Intersil ISL8215MEVAL1Z, Руководство пользователя

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UG105 Rev.0.00 Page 8 of 14
Aug 14, 2017
ISL8215MEVAL1Z 3. PCB Layout Guidelines
3.3 Typical Evaluation Board Performance Curves
The following data was acquired using the ISL8215MEVAL1Z evaluation board at +25°C ambient and free air 0LFM.
Figure 5. Efficiency vs Load Current at V
IN
= 12V,
CCM Mode
Figure 6. Efficiency vs Load Current at V
IN
= 24V,
CCM Mode
Figure 7. Efficiency vs Load Current at V
IN
= 30V,
CCM Mode
Figure 8. Efficiency vs Load Current at V
IN
= 42V,
CCM Mode
Figure 9. Output Ripple, V
IN
= 24V, V
OUT
= 3.3V, PSM/DEM
Mode, C
OUT
= 4x100µF C 1x470µF POSCAP
Figure 10. Output Ripple, V
IN
= 24V, V
OUT
= 3.3V,
f
SW
= 300kHz, CCM Mode, C
OUT
= 4x100µF
C 1x470µF POSCAP
60
65
70
75
80
85
90
95
100
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0.9Vout, 300kHz 1Vout, 300kHz
1.2Vout, 300kHz 1.5Vout, 300kHz
1.8Vout, 300kHz 2.5Vout, 300kHz
3.3Vout, 300kHz 5Vout, 300kHz
EFFICIENCY (%)
LOAD CURRENT (A)
60
65
70
75
80
85
90
95
100
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0.9Vout, 300kHz 1Vout, 300kHz
1.2Vout, 300kHz 1.5Vout, 300kHz
1.8Vout, 300kHz 2.5Vout, 300kHz
3.3Vout, 300kHz 5Vout, 300kHz
12Vout, 600kHz
EFFICIENCY
(%)
LOAD CURRENT (A)
55
60
65
70
75
80
85
90
95
100
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0.9Vout, 300kHz 1Vout, 300kHz
1.2Vout, 300kHz 1.5Vout, 300kHz
1.8Vout, 300kHz 2.5Vout, 300kHz
3.3Vout, 300kHz 5Vout, 300kHz
12Vout, 600kHz
EFFICIENCY (%)
LOAD CURRENT (A)
50
55
60
65
70
75
80
85
90
95
100
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0.9Vout, 300kHz 1Vout, 300kHz
1.2Vout, 300kHz 1.5Vout, 300kHz
1.8Vout, 300kHz 2.5Vout, 300kHz
3.3Vout, 300kHz 5Vout, 300kHz
12Vout, 600kHz
EFFICIENCY (%)
LOAD CURRENT (A)
I
OUT
= 0A
V
OUT
= 20mV/DIV
I
OUT
= 15A
V
OUT
= 20mV/DIV
2µs/DIV
I
OUT
= 0A
V
OUT
= 20mV/DIV
I
OUT
= 15A V
OUT
= 20mV/DIV
2µs/DIV