MEV1D4809SC 查看數據表（PDF） - Murata Power Solutions
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MEV1D4809SC Datasheet PDF : 10 Pages
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MEV1 Series
3kVDC Isolated 1W Single & Dual Output DC/DC Converters
APPLICATION NOTES
Minimum load
The minimum load to meet datasheet specification is 10% of the full rated load across the specified input voltage range. Lower than 10% minimum loading will result in
an increase in output voltage, which may rise to typically double the specified output voltage if the output load falls to less than 5%.
Capacitive loading and start up
Typical start up times for this series, with a typical input voltage rise time of 2.2μs and output capacitance of 10μF, are shown in the table below. The product
series will start into a capacitance of 47μF with an increased start time, however, the maximum recommended output capacitance is 10μF.
MEV1x0505xC
MEV1x0509xC
MEV1x0512xC
MEV1x0515xC
MEV1x1205xC
MEV1x1209xC
MEV1x1212xC
MEV1x1215xC
MEV1x1505xC
MEV1x1509xC
Start-up time
μs
585
1550
2700
4320
605
1750
3000
4800
660
1720
MEV1x1512xC
MEV1x1515xC
MEV1x2405xC
MEV1x2409xC
MEV1x2412xC
MEV1x2415xC
MEV1x4805SC
MEV1x4809SC
MEV1x4812SC
MEV1x4815SC
Start-up time
μs
3045
4445
440
4355
1855
2930
580
1320
2075
3235
Typical Start-Up Wave Form
Ripple & Noise Characterisation Method
Ripple and noise measurements are performed with the following test configuration.
C1
1μF X7R multilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC/DC converter
C2
10μF 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 100mΩ at 100 kHz
C3
100nF multilayer ceramic capacitor, general purpose
R1
450Ω resistor, carbon film, ±1% tolerance
R2
50Ω 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
SUPPLY
DC/DC Converter
++
Input Output
--
C1 C2 C3 R1
OSCILLOSCOPE
T1
R2
Y INPUT
R LOAD
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KDC_MEV1.F05 Page 5 of 10
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