NCS1S2412SC [MURATA]
民用设备,工业设备;
| 型号： | NCS1S2412SC |
| 厂家： | 
muRata |
| 描述： | 民用设备,工业设备 |
| 文件： | 总8页 (文件大小：187K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
NCS1 Series
s
Isolated 1W 4:1 Input Single Output DC/DC Converters
SELECTION GUIDE
Efficiency
5V or 24V Input.
Efficiency
12V Input.
Input
Voltage
Ripple and Noise
MTTF1
Output
Voltage
Output
Current
Order Code
Nom.
V
Min.
%
Typ.
%
77
Min.
%
Typ.
%
Typ.
mVp/p mVp/p
Max.
V
3.3
5
mA
303
200
83
pF
24
30
35
28
42
42
kHrs
1020
915
NCS1S1203SC
NCS1S1205SC
NCS1S1212SC
NCS1S2403SC
NCS1S2405SC
NCS1S2412SC
12
12
12
24
24
24
73
76
75
76
79
80
71
74
75
73
77
77
75
77
79
76
80
80
24
25
40
35
27
28
70
50
79
12
3.3
5
78
120
70
1130
1217
1022
943
303
200
83
78.5
82
50
12
83
120
FEATURES
INPUT CHARACTERISTICS
ꢀ
UL 60950 recognised
Parameter
Conditions
Min.
4.5
9
Typ.
Max.
18
Units
V
ꢀ4:1 Wide range voltage input
12V input types
24V input types
12
24
Voltage range
36
ꢀOperating temperature range -40°C to
5V input voltage
12V input voltage
12V input voltage
24V input voltage
0.26
0.1
0.1
0.05
5
105°C with derating
NCS1S12XX
NCS1S24XX
Input current
A
ꢀ1kVDC Isolation “Hi Pot Test”
ꢀ3.3V, 5V & 12V outputs
NCS1S12XX
NCS1S24XX
30
15
Input reflected ripple
current
ꢀNo electrolytic capacitors
ꢀContinuous short circuit protection
mA p-p
5
OUTPUT CHARACTERISTICS
Parameter
Rated power
Conditions
All output types
Min.
10
Typ.
Max. Units
PRODUCT OVERVIEW
1
W
%
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.
Minimal load to meet datasheet specification
Voltage set point accuracy All output types
1
2
%
Line regulation
Load regulation
Low line to high line
All output types
0.5
0.5
%
%
Peak deviation (12.5-37.5% & 37.5-12.5% swing)
Settling time
(within 5% Vout Nom.)
5
%Vout
Applications include telecommunications, battery
powered systems, process control and distributed
power systems.
Transient response
2
ms
ISOLATION CHARACTERISTICS
Parameter
Isolation test voltage
Resistance
Conditions
Flash tested for 1 second
Viso = 1kVDC
Min.
1000
1
Typ.
Typ.
Max.
Units
VDC
GΩ
GENERAL CHARACTERISTICS
Parameter
Switching frequency
Conditions
Min.
100
Max. Units
400
kHz
Module on, pin unconnected or open collector floating
Module off
Control pin input
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.
For full details go to
www.murata-ps.com/rohs
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KDC_NCS1.D01 Page 1 of 8
NCS1 Series
Isolated 1W 4:1 Input Single Output DC/DC Converters
TEMPERATURE CHARACTERISTICS
Parameter
Operation
Conditions
Min.
-40
Typ.
15
Max.
105
125
22
Units
°C
Storage
-50
Case temperature rise above ambient
100% Load, Nom VIN, Still Air
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection (for SELV input voltages)
Control pin input voltage
Continuous
18V Max
260°C
25V
Lead temperature 1.0mm from case for 10 seconds (to JEDEC JESD22-B106 ISS C)
Input voltage, NCS1 12V input types
Input voltage, NCS1 24V input types
40V
APPLICATION NOTES
Maximum Output Capacitance
Maximum output capacitance should not exceed:
Output Voltage
Maximum Load Capacitance
V
3.3
5
μF
470
470
220
12
Start-up times
Typical start up times for this series, with a typical input voltage rise time of 2.2ꢁs and output capacitance of 10ꢁF, are shown in the table below. The product series will
start into the maximum output capacitance with increased start times.
Start-up times
Part No.
ms
NCS1S1203SC
NCS1S1205SC
NCS1S1212SC
NCS1S2403SC
NCS1S2405SC
NCS1S2412SC
6
9
20
12
7
12
Control Pin
The NCS1 converters have a shutdown feature which enables the user to put the converter into a low power state. The control pin connects directly to the base of an internal
transistor, and the switch off mechanism for the NCS1 works by forward biasing this NPN transistor. If the pin is left open (high impedance), the converter will be ON (there is
no allowed low state for this pin), but once a control voltage is applied with sufficient drive current, the converter will be switched OFF. A suitable application circuit is shown
below.
