Download ISL8117EVAL2Z User Guide

User Guide 020
Typical Evaluation Board Performance Curves
100
100
95
95
90
VIN = 48V
85
VIN = 60V
VIN = 36V
80
VIN = 24V
EFFICIENCY (%)
EFFICIENCY (%)
90
VIN = 18V
75
VIN = 60V
65
4
6
8
10
12
IOUT (A)
14
16
18
60
20
0
FIGURE 4. CCM EFFICIENCY vs LOAD
4
6
8
10
12
IOUT (A)
14
16
18
20
12.20
12.18
12.18
VIN = 18V
12.16
12.14
IO = 0A
12.16
12.14
VIN = 48V
12.12
VOUT (V)
VOUT (V)
2
FIGURE 5. DEM EFFICIENCY vs LOAD
12.20
12.10
12.08
12.12
12.10
12.08
12.06
12.06
VIN = 60V
12.04
12.02
12.00
VIN = 18V
VIN = 24V
75
65
2
VIN = 36V
80
70
0
VIN = 48V
85
70
60
VIN = 48V, unless otherwise noted.
12.04
VIN = 36V
0
2
4
6
8
10
VIN = 24V
12
14
16
18
20
IOUT (A)
FIGURE 6.
IO = 20A
IO = 10A
12.02
12.00
18
23
28
33
38
43
48
53
58
VIN (V)
FIGURE 7. CCM MODE LINE REGULATION
CCM MODE LOAD REGULATION
5
PHASE 50V/DIV
CCM
LGATE 5V/DIV
IIN (A)
0.5
CLKOUT 5V/DIV
0.05
DEM
0.005
0.01
IL 5A/DIV
0.1
1
10
1µs/DIV
IOUT (A)
FIGURE 8. INPUT CURRENT COMPARISON WITH MODE = CCM/DEM
Submit Document Feedback
4
FIGURE 9. PHASE, LGATE, CLKOUT AND INDUCTOR CURRENT
WAVEFORMS
UG020.0
March 17, 2015