Additional Resources: Product Page | 3D Model
datedate 12/17/201312/17/2013
pagepage 1 of 91 of 9
SERIES: VHK50W DESCRIPTION: DC-DC CONVERTER
FEATURES
up to 50 W isolated output
rugged metal enclosure with integrated heat sink
4:1 input range (9~36 Vdc, 18~75 Vdc)
single output from 3.3~48 Vdc
1,500 Vdc isolation
over current, over temperature, over voltage,
and short circuit protections
remote on/off
efficiency up to 83%
input output output output ripple ef ciency
MODEL
1
voltage voltage current power and noise
range max max max typ
(Vdc) (Vdc) (A) (W) (mVp-p) (%)
VHK50W-Q24-S3R3 9 ~ 36 3.3 10 33 100 75
VHK50W-Q24-S5 9 ~ 36 5 10 50 100 79
VHK50W-Q24-S12 9 ~ 36 12 4.16 50 150 82
VHK50W-Q24-S15 9 ~ 36 15 3.33 50 150 82
VHK50W-Q24-S24 9 ~ 36 24 2.08 50 240 82
VHK50W-Q24-S28 9 ~ 36 28 1.78 50 280 82
VHK50W-Q24-S48 9 ~ 36 48 1.04 50 480 82
VHK50W-Q48-S3R3 18 ~ 75 3.3 10 33 100 76
VHK50W-Q48-S5 18 ~ 75 5 10 50 100 80
VHK50W-Q48-S12 18 ~ 75 12 4.16 50 150 83
VHK50W-Q48-S15 18 ~ 75 15 3.33 50 150 83
VHK50W-Q48-S24 18 ~ 75 24 2.08 50 240 83
VHK50W-Q48-S28 18 ~ 75 28 1.78 50 280 83
VHK50W-Q48-S48 18 ~ 75 48 1.04 50 480 83
Note: 1. Ripple and noise are measured at full load, 20 MHz BW with 10F tantalum capacitor and 1F ceramic capacitor across output. The 48 Vdc output models only require
the 1F ceramic capacitor across the output.
PART NUMBER KEY
VHK50W - QXX - SXXX
Base Number Input Voltage Output Voltage Remote On/Off Controlblan = positive logic
N = negative logic
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CUI Inc SERIES: VHK50W DESCRIPTION: DC-DC CONVERTER date 12/17/2013 page 2 of 9
INPUT
parameter conditions/description min typ max units
24 Vdc input models 9 24 36 Vdc
operating input voltage
48 Vdc input models 18 48 75 Vdc
power up 8.8 Vdc
24 Vdc input
power down 8 Vdc
under voltage shutdown
power up 17 Vdc
48 Vdc input
power down 16 Vdc
models ON (open circuit)
positive logic
models OFF (0~0.8 Vdc)
1
CTRL
models ON (0~0.8 Vdc)
negative logic
models OFF (open circuit)
lter pi lter
15A time delay fuse for 24 Vin models,
input fuse
8A time delay fuse for 48 Vin models
Note: 1. Open collector refer to -Vin
OUTPUT
parameter conditions/description min typ max units
3.3 and 5 V output models 10,000 F
12 V output models 4,160 F
15 V output models 3,330 F
maximum capacitive load
24 V output models 2,080 F
28 V output models 1,780 F
48 V output models 47 1,040 F
2
line regulation measured from high line to low line 0.2 %
2
load regulation measured from full load to zero load 0.2 %
2
voltage accuracy 1 %
adjustability 10 %
switching frequency 300 kHz
transient response 25% step load change 500 s
temperature coef cient 0.03 %/C
Note: 2. A 47 F 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 %
shutdown 100 C
over temperature protection
restart threshold 70 C
SAFETY AND COMPLIANCE
parameter conditions/description min typ max units
isolation voltage for 1 min: input/output; input/case; output/case 1,500 Vdc
isolation resistance 10 M
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
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