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SERIES: VHK75W │ DESCRIPTION: DC-DC CONVERTER
FEATURES
•
•
•
•
•
•
up to 75 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 84%
MODEL
input
voltage
output
voltage
output
current
output
power
ripple
and noise1
efficiency
range
(Vdc)
(Vdc)
max
(A)
max
(W)
max
(mVp-p)
typ
(%)
VHK75W-Q24-S3R3
9 ~ 36
3.3
15
50
100
77
VHK75W-Q24-S5
9 ~ 36
5
15
75
100
80
VHK75W-Q24-S12
9 ~ 36
12
6.25
75
150
81.5
VHK75W-Q24-S15
9 ~ 36
15
5
75
150
82.5
VHK75W-Q24-S24
9 ~ 36
24
3.12
75
240
83
VHK75W-Q24-S48
9 ~ 36
48
1.56
75
480
80
VHK75W-Q48-S3R3
18 ~ 75
3.3
15
50
100
78
VHK75W-Q48-S5
18 ~ 75
5
15
75
100
81
VHK75W-Q48-S12
18 ~ 75
12
6.25
75
150
82.5
VHK75W-Q48-S15
18 ~ 75
15
5
75
150
83.5
VHK75W-Q48-S24
18 ~ 75
24
3.12
75
240
84
VHK75W-Q48-S48
18 ~ 75
48
1.56
75
480
82
Note:
1. Ripple and noise are measured at full load, 20 MHz BW with 10µF tantalum capacitor and 1µF ceramic capacitor across output. The 48 Vdc output models only require
the 1µF ceramic capacitor across the output.
PART NUMBER KEY
VHK75W - QXX - SXX X
Base Number
Input Voltage
Output Voltage
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Remote On/Off Control
"blank" = positive logic
N = negative logic
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CUI Inc │ SERIES: VHK75W │ DESCRIPTION: DC-DC CONVERTER
date 05/30/2023 │ page 2 of 9
INPUT
parameter
conditions/description
operating input voltage
24 Vdc input models
48 Vdc input models
typ
max
units
9
18
24
48
36
75
Vdc
Vdc
24 Vdc input
power up
power down
8.8
8
Vdc
Vdc
48 Vdc input
power up
power down
17
16
Vdc
Vdc
under voltage shutdown
positive logic
remote on/off1
negative logic
models ON (REM pin open circuit)
models OFF (REM pin 0~0.8 Vdc)
models ON (REM pin 0~0.8 Vdc)
models OFF (REM pin open circuit)
filter
pi filter
input fuse
15A time delay fuse for 24 Vin models,
8A time delay fuse for 48 Vin models
Note:
min
1. Open collector refer to -Vin
OUTPUT
parameter
conditions/description
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
line regulation2
load regulation
2
min
typ
max
units
15,000
6,250
5,000
3,120
1,560
μF
μF
μF
μF
μF
measured from high line to low line
±0.2
%
measured from full load to zero load
±0.2
%
±1
%
voltage accuracy
adjustability
±10
%
switching frequency
300
kHz
transient response
25% step load change
500
temperature coefficient
Note:
±0.03
µs
%/°C
2. A 47 μF aluminum capacitor is required on the output for 48 Vdc output models.
PROTECTIONS
parameter
conditions/description
short circuit protection
continuous
over current protection
% nominal output current
min
over voltage protection
over temperature protection
max
units
110
160
%
115
140
%
shutdown
restart threshold
typ
100
70
°C
°C
SAFETY AND COMPLIANCE
parameter
conditions/description
isolation voltage
for 1 minute: input to output; input to case;
output to case
min
isolation resistance
RoHS
typ
max
units
1,500
Vdc
10
MΩ
2011/65/EU (CE)
ENVIRONMENTAL
parameter
conditions/description
min
operating temperature
see derating curve
storage temperature
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typ
max
units
-40
85
°C
-55
105
°C
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CUI Inc │ SERIES: VHK75W │ DESCRIPTION: DC-DC CONVERTER
date 05/30/2023 │ page 3 of 9
MECHANICAL
parameter
conditions/description
dimensions
min
typ
4.23 x 4.01 x 1.50 [107.5 x 101.8 x 38.0 mm]
case material
max
units
inch
steel and aluminum extrusion
weight
502
MECHANICAL DRAWING
units: inch[mm]
general tolerance: ±0.04[±1.0]
wire range: 22~12 AWG
screw size: #6-32
connector tightening torque: 1.4 N∙m (max)
PIN CONNECTIONS
PIN
FUNCTION
1
-Vo
2
-S
3
trim
4
+S
5
+Vo
6
case
7
REM
8
-Vin
9
+Vin
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g
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CUI Inc │ SERIES: VHK75W │ DESCRIPTION: DC-DC CONVERTER
date 05/30/2023 │ page 4 of 9
DERATING CURVES
TEST CONFIGURATION
Figure 1
Table 1
External components
Note:
L1
12μH
C1
220μF, ESR < 0.1Ω at 100 KHz
Cin
100μF, ESR < 0.1Ω at 100 KHz
Input reflected-ripple current is measured with an inductor L1 and Capacitor C1 to simulate source impedance.
