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| 型号： | NDH4815SC |
| 厂商： | Murata Power Solutions Inc |
| 文件页数： | 2/4页 |
| 文件大小： | 0K |
| 描述： | CONV DC/DC 3W 48VIN 15VOUT SIP |
| 产品培训模块： | Low Power DC/DC Converters <5W |
| 标准包装： | 19 |
| 系列： | NDH |
| 类型： | 隔离 |
| 输出数： | 2 |
| 电压 - 输入（最小）： | 36V |
| 电压 - 输入（最大）： | 72V |
| Voltage - Output 1： | 15V |
| Voltage - Output 2： | -15V |
| 电流 - 输出（最大）： | 100mA，100mA |
| 电源（瓦） - 制造商系列： | 3W |
| 电压 - 隔离： | 1kV（1000V） |
| 安装类型： | 通孔 |
| 封装/外壳： | 9-SIP 模块（7 引线） |
| 尺寸/尺寸： | 1.02" L x 0.36" W x 0.49" H（25.9mm x 9.1mm x 12.4mm） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 85°C |
| 效率： | 78% |
| 电源（瓦特）- 最大： | 3W |
| 产品目录页面： | 2716 (CN2011-ZH PDF) |
| 其它名称： | 811-1355-5 |
NDH Series
Isolated 3W Dual Output DC/DC Converters
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
MIN.
TYP.
MAX.
Units
Speci?cation
-40
85
Operation
Storage
Case temperature rise above ambient
12V & 15V output types @ 100% load
-40
-50
100
130
36
°C
MTTF (MEAN TIME TO FAILURE)
Part Number
NDH2412SC
NDH2415SC
NDH4812SC
NDH4815SC
MTTF
2077
2080
2090
2045
Units
kHrs
Conditions
Calculated using MIL-HDBK 217F with Nominal
input at full voltage (ground benign) at 25°C.
GENERAL CHARACTERISTICS
Parameter
Control pin (CTRL) input current
Conditions
Please refer to control pin application note
Load causing lowest frequencies, 100% load V IN MIN.
MIN.
6
100
TYP.
125
MAX.
15
150
Units
mA
Switching frequency
kHz
Load causing highest frequencies, 25% load V IN MAX.
300
400
500
ISOLATION CHARACTERISTICS
Parameter
Isolation test voltage
Resistance
Conditions
Flash tested for 1 second
V ISO = 1000V DC
MIN.
1000
1
TYP.
MAX.
Units
V DC
GΩ
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 speci?ed time, across a component designed to provide electrical isolation, to verify the integrity of that isolation.
Murata Power Solutions NDH 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 speci?c agency approvals, such as the NDH 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 NDH series has an EI ferrite core, 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 speci?ed 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/support
KDC_NDH.C02 Page 2 of 4
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