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参数资料
| 型号： | NTH1212MC |
| 厂商： | MURATA POWER SOLUTIONS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 2-OUTPUT 2 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT, SMD-26/12 |
| 文件页数： | 2/6页 |
| 文件大小： | 149K |
| 代理商： | NTH1212MC |
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
NTH Series
Isolated 2W Dual Output SM DC/DC Converters
2010-07-08
KDC_NTHC.C01 Page 2 of 6
www.murata-ps.com
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
Min.
Typ.
Max.
Units
Specication
All output types
-40
85
°C
Storage
-55
125
Case temperature rise above
ambient
5V output types
30
All other output types
25
Cooling
Free air convection
TOLERANCE ENVELOPE
TEMPERATURE DERATING GRAPH
150
100
50
0
-40
0
1.0
2.0
3.0
Safe Operating Area
85°C
Ambient Temperature (°C)
Output
P
o
wer
(W)
RoHS COMPLIANCE INFORMATION
This series is compatible with RoHS soldering
systems with a peak reow solder temperature
of 245C and time above liquidus of 217C
for 60 seconds. The pin termination nish 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
Output Load Current (%)
Output
V
olta
ge
-5.0%
-1.5%
+2.0%
Typical Load
Line
100
75
50
25
10
+5%
+1.5%
-2.0%
Output Load Current (%)
Output
V
olta
ge
-5.0%
-1.25%
+2.5%
Typical
Load
Line
100
75
50
25
10
0%
+7.5%
+3.75%
5V output types
All other output types
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 specied time, across a component designed to provide electrical isolation, to verify the integrity of that isolation.
Murata Power Solutions NTH 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 specic agency approvals, such as the NTH 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 NTH 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 specied 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.
The voltage tolerance envelope shows typical load regulation characteristics for this product series. The tolerance envelope is the maximum output voltage variation due to
changes in output loading.
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