Emi Test Results - Analog Devices DC3054A-B Demo Manual

EMI TEST RESULTS

Radiated EMI Performance (CISPR25 Radiated
Emissions Test with Class 5 Peak Limits)
(CISPR25 Radiated Emission Test with Class 5 Peak Limits)
60
HORIZONTAL POLARIZATION
50
40
30
20
10
0
–10
–20
0 100 200 300 400
FREQUENCY (MHz)
DC3054A–B DEMO BOARD
(WITH EMI FILTER INSTALLED)
3.3V INPUT TO 1.8V OUTPUT AT 3.2A, f
Load Transient Response Forced Continuous Mode
V
SG
2V/DIV
V
RSNS
100mV/DIV
V
OUT
50mV/DIV
3.3V TO 1.8V
IN OUT
LOADSTEP 0.6A TO 2.4A 1A/µs
CISPR25 Conducted Emissions with Class 5 Peak Limits (Voltage Method)
60
50
40
30
20
10
0
–10
–20
0 10 20 30
DC3054A–B DEMO BOARD
(WITH EMI FILTER INSTALLED)
3.3V INPUT TO 1.8V OUTPUT AT 3.2A, f
CLASS 5 PEAK LIMIT
MEASURED DATA
AMBIENT NOISE
500 600 700 800 900
dc3054a-b G02
= 6.6MHz
SW
dc3054ab G04
10µs/DIV
CLASS 5 PEAK LIMIT
MEASURED DATA
AMBIENT NOISE
40 50 60 70 80 90
FREQUENCY (MHz)
= 6.6MHz
SW
Radiated EMI Performance (CISPR25 Radiated
Emissions Test with Class 5 Peak Limits)
60
VERTICAL POLARIZATION
50
40
30
20
10
0
–10
–20
0 100 200
1000
DC3054A–B DEMO BOARD
(WITH EMI FILTER INSTALLED)
3.3V INPUT TO 1.8V OUTPUT AT 3.2A, f
LTC3308B Load Regulation
1.805
V
IN
1.804
V
OUT
FORCED CONTINUOUS MODE
1.803
1.802
1.801
1.800
1.799
1.798
1.797
1.796
1.795
0.0 0.5
DEMO MANUAL
DC3054A-B
100 110
dc3054a-b G01
CLASS 5 PEAK LIMIT
MEASURED DATA
AMBIENT NOISE
300 400 500 600 700
FREQUENCY (MHz)
= 6.6MHz
SW
= 3.3V
= 1.8V
1.0 1.5 2.0 2.5 3.0 3.5
I (A)
OUT
dc3054ab G05
800 900 1000
dc3054a-b G03
4.0
Rev. 0
3