MGJ1 Series
5.7kVDC Isolated 1W SM Gate Drive DC/DC Converters
KDC_MGJ1_A05 Page 8 of 18
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APPLICATION NOTES (continued)
Short Circuit Performance
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
+
+
-
-
The MGJ1D05XXXXMPC offers short circuit protection at low ambient temperatures from -40°C to the temperatures shown in the below graph. All other variants in the
MGJ1 series offer coninuous short circuit protection.
1
10
100
1000
25 35 45 55 65 75 85
Time (seconds)
dĞŵƉĞƌĂƚƵƌĞ;ȗͿ
Nominal Vin
High Vin
