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TPS7H4003EVM Testing
4 TPS7H4003EVM Testing
The following tests will be described in subsequent sections.
•
Section 4.1
Output voltage regulation
•
Section 4.2
Output voltage ripple
•
Section 4.3
Soft startup
•
Section 4.4
Transient response to positive/negative load step (9 A to 18 A to 9 A)
•
Section 4.5
Loop frequency response
4.1 Output Voltage Regulation
1. Turn-on input DC source (5 V).
2. Turn on the e-load and sweep load current from 0 A to 18 A. The monitored output voltage at TP12 (VOUT)
is at or near 1.0 V across the entire current load sweep as shown in
4.2 Output Voltage Ripple
Display CH1 (PH) and CH2 (VOUT) [AC coupled, BW = 20 MHz] on oscilloscope to monitor the switching phase
node and the output voltage ripple as shown in
Figure 4-2. Output Voltage Ripple VIN = 5 V, VOUT = 1 V, IOUT = 18 A
6
TPS7H4003EVM Evaluation Module (EVM)
Figure 4-1. Output Voltage Regulation
Figure
4-2.
Copyright © 2023 Texas Instruments Incorporated
Figure
4-1.
SLVUC73A – JANUARY 2022 – REVISED AUGUST 2023
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