MEE1S0303SC Datasheet, PDF (5/7 Pages) Murata Power Solutions Inc. – Isolated 1W Single Output DC/DC Converters

MEE1 Series
Isolated 1W Single 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 1.25 times 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.
MEE1S0303XC
MEE1S0305XC
MEE1S0309XC
MEE1S0312XC
MEE1S0315XC
MEE1S0503XC
MEE1S0505XC
MEE1S0509XC
MEE1S0512XC
MEE1S0515XC
MEE1S1205XC
Start-up time
μs
355
622
1542
2410
3346
334
402
1316
1776
2232
285
MEE1S1209XC
MEE1S1212XC
MEE1S1215XC
MEE1S1505XC
MEE1S1509XC
MEE1S1512XC
MEE1S1515XC
MEE1S2405XC
MEE1S2409XC
MEE1S2412XC
MEE1S2415XC
Start-up time
μs
818
1285
2052
260
642
993
1574
221
541
860
1049
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_MEE1.C01 Page 5 of 7