MGA SERIES
5 WATT
Positive
Input
DC/DC C
ONVERTERS
DIAGRAMS AND CONNECTIONS
Positive
Output
+
Inhibit
PWM
Control
Error
Amp VR
Output
Common
+
Input
Common
Case
Ground
Isolated
Feedback
= Dual Output
Negative
Output
F
IGURE
1: B
LOCK
D
IAGRAM
MGA
Positive
Input
12 k
5k
F
IGURE
2: I
NHIBIT
I
NTERFACE
200 pF
10 K
Inhibit
400
50 k
2N3904
10V
Vcc
10 k
3.9 K
Input
Common
EMI Filter
Positive
Input
Input
Common
Positive
Output
MGA2815S
T1
C2
+
C3 To Load
From input
power source
Positive
Positive
Input
Output
Case
Output Common
Input
Output
Common
Common
Case
C1
T1
F
IGURE
3: L
OW
N
OISE
O
UTPUT
F
ILTER
MGA S
INGLE
O
UTPUT
M
ODEL
EMI Filter
Positive
Input
Positive
Output
MGA2815D
T1
C2
C4
+ C
3
+ C To Loads
5
From input
power source
Positive
Positive
Input
Output
Case
Output Common
Input
Output
Input
Negative
Common
Common Common
Output
Case
C1
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,
m = 5000
Dual output: T2 = 10T #28 AWG winding on toroid,
m = 5000
T2
F
IGURE
4: L
OW
N
OISE
O
UTPUT
F
ILTER
MGA D
UAL
O
UTPUT
M
ODEL
B2-84
CRANE [ Crane Aerospace & Electronics. ]