EMC RECOMMENDED CIRCUITS
EN55022 CLASS A
Figure 2
Recommended Circuit for EN55022 Class A
(for all 3.3, 5, 12, 15, & 24 Vdc output models)
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CUI Inc │ SERIES: VHK75W │ DESCRIPTION: DC-DC CONVERTER
date 05/30/2023 │ page 5 of 9
EMC RECOMMENDED CIRCUITS (CONTINUED)
EN55022 CLASS A
Figure 3
Recommended Circuit for EN55022 Class A
(for all 48 Vdc output models)
Table 2
Class A Recommended Components
Model
C11
C21
C31
C42
CY52
CY62
L1
L2
VHK75W-Q24-S3R3
NC
47 μF/50 V
47 μF/50 V
2200 pF/2 kV
NC
NC
Short
3.4 μH
VHK75W-Q24-S5
NC
47 μF/50 V
47 μF/50 V
2200 pF/2 kV
NC
NC
Short
3.4 μH
VHK75W-Q24-S12
NC
47 μF/50 V
47 μF/50 V
2200 pF/2 kV
NC
NC
Short
3.4 μH
VHK75W-Q24-S15
NC
47 μF/50 V
47 μF/50 V
2200 pF/2 kV
NC
NC
Short
3.4 μH
VHK75W-Q24-S24
NC
100 μF/50 V
100 μF/50 V
2200 pF/2 kV
NC
NC
Short
3.4 μH
VHK75W-Q24-S48
220 μF/50 V
100 μF/50 V
NC
NC
1000 pF/2 kV
1000 pF/2 kV
0.223 mH
NC
VHK75W-Q48-S3R3
NC
47 μF/100 V
47 μF/100 V
2200 pF/2 kV
NC
NC
Short
3.4 μH
VHK75W-Q48-S5
NC
47 μF/100 V
47 μF/100 V
2200 pF/2 kV
NC
NC
Short
3.4 μH
VHK75W-Q48-S12
NC
47 μF/100 V
47 μF/100 V
2200 pF/2 kV
NC
NC
Short
3.4 μH
VHK75W-Q48-S15
NC
47 μF/100 V
47 μF/100 V
2200 pF/2 kV
NC
NC
Short
3.4 μH
VHK75W-Q48-S24
NC
47 μF/100 V
47 μF/100 V
2200 pF/2 kV
NC
NC
Short
3.4 μH
VHK75W-Q48-S48
56 μF/100 V
39 μF/100 V
NC
NC
1000 pF/2 kV
470 pF/2 kV
0.223 mH
NC
Note:
1. Aluminum capacitors.
2. Ceramic capacitors.
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CUI Inc │ SERIES: VHK75W │ DESCRIPTION: DC-DC CONVERTER
date 05/30/2023 │ page 6 of 9
EMC RECOMMENDED CIRCUITS (CONTINUED)
EN55022 CLASS B
Figure 4
Recommended Circuit for EN55022 Class B
(for all 3.3, 5, 12, & 15 Vdc output models as well as VHK75W-Q48-S24)
Figure 5
Recommended Circuit for EN55022 Class B
(for VHK75W-Q24-S24)
Table 3
Class B Recommended Components
(for all 3.3, 5, 12, 15, & 24 Vdc output models)
Model
C11
C21
C31
C42
C52
C62
C72
L1
L2
VHK75W-Q24-S3R3
47 μF/50 V
47 μF/50 V
47 μF/50 V
3300 pF/2 kV
3300 pF/2 kV
1000 pF/2 kV
NC
1.5 mH
3.4 μH
VHK75W-Q24-S5
47 μF/50 V
47 μF/50 V
47 μF/50 V
2200 pF/2 kV
3300 pF/2 kV
1000 pF/2 kV
NC
1.5 mH
3.4 μH
VHK75W-Q24-S12
47 μF/50 V
47 μF/50 V
47 μF/50 V
3300 pF/2 kV
1000 pF/2 kV
1000 pF/2 kV
NC
1.5 mH
3.4 μH
VHK75W-Q24-S15
47 μF/50 V
47 μF/50 V
47 μF/50 V
2200 pF/2 kV
3300 pF/2 kV
1000 pF/2 kV
NC
1.5 mH
3.4 μH
VHK75W-Q24-S24
100 μF/50 V
100 μF/50 V
NC
1000 pF/2 kV
1000 pF/2 kV
1000 pF/2 kV
1000 pF/2 kV
0.12 mH
0.34 mH
VHK75W-Q48-S3R3
47 μF/100 V
47 μF/100 V
47 μF/100 V
3300 pF/2 kV
3300 pF/2 kV
1000 pF/2 kV
NC
1.5 mH
3.4 μH
VHK75W-Q48-S5
47 μF/100 V
47 μF/100 V
47 μF/100 V
3300 pF/2 kV
3300 pF/2 kV
1000 pF/2 kV
NC
1.5 mH
3.4 μH
VHK75W-Q48-S12
47 μF/100 V
47 μF/100 V
47 μF/100 V
3300 pF/2 kV
3300 pF/2 kV
1000 pF/2 kV
NC
1.5 mH
3.4 μH
VHK75W-Q48-S15
47 μF/100 V
47 μF/100 V
47 μF/100 V
3300 pF/2 kV
3300 pF/2 kV
1000 pF/2 kV
NC
1.5 mH
3.4 μH
VHK75W-Q48-S24
47 μF/100 V
47 μF/100 V
47 μF/100 V
2200 pF/2 kV
2200 pF/2 kV
1000 pF/2 kV
NC
1.5 mH
3.4 μH
Note:
