TPS40200-Q1
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SLUS739D –SEPTEMBER 2006–REVISED JULY 2011
Application 2: 18-V to 50-V Input, 16-V Output at 1 A
This is an example of using the TPS40200 in a higher voltage application. The output voltage is 16 V at 1 A with
an 18-V to 50-V input. Module boards built to this schematic and a test report are available.
Test Results
The efficiency and load regulation from boards built from this design are shown in Figure 49 and Figure 50.
Further information and support material is available.
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Figure 48. Buck Converter: VIN = 18 V to 50 V, VOUT = 16 V at 1 A
100
95
90
85
80
75
70
16.500
16.450
16.400
16.350
16.300
16.250
16.200
16.150
16.100
VIN = 24 V
VIN = 48 V
VIN = 48 V
VIN = 24 V
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Load Current - A
Load Current - A
Figure 49. Efficiency vs Load
Figure 50. Load Regulation, Two Input Voltage
Extremes
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