Datasheet

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date
09/07/2012
page
1 of 5
SERIES: VASD0.25-DIP │ DESCRIPTION: DC-DC CONVERTER
FEATURES
d
0.25 W isolated output
industry standard 14 pin DIP package
dual unregulated outputs
1,000 V isolation
short circuit protection
UL safety approvals
wide temperature (-40~85°C)
efficiency up to 66%
RoHS
output
voltage
typ
(Vdc)
range
(Vdc)
VASD0.25-S5-D5-DIP
5
4.5~5.5
VASD0.25-S5-D9-DIP
5
4.5~5.5
VASD0.25-S5-D12-DIP
5
4.5~5.5
5
VASD0.25-S12-D5-DIP
12
VASD0.25-S12-D9-DIP
12
VASD0.25-S12-D12-DIP
12
ripple
and noise1
efficiency
(Vdc)
max
(mA)
max
(W)
max
(mVp-p)
typ
(%)
±5
±25
0.25
75
62
±9
±13.8
0.25
75
64
±12
±10.4
0.25
75
66
4.5~5.5
±15
±8.3
0.25
75
65
10.8~13.2
±5
±25
0.25
75
62
10.8~13.2
±9
±13.8
0.25
75
63
10.8~13.2
±12
±10.4
0.25
75
64
1. ripple and noise are measured at 20 MHz BW
2. unbalanced load: ±5%
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Notes:
output
power
nt
VASD0.25-S5-D15-DIP
output
current
in
input
voltage
MODEL
ue
•
•
•
•
•
•
•
•
D
is
PART NUMBER KEY
Base Number
VASD0.25 - SXX - DXX -DIP
Input Voltage
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Output Voltage
Packaging Style
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CUI Inc │ SERIES: VASD0.25-DIP │ DESCRIPTION: DC-DC CONVERTER
date 09/07/2012 │ page 2 of 5
INPUT
parameter
conditions/description
min
typ
max
units
operating input voltage
5 V model
12 V model
4.5
10.8
5
12
5.5
13.2
Vdc
Vdc
parameter
conditions/description
min
typ
max
units
line regulation
for Vin change of 1%
1.2
%
load regulation
measured from 10%
load to full load
15
15
15
15
%
%
%
%
OUTPUT
see derating curves
switching frequency
100% load, input voltage range
temperature coefficient
Notes:
1. test ripple and noise by “parallel cable” method.
PROTECTIONS
conditions/description
min
in
parameter
ue
voltage accuracy
10.5
8.3
6.8
6.3
d
5 V model
9 V model
12 V model
15 V model
short circuit protection
SAFETY AND COMPLIANCE
kHz
±0.03
%/°C
typ
units
1
s
max
units
isolation voltage
for 1 minute at 1 mA max.
1,000
Vdc
isolation resistance
at 500 Vdc
1,000
MΩ
safety approvals
UL 60950-1 (E222736)
3,500,000
hours
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yes
nt
conditions/description
RoHS compliant
typ
max
parameter
MTBF
min
100
ENVIRONMENTAL
parameter
conditions/description
min
typ
max
units
operating temperature
-40
85
°C
storage temperature
-55
125
°C
storage humidity
non-condensing
at full load
15
is
temperature rise
1.5 mm from case for 10 seconds
D
lead temperature
cui.com
95
%
25
°C
300
°C
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CUI Inc │ SERIES: VASD0.25-DIP │ DESCRIPTION: DC-DC CONVERTER
date 09/07/2012 │ page 3 of 5
DERATING CURVES
1. output power vs. ambient temperature
2. output voltage vs. output current
+10%
80
60
40
-40
-20
0
20
40
60
85
+2.5%
Voltage
-2.5%
ue
20
+5%
Nominal
d
Output Voltate (%)
Load (%)
100
105
50%
10%
Ambient Temperature (°C)
conditions/description
dimensions
0.787 x 0.394 x 0.276 (20.00 x 10.00 x 7.00 mm)
min
case material
plastic (UL94-V0)
typ
in
parameter
weight
nt
MECHANICAL DRAWING
units: mm [inches]
tolerance: ±0.25 [±0.010]
pin section tolerance: ±0.10 mm [±0.004]
max
2.1
First Angle Projection
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RECOMMENDED FOOTPRINT
Top view,grid:2.54mm(0.1inch),
diameter:1.00mm
Dual Output
is
7.00
[0.276]
Side view
7.62
[0.300]
4.10
[0.161]
D
10.00
[0.394]
PIN CONNECTIONS
15.24[0.600]
Bottom view
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PIN
FUNCTION
1
GND
7
NC
8
0V
9
+Vo
11
-Vo
14
Vin
units
inch
g
20.00[0.787]
100%
Output Current (%)
MECHANICAL
-7.5%
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CUI Inc │ SERIES: VASD0.25-DIP │ DESCRIPTION: DC-DC CONVERTER
date 09/07/2012 │ page 4 of 5
APPLICATION NOTES
Requirement on Output Load
In order to ensure the product operates efficiently and reliably, make sure the specified range of input voltage is not exceeded and the
minimum output load is not less than 10% load. If the actual load is less than the specified minimum load, the output ripple may
increase sharply while its efficiency and reliability will reduce greatly. If the actual output power is very small, please add an
appropriate resistor as extra loading.
2.
Overload Protection
Under normal operating conditions, the output circuit of these products has no protection against over-current and short-circuits. The
simplest method is to connect a self-recovery fuse in series at the input end or add a circuit breaker to the circuit.
3.
Filtering
In some circuits which are sensitive to noise and ripple, a filtering capacitor may be added to the DC/DC output end and input end to
reduce the noise and ripple. However, the capacitance of the output filter capacitor must be proper. If the capacitance is too big, a
startup problem might arise. For every channel of output, provided the safe and reliable operation is ensured, the greatest
capacitance of its filter capacitor sees the external capacitor table. To get an extremely low ripple, an “LC” filtering network may be
connected to the input and output ends of the DC/DC converter, which may produce a more significant filtering effect. It should also
be noted that the inductance and the frequency of the “LC” filtering network should be staggered with the DC/DC frequency to avoid
mutual interference (Figure 1).
ue
d
1.
is
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Figure 2
nt
Output Voltage Regulation and Over-voltage Protection Circuit
The simplest device for output voltage regulation, over-voltage and over-current protection is a linear voltage regulator with overheat
protection that is connected to the input or output end in series (Figure 2).
D
4.
in
Figure 1
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CUI Inc │ SERIES: VASD0.25-DIP │ DESCRIPTION: DC-DC CONVERTER
date 09/07/2012 │ page 5 of 5
REVISION HISTORY
description
date
1.0
initial release
02/91/2008
1.01
new template applied; V-Infinity branding removed; VASD0.25-S12D15-DIP, VASD0.25-S24-D5-DIP, VASD0.25-S24-D9-DIP, VASD0.25S24-D12-DIP and VASD0.25-S24-D15-DIP discontinued
08/07/2012
1.02
24 V input references removed
09/04/2012
discontinued
1.03
d
rev.
09/25/2012
D
is
co
nt
in
ue
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
[email protected]
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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