Datasheet

NCS1 Series
Isolated 1W 4:1 Input Single Output DC/DC Converters
KDC_NCS1.D01 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
Isolation
Capacitance
MTTF
1
Nom. Min. Typ. Min. Typ. Typ. Max.
V V mA % % % % mVp/p mVp/p pF kHrs
NCS1S1203SC 12 3.3 303 73 77 71 75 24 70 24 1020
NCS1S1205SC 12 5 200 76 79 74 77 25 50 30 915
NCS1S1212SC 12 12 83 75 78 75 79 40 120 35 1130
NCS1S2403SC 24 3.3 303 76 78.5 73 76 35 70 28 1217
NCS1S2405SC 24 5 200 79 82 77 80 27 50 42 1022
NCS1S2412SC 24 12 83 80 83 77 80 28 120 42 943
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 reflected 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 %V
out
Settling time
(within 5% V
out
Nom.)
2ms
ISOLATION CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Isolation test voltage Flash tested for 1 second 1000 VDC
Resistance Viso = 1kVDC 1 GΩ
GENERAL CHARACTERISTICS
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 recognised
4:1 Wide range voltage input
Operating temperature range -40°C to
105°C with derating
1kVDC Isolation “Hi Pot Test”
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.

Summary of content (8 pages)