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NTF Series
Isolated 1W Wide Input DC/DC Converters
SELECTION GUIDE
Order Code
NTFS0505MC NTFS0512MC NTFS0515MC NTFS1205MC NTFS1212MC NTFS1215MC NTFS2405MC NTFS2412MC NTFS2415MC
Input Output Input Current Output Voltage Current Voltage Nominal 100% Load 0% Load Shutdown 100% Load V V mA mA A mA
5 5 5 12 12 12 24 24 24 5 12 15 5 12 15 5 12 15 200 83 66 200 83 66 200 83 66 25 30 60 10 12 15 6 8 9 72 55 80 70 34 33 96 48 50 320 300 320 110 130 120 120 60 60
Efficiency Min. %
60.5 63.5 60.5 68.0 65.0 65.0 65.0 65.0 65.0 62 67 63 73 66 67 70 68 67
MTTF kHrs
921 1118 869 1281 1175 1283 1379 1278 1223
Typ.
FEATURES
RoHS compliant Efficiency from 60.5% Wide temperature performance -40C to 85C UL 94V-0 Package material Lead frame technology 5V, 12V, & 24V Input 5V, 12V & 15V Output Internal SMD construction 1kVDC Isolation MTTF up to 1.4 million hours Power density 0.7W/cm3 Multi layer ceramic capacitors
INPUT CHARACTERISTICS
Parameter
Voltage range
Conditions
Continuous operation, 5V input types Continuous operation, 12V input types Continuous operation, 24V input types xx05 output types xx12 output types xx24 output types
Min.
4 9 18
Typ.
5 12 24 12 6 6
Max.
6 15 36
Units V
Reflected ripple current
mA p-p
OUTPUT CHARACTERISTICS
Parameter
Voltage set point accuracy Line regulation Load regulation Ripple & Noise Voltage trim range
Conditions
With external input/output capacitors Low line to high line, 10% load to 100% load, with external input/ output capacitors BW=DC to 20MHz, all output types
Min.
Typ.
1 0.2 0.1 100
Max.
2 1 1 150 +10
Units
% % % mV p-p %VOUT
PRODUCT DESCRIPTION
The NTF 1W series of surface mount DC/DC converters offer a tightly regulated output voltage in a true surface mount device, available with three 2:1 input voltage ranges of 4-6V, 9-15V and 18-36V. The NTF series' employs leadframe technology and transfer moulding techniques to bring all of the benefits of IC style packaging to hybrid circuitry. Co-planarity of the lead positions is based upon IEC 191-6:1990. The devices are suitable for all applications where high volume production is envisaged.
-10
GENERAL CHARACTERISTICS
Parameter
Switching frequency
Conditions
Min.
50
Typ.
Max.
700
Units
kHz
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection Lead temperature 1.5mm from case for 10 seconds Minimum load Input voltage VIN, NTF05 types Input voltage VIN, NTF12 types Input voltage VIN, NTF24 types 15s 245C See graph 10V 17.5V 40V
1 Calculated using MIL-HDBK-217F with nomial input voltage at full load (ground benign) at 25C. All specifications typical at TA=25C, nominal input voltage and rated output current unless otherwise specified.
For full details go to www.murata-ps.com/rohs
www.murata-ps.com
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_NTFC.A02 Page 1 of 8
NTF Series
Isolated 1W Wide Input DC/DC Converters
TEMPERATURE CHARACTERISTICS
Parameter
Operation Storage Cooling Case temperature rise above ambient
Conditions
See derating graphs Free air convection
Min.
-40 -50
Typ.
Max.
85 130
Units
30
C
ISOLATION CHARACTERISTICS
Parameter
Isolation test voltage Resistance Capacitance
Conditions
Flash tested for 1 second Viso= 500VDC
Min.
1000 1
Typ.
10 25
Max.
