DC/DC C
ONVERTERS
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
DCH SERIES
3 WATT
TYPICAL CHARACTERISTICS
Output Voltage Tolerance (Full Load)
• 5 volt output models ±0.25
• 15 volt output models ±0.5
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
RECOMMENDED OPERATING CONDITION
Input Voltage Range (VDC)
• 5 volt input models
4.0 to 6.5
• 28 volt input models
20.0 to 32.0
Case Operating Temperature (Tc)
• –55°C to +100°C full power
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
INPUT
VOLTAGE
OUTPUT
VOLTAGE
OUTPUT
CURRENT
NOMINAL VDC
TC = -55°C TO
+100°C MAX
OUTPUT
CURRENT
NOMINAL VDC
TC = -55°C TO
+100°C MAX
EFFICIENCY
FULL LOAD
MODEL
NUMBER
DCH0505S
DCH0512S
DCH0512D
DCH0515D
DCH2805S
DCH2812S
DCH2812D
DCH2815D
NOMINAL
VDC
5
5
5
5
28
28
28
28
NOMINAL
VDC
5
12
±12
±15
5
12
±12
±15
mA
400
208
±104
±83
500
250
±125
±100
W
2.0
2.5
2.5
2.5
2.5
3.0
3.0
3.0
MIN
%
67
72
72
72
68
75
75
75
LOAD
REGULATION
50% TO FULL
LOAD
TYP
mV
470
830
830
830
450
375
375
375
INPUT
CURRENT
2
10% LOAD
MAX
mA
220
250
250
250
50
50
50
50
OUTPUT
RIPPLE
MAX
mV-pp
300
200
100
100
300
200
100
100
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.
PIN OUT
Pin
1
2
3
8
9
14
15
16
Designation
Positive Input
No Connection
Input Common
No Connection
Case
Negative Output
1
Output Common
1
Positive Output
Dot on top of cover
indicates pin one.
MODEL NUMBERING KEY
DCH
1 2 3
8
28 12
D / ES
Base Model
Input Voltage
Output Voltage
Number of Outputs
(S = single, D = dual)
Screening
(Standard screening has no designator
in this position.)
BOTTOM VIEW
DCH
16 15 14
9
Note
1. Pins 14 and 15 are connected inter-
nally on single output models.
See case A3 for dimensions
F
IGURE
6: P
IN
O
UT
2
CRANE [ Crane Aerospace & Electronics. ]
