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NCS12 Series
Isolated 12W 4:1 Input Single & Dual Output DC/DC Converters
FEATURES UL 60950 recognition pending 4:1 Wide range voltage input Operating temperature range -40°C to 85°C Typical load regulation from 0.05% 1.5kVDC Isolation ‘Hi Pot Test’ 3.3V, 5V, 12V & 15V outputs UL 94V-0 Package materials No electrolytic capacitors Thermal shutdown Under voltage lock out Current fold back
PRODUCT OVERVIEW
The NCS12 series of DC/DC converters offers single & dual output voltages from input voltage ranges of 9-36V and 18-75V. The NCS12 is housed in an industry standard package with a standard pinout. The NCS12 is packaged in a metal case for improved EMI shielding and is also encapsulated for superior thermal performance. Applications include telecommunications, battery powered systems, process control and distributed power systems.
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SELECTION GUIDE
Order Code
NCS12S1203C NCS12S1205C NCS12S1212C NCS12S1215C NCS12S4803C NCS12S4805C NCS12S4812C NCS12S4815C NCS12D1205C NCS12D1212C NCS12D1215C NCS12D4805C NCS12D4812C NCS12D4815C
Input Voltage
Nom. V 12 12 12 12 48 48 48 48 12 12 12 48 48 48
Output Voltage
V 3.3 5 12 15 3.3 5 12 15 ±5 ±12 ±15 ±5 ±12 ±15
Output Current
A 3.64 2.40 1.00 0.80 3.64 2.40 1.00 0.80 ±1.2 ±0.5 ±0.4 ±1.2 ±0.5 ±0.4
Load Regulation
Positive Negative Positive Negative
Output Output Output Output
Typical
Max
% %%
1 1.5
0.5 1
0.1 0.3 0.1 0.3 1.2 2
0.5 1
0.1 0.3
0.1 0.3
0.15 0.3 0.3
2
0.05 0.2 0.3 1.5
0.05 0.1 0.3 1.5
0.15 0.5 0.3
2
0.05 0.4 0.3 1.5
0.05 0.4 0.3 1.5
Efficiency MTTF1
Min. Typ. % % Hrs 78 83.5 269,492 84 88 313,578 83 84.5 230,569 83 85.5 195,596 81 85.5 341,943 84 87.5 418,117 82 84.5 296,593 84 85 259,485 80 81.5 182,655 83 85 158,750 84 86 140,435 78 80 165,931 83 85 215,533 83 85 146,257
SELECTION GUIDE (Continued)
Order Code
NCS12S1203C NCS12S1205C NCS12S1212C NCS12S1215C NCS12S4803C NCS12S4805C NCS12S4812C NCS12S4815C NCS12D1205C NCS12D1212C NCS12D1215C NCS12D4805C NCS12D4812C NCS12D4815C
10% Load Typ. 12/48V
A 0.15 0.1 0.1 0.06 0.05 0.05 0.03 0.03 0.04 0.04 0.05 0.03 0.03 0.03
Input Current 10% Load Typ. 24V A 0.1 0.16 0.06 0.1 0.08 0.08 0.06 0.06 0.07 0.07 0.07 0.07 0.07 0.07
100% Load Typ. 12/48V
A 1.2 1.1 1.2 1.2 0.3 0.3 0.3 0.3 1.25 1.2 1.5 0.3 0.3 0.4
Ripple and Noise
Typ. mVp/p
60 50 80 100 100 90 75 90 35 40 55 70 84 55
Max mVp/p
125 125 125 125 125 125 125 125 100 100 100 100 100 100
INPUT CHARACTERISTICS
Parameter
Conditions
Voltage range
12V input types 48V input types
Turn on threshold 12V input types
Under voltage lock out
Turn off threshold 12V input types Turn on threshold 48V input types
Turn off threshold 48V input types
Power consumption at NCS12X12
shutdown
NCS12X48
Reflected ripple current
48V dual output types All other types
Min. Typ. 9 24 18 48 8.5 7.5 16.7 15.8 10 100 15 10
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.
Max. 36 75
Units V
V
mW mA p-p
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NCS12 Series
Isolated 12W 4:1 Input Single & Dual Output DC/DC Converters
OUTPUT CHARACTERISTICS
Parameter
Conditions
Rated power
All output types
Minimal load to meet datasheet specification
Positive outputs Voltage set point accuracy
Negative outputs
Line regulation
Low line to high line
Positive outputs Negative outputs
Cross Regulation
D1205 & D4805 D1212, D1215 ,D4812, D4815
Peak deviation (12.5-37.5% & 37.5-12.5% swing)
Transient response
Settling time (within 1% Vout Nom.)
Single output types Dual output types
ISOLATION CHARACTERISTICS
Parameter
Conditions
Isolation test voltage
Flash tested for 1 seconds
Resistance
Viso = 1kVDC
Capacitance
S1203, S1205, S4803, S4805 All other types
Min. 1500
1
ABSOLUTE MAXIMUM RATINGS Short-circuit protection (for SELV input voltages) Control pin input voltage Lead temperature 1.0mm from case for 10 seconds (to JEDEC JESD22-B106 ISS C) Input voltage, NCS12 12V input types Input voltage, NCS12 48V input types
Min. 10
Typ.
0.04 0.3 ±4 ±2 500 250
Typ.
600 230
Max. Units 12 W
% ±2 ±3 % 0.1
% 1 ±6.5
% ±5 5 %Vout
μs
Max. Units VDC GΩ
pF
30 minutes 18V Max 260°C 40V 80V
GENERAL CHARACTERISTICS1 Parameter Switching frequency
Control pin input
TEMPERATURE CHARACTERISTICS Parameter Operation Storage
Case temperature above ambient
Thermal shutdown
Conditions S1203, S1205, S4803 & S4805 All other types Module on, pin unconnected or open collector floating Module off
Min. Typ. Max. Units 340 kHz 220
0.8 V
Conditions With derating - see derating graph
100% Load, Nom VIN, Still Air
Case Temperature
NCS12S1203C NCS12S1215C, NCS12D1205C, NCS12D4805C All other types Single 3.3V & 5V outputs All other types
Min. Typ. Max. Units -40 85 -50 125
65 60 °C 44 135 120
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