Texas Instruments Isolated Flyback Topology Module for TPS55340 TPS55340EVM-148 TPS55340EVM-148 Datenbogen
Produktcode
TPS55340EVM-148
−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
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
Vin = 12V
Vin = 24V
G002
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.
decreases as the load current increases toward full load.
shows the efficiency for the
TPS55340EVM-148.
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.
source resistance of the internal MOSFET.
4.3
Output Voltage Line and Load Regulation
shows the load regulation for the TPS55340EVM-148.
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
Copyright © 2012–2013, Texas Instruments Incorporated