Datasheet

−0.1
−0.08
−0.06
−0.04
−0.02
0
0.02
0.04
0.06
0.08
0.1
0 0.5 1 1.5 2 2.5
Output Current (A)
Output Voltage Normalized (%)
Vin = 12 V
G003
−0.1
−0.08
−0.06
−0.04
−0.02
0
0.02
0.04
0.06
0.08
0.1
0 5 10 15 20 25
Input Voltage (V)
Output Voltage Normalized (%)
Iout = 2.5 A
G004
0
10
20
30
40
50
60
70
80
90
100
0 0.5 1 1.5 2 2.5
Output Current (A)
Efficiency (%)
Vin = 8V
Vin = 12V
Vin = 24V
G001
0
10
20
30
40
50
60
70
80
90
100
0.001 0.01 0.1 1
Output Current (A)
Efficiency (%)
Vin = 8V
Vin = 12V
Vin = 24V
G002
www.ti.com Test Setup and Results
4.2 Efficiency
The efficiency of this EVM peaks at a load current of about 600mA at 8V input and 1.5A at 24V input, then
decreases as the load current increases toward full load. Figure 1 shows the efficiency for the
TPS55340EVM-148. Figure 2 shows the light-load efficiency by using a semi log scale.
Figure 1. Efficiency Figure 2. Light-Load Efficiency
The efficiency may be lower at higher ambient temperatures, due to temperature variation in the drain-to-
source resistance of the internal MOSFET.
4.3 Output Voltage Line and Load Regulation
Figure 3 shows the load regulation for the TPS55340EVM-148. Figure 4 shows the line regulation for the
TPS55340EVM-148 with a 2.5A load.
Figure 3. Output Voltage Load Regulation Figure 4. Output Voltage Line Regulation
5
SLVU751A–July 2012–Revised June 2013 TPS55340EVM-148, 8V to 24V Input, 5V Output Flyback Evaluation Module
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