Load Current (A)
Ef
fi
ci
ency
(%)
0.001
0.01
0.1
1
7
30
40
50
60
70
80
90
100
V
IN
= 8V
V
IN
= 12V
V
IN
= 18V
Load Current (A)
Eff
icie
n
cy (%)
0
1
2
3
4
5
6
7
60
65
70
75
80
85
90
95
100
V
IN
= 8V
V
IN
= 12V
V
IN
= 18V
Test Data and Performance Curves
12
SNVU623B – October 2018 – Revised April 2020
Copyright © 2018–2020, Texas Instruments Incorporated
LM5143-Q1 EVM User's Guide
Figure 8. Ch2 Efficiency, V
IN
= 12 V, V
OUT2
= 5 V, FPWM, Channel 1 OFF
Figure 9. Ch2 Efficiency, V
IN
= 12 V, V
OUT2
= 5 V, Diode Emulation, Channel 1 OFF (Log Scale)