Texas Instruments TPS546B24AEVM-2PH, User Manual, Page: 10 / 47

4.2.7 Recommended Wire Gauge
• Input VIN and GND to T1 and T2 (GND) (12-V input) – The recommended wire size is AWG #12, with the
total length of wire less than two feet (1-foot input, 1-foot return).
• Output T3 and GND T5 (0.8-V output) – The minimum recommended wire size is AWG #10 with the total
length of wire less than two feet (1-foot output, 1-foot return). A thicker wire gauge can be required to
minimize the voltage drop the wires.
4.3 Tip and Barrel Measurement
Figure 4-1 illustrates the tip and barrel measurement for switching node waveform on TP2_P1 with TP4_P1 or
TP2_P2 with TP4_P2.
Metal Ground
Barrel
Probe
Tip
Figure 4-1. Tip and Barrel Measurement
4.4 List of Test Points, Jumpers, and Connectors
Table 4-1 lists the test point functions.
Table 4-1. Test Point Functions
Test
Point
Type Name Description
TP1_P1 T-H Loop PVIN_P1 PVIN pin voltage of U1_P1 device measurement point
TP1_P2 T-H Loop PVIN_P2 PVIN pin voltage of U1_P2 device measurement point
TP2_P1 T-H Loop SW_P1 Switching node of output rail phase 1 measurement point, reference to TP4_P1
TP2_P2 T-H Loop SW_P2 Switching node of output rail phase 2 measurement point, reference to TP4_P2
TP3_P1 T-H Loop GND_P1 GND pin voltage of U1_P1 device measurement point
TP3_P2 T-H Loop GND_P2 GND pin voltage of U1_P2 device measurement point
TP4_P1 T-H Loop GND_P1 GND reference for switch node measurement of U1_P1
TP4_P2 T-H Loop GND_P2 GND reference for switch node measurement of U1_P2
TP5_P1 T-H Loop PG_S_P1 PGOOD signal of phase 1
TP5_P2 T-H Loop PG_S_P2 PGOOD signal of phase 2
TP6 T-H Loop AUX_5V External 5-V measurement point for VDD5
TP7 T-H Loop DATA DATA signal on J2 header
TP8 T-H Loop SMBALRT SMBALERT signal on J2 header
TP9 T-H Loop CNTL CNTL signal on J2 header
TP10 T-H Loop CLK CLK signal on J2 header
TP11 T-H Loop GND GND reference
TP12 T-H Loop PVIN VIN + measurement point
TP13 T-H Loop VOUT_P1 U1_P1 output voltage measurement point for efficiency, reference to TP16
TP14 T-H Loop Remote SNS+ OUTPUT remote sense + voltage point
TP15 T-H Loop GND VIN- measurement point
TP16 T-H Loop GND_P1 U1_P1 output voltage referencing GND for efficiency measurement
TP17 T-H Loop CH_A OUTPUT for small signal loop gain measurements (B/A setup)
TP18 T-H Loop CH_B INPUT for small signal loop gain measurements (B/A setup)
TP19 T-H Loop Ext_AVIN AVIN measurement point
TP20 T-H Loop GND GND reference
TP21 T-H Loop VSHARE VSHARE measurement point. Sensitive signal
Test Setup www.ti.com
10 TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module
User's Guide SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022
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