Texas Instruments LM5170-Q1 EVM, Руководство пользователя

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Duty Ratio of ISETD PWM Signal
ISET
A Vo
lta
g
e (V
)
0 20% 40% 60% 80% 100%
0
0.5
1
1.5
2
2.5
3
3.5
ISETA (V)
V_Ideal (V)
ISETA Voltage (V)
Channe
l
DC
Cu
rr
ent
(A)
0 200 400 600 800 1000 1200
0
5
10
15
20
25
CH1 Current
CH2 Current
ISETA Voltage (mV)
R
egulatio
n Error (A)
0 200 400 600 800 1000 1200 1400 1600 1800
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
Regulation Error (A)
Ideal
Curre
nt (
A)
-5
0
5
10
15
20
25
30
35
Channel DC Current (A)
ISETA Voltage (mV)
Regu
latio
n Error (A)
0 200 400 600 800 1000 1200 1400 1600 1800
-0.45
-0.4
-0.35
-0.3
-0.25
-0.2
-0.15
-0.1
-0.05
0
0.05
Regulation Error (A)
Ideal
Curre
nt (
A)
0
5
10
15
20
25
30
35
Channel DC Current (A)
Load Current (A)
E
ffi
ci
e
n
c
y (
%
)
0 10 20 30 40 50 60
80
82
84
86
88
90
92
94
96
98
100
D001
V
IN
= 24 V
V
IN
= 36 V
V
IN
= 48 V
V
IN
= 60 V
Load Current (A)
Ef
fi
ci
ency
(%)
0 2 4 6 8 10 12 14
80
82
84
86
88
90
92
94
96
98
100
V
IN
= 16 V
V
IN
= 12 V
V
IN
= 8 V
Test Data
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14 SNVU543A – November 2016 – Revised December 2016
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Copyright © 2016, Texas Instruments Incorporated
LM5170-Q1 EVM User Guide
4 Test Data
4.1 Efficiency
Figure 4. Buck Mode Efficiency vs Input Voltage and Load
Current: V
OUT
= 14.5 V
Figure 5. Boost Mode Efficiency vs Input Voltage and Load
Current: V
OUT
= 50.5 V
4.2 Current Regulation and Monitoring
Figure 6. Channel DC Current Regulation vs ISETA: Buck
Mode
Figure 7. Channel DC Current Regulation vs ISETA: Boost
Mode
Figure 8. ISETD to ISETA Conversion Figure 9. Current Sharing Between Two Channels