DCH0505S Datasheet, PDF (1/4 Pages) Crane Aerospace & Electronics. – DC/DC CONVERTERS 5 OR 28 VOLT INPUT

DC/DC CONVERTERS
5 OR 28 VOLT INPUT
Features
NOT RECOMMENDED FOR NEW DESIGNS
• –55°C to 100°C
• 5 or 28 VDC input
• Fully isolated
• Output regulated from input side
• 100 kHz typical switching frequency
• Topology – Push-Pull DC/DC Converter
• Up to 75% efficiency
• No minimum load
• Output capacitor suggested
DCH SERIES
3 WATT
MODELS
VDC OUTPUT
SINGLES
5
12
DUALS
±12
±15
Size (max.):
0.975 x 0.800 x 0.350 inches (24.77 x 20.32 x 8.89 mm)
See case A3 for dimensions.
Weight:
20 grams typical
Screening:
Standard or ES. See “100°C Non-QML Products
– Environmental Screening (Standard & ES)” screening table for
screening options.
DESCRIPTION
The DCH Series™ offers isolated, unregulated DC/DC converters ^{Figure 1 shows a standard connection scheme for a dual output}
with up to 3 watts of output power in a low profile (0.350 max.) metal ^{model. Users may also elect to use a dual output device to provide a}
package. Single and dual output models are available with input volt- ^{single output at double the rated output voltage. The double voltage}
ages of 5 or 28 VDC. DCH Series converters operate over a –55°C to ^{connection is achieved by leaving the normal output common pin (Pin}
+100°C temperature range.
15) unconnected and using either the positive or negative Vout pin for
the output common connection.
DCH Series converters use a non-saturating core circuit operating at
a frequency of approximately 100 kHz, which reduces reflected input
ripple and minimizes EMI/RFI problems. For applications requiring
MIL-STD-461C, CEO3, reflected input ripple levels, refer to Section B5
or contact your Interpoint representative for matching EMI filters.
On all DCH Series models, a tantalum capacitor with a minimum
value of 22 μF and an appropriate voltage rating should be connected
between the output common and the output line(s) to minimize output
ripple.
FIGURE 1:
DUAL DCH CONVERTER ^{28 V}
WITH EXTERNAL CAPACITORS
Positive
Input
Positive
Output
Output Common
Input
Common
Negative
Output
+ _Load
+ _Load
Typical Performance Curves: 25°C Tc, nominal Vin
Efficiency
DCH2805S
FIGURE 2
Output Current vs Output Voltage
DCH2805S
FIGURE 3
1