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10 Watt-Family
DC-DC Converters <40 W
Rugged Environment
6 - 36
Edition 2/96 - Melcher AG
MELCHER
The Power Partners.
6.1
Functional Description and Block Diagrams
These converters are primary controlled single transistor
forward converters using Pulse With Modulation (PWM).
The output voltage is fed back to the primary control circuit
via a signal transformer. The second output voltage regula-
tion relies on the close magnetic coupling of the output
inductor together with the circuit symmetry. Therefore out-
put 2 should have the same (%) load condition as output 1
to comply with the specified data. The current limitation is
located on the primary side, limiting the total output current.
PWM
Go
Vo
Vi
Gi
SD
Cio
PWM
–Vo
Go
+Vo
Vi
Gi
SD
Cio
Fig. 2
Group 01, single output
Fig. 3
Group 02, dual output
Mechanical Data
Dimensions in mm. Tolerances
±0.2 mm, unless otherwise specified.
European
Projection
Fig. 4
2"
×2" metal case, single output without shutdown
Pin configuration C, available for IPS and IPW-types
Fig. 5
2"
×2" metal case, dual output without shutdown
Pin configuration C, available for IPS and IPW-types
10.5
min. 5
1
51.3
23.2 ±0.5
20.3
15.5 ±0.5
Go
Vo
Bottom view
Output
51.3
5.1
Input
20.3
Vi
Gi
C
15.5 ±0.5
10.5
min. 5
1
51.3
23.2 ±0.5
15.5 ±0.5
–Vo
+Vo
Bottom view
Output
51.3
5.1
Input
20.3
10.210.2
Gi Vi
Go
C
15.5 ±0.5
Fig. 6
Plastic case, single output without shutdown
Pin configuration C, available for IPZ-types
Fig. 7
Plastic case, dual output without shutdown
Pin configuration C, available for IPZ-types
10.5
min. 5
1
50.8
23 ±0.5
20.3
15.3 ±0.5
Go
Vo
Bottom view
10
3
±0.5
9
±0.5
+0.0
-0.2
Output
50.8
5.1
Input
20.3
Vi
Gi
C
15.3 ±0.5
10.5
min. 5
1
50.8
23 ±0.5
15.3 ±0.5
–Vo
+Vo
Bottom view
10
3
±0.5
9
±0.5
+0.0
-0.2
Output
50.8
5.1
Input
20.3
10.210.2
Gi Vi
Go
C
15.3 ±0.5