SMSA SERIES
5 WATT
DC/DC CONVERTERS
EMI Filter
SMSA2815S
T
1
Positive
Input
Positive
Output
Positive
Input
Positive
Output
+
To Load
C
C
From input
power source
2
3
Case
Output Common
Input
Common
Input
Common
Output
Common
Case
T
1
C
1
FIGURE 3: LOW NOISE OUTPUT FILTER FOR S MSA SINGLE OUTPUT MODEL
EMI Filter
SMSA2815D
T
1
Positive
Positive
Output
Positive
Positive
Output
Input
Input
+
C
C
C
From input
power source
2
Case
3
To Loads
+
Output Common
C
5
4
Input
Common
Input
Common
Output
Common
Negative
Output
Case
T
1
C
1
FIGURE 4: LOW NOISE OUTPUT FILTER FOR SMSA DUAL OUTPUT MODEL
The filter suggestions in Figures 3 and 4 will further reduce the
output ripple for systems requiring very low output noise.
C1 = 0.27 µF ceramic capacitor, 500V
C2 = C4 = 6.8 µF tantalum capacitor
C3 = C5 = 0.27 µF ceramic capacitor
Single output: T1 = 15T #28 AWG winding on toroid, µ = 5000
i
Dual output: T2 = 10T #28 AWG winding on toroid, µ = 5000
i
For best results, make interconnections as short as possible.
5
CRANE [ Crane Aerospace & Electronics. ]