Units
VDC G pF
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 NTF 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?" For a part holding no specific agency approvals, such as the NTF series, 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 NTF 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.
www.murata-ps.com
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_NTFC.A02 Page 2 of 8
NTF Series
Isolated 1W Wide Input DC/DC Converters
TEMPERATURE DERATING NTFS0505
120
NTFS0512
120
Hi Vin
100 100
Hi Vin Nom Vin
80 80
Nom Vin
Maximum load (%)
Maximum load (%)
Lo Vin
60
60
Lo Vin
40
40
20
20
0 -40 -20 0 20 40 60 80
0 -40 -20 0 20 40 60 80
Temperature (C)
Temperature (C)
NTFS0515
120 Hi Vin 100 Nom Vin 80
NTFS1205
120
100
Hi Vin Nom Vin
80
Maximum load (%)
Lo Vin 60
Maximum load (%)
60
Lo Vin
40
40
20
20
0 -40 -20 0 20 40 60 80
0 -40 -20 0 20 40 60 80
Temperature (C)
Temperature (C)
NTFS1212
120
NTFS1215
120
Hi Vin Hi Vin
100 100
Nom Vin
80 80
Nom Vin
Maximum load (%)
Lo Vin
60
Maximum load (%)
60
Lo Vin
40
40
20
20
0 -40 -20 0 20 40 60 80
0 -40 -20 0 20 40 60 80
Temperature (C)
Temperature (C)
www.murata-ps.com
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_NTFC.A02 Page 3 of 8
NTF Series
Isolated 1W Wide Input DC/DC Converters
TEMPERATURE DERATING NTFS2405
120
NTFS2412
120
Hi Vin 100 Hi Vin 80 Nom Vin Nom Vin
80 100
Maximum load (%)
60 Lo Vin 40
Maximum load (%)
60
Lo Vin
40
20
20
0 -40 -20 0 20 40 60 80
0 -40 -20 0 20 40 60 80
Temperature (C)
Temperature (C)
NTFS2415
120
Hi Vin
100
Nom Vin
80
Maximum load (%)
60
Lo Vin
40
20
0 -40 -20 0 20 40 60 80
Temperature (C)
www.murata-ps.com
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_NTFC.A02 Page 4 of 8
NTF Series
Isolated 1W Wide Input DC/DC Converters
MINIMUM LOAD NTFS05XX
30 30
NTFS12XX
25
25
20
20 12V&15V
Minimum Load (%)
Minimum Load (%)
12V&15V 15 5V
15
5V
10
10
5
5
0 0 4 4.2 4.4 4.6 4.8 5 Input Voltage (V) 5.2 5.4 5.6 5.8 6 9 10 11 12 Input Voltage (V) 13 14 15
NTFS24XX
30 5V 25
20
Minimum Load (%)
12V&15V
15
10
5
0 18 20 22 24 26 28 30 32 34 36 Input Voltage (V)
RoHS COMPLIANCE INFORMATION
This series is compatible with RoHS soldering systems with a peak reflow solder temperature of 245C and time above liquidus of 217C for 80 seconds. The pin termination finish on this product series is Gold, plating thickness 0.1 microns minimum. The series is backward compatible with Sn/Pb soldering systems. For further information, please visit www.murata-ps.com/rohs
www.murata-ps.com
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_NTFC.A02 Page 5 of 8
NTF Series
Isolated 1W Wide Input DC/DC Converters
APPLICATION NOTES
Recommended input & output capacitors
Although these converters will work without external capacitors, they are necessary in order to guarantee the full parametric performance over the full line and load range. All parts have been tested and characterized using the following values and test circuit.
Value
CIN 10F, 200V good low esr capacitor COUT 22F, 16V good low esr capacitor
Test circuit, 5V, 12V and 15V output
+ VIN + VOUT
CIN
NTF
COUT
- VIN
- VOUT
ON/OFF Pin
This provides an OFF function, which puts the converter into a low power mode. When the pin is un-connected, the converter is on. The circuit used must be able to sink a peak curent of 50mA to guarantee turning the converter off. The circuit should be an open collector arrangement, an example circuit is shown below. Voltages should not be applied directly to the ON/OFF pin. The BC547 should be fitted close to the NTF ON/OFF pin to prevent the addition of excess wiring capacitance.
