Texas Instruments TPS543320EVM, Руководство пользователя

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Output Current (A)
E
ff
icien
cy
(%)
0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3
50
55
60
65
70
75
80
85
90
95
100
V
IN
= 5 V
V
IN
= 9 V
V
IN
= 12 V
V
IN
= 15 V
V
OUT
= 1.8 V f
SW
= 1500 kHz
Figure 3-1. U1 Efficiency
Output Current (A)
E
ff
icien
cy
(%)
0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3
50
55
60
65
70
75
80
85
90
95
100
V
IN
= 5 V
V
IN
= 9 V
V
IN
= 12 V
V
IN
= 18 V
V
OUT
= 3.3 V f
SW
= 1000 kHz
Figure 3-2. U2 Efficiency – Default Configuration
Output Current (A)
E
ff
icien
cy
(%)
0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3
50
55
60
65
70
75
80
85
90
95
100
V
OUT
= 1.8 V
V
OUT
= 2.5 V
V
OUT
= 3.3 V
V
OUT
= 5 V
V
IN
= 12 V f
SW
= 1000 kHz
Figure 3-3. U2 Efficiency – 1000-kHz Switching
Frequency with Different Output Voltages
Output Current (A)
E
ff
icien
cy
(%)
0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3
50
55
60
65
70
75
80
85
90
95
100
V
OUT
= 1.8 V
V
OUT
= 2.5 V
V
OUT
= 3.3 V
V
OUT
= 5 V
V
IN
= 9 V V
OUT
= 3.3 V
Figure 3-4. U2 Efficiency – 3.3-V Output with
Different Switching Frequencies
Test Setup and Results www.ti.com
12 TPS543320 SWIFT™ Step-Down Converter Evaluation Module User's Guide SLVUC07A – DECEMBER 2020 – REVISED MAY 2021
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