Texas Instruments TPS54320, Руководство пользователя

Страница: 5 / 21

2.2 Efficiency
The efficiency of this EVM peaks at a load current of about 0.9 A and then decreases as the load current
increases towards full load.
Figure 2-1 shows the efficiency for the TPS54320 at an ambient temperature of
25°C.
60
65
70
75
80
85
90
95
100
0 0.5 1 1.5 2 2.5 3
Load Current - A
V = 10 V
I
V = 12 V
I
V = 15 V
I
V = 17 V
I
V = 8 V
I
Efficiency-%
Figure 2-1. TPS54320 Efficiency
Figure 2-2 shows the efficiency for the TPS54320 at lower output currents below 0.20 A at an ambient
temperature of 25°C.
0 20 40 60 80 100 120 140 160 180 200
0
10
20
30
40
50
60
70
80
90
100
Efficiency - %
I - Output Current - mA
O
V = 17 V
I
V = 8 V
I
V = 15 V
I
V = 10 V
I
V = 12 V
I
Figure 2-2. TPS54320 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.
www.ti.com Test Setup and Results
SLVU380A – SEPTEMBER 2010 – REVISED OCTOBER 2021
Submit Document Feedback
TPS54320 Step-Down Converter Evaluation Module User's Guide 5
Copyright © 2021 Texas Instruments Incorporated