Datasheet

cui.com
CUI Inc │ SERIES: VHK75W │ DESCRIPTION: DC-DC CONVERTER date 12/16/2013 │ page 2 of 9
INPUT
parameter conditions/description min typ max units
operating input voltage
24 Vdc input models
48 Vdc input models
9
18
24
48
36
75
Vdc
Vdc
under voltage shutdown
24 Vdc input
power up
power down
8.8
8
Vdc
Vdc
48 Vdc input
power up
power down
17
16
Vdc
Vdc
CTRL
1
positive logic
models ON (open circuit)
models OFF (0~0.8 Vdc)
negative logic
models ON (0~0.8 Vdc)
models OFF (open circuit)
lter pi lter
input fuse
15A time delay fuse for 24 Vin models,
8A time delay fuse for 48 Vin models
Note: 1. Open collector refer to -Vin
OUTPUT
parameter conditions/description min typ max units
maximum capacitive load
3.3 and 5 V output models
12 V output models
15 V output models
24 V output models
48 V output models
15,000
6,250
5,000
3,120
1,560
μF
μF
μF
μF
μF
line regulation
2
measured from high line to low line ±0.2 %
load regulation
2
measured from full load to zero load ±0.2 %
voltage accuracy ±1 %
adjustability ±10 %
switching frequency 300 kHz
transient response 25% step load change 500 µs
temperature coefcient ±0.03 %/°C
Note: 2. A 47 μF aluminum capacitor is required on the output for 48 Vdc output models.
PROTECTIONS
parameter conditions/description min typ max units
short circuit protection continuous
over current protection % nominal output current 110 160 %
over voltage protection 115 140 %
over temperature protection
shutdown
restart threshold
100
70
°C
°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 curve -40 85 °C
storage temperature -55 105 °C
For more information, please visit the product page.