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CD5.241-S1 Arkusz danych(PDF) 5 Page - PULS GmbH |
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CD5.241-S1 Arkusz danych(HTML) 5 Page - PULS GmbH |
5 / 23 page CD5.241-S1 CD-Series DC/DC Converter 24V, 5A 4. SOFT-START AND INPUT INRUSH CURRENT SURGE Inrush current limitation An active inrush limitation circuit (inrush limiting resistor which is bypassed by a relay contact) 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 max. 1.6Apeak -25°C to +70°C, input: 24Vdc typ. 1.2Apeak -25°C to +70°C, 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 Input: 24Vdc Output: 24V, 5A, constant current load Ambient: 25°C Upper curve: Input current 2A / DIV Middle curve: Input voltage 20V / DIV Lower curve: Output voltage 20V / 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. Fig. 4-2 Soft-start behavior Input Current Input: 24Vdc Output: 24V, 5A, constant current load Ambient: 25°C No additional external output capacitors Upper curve: Input current 2A / DIV Lower curve: Output voltage 10V / DIV Time basis: 20ms / DIV Output Voltage Mar. 2016 / Rev. 1.5 DS-CD5.241-S1-EN All parameters are specified at 24V, 5A, 24Vdc input voltage, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 5/23 |
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