D1 (e.g. 1N4003) is required to provide high impedence when the signal is
low. From the NCS1 specification, the drive current to operate this function is
recommended to be 3mA, and hence the value of R1 can be derived as follows:
NCS1
VIN
R2
Q1
VC - VD - VQ
R1 =
IC
R1
VC
OV
-VIN
D1
CTRL
Assuming VC=5V, VD=0.7V and VQ=1V:
5 - 0.7 - 1.0
R1=
= 1100ꢀ
3 x 10-3
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KDC_NCS1.D01 Page 2 of 8
NCS1 Series
Isolated 1W 4:1 Input Single Output DC/DC Converters
TECHNICAL NOTES
ISOLATION VOLTAGE
‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Voltage’, ‘Dielectric Withstand Voltage’ & ‘Isolation Test Voltage’ are all terms that relate to the same thing, a test voltage,
applied for a specified time, across a component designed to provide electrical isolation, to verify the integrity of that isolation.
Murata Power Solutions NCS1 series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 1kVDC for 1 second.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
The NCS1 has been recognized by Underwriters Laboratory for functional insulation, both input and output should normally be maintained within SELV limits i.e. less than 42.4V
peak, or 60VDC. The isolation test voltage represents a measure of immunity to transient voltages and the part should never be used as an element of a safety isolation system.
The part could be expected to function correctly with several hundred volts offset applied continuously across the isolation barrier; but then the circuitry on both sides of the barrier
must be regarded as operating at an unsafe voltage and further isolation/insulation systems must form a barrier between these circuits and any user-accessible circuitry according
to safety standard requirements.
REPEATED HIGH-VOLTAGE ISOLATION TESTING
It is well known that repeated high-voltage isolation testing of a barrier component can actually degrade isolation capability, to a lesser or greater degree depending on materials,
construction and environment. The NCS1 series has toroidal isolation transformers, with no additional insulation between primary and secondary windings of enameled wire. While
parts can be expected to withstand several times the stated test voltage, the isolation capability does depend on the wire insulation. Any material, including this enamel (typically
polyurethane) is susceptible to eventual chemical degradation when subject to very high applied voltages thus implying that the number of tests should be strictly limited. We
therefore strongly advise against repeated high voltage isolation testing, but if it is absolutely required, that the voltage be reduced by 20% from specified test voltage.
This consideration equally applies to agency recognized parts rated for better than functional isolation where the wire enamel insulation is always supplemented by a further
insulation system of physical spacing or barriers.
SAFETY APPROVAL
The NCS1 series has been recognized by Underwriters Laboratory (UL) to UL 60950 for functional insulation to a maximum case temperature of 105°C. File number E151252
applies.
The NCS1 Series of converters are not internally fused so to meet the requirements of UL 60950 an anti-surge input line fuse should always be used with ratings as defined below.
NCS1S12xxSC: 1A
NCS1S24xxSC: 0.5A
All fuses should be UL approved and rated to at least the maximum allowable DC input voltage.
RoHS COMPLIANCE INFORMATION
This series is compatible with RoHS soldering systems with a peak wave solder temperature of 260ºC for 10 seconds. The pin termination finish
on this product series is Tin Plate, Hot Dipped over Matte Tin with Nickel Preplate. The series is backward compatible with Sn/Pb soldering
systems.
CHARACTERISATION TEST METHODS
Ripple & Noise Characterisation Method
Ripple and noise measurements are performed with the following test configuration.
C1
C2
1ꢁF X7R multilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC/DC converter
10ꢁF tantalum capacitor, voltage rating to be a minimum of 1.5 times the output voltage of the DC/DC converter with an ESR of less
than 100mꢀ at 100 kHz
C3
R1
100nF multilayer ceramic capacitor, general purpose
450ꢀ resistor, carbon film, 1% tolerance
R2
50ꢀ BNC termination
T1
3T of the coax cable through a ferrite toroid
RLOAD
Resistive load to the maximum power rating of the DC/DC converter. Connections should be made via twisted wires
Measured values are multiplied by 10 to obtain the specified values.
