NCS1 Series

Isolated 1W 4:1 Input Single Output DC/DC Converters

KDC_NCS1.A02 Page 1 of 8

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SELECTION GUIDE

Order Code

Input

Voltage

Output

Voltage

Output

Current

Efficiency

5V or 24V Input.

Efficiency

12V Input.

Ripple and Noise

Nom.

Min.

Typ.

Min.

Typ.

Typ.

Max.

V

V

mA

%

%

%

%

mVp/p mVp/p

pF

Hrs

NCS1S1203SC

12

3.3

303

73

77

71

75

24

70

24

NCS1S1205SC

12

5

200

76

79

74

77

25

50

30

NCS1S1212SC

12

12

83

75

78

75

79

40

120

35

NCS1S2403SC

24

3.3

303

76

78.5

73

76

35

70

28

NCS1S2405SC

24

5

200

79

82

77

80

27

50

42

NCS1S2412SC

24

12

83

80

83

77

80

28

120

42

INPUT CHARACTERISTICS

Parameter

Conditions

Min.

Typ.

Max.

Units

Voltage range

12V input types

4.5

12

18

V

24V input types

9

24

36

Input current

NCS1S12XX

5V input voltage

0.26

A

12V input voltage

0.1

NCS1S24XX

12V input voltage

0.1

24V input voltage

0.05

Input ripple current

NCS1S12XX

5

30

mA p-p

NCS1S24XX

5

15

OUTPUT CHARACTERISTICS

Parameter

Conditions

Min.

Typ.

Max.

Units

Rated power

All output types

1

W

Minimal load to meet datasheet specification

10

%

Voltage set point accuracy

All output types

±1

±2

%

Line regulation

Low line to high line

±0.5

%

Load regulation

All output types

0.5

%

Transient response

Peak deviation (12.5-37.5% & 37.5-12.5% swing)

5

Settling time

2ms

ISOLATION CHARACTERISTICS

Parameter

Conditions

Min.

Typ.

Max.

Units

Isolation test voltage

Flash tested for 1 minute

1000

VDC

Resistance

Viso = 1kVDC

1

GΩ

Parameter

Conditions

Min.

Typ.

Max.

Units

Switching frequency

100

400

kHz

Control pin input

Module on, pin unconnected or open collector floating

Module off

0.8

V

1 Calculated using MIL-HDBK-217 FN2, parts stress method with nominal input voltage at full load.

All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.

FEATURES

UL 60950 recognition pending

4:1 Wide range voltage input

Operating temperature range -40°C to

105°C with derating

1 kVDC Isolation

3.3V, 5V & 12V outputs

No electrolytic capacitors

Continuous short circuit protection

PRODUCT OVERVIEW

The NCS1 series of DC/DC converters offers a

single output voltage from input voltage ranges

of 4.5-18V and 9-36V. The NCS1 is housed in an

industry standard package with a standard pinout.

Applications include telecommunications, battery

powered systems, process control and distributed

power systems.