ISL6721EVAL3Z Intersil, ISL6721EVAL3Z Datasheet - Page 6

• Manufacturer Part Number: ISL6721EVAL3Z
• Description: EVAL BOARD 3 FOR ISL6721
• Manufacturer: Intersil

Specifications of ISL6721EVAL3Z

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Typical Performance
Characteristics
The major performance will be examined in terms of
efficiency, and load/line regulation, and shown in Tables 2
through 4 for input voltages V
respectively.
The performance closely matches the design
specifications. While the efficiency varies over different
combinations of line and load, the full-load efficiency
target of 80% has been comfortably met under all input
voltage conditions. As expected, the worst regulation is
seen at extreme input voltage conditions, and when one
rail is at full load with the other rail at minimum load.
Since the feedback has been weighted at 80% to 20%
between the 12V and 18V, to provide the 12V rail with
the tighter regulation. The regulation of the 18V output is
well maintained for normal operation conditions, while
becomes loose as either one of the outputs is less than
20% of full load.
TABLE 2. REGULATION AND EFFICIENCY - V
I
OUT1
(A)
0.5
0.5
1.0
0.5
1.0
0.5
1.5
1.0
0.5
1.5
1.0
2.0
1.5
1.0
2.0
1.5
2.5
2.0
1.5
2.5
2.0
2.5
2.0
2.5
2.5
I
OUT2
(A)
0.2
0.4
0.2
0.6
0.4
0.8
0.2
0.6
1.0
0.4
0.8
0.2
0.6
1.0
0.4
0.8
0.2
0.6
1.0
0.4
0.8
0.6
1.0
0.8
1.0
V
11.989
12.003
11.978
12.013
11.989
12.022
11.963
11.997
12.031
11.977
12.003
11.957
11.988
12.009
11.969
11.997
11.937
11.979
12.005
11.954
11.987
11.966
11.995
11.974
11.983
OUT1
(V)
V
IN
= 21.6V
6
V
17.779
17.677
17.919
17.598
17.823
17.524
18.029
17.744
17.449
17.935
17.673
18.165
17.859
17.606
18.049
17.788
18.314
17.967
17.719
18.166
17.895
18.077
17.826
18.005
17.936
OUT2
(V)
IN
= 22V, 34V and 52.8V,
0.5110
0.6830
0.8110
0.8570
0.9880
1.0310
1.1220
1.1690
1.2110
1.3061
1.3490
1.4440
1.4930
1.5360
1.6340
1.6800
1.7790
1.8270
1.8730
1.9760
2.0210
2.1780
2.2220
2.3790
2.5890
I
(A)
IN
Application Note 1491
EFFICIENC
IN
Y (%)
86.53
88.61
88.84
89.49
89.59
89.94
88.92
89.68
89.70
89.11
89.71
88.32
88.99
89.26
88.28
88.81
87.19
88.03
88.31
87.04
87.71
86.64
87.13
86.29
85.64
= 21.6V
I
I
TABLE 4. REGULATION AND EFFICIENCY -
TABLE 3. REGULATION AND EFFICIENCY - V
OUT1
OUT1
(A)
(A)
0.5
0.5
1.0
0.5
1.0
0.5
1.5
1.0
0.5
1.5
1.0
0.5
0.5
1.0
0.5
1.0
0.5
1.5
1.0
0.5
1.5
1.0
2.0
1.5
1.0
2.0
1.5
2.5
2.0
1.5
2.5
2.0
2.5
2.0
2.5
2.5
2
2
I
I
0.2
0.4
0.2
0.6
0.4
0.8
0.2
0.6
1.0
0.4
0.8
0.2
0.6
1.0
0.4
0.8
0.2
0.6
1.0
0.4
0.8
0.6
1.0
0.8
1.0
0.2
0.4
0.2
0.6
0.4
0.8
0.2
0.6
1.0
0.4
0.8
OUT
OUT
(A)
V
(A)
IN
= 52.8V
V
12.021
12.012
11.982
12.022
11.996
12.031
11.917
12.004
12.038
11.983
12.011
11.956
11.991
12.015
11.968
11.998
11.943
11.977
12.004
11.957
11.983
11.965
11.990
11.972
11.978
V
12.010
12.027
11.993
12.040
12.012
12.050
11.984
12.024
12.054
12.001
12.030
OUT1
(V)
OUT1
(V)
V
V
IN
IN
= 34.0V
= 52.8V
V
17.823
17.677
17.955
17.557
17.806
17.447
18.041
17.712
17.342
17.904
17.638
V
17.800
17.663
17.925
17.578
17.813
17.503
18.026
17.737
17.427
17.924
17.668
18.134
17.845
17.600
18.025
17.775
18.281
17.945
17.706
18.137
17.873
18.053
17.803
17.980
17.909
OUT2
OUT2
(V)
(V)
0.3580
0.4720
0.5570
0.5860
0.6720
0.7000
0.7610
0.8580
0.8160
0.8790
0.9060
0.9680
0.9980
1.0260
1.0890
1.1170
1.1829
1.2110
1.2400
1.3060
1.3330
1.4310
1.4580
1.5550
1.6830
0.2590
0.3320
0.3870
0.4060
0.4620
0.4790
0.5200
0.5380
0.5530
0.5960
0.6130
(A)
I
(A)
I
IN
IN
EFFICIENC
EFFICIENC
IN
Y (%)
Y (%)
78.63
81.45
82.20
83.10
83.69
84.11
83.02
77.63
84.51
84.13
84.88
83.67
84.56
84.90
84.12
84.83
83.33
84.33
84.71
83.66
84.43
83.74
84.29
83.82
83.63
69.98
74.64
76.27
77.22
78.44
79.01
78.61
79.74
80.04
79.96
80.76
= 34V
AN1491.0