VWRBS1 [CUI]
DC-DC CONVERTER;
CUI INC 
For more information, please visit the product page.
date 09/05/2012
page 1 of 6
SERIES: VWRBS1 │ DESCRIPTION: DC-DC CONVERTER
FEATURES
• 1 W isolated output
• wide input (2:1)
• industry standard 8 pin SIP package style
• single unregulated outputs
• 1,500 V isolation
• short circuit protection
• wide temperature (-40~85°C)
• efficiency up to 80%
RoHS
input
voltage
output
voltage
output
curent
out
power
max
ripple
efficiency
MODEL
and noise1
typ
range
mi
max
typ
typ
(Vdc)
(Vdc)
4.5~9
4.5~9
4.5~9
4.5~9
9~18
(Vdc)
5
(mA)
20
11
8
(mA)
(W)
(mVp-p)
(%)
VWRBS1-D5-S5-SIP
VWRBS1-D5-S9-SIP
VWRBS1-D5-S12-SIP
VWRBS1-D5-S15-SIP
VWRBS1-D12-S5-SIP
VWRBS1-D12-S9-SIP
VWRBS1-D12-S12-SIP
VWRBS1-D12-S15-SIP
VWRBS1-D15-S5-SIP
VWRBS1-D15-S9-SIP
VWRBS1-D15-S12-SIP
VWRBS1-D15-S15-SIP
VWRBS1-D24-S5-SIP
VWRBS1-D24-S9-SIP
VWRBS1-D24-S12-SIP
VWRBS1-D24-S15-IP
VWRBS1-D48-S5SIP
VWRBS1-D48-S9-P
VWRBS18-S12-SIP
VWRBS1-D4815-SIP
5
20
111
83
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
35
35
70
71
76
75
76
78
79
80
75
79
80
81
76
78
80
80
76
78
80
80
5
9
5
12
5
5
35
5
7
67
35
12
12
12
12
15
15
15
15
24
24
24
4
48
48
48
48
20
11
8
200
111
83
30
9~18
9
30
9~18
12
15
30
9~18
7
67
30
20
11
8
200
111
83
80
9
80
12
15
5
80
7
67
80
18~36
18~36
18~36
18~36
36~72
36~72
36~72
36~72
20
11
8
200
111
83
55
9
55
12
15
5
55
7
67
55
20
11
8
200
111
83
382
382
382
382
9
12
15
7
67
Notes:
1. ripple anoise are measured at 20 MHz BW
MBER KEY
VWRBS1 - DXX - SXX -SIP
Base Number
Input Voltage
Output Voltage
Packaging Style
cui.com
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CUI Inc │ SERIES: VWRBS1 │ DESCRIPTION: DC-DC CONVERTER
date 09/05/2012 │ page 2 of 6
INPUT
parameter
conditions/description
5 Vdc model
min
typ
max
units
-0.7
-0.7
-0.7
-0.7
12
25
50
12 Vdc model
24 Vdc model
48 Vdc model
input surge voltage
for 1,000 ms
100
internal power dissipation
short circuit input power
input filter
1.6
1
C filter
OUTPUT
parameter
conditions/description
min
typ
max
units
positive
negative
±1
±2
±3
±5
%
%
voltage accuracy
refer to recommended circuit
line regulation
measured from low line to high line
measured from 10% to 100% full load
25% load step change
±0.
±0.5
8
±0.5
±0.75
10
%
%
load regulation
transient recovery time
transient response deviation
ms
%
25% load step change
±3
±5
all other models
15 V model
25
80
75
150
mVp-p
mVp-p
ripple & noise
switching frequency
100% load, nominal input voltage
300
kHz
temperature coefficient
±0.03
%/°C
PROTECTIONS
parameter
conditions/descripion
min
typ
max
units
short circuit protection
continuous, automatirecover
SAFETY AND COMPLIANCE
parameter
condition
min
typ
max
units
Vdc
MΩ
isolation voltage
insulation resistance
isolation capacitance
RoHS compliant
MTBF
tested fmA max.
