Texas Instruments LMQ61460-Q1, Руководство пользователя

Страница: 14 / 25

Load Current (A)
Ef
fic
ie
nc
y
(%
)
0.001 0.010.02 0.05 0.1 0.2 0.5 1 2 3 4 5 7 10
60%
65%
70%
75%
80%
85%
90%
95%
100%
LM61
V
IN
= 8 V
V
IN
= 13.5 V
V
IN
= 24 V
Figure 6-11. F
SW
= 2.1 MHz, 5 VOUT, Auto Mode
Load Current (A)
Ef
fic
ie
nc
y
(%
)
0 1 2 3 4 5 6 7
50%
55%
60%
65%
70%
75%
80%
85%
90%
95%
100%
LM61
V
IN
= 8 V
V
IN
= 13.5 V
V
IN
= 24 V
Figure 6-12. F
SW
= 2.1 MHz, 5 VOUT, FPWM Mode
Output Current (A)
Ef
fic
ie
nc
y
(%
)
0.001 0.010.02 0.05 0.1 0.2 0.5 1 2 3 4 5 7 10
60%
65%
70%
75%
80%
85%
90%
95%
100%
LM61
V
IN
= 8 V
V
IN
= 13.5 V
V
IN
= 24 V
Figure 6-13. F
SW
= 2.1 MHz, 3.3 VOUT, Auto Mode
Output Current (A)
Ef
fic
ie
nc
y
(%
)
0 1 2 3 4 5 6 7
50%
55%
60%
65%
70%
75%
80%
85%
90%
95%
100%
LM61
V
IN
= 8 V
V
IN
= 13.5 V
V
IN
= 24 V
Figure 6-14. F
SW
= 2.1 MHz, 3.3 VOUT, FPWM Mode
6.3 Load Regulation
This section provides efficiency plots for the board with LMQ61460AAS populated for Auto mode efficiency and
LMQ61460AFS populated for FPWM mode efficiency. For 2.1-MHz data, the output stage has to be changed
from the default BOM. The inductor (L1) selected was XEL5030-102MEB.
Output Current (A)
O
ut
p
u
t
Vo
lt
a
ge
(V
)
0 1 2 3 4 5 6 7
4.95
4.97
4.99
5.01
5.03
5.05
5.07
5.09
5.11
SNVS
V
IN
= 8 V
V
IN
= 13.5 V
V
IN
= 24 V
Figure 6-15. F
SW
= 400 kHz, 5 VOUT, Auto Mode
Output Current (A)
O
ut
p
u
t
Vo
lt
a
ge
(V
)
0 1 2 3 4 5 6 7
4.95
4.97
4.99
5.01
5.03
5.05
5.07
5.09
5.11
SNVS
V
IN
= 8 V
V
IN
= 13.5 V
V
IN
= 24 V
Figure 6-16. F
SW
= 400 kHz, 5 VOUT, FPWM Mode
LMQ61460EVM-400K Board Test Results www.ti.com
14 LMQ61460EVM-400K User's Guide SNVU698B – SEPTEMBER 2020 – REVISED DECEMBER 2020
Submit Document Feedback
Copyright © 2021 Texas Instruments Incorporated