Datasheet

ManualsBrandsMURATA POWER SOLUTIONS ManualsPSU ComponentsDC/DC converter (print) 12 V 84 mA 1 W No. of outputs: 1 x

MER1 Series

1kVDC Isolated 1W Single Output DC/DC Converters

KDC_MER1.B06 Page 3 of 11

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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

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

Input Output

DC/DC Converter

R LOAD

Typical Start-Up Wave Form

Start-up time Start-up time

µs µs

MER1S0505SC 600 MER1S1512SC 3375

MER1S0509SC 1730 MER1S1515SC 5090

MER1S0512SC 3780 MER1S2405SC 431

MER1S0515SC 6700 MER1S2409SC 245

MER1S1205SC 750 MER1S2412SC 1634

MER1S1209SC 2605 MER1S2415SC 2682

MER1S1212SC 3754 MER1S4805SC 512

MER1S1215SC 5280 MER1S4809SC 1432

MER1S1505SC 704 MER1S4812SC 2528

MER1S1509SC 1859 MER1S4815SC 3884