Texas Instruments TPS54334EVM-722, Руководство пользователя, Страница: 5 / 21

Output Current (A)
E
ffi
ci
e
n
c
y %
0
10
20
30
40
50
60
70
80
90
100
1m 10m 100m 1 3
D018
V
IN
= 12 V
V
IN
= 24 V
Output Current (A)
E
ffi
ci
e
n
c
y %
0 0.5 1 1.5 2 2.5 3
0
10
20
30
40
50
60
70
80
90
100
D017
V
IN
= 12 V
V
IN
= 24 V
www.ti.com
Test Setup and Results
2.2 Efficiency
The efficiency of this EVM peaks at a load current of about 0.5 A – 1 A, and then decreases as the load
current increases towards full load.
Figure 1 shows the efficiency for the TPS54334EVM-722 at an
ambient temperature of 25°C.
Figure 1. TPS54334EVM-722 Efficiency
Figure 2 shows the efficiency for the TPS54334EVM-722 on a semi-log scale to better show light load
efficiency. The ambient temperature is 25°C.
Figure 2. TPS54334EVM-722 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 MOSFET.
5 SLVUAH4 – August 2015 TPS54334EVM-722 3-A Regulator Evaluation Module
Submit Documentation Feedback
Copyright © 2015, Texas Instruments Incorporated