RDD Series

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2

DC-DC Converter

Input

Output

Characteristic

Minimum

Typical

Maximum

Units

Notes & Conditions

Output Voltage

3.3

15

VDC

See Models and Ratings table

Initial Set Accuracy

±1

%

At 70% load

Minimum Load

0%

Minimum load required to meet specification. Operation at

no load will not cause damage.

Line Regulation

±0.5

%

Load Regulation

±0.5

%

From 0% to full load

Cross Regulation

±5

%

On dual output models, when one output is at 25% load

and other is varied from no load to full load

Ripple & Noise

75

mV pk-pk

20 MHz bandwidth. Measured using 0.1 µF ceramic capacitor

Short Circuit Protection

Continuous hiccup mode, with auto recovery

Maximum Capacitive Load

See Models and Ratings table

Temperature Coefficient

0.02

%/ ˚C

Overload Protection

160

%

Of nominal output current

Overvoltage Protection

See Models and Ratings table

Remote On/Off

Output turns off if remote on/off (pin 1) is shorted to -Vin (pin 2,3)

Output is on if remote on/off (pin 1) is open or >3 V

Characteristic

Minimum

Typical

Maximum

Units

Notes & Conditions

Input Voltage Range

13

70

VDC

24 V nominal

42

176

VDC

110 V nominal

Input Filter

Pi type

Input Reflected Ripple Current

20

mA pk-pk

Through 12 µH inductor and 33 µF capacitor

Input Surge

100

VDC for 1000 ms 24 V models

185

VDC for 1000 ms 110 V models

General

Characteristic

Minimum

Typical

Maximum

Units

Notes & Conditions

Efficiency

80

86

%

See Models and Ratings table

Isolation: Input to Output

Input/Output to case

3000

VDC

1000

Switching Frequency

330/220

kHz

24 V / 110 V models

Isolation Resistance

Ω

Isolation Capacitance

1000

pF

Power Density

14

Mean Time Between Failure

800

kHrs

MIL-HDBK-217F, +25 °C GB

Weight

0.039 (18)

lb (g)

Environmental

Characteristic

Minimum

Typical

Maximum

Units

Notes & Conditions

Operating Temperature

-40

+85

°C

Derate from 100% load at +70 °C to 50% at +85 °C

Storage Temperature

-55

+125

°C

Case Temperature

+105

°C

Humidity

95

%RH

Non-condensing

Cooling

Natural convection

Safety Approvals

Safety Agency

Safety Standard

EN

EN50551

Railway Applications