Datasheet

cui.com
CUI Inc │ SERIES: VFK400W-DIN │ DESCRIPTION: DC-DC CONVERTER date 06/16/2014 │ page 2 of 6
INPUT
parameter conditions/description min typ max units
operating input voltage
24 Vdc input 10 24 36 Vdc
48 Vdc input
12 Vdc output model
24/48 Vdc output models
20
18
48
48
75
75
Vdc
Vdc
under voltage shutdown
24 Vdc input
power up
power down
9.5
8.5
Vdc
Vdc
48 Vdc input
power up
power down
17.8
15.5
Vdc
Vdc
CTRL
1
positive logic
models ON (>3.5 Vdc or open circuit)
models OFF (0~1.2 Vdc)
lter pilter
Note: 1. Open collector refer to -Vin
OUTPUT
parameter conditions/description min typ max units
maximum output capacitance for all models 2,200 μF
line regulation measured from high line to low line ±1 %
load regulation measured from full load to zero load ±1 %
voltage accuracy ±1.5 %
adjustability 90 105 %
switchingfrequency 250 kHz
transient response 25% step load change 500 µs
temperaturecoefcient ±0.03 %/°C
PROTECTIONS
parameter conditions/description min typ max units
short circuit protection continuous
over current protection % nominal output current 110 150 %
over voltage protection 115 140 %
over temperature protection shutdown 110 °C
SAFETY AND COMPLIANCE
parameter conditions/description min typ max units
isolation voltage
for 1 minute: input to output; input to case;
output to case
1,500 Vdc
isolation resistance 10 MΩ
RoHS 2011/65/EU (CE)
ENVIRONMENTAL
parameter conditions/description min typ max units
operating temperature see derating curves -40 85 °C
storage temperature -55 105 °C
For more information, please visit the product page.