Test Data; Buck Mode Efficiency Vs Input Voltage And Load Current; Out; Boost Mode Efficiency Vs Input Voltage And Load Current - Texas Instruments LM5170-Q1 EVM User Manual

Test Data

4 Test Data
4.1 Efficiency
100
98
96
94
92
90
88
86
84
82
80
0 10 20
Load Current (A)
Figure 4. Buck Mode Efficiency vs Input Voltage and Load
Current: V
4.2 Current Regulation and Monitoring
0.05
0
-0.05
-0.1
-0.15
-0.2
-0.25
-0.3
-0.35
-0.4
-0.45
0 200 400 600
ISETA Voltage (mV)
Figure 6. Channel DC Current Regulation vs ISETA: Buck
3.5
3
2.5
2
1.5
1
0.5
0
0 20% 40%
Duty Ratio of ISETD PWM Signal
Figure 8. ISETD to ISETA Conversion
14
LM5170-Q1 EVM User Guide
V = 24 V
IN
V = 36 V
IN
V = 48 V
IN
V = 60 V
IN
30 40 50
= 14.5 V

OUT

Channel DC Current (A)
Regulation Error (A)
800 1000 1200 1400 1600 1800
Mode
ISETA (V)
V_Ideal (V)
60% 80% 100%
Copyright © 2016, Texas Instruments Incorporated
100
98
96
94
92
90
88
86
84
82
80
0 2
60
D001
Figure 5. Boost Mode Efficiency vs Input Voltage and Load
35
0.2
30
0
25
-0.2
20
-0.4
15
-0.6
10
-0.8
5
0
-1
0 200 400
Figure 7. Channel DC Current Regulation vs ISETA: Boost
25
20
15
10
5
0
0 200
Figure 9. Current Sharing Between Two Channels
SNVU543A – November 2016 – Revised December 2016
V
IN
V
IN
V
IN
4 6 8 10 12
Load Current (A)
Current: V = 50.5 V
OUT
Channel DC Current (A)
Regulation Error (A)
600 800 1000 1200 1400 1600 1800
ISETA Voltage (mV)
Mode
CH1 Current
CH2 Current
400 600 800 1000
ISETA Voltage (V)
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= 16 V
= 12 V
= 8 V
14
35
30
25
20
15
10
5
0
-5
1200