Datasheet

MEV1 Series
3kVDC Isolated 1W Single & Dual Output DC/DC Converters
KDC_MEV1.F05 Page 5 of 10
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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.
Ripple & Noise Characterisation Method
Ripple and noise measurements are performed with the following test configuration.
C1 1µF X7R m ultilayer 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 100m at 100 kHz
C3 100nF multilayer ceramic capacitor, general purpose
R1 450 resistor, carbon film, ±1% tolerance
R2 50 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
OSCILLOSCOPE
Y INPUT
SUPPLY
C1 C2 C3 R1 T1
R2
Input Output
DC/DC Converter
R LOAD
+
+
-
-
Typical Start-Up Wave Form
Start-up time Start-up time
µs µs
MEV1x0505xC 585 MEV1x1512xC 3045
MEV1x0509xC 1550 MEV1x1515xC 4445
MEV1x0512xC 2700 MEV1x2405xC 440
MEV1x0515xC 4320 MEV1x2409xC 4355
MEV1x1205xC 605 MEV1x2412xC 1855
MEV1x1209xC 1750 MEV1x2415xC 2930
MEV1x1212xC 3000 MEV1x4805SC 580
MEV1x1215xC 4800 MEV1x4809SC 1320
MEV1x1505xC 660 MEV1x4812SC 2075
MEV1x1509xC 1720 MEV1x4815SC 3235