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DCH Datasheet

DC/DC CONVERTERS 5/ 12/ OR 28 VOLT INPUT

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DCH pdf
FEATURES
• –55°C to 100°C
• 4 to 6.5, 9 to 15, or
20 to 32 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
DC/DC CONVERTERS
5, 12, OR 28 VOLT INPUT
Size (max.): 0.975 x 0.800 x 0.350 inches (24.77 x 20.32 x 8.89 mm)
See section B8, case A3, for dimensions.
Weight: 20 grams typical
Screening: Standard or ES. See Section C2 for screening options,
see Section A5 for ordering information.
DCH SERIES
3 WATT
MODELS
VDC OUTPUT
SINGLES
5
12
28
DUALS
±12
±15
±28
DESCRIPTION
The DCH Series™ offers isolated, unregulated DC/DC converters
with up to 3 watts of output power in a low profile (0.350 max.) metal
package. Single and dual output models are available with input
voltages of 5, 12, or 28 VDC. DCH Series converters operate over
a –55°C to +100°C temperature range.
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.
Figure 1 shows a standard connection scheme for a dual output
model. Users may also elect to use a dual output device to provide
a single output at double the rated output voltage. The double
voltage connection is achieved by leaving the normal output
common pin (Pin 15) unconnected and using either the positive or
negative Vout pin for the output common connection.
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
Efficiency
DCH1215D
FIGURE 4
Output Current vs Output Voltage
DCH1215D
FIGURE 5
B4-31



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DCH Datasheet

DC/DC CONVERTERS 5/ 12/ OR 28 VOLT INPUT

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DCH pdf
DCH SERIES
3 WATT
DC/DC CONVERTERS
ABSOLUTE MAXIMUM RATING
Output Power
• 3 watts
Lead Soldering Temperature (10 sec per lead)
• 300°C
Storage Temperature Range (Case)
• –55°C to +125°C
RECOMMENDED OPERATING CONDITION
Input Voltage Range (VDC)
• 5 volt input models 4.0 to 6.5
• 12 volt input models 9.0 to 15.0
• 28 volt input models 20.0 to 32.0
Case Operating Temperature (Tc)
• –55°C to +100°C full power
TYPICAL CHARACTERISTIC
Output Voltage Tolerance (Full Load)
• 5 volt output models ±0.25
• 12 volt output models ±0.4
• 15 volt output models ±0.5
• 28 volt output models ±0.6
Line Regulation
• Output is directly proportional to input voltage.
Output Voltage Temperature Coefficient
• 0.02%/°C maximum
Converter Frequency
• 100 kHz typical
Isolation
• 100 megohm minimum at 500 V
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
OUTPUT
OUTPUT
LOAD
MODEL
NUMBER
INPUT
VOLTAGE
OUTPUT
VOLTAGE 1
CURRENT
TC = –55°C
POWER
TC = –55°C
EFFICIENCY
FULL LOAD
REGULATION
50% TO
TO +100°C
TO +100°C
FULL LOAD
NOMINAL
NOMINAL
MAX
MAX
MIN
TYP
VDC
VDC
mA
W
%
mV
DCH0505S
5
5 400 2.0
67
470
DCH0512S
5
12 208 2.5
72
830
DCH0512D
5
±12
±104
2.5
72
830
DCH0515D
5
±15 ±83 2.5
72
830
DCH1205S
12
5 500 2.5
70
500
DCH1212S
12
12 250 3.0
72
440
DCH1228S
12
28 107 3.0
75
870
DCH1212D
12
±12
±125
3.0
72
440
DCH1215D
12
±15
±100
3.0
72
440
DCH1228D
12
±28 ±53 3.0
75
870
DCH2805S
28
5 500 2.5
68
450
DCH2812S
28
12 250 3.0
75
375
DCH2812D
28
±12
±125
3.0
75
375
DCH2815D
28
±15
±100
3.0
75
375
Notes
1. Nominal output voltage is correct only for nominal input voltage. Output voltage changes in proportion to input voltage.
2. Output ripple results require the connection of a tantalum capacitor (22 µF minimum) across each output.
INPUT
CURRENT2
10% LOAD
MAX
mA
220
250
250
250
110
70
110
110
110
110
50
50
50
50
OUTPUT
RIPPLE2
MAX
mVp-p
300
200
100
100
300
200
300
100
100
200
300
200
100
100
PIN OUT
Pin Designation
1 Positive Input
2 No Connection
3 Input Common
8 No Connection
9 Case
14 Negative Output1
15 Output Common1
16 Positive Output
Dot on top of cover
indicates pin one.
123
8
BOTTOM VIEW
DCH
16 15 14
9
Note
1. Pins 14 and 15 are connected
internally on single output
models.
See Section B8, case A3, for dimensions
FIGURE 6: PIN OUT
MODEL NUMBERING KEY
Base Model
DCH 28 12 D / ES
Input Voltage
Output Voltage
Number of Outputs
(S = single, D = dual)
Screening
(Standard screening has no designator
in this position.)
B4-32
24600-001-DTS Rev A
DQ# 1024
All technical information is believed to be accurate, but no responsibility is
assumed for errors or omissions. Interpoint reserves the right to make changes in
products or specifications without notice. DCH Series is a trademark of Interpoint.
Copyright © 1991 - 1999 Interpoint. All rights reserved.


Part Number DCH
Description DC/DC CONVERTERS 5/ 12/ OR 28 VOLT INPUT
Maker ETC
Total Page 4 Pages
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