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参数资料
| 型号： | MER1S4805SC |
| 厂商： | MURATA POWER SOLUTIONS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 1 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT PACKAGE-4/6 |
| 文件页数： | 5/7页 |
| 文件大小： | 145K |
| 代理商： | MER1S4805SC |
Technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232
MER1 Series
1kVDC Isolated 1W Single Output DC/DC Converters
2011/01/24
KDC_MER1.B03 Page 5 of 7
www.murata-ps.com
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 MER1 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 MER1 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 MER1 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.
SAFETY APPROVAL
The MER1 series has been recognized by Underwriters Laboratory (UL) to UL 60950 for functional insulation in a maximum ambient temperature of 85°C and/or case temperature
limit of 130°C (case temperature measured on the face opposite the pins). File number E179522 applies.
The MER1 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 dened below.
MER1S05xxSC: 1A
MER1S12xxSC: 0.375A
MER1S15xxSC: 0.375A
MER1S24xxSC: 0.2A
MER1S48xxSC: 0.1A
All fuses should be UL approved and rated to at least the maximum allowable DC input voltage.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MER1S4805SC | 制造商:Murata Power Solutions 功能描述:DC/DC CONVERTER |
| MER1S4809SC | 功能描述:DC/DC转换器 1W 48Vin 9Vout 111mA 1kVDC Isolated SIP RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| MER1S4809SC | 制造商:Murata Power Solutions 功能描述:DC/DC CONVERTER |
| MER1S4812SC | 功能描述:DC/DC转换器 1W 48Vin 12Vout 84mA 1kVDC Isolated SIP RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| MER1S4812SC | 制造商:Murata Power Solutions 功能描述:DC/DC CONVERTER |
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