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Figure 2-10. TPS54231EVM-372 Start-up Relative to Enable
2.10 Eco-mode Operation
At light load currents, the TPS54231 is designed to operate in pulse skipping Eco-mode. When the peak inductor
current is lower than 100 mA typical, the device enters Eco-mode.
Figure 2-11
shows Eco-mode operation, channel 1(C1) shows the output voltage while channel 2(C2) shows the
switching node (PH).
2.11 Thermal Characteristics
This section shows a thermal image of the TPS54231EVM-372 running at 28 V input and 2 A load. These are
the worst case conditions for maximum power loss. There is no air flow and the ambient temperature is 25°C.
The peak temperature of the IC (85.8°C) is well below the maximum recommended operating condition listed in
the datasheet of 150°C.
SLVU263A – AUGUST 2008 – REVISED OCTOBER 2021
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Figure 2-11. TPS54231EVM–372 Eco–mode Operation
Copyright © 2021 Texas Instruments Incorporated
TPS54231 Step-Down Converter Evaluation Module User's Guide
Test Setup and Results
9
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