Texas Instruments TPS53128, Руководство пользователя

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TP8 TP4
Metal Ground Barrel
Probe Tip
Figure 4-1. Tip and Barrel Measurement for Output Voltage Ripple
4.3.3 Channel 2 Output Voltage Monitoring (TP6 and TP7)
The TPS53128EVM-620 provides two test points for measuring the voltage generated at the V
OUT2
output by
the module. This allows the user to measure the actual output voltage without losses from output cables and
connectors. Measure all DC output voltage between TP7 and TP6. To use TP7 and TP6, connect a voltmeter
positive terminal to TP7 and negative terminal to TP6.
For output ripple measurements, TP7 and TP6 allow a user to limit the ground loop area by using the tip and
barrel measurement technique shown in
Figure 4-1 .
4.3.4 Soft-Start Voltage Monitoring (TP1, TP2, and TP3)
The TPS53128EVM-620 provides two test points for measuring the soft-start ramp voltages. TP1 monitors the
soft-start ramp of Channel 1. TP2 monitors the soft-start ramp of Channel 2. To use TP1 or TP2, connect an
oscilloscope probe between TP1 or TP2 and TP3.
4.3.5 Switching Node Monitoring (TP3, TP5, and TP11)
The TPS53128EVM-620 provides two test points for measuring the switching node waveform voltages. TP5
monitors the switching node of Channel 1. TP2 monitors the switching node of Channel 2. To use TP5 or TP11,
connect an oscilloscope probe between TP5 or TP11 and TP3.
4.3.6 5-V Regulator Output Monitoring (TP3 and TP10)
The TPS53128EVM-620 provides a test point for measuring the output of the internal 5-V regulator. TP10
monitors the output voltage of the internal 5-V regulator. To use TP10, connect a voltmeter positive terminal to
TP10 and negative terminal to TP3.
www.ti.com Connector and Test Point Descriptions
SLVU433A – FEBRUARY 2011 – REVISED JANUARY 2022
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TPS53128 Buck Controller Evaluation Module User's Guide 7
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