500 Vd
1,500
1,000
input to outpu
35
pF
yes
MIL-HDBK-27F, 25°C
1,000,000
hours
ENVIRONMENTAL
parameter
conditions/description
min
-40
-50
typ
max
85
units
°C
operating mperature
storage temrature
storage humidit
125
95
°C
non-condensing
%
at full load, 25°C
all other models
15 V model
rise
ure
15
80
35
150
°C
°C
1.5 mm from case for 10 seconds
300
°C
cui.com
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CUI Inc │ SERIES: VWRBS1 │ DESCRIPTION: DC-DC CONVERTER
date 09/05/2012 │ page 3 of 6
EMC RECOMMENDED CIRCUIT
RECOMMENDED EXTERNAL
Vin = 5V
Vin = 12V
Vin = 24V
10D560K
Vin = 48V
10D121K
CIRCUIT PARAMETERS
FUSE
MOV
LDM1
TVS
C0
choose accoing load
---
---
---
---
82 μH, CD53
SMCJ13A
SMCJ8A
SMCJ48A
SMCJ100A
120 μF / 100 V
680 μF / 16 V
4.7 μF / 50 V, 1210
680 / 25 V
2.2 F / 5V, 1210
120 μF / 50 V
C1
47 μF / 50 V, 1210
4.7 μF / 100 V, 1210
LDM2
C2
12 μH, CD43
1 μF / 50 V, 1210
1 F / 50 V, 121
1 μF / 50 V, 1210
1 μF / 100 V, 1210
C4
100 pF / 2 kV, 120
100 pF / 2 kV, 1206
100 pF / 2 kV, 1206
cui.com
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CUI Inc │ SERIES: VWRBS1 │ DESCRIPTION: DC-DC CONVERTER
date 09/05/2012 │ page 4 of 6
DERATING CURVES
1. output power vs. ambient temperature
2. efficiency vs. output power
3. efficiency vs. output c
Vin=Vin-mi
Vin=Vin-nom
85
83
81
90
80
70
79
77
100
80
60
50
60
75
40
20
73
71
69
40
30
-40
-20
0
20
40
60 71
85
100
120
9
10
11
12
13
14
15
16
17
18
20
30
40
0
60
70
80
90
100
Ambient Temperature (°C)
Input Voltage (Vac)
Out Current (%)
MECHANICAL
parameter
dimensions
conditions/description
min
typ
max
units
0.866 x 0.472 x 0.374 (22.00 x 12.00 x 9.50 m)
UL94-V0 epoxy resin
inch
case material
weight
5
g
MECHANICAL DRAWING
units: mm [inches]
tolerance: ±0.25 [±0.010]
pin section tolerance: ±0.10 mm [±0.004]
∅0.70 [0.028]
22.00 [0.86
(Botm View
1
5
2
3
6
7
8
1
2
3
5
6
0.50[0.020]
2.54[0.100]
17.78[0.700]
17.00]
PIN CONNECTIONS
PIN
1
FUNCTION
GND
Vin
2
3
CTRL
NC
5
(Side View)
6
+Vo
7
0 V
8
CS
4.10 [0.161]
2.54[0.100]
cui.com
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CUI Inc │ SERIES: VWRBS1 │ DESCRIPTION: DC-DC CONVERTER
date 09/05/2012 │ page 5 of 6
APPLICATION NOTES
1. Requirement on Output Load
In order to ensure the product operates efficiently and reliably, make sure the specified range of input voltage is not exc
the minimum output load is not less than 10% load. If the actual load is less than the specifi ed minimum load, the ou
increase sharply while its effi ciency and reliability will reduce greatly. If the actual output power is very small, please a
appropriate resistor as extra loading.
2. Overload Protection
Under normal operating conditions, the output circuit of these products has no protection against overload. he simest method s to
connect a self-recovery fuse in series at the end or add a circuit breaker to the circuit.
5 Vdc models
12 Vdc models
24 Vdc models
48 Vdmodels
1,000 mA slow-blow type
500 mA slow-blow type
250 mA slow-blow type
120 mA slow-ow type
3. Recommended Circuit
All VWRBS1 converters have been tested according to the following recommended testing rcuit befre leavinthe factory. This
series should be tested under load, never under no load (Figure 1).
Ic
D1
R
Vc
Figure 1
3
Lin
2
1
6
8
Vi n
+Vo
V
Cin
Co
Cs
GND
7
However, the capacitance of the output filter capacitor must be proper. Ithe capacitance is too big, a startup problem might arise.
For every channel of output, provided the safe and reliable peration is enred, the greatest capacitance of its filter capacitor sees
(Table 1).
General:
5, 12 V
100 μF
Vout
(Vdc)
Cout
(μF)
Tale 1
Cin
24, 48 V
3.3
5
2,200
1,000
680
Cout
Lin
47
4.
2.
10~
9
Lout
Cs
12
15
470
330
4. CTRL Terminal
When open or high impedce, the converer work well; When this pin is ‘high’; the converter shutdown; It should be note that the
input current shoulbetwe5~10 mA, ceeding the maximum 20 mA will cause permanence damage to the converter.
The value of R cn be derived s follow
VC-VD-1.0
R=
IC
5. Input Crent
While using unstable power source, please ensure the output voltage and ripple voltage do not excced indexes of the converter. The
receding por source must be able to provide for converter sufficient starting current Ip.
Ip ≤1.*Iin-max
Ip
Input Voltage
Range
Input Voltage (V)
6. No parallel connection or plug and play
cui.com
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CUI Inc │ SERIES: VWRBS1 │ DESCRIPTION: DC-DC CONVERTER
date 09/05/2012 │ page 6 of 6
REVISION HISTORY
rev.
description
date
1.0
initial release
09/10/2008
05/23/012
09/4/2012
1.01
1.02
new template applied
V-Infinity branding removed
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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