Texas Instruments TPS54521EVM-607, User Manual

Page: 6 / 23

2.2 Efficiency
The efficiency of this EVM peaks at a load current of about 1.1 A and then decreases as the load current
increases towards full load.
Figure 2-1 shows the efficiency for the TPS54521EVM-607 at an ambient
temperature of 25°C.
0 1 2 3 4 5
I - Output Current - A
O
60
65
70
75
80
85
90
95
100
Efficiency - %
V = 15 V
I
V = 17 V
I
V = 10 V
I
V = 12 V
I
V = 8 V
I
Figure 2-1. TPS54521EVM-607 Efficiency
Figure 2-2 shows the efficiency for the TPS54521EVM-607 at lower output currents below 0.10 A at an ambient
temperature of 25°C.
0
10
20
30
40
50
60
70
80
90
100
0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
Efficiency - %
I - Output Current - A
O
V = 12 V
I
V = 8 V
I
V = 15 V
I
V = 17 V
I
V = 10 V
I
Figure 2-2. TPS54521EVM-607 Low Current Efficiency
The efficiency may be lower at higher ambient temperatures, due to temperature variation in the drain-to-source
resistance of the internal MOSFETs.
Test Setup and Results www.ti.com
6 TPS54521 Step-Down Converter Evaluation Module User's Guide SLVU379A – AUGUST 2010 – REVISED AUGUST 2021
Submit Document Feedback
Copyright © 2021 Texas Instruments Incorporated