ISL6721EVAL3Z Intersil, ISL6721EVAL3Z Datasheet - Page 7

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

Specifications of ISL6721EVAL3Z

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

Operation Waveforms
The schematics and bill of material are shown at the end
of this application note. Gerber files of this evaluation
board are available upon request. Typical performance
waveforms can be found in Figures 6 through 9.
Figure 6 shows the start-up waveform of the output
voltages of the two rails, 12V and 18V. With the external
soft-start up capacitor, this period can be configured
conveniently. Figures 7, 8 and 9 show the drain-source
voltages of the primary side MOSFET for input 25V and
50V, respectively. The three intervals of operations can
be easily observed.
I
TABLE 4. REGULATION AND EFFICIENCY -
FIGURE 6. START-UP WITH 32V INPUT, I
OUT1
(A)
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
I
OUT
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
(A)
IN
I
OUT2
= 52.8V (Continued)
V
11.968
12.010
12.033
11.983
12.015
11.942
11.991
12.018
11.960
11.999
11.967
12.006
11.970
11.970
OUT1
(V)
= 1A
V
IN
= 52.8V
7
V
18.140
17.828
17.560
18.014
17.757
18.259
17.934
17.683
18.111
17.866
18.027
17.794
17.950
17.877
OUT2
(V)
0.6540
0.6730
0.6890
0.7310
0.7490
0.7910
0.8090
0.8270
0.8680
0.8860
0.9470
0.9650
1.0250
1.1040
I
(A)
IN
Application Note 1491
OUT1
EFFICIENC
Y (%)
79.82
80.80
81.35
80.76
81.49
80.23
81.33
81.78
81.05
81.85
81.46
82.05
81.83
82.01
= 2A,
Reference:
ISL6721 datasheet FN9110, Intersil Corporation
ISL6745 datasheet FN9161, Intersil Corporation
FIGURE 7. DRAIN-SOURCE VOLTAGE FOR V
FIGURE 8. DRAIN SOURCE VOLTAGE FOR V
FIGURE 9. DRAIN-SOURCE VOLTAGE FOR V
ILOAD12V = 0.5A, ILOAD18V = 0.5A
ILOAD12V = 0.5A, ILOAD18V = 0.5A
ILOAD12V = 2A, ILOAD18V = 1A
IN
IN
IN
= 50V,
= 25V,
= 32V,
AN1491.0