Datasheet

CD10.241
CD-Series
DC/DC Converter 24V/24V, 10A, 240W
4. INPUT INRUSH CURRENT AND SOFT-START BEHAVIOR
Inrush current limitation
An active inrush limitation circuit (inrush limiting NTC resistor which is bypassed by a MOSFET) limits the input inrush
current after turn-on of the input voltage.
The charging current into EMI suppression capacitors is disregarded in the first microseconds after switch-on.
Inrush current typ. 6A
peak
+25°C, cold start, input: 24Vdc
typ. 22A
peak
+60°C, cold start, input: 24Vdc
Inrush energy typ. negligible -25°C to +70°C, input: 24Vdc
Fig. 4-1 Input inrush current, typical behavior
Input Current
Input Voltage
Output Voltage
Ipk 6A
Input: 24Vdc
Output: 24V, 10A, constant current load
Ambient: 25°C
Input current 2A / DIV
Input voltage 5V / DIV
Output voltage 5V / DIV
Time basis: 100ms / DIV
Soft-start function:
After the DC/DC converter is turned on, the internal output current rises slowly to its nominal value. This method
charges the output capacitors (internal and external capacitors) slowly and avoids high input currents during turn-on.
High input currents can produce a high voltage drop on the input wiring (especially with long and thin cables) which
reduces the terminal voltage on the DC/DC converter. If the terminal voltage is below the shut-down voltage, the
DC/DC converter will turn-off and will make a new start-up attempt. This effect is avoided with the integrated soft-
start function. Please note, that this function increases the rise time of the output voltage by a small amount.
Apr. 2018 / Rev. 1.2 DS-CD10.241-EN All parameters are typical values at 24V, 10A, 24Vdc input voltage, 25°C ambient and
after a 5 minutes run-in time unless otherwise noted.
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