B-XT Datasheet, PDF (3/6 Pages) Microdc power Technology Co., Ltd – 1W, FIXED INPUT, ISOLATED SINGLE OUTPUT SMD DC-DC CONVERTER

B-XT Series
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.
Start-up time
Start-up time
μs
μs
B0303XT
437
B0506XT
7200
B0305XT
1359
B0509XT
3146
B0309XT
3435
B0512XT
4960
B0312XT
6590
B0515XT
7740
B0315XT
7625
B1205XT
895
B0503XT
533
B1209XT
2150
B0505XT
1368
B1212XT
3640
B0505NXT
721
B1215XT
7180
Ripple & Noise Characterization 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 fi lm, ±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
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