Texas Instruments TPS54A20, Руководство пользователя, Страница: 6 / 25

Output Current (A)
Ef
ficie
nc
y
(%)
0.001 0.01 0.1 1 10
0
10
20
30
40
50
60
70
80
90
100
D002
V
IN
= 9V
V
IN
= 12V
V
IN
= 14V
Output Current (A)
Ef
ficie
nc
y
(%)
0 1 2 3 4 5 6 7 8 9 10
0
10
20
30
40
50
60
70
80
90
100
D001
V
IN
= 9V
V
IN
= 12V
V
IN
= 14V
Test Setup and Results
www.ti.com
6 SLVUAM8A – December 2015 – Revised March 2019
Submit Documentation Feedback
Copyright © 2015–2019, Texas Instruments Incorporated
TPS54A20EVM-770, 10-A, SWIFT™ regulator evaluation module
2.2 Efficiency
The efficiency of this EVM peaks at a load current of about 5 A and then decreases as the load current
increases toward full load.
Figure 1 shows the efficiency for the TPS54A20EVM-770 at an ambient
temperature of 25°C.
Figure 1. TPS54A20EVM-770 Efficiency
Figure 2 shows the efficiency for the TPS54A20EVM-770 using a semi-log scale to more easily show
efficiency at lower output currents. The ambient temperature is 25°C.
Figure 2. TPS54A20EVM-770 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.