Typical Performance Characteristics - Analog Devices EVAL-LT7170-1-AZ User Manual

Evaluation Board User Guide

Typical Performance Characteristics

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100
FLOAT EXTV
CC
f = 1MHz
SW
95
V = 8V
IN
V = 12V
IN
EFFICIENCY
V = 15V
IN
90
85
80
75
70
0 2 4 6
LOAD CURRENT (A)
Figure 4. Efficiency vs. Load Current at 1MHz Switching Frequency
70
60
50
40
30
20
10
0
–10
0 100 200 300
FREQUENCY (MHz)
EVAL-LT7170-1-AZ DEMO BOARD
(WITH EMI FILTER INSTALLED)
12V INPUT TO 1V OUTPUT AT 20A, f
70
60
50
40
30
20
10
0
–10
0 100 200 300
FREQUENCY (MHz)
EVAL-LT7170-1-AZ DEMO BOARD
(WITH EMI FILTER INSTALLED)
12V INPUT TO 1V OUTPUT AT 20A, f
Figure 5. EVAL-LT7170-1-AZ Radiated EMI Performance
EVAL-LT7170-1-AZ
POWER LOSS
8 10 12 14 16 18
CLASS B LIMIT
400 500 600 700 800 900
= 1MHz
SW
CLASS B LIMIT
400 500 600 700 800 900
= 1MHz
SW
6
5
4
3
2
1
0
20
1000
1000
Rev. A 4 of 13