Figure 4-3. Output Soft Start Voltage, Vin = 5 V, Vout = 1 V, Iout = 18 A; Figure 4-4. Transient Response To Load Step 9 A To 18 A At 1 A/Μs - Texas Instruments TPS7H4003EVM User Manual

www.ti.com
4.3 Soft Startup
Display CH1 (PH) and CH2 (VOUT) [DC coupled, 500 mV/div] on oscilloscope to monitor the switching phase
and the soft start profile of the output voltage as shown in

Figure 4-3. Output Soft Start Voltage, VIN = 5 V, VOUT = 1 V, IOUT = 18 A

4.4 Transient Response to Positive/Negative Load Step (9 A to 18 A to 9 A)
1. Configure e-load to switch between 9 A and 18 A at a rate of 1 A/µs.
2. On oscilloscope, display CH2 (VOUT) [AC coupled, 20 mV/div] and CH4 (Output Current Probe) [5 A/div,
trigger rising edge ≈12 A] with 40 µs/div.
Figure 4-4 shows the response to this load step to be less than 35 mV or –3.5%.
Figure 4-4. Transient Response to Load Step 9 A to 18 A at 1 A/µs
SLVUC73A – JANUARY 2022 – REVISED AUGUST 2023
Submit Document Feedback
Figure
Copyright © 2023 Texas Instruments Incorporated
4-3.
TPS7H4003EVM Evaluation Module (EVM)
TPS7H4003EVM Testing
7