 5 V/div TP2 = VOUT1 TP18 = VOUT2
Trigger source Channel 2 Channel 2
Trigger polarity = +ve
Trigger mode = Single sequence
Time base 50 ms/div 50 ms/div
2. The jumper setting for the different overvoltage limit test is shown in Table 11 .
Table 11. TPS2596EVM Jumper Settings for Over Load Limits
CH1 Jumper Setting, J3
CH1 Output Clamp
Threshold
CH2 Jumper Setting, J12
CH2 Overvoltage Lockout
Threshold
1-2 13.58 V 1-2 13.58 V
3-4 5.45 V 3-4 5.45 V
5-6 3.59 V 5-6 3.59 V