CTRL 47k BC547 VCONTROL
NTF
100nF
- VIN CONTROL PIN CIRCUIT INPUT VOLTAGE VCONTROL Min. Max. Module ON 0 0.2 Module OFF 1.6 30 Units V V
Output voltage adjustment
The trim resistor equations are:
RDOWN = (VDOWN - L) x G VNOM - VDOWN RUP = GxL VUP - L - K
Where: NTFS0505MC NTFS1205MC, NTFS2405MC NTFSXX12MC NTSFXX15MC TRIM DOWN
G
30100 100000 38300 49900
L
1.24 1.24 2.5 2.5
K
3.76 3.76 9.5 12.5
TRIM UP
+VIN +VOUT
+VIN
+VOUT
RDOWN
NTF
TRIM RUP
NTF
TRIM
-VOUT
When the output voltage is trimmed up, output current must be derated so that the maximum output power is not exceeded.
-VOUT
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Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_NTFC.A02 Page 6 of 8
NTF Series
Isolated 1W Wide Input DC/DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
0.700 (17.78) 0.600 (15.24) 26 24 22 18 16 14
PIN CONNECTIONS Pin Function
-VIN +VIN NA NA -VOUT
DETAIL A
REFERENCE PLANE
0.710 (18.03) 0.690 (17.53)
0.500 (12.70)
1 3 5 9 11
NTFS0505MC
XYYWW
0.020 (0.50) x12 PINS 0.0416-0.0534 (1.0565-1.3565) 0.008 (0.2)
5.0
13
14 16 18 22 24 26
+VOUT
NA TRIM NA
1 0.100 (2.54)
3
5
9
11
13
S
12 PINS 0.029 (0.74) 0.025 (0.64) 0.008 (0.2) S 2.74 (0.108) MAX DETAIL A S SEATING PLANE
ON/OFF NA NA
0.248 (6.30) 0.228 (5.80)
0.258 (6.55) 0.232 (5.90)
0.130 (3.30)
NA - Not available for electrical connection.
0.06 (1.52) MAX
x12 PINS 0.004 (0.1) S
0.010 (0.25) 0.004 (0.10)
0.012 (0.30) 0.008 (0.20)
All dimensions in inches 0.01 (mm 0.25mm). All pins on a 0.1 (2.54) pitch.
Weight: 2.8g
RECOMMENDED FOOTPRINT DETAILS
TUBE OUTLINE DIMENSIONS
+0.8 +0.031 0.228 -0.024 (5.8-0.60 )
0.819 (20.80)
0.567 (14.40)
+0.006 +0.15 0.112 -0.010 (2.85 -0.25 )
All dimensions in inches 0.02 (mm0.5) All dimensions in inches 0.02 (mm0.5). Tube length : 18.700.079 (4752.0). Tube Quantity : 25
www.murata-ps.com
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_NTFC.A02 Page 7 of 8
0.0240.006 (0.600.15)
NTF Series
Isolated 1W Wide Input DC/DC Converters
TAPE & REEL SPECIFICATIONS
REEL OUTLINE DIMENSIONS TAPE OUTLINE DIMENSIONS
+0.004 +0.10 O1.50 -0.00 (O0.059 -0.000 )
COVER TAPE
0.002 (0.05)
0.722 (18.33)
0.024 (0.60) MAX
0.079 (2.00)
NTFS0505MC
XYYWW
0.069 (1.75)
0.726 (18.43)
1.118 (28.40) 1.2600.012 (32.000.30)
0.0080.002 (0.200.05)
0.559 (14.20)
+0.002 +0.05 R0.030 -0.000 (R0.75 -0.00 )
All dimensions in inches 0.02 (mm0.5)
All dimensions in inches 0.02 (mm0.5)
REEL PACKAGING DETAILS
All dimensions in inches 0.02 (mm0.5) Reel Quantity : 400
USA: Canada: UK:
Mansfield (MA), Tel: (508) 339 3000, email: sales@murata-ps.com Toronto, Tel: (866) 740 1232, email: toronto@murata-ps.com Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com
Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.murata-ps.com email: sales@murata-ps.com ISO 9001 & ISO 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. (c) 2009 Murata Power Solutions, Inc.
France: Japan: China:
Germany: Munchen, Tel: +49 (0)89-544334-0, email: ped.munich@murata-ps.com
Singapore: Parkway Centre, Tel: +65 6348 9096, email: singapore@murata-ps.com
www.murata-ps.com
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
KDC_NTFC.A02 Page 8 of 8
0.284 (7.20)
0.256 (6.50)
DIRECTION OF UNREELING
O0.079 (O2.00) MIN
0.394 (10.00)
0.157 (4.00)
0.945 (24.00)

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