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date 03/18/2013
pagepage 1 of 41 of 4
SERIES: VQE50W DESCRIPTION: DC-DC CONVERTER
FEATURES
up to 50 W isolated output
industry standard quarter brick package
4:1 input range (9~36 V, 18~75 V)
single output from 3.3~48 V
1,500 V isolation
tantalum free capacitors used
over current, over temperature, over voltage,
and short circuit protections
remote on/off
very high efficiency up to 92%
RoHS
input output output output ripple and efficiency
MODEL
1
voltage voltage current power noise
range max max max typ
(Vdc) (Vdc) (A) (W) (mVp-p) (%)
VQE50W-Q24-S3R3 9 ~ 36 3.3 10 33 100 90.5
VQE50W-Q24-S5 9 ~ 36 5 10 50 100 91.5
VQE50W-Q24-S12 9 ~ 36 12 4.16 50 150 91.5
VQE50W-Q24-S15 9 ~ 36 15 3.33 50 150 91.5
VQE50W-Q24-S24 9 ~ 36 24 2.08 50 240 90
VQE50W-Q24-S48 9 ~ 36 48 1.04 50 480 88.5
VQE50W-Q48-S3R3 18 ~ 75 3.3 10 33 100 90
VQE50W-Q48-S5 18 ~ 75 5 10 50 100 92
VQE50W-Q48-S12 18 ~ 75 12 4.16 50 150 92
VQE50W-Q48-S15 18 ~ 75 15 3.33 50 150 91
VQE50W-Q48-S24 18 ~ 75 24 2.08 50 240 90.5
VQE50W-Q48-S48 18 ~ 75 48 1.04 50 480 89
Notes: 1. ripple and noise are measured at 20 MHz BW with 10F tantalum capacitor and 1F ceramic capacitor across output
PART NUMBER KEY
VQE50W - QXX - SXX X
Base Number Input Voltage Output Voltage Remote On/Off Controlblan = positive logic
N = negative logic
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CUI Inc SERIES: VQE50W DESCRIPTION: DC-DC CONVERTER date 03/18/2013 page 2 of 4
INPUT
parameter conditions/description min typ max units
24 V input 9 24 36 Vdc
operating input voltage
48 V input 18 48 75 Vdc
24 V input 50 Vdc
surge voltage 100 ms max.
48 V input 100 Vdc
24 V input 8.8 Vdc
power up
48 V input 17 Vdc
under voltage lockout
24 V input 8 Vdc
power down
48 V input 16 Vdc
1
positive logic remote on/off
filter PI type
Notes: 1. logic compatibility, open collector ref to -input
Module ON, 3.5 ~ 75 Vdc or open circuit
Module OFF, <1.2 Vdc
2. negative logic remote on/off available
Module ON, <1.2 Vdc current limit, 110~165% nominal output
Module OFF, 3.5 ~ 75 Vdc or open circuit
OUTPUT
parameter conditions/description min typ max units
line regulation measured from high line to low line 0.2 %
load regulation measured from full load to zero load 0.2 %
voltage accuracy 1.5 %
transient response 25% step load change 500 s
external trim adj. range 10 %
switching frequency 100% load, input voltage range 300 kHz
temperature coefficient 0.03 %/C
PROTECTIONS
parameter conditions/description min typ max units
over voltage protection %Vo 115 140 %
short circuit protection continuous
current limit % nominal output current 110 165 %
thermal shutdown case temp. 110 C
SAFETY AND COMPLIANCE
parameter conditions/description min typ max units
input to output 1,500 Vdc
isolation voltage input to case 1,500 Vdc
output to case 1,500 Vdc
isolation resistance 10 M
isolation capacitance 1,000 pF
safety approvals UL 60950-1, CE
RoHS compliant yes
MTBF MIL-STD-217F, GB, 25C, full load TBD hours
ENVIRONMENTAL
parameter conditions/description min typ max units
case operating temperature -40 105 C
storage temperature -55 125 C
humidity non-condensing 95 %
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