1. Aluminum capacitors.
2. Ceramic capacitors.
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CUI Inc │ SERIES: VHK75W │ DESCRIPTION: DC-DC CONVERTER
date 05/30/2023 │ page 7 of 9
EMC RECOMMENDED CIRCUITS (CONTINUED)
EN55022 CLASS B
Figure 6
Recommended Circuit for EN55022 Class B
(for all 48 V output models)
Table 4
Class B Recommended Components
(for all 48 V output models)
Model
C11
C21
CY52
CY62
CY72
CY82
L1
VHK75W-Q24-S48
220 μF/50 V
220 μF/50 V
1500 pF/2 kV
1000 pF/2 kV
1000 pF/2 kV
1000 pF/2 kV
0.223 mH
VHK75W-Q48-S48
56 μF/100 V
56 μF/100 V
1000 pF/2 kV
1000 pF/2 kV
1000 pF/2 kV
1000 pF/2 kV
0.223 mH
Note:
1. Aluminum capacitors.
2. Ceramic capacitors.
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CUI Inc │ SERIES: VHK75W │ DESCRIPTION: DC-DC CONVERTER
date 05/30/2023 │ page 8 of 9
APPLICATION NOTES
1. Output Voltage Trimming
Leave open if not used.
Figure 7
Table 5
VNOM
RTOP
RBOTTOM
RO
VREF
VF
(Vdc)
(kΩ)
(kΩ)
(kΩ)
(V)
(V)
3.3
3
12
18
1.24
0.46
5
2.32
8.2
0
2.5
0
12
9.1
51
18
2.5
0.46
15
12
82
18
2.5
0.46
24
20
100
20
2.5
0.46
48
36
270
14
3.085
1.15
Note:
Note:
Value for RTOP, RBOTTOM, RO, VREF ,and VF refer to Table 5 (fixed internal values).
RTRIM: Trim resistance
a: User-defined parameter, no actual meanings
VNOM: Nominal output voltage
VOUT: Target output voltage
1. All specifications are measured at Ta=25°C, nominal input voltage and full output load unless otherwise specified.
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CUI Inc │ SERIES: VHK75W │ DESCRIPTION: DC-DC CONVERTER
date 05/30/2023 │ page 9 of 9
REVISION HISTORY
rev.
description
date
1.0
initial release
03/28/2007
1.01
new template applied
12/21/2011
1.02
misc. updates and corrections
03/13/2012
1.03
updated mechanical drawing
03/27/2012
1.04
V-Infinity branding removed
06/27/2012
1.05
updated spec
03/14/2013
1.06
added trimming and EMI information
12/16/2013
1.07
company logo updated
02/08/2021
1.08
pin connection table & remote on/off updated
04/29/2021
1.09
derating curve and circuit figures updated
09/06/2021
1.10
tolerances updated in the mechanical drawing section
01/05/2022
1.11
mechanical tolerance updated
04/13/2022
1.12
output voltage trimming updated
05/23/2023
The revision history provided is for informational purposes only and is believed to be accurate.
Headquarters
20050 SW 112th Ave.
Tualatin, OR 97062
800.275.4899
Fax 503.612.2383
cui.com
techsupport@cui.com
CUI offers a two (2) year limited warranty. Complete warranty information is listed on our website.
CUI reserves the right to make changes to the product at any time without notice. Information provided by CUI is believed to be accurate and reliable. However, no responsibility is
assumed by CUI for its use, nor for any infringements of patents or other rights of third parties which may result from its use.
CUI products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. A critical component is any component of a
life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
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