Differential Mode Noise Test Schematic
DC/DC Converter
OSCILLOSCOPE
Y INPUT
R2
C1 C2 C3
R1
T1
+
+
Input
Output
SUPPLY
-
-
R LOAD
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KDC_NCS1.D01 Page 3 of 8
NCS1 Series
Isolated 1W 4:1 Input Single Output DC/DC Converters
EFFICIENCY VS LOAD
NCS1S1203SC
NCS1S1205SC
90
80
70
60
50
40
30
20
10
0
80
70
60
50
40
30
20
10
0
4.5 Vin
Vin
4.5 Vin
5 Vin
5
12 Vin
18 Vin
12 Vin
18 Vin
0
10
20
30
40
50
60
70
80
90
100
0
10
20
30
40
50
60
70
80
90
100
Load (%)
Load (%)
NCS1S1212SC
NCS1S2403SC
90
90
80
70
60
50
40
30
20
10
0
80
70
60
50
40
30
20
10
0
9 Vin
4.5 Vin
12 Vin
24 Vin
36 Vin
5
Vin
12 Vin
18 Vin
0
10
20
30
40
50
60
70
80
90
100
0
10
20
30
40
50
60
70
80
90
100
Load (%)
Load (%)
NCS1S2405SC
NCS1S2412SC
90
90
80
70
60
50
40
30
20
10
0
80
70
60
50
40
30
20
10
0
9 Vin
9 Vin
12 Vin
24 Vin
36 Vin
12 Vin
24 Vin
36 Vin
0
10
20
30
40
50
60
70
80
90
100
0
10
20
30
40
50
60
70
80
90
100
Load (%)
Load (%)
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KDC_NCS1.D01 Page 4 of 8
NCS1 Series
Isolated 1W 4:1 Input Single Output DC/DC Converters
TEMPERATURE DERATING
NCS1S1203SC
NCS1S1205SC
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
still air
still air
100 lfm
200 lfm
400 lfm
100 lfm
200 lfm
400 lfm
70
80
90
100
110
80
90
100
110
Ambient Temperature OC
Ambient Temperature OC
NCS1S1212SC
NCS1S2403SC
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
still air
100 lfm
200 lfm
400 lfm
still air
100 LFM
200 LFM
400 LFM
0%
80
0%
70
90
100
110
75
80
85
90
95
100
105
Ambient Temperature OC
Ambient Temperature OC
NCS1S2405SC
NCS1S2412SC
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
still air
still air
100 LFM
200 LFM
400 LFM
100 lfm
200 lfm
400 lfm
0%
70
0%
80
80
90
100
110
90
100
110
Ambient Temperature OC
Ambient Temperature OC
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KDC_NCS1.D01 Page 5 of 8
NCS1 Series
Isolated 1W 4:1 Input Single Output DC/DC Converters
EMC FILTERING AND SPECTRA
FILTERING
The module includes a basic level of filtering, the following table shows the additional input capacitor and input inductor typically required to meet EN 55022 Curve A
Quasi-Peak EMC limit, as shown in the following plots.
Part Number
Capacitor
Inductor
Common Mode Choke
NCS1S1203SC
NCS1S1205SC
NCS1S1212SC
NCS1S2403SC
NCS1S2405SC
NCS1S2412SC
330nF
330nF
2.2ꢁF
330nF
330nF
330nF
500ꢁH
500ꢁH
2.2mH
500ꢁH
500ꢁH
500ꢁH
700ꢁH
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KDC_NCS1.D01 Page 6 of 8
NCS1 Series
Isolated 1W 4:1 Input Single Output DC/DC Converters
EMC FILTERING AND SPECTRA
NCS1S1203SC
NCS1S1205SC
80
70
60
50
40
30
20
10
80
70
60
50
40
30
20
10
0
0
1.00E+05
1.00E+06
1.00E+07
1.00E+08
1.00E+08
1.00E+08
1.00E+05
1.00E+06
1.00E+07
1.00E+08
1.00E+08
1.00E+08
Frequency (Hz)
Frequency (Hz)
NCS1S1212SC
NCS1S2403SC
80
70
60
50
40
30
20
10
80
70
60
50
40
30
20
10
0
0
1.00E+05
1.00E+06
1.00E+07
1.00E+05
1.00E+06
1.00E+07
Frequency (Hz)
Frequency (Hz)
NCS1S2405SC
NCS1S2412SC
80
70
60
50
40
30
20
10
80
70
60
50
40
30
20
10
0
0
1.00E+05
1.00E+06
1.00E+07
1.00E+05
1.00E+06
1.00E+07
Frequency (Hz)
Frequency (Hz)
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KDC_NCS1.D01 Page 7 of 8
NCS1 Series
Isolated 1W 4:1 Input Single Output DC/DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
PIN CONNECTIONS
Function
Single
Pin
21.87 [0.861] MAX
1
2
3
6
7
-VIN
+VIN
Control
+VOUT
-VOUT
8.2 [0.323] MAX
TUBE OUTLINE DIMENSIONS
0.50 (0.0197)
NCS1S1205SC
XYYWW
11.30 [0.445] MAX
12.30 (0.484)
0.40 [0.016] MIN
0.75 (0.0295)
0.20 (0.0079)
4.10 0.50
[0.161 0.020]
5.00 (0.1969)
1 2 3
6 7
0.50 0.05
[0.020 0.002]
2.00 (0.0787)
2.00 (0.0787)
2.54 [0.100]
8.20
(0.3228)
15.24 [0.600]
All dimensions in millimetres 0.5 (inches 0.01).
Tube length: 520 2 (20.47 inches 0.079).
Quantity: 23
RECOMMENDED FOOTPRINT DETAILS
3.52 0.139
2.87 0.113
[ ]
2.54 [0.100]
0.25 0.05 [0 .010 0.002]
2.62 0.103
1.92
0.076
[
]
x6 HOLES
1.15
1.00
0.045
Ø
Ø
[
0.039
0.1
]
2.54 [0.100]
Weight: 3.3g
All dimensions in millimetres (inches) 0.5 (0.020) except pin to pin tolerance 0.25 (0.010).
All pins on a 2.54 (0.100) pitch and within 0.25 (0.010) of true position.
All dimensions in mm (inches) 0.25 ( 0.010).
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2015 Murata Power Solutions, Inc.
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KDC_NCS1.D01 Page 8 of 8
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