1. Ripple and noise are measured at 20 MHz BW with 220
μF
aluminum capacitor accross the input. Add 470
μF
aluminum, 1
μF
ceramic, 10
μF
tantalum capacitors across
output.
PART NUMBER KEY
VIFSD1 -SXX -SXX -SIP
Base Number
Input Voltage
Output Voltage
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SERIES:
VIFSD1-SIP
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DESCRIPTION:
DC-DC CONVERTER
date
09/04/2012
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page
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INPUT
parameter
operating input voltage
no load power consumption
conditions/description
5 V model
12 V model
24 V model
10% nominal power (typical)
min
4.75
11.4
22.8
typ
5
12
24
max
5.75
12.6
25.2
units
Vdc
Vdc
Vdc
OUTPUT
parameter
line regulation
load regulation
voltage accuracy
switching frequency
temperature coefficient
conditions/description
For Vin change of 1%, full load
10% to 100% full load
100% full load
100% load, nominal input
100
0.03
min
typ
max
0.25
1
±3
units
%
%
%
kHz
%/°C
PROTECTIONS
parameter
short circuit protection
conditions/description
continuous, automatic recovery
min
typ
1
max
units
s
SAFETY AND COMPLIANCE
parameter
isolation voltage
isolation resistance
RoHS compliant
MTBF
conditions/description
tested for 1 minute
at 500 Vdc
yes
3,500,000
hrs
min
3,000
1,000
typ
max
units
Vdc
MΩ
ENVIRONMENTAL
parameter
case operating temperature
storage temperature
storage humidity
temperature rise
lead temperature
Notes:
conditions/description
min
-40
-55
typ
max
85
125
95
units
°C
°C
%
°C
°C
non-condensing
100% load
1.5 mm from the case for 10 seconds
15
25
300
1. All specifications measured at TA=25°C, humidity <75%, nominal input voltage and rated output load unless otherwise specified.
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SERIES:
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DESCRIPTION:
DC-DC CONVERTER
date
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DERATING CURVES
100
80
60
40
20
Load (%)
-40
-20
0
20
40
60 71 80
100
120
Ambient Temperature (°C)
MECHANICAL
parameter
dimensions
case material
weight
conditions/description
0.77 x 0.24 x 0.4 inch (19.6 x 6.0 x 10.2 mm)
Plastic (UL94-V0)
2.1
g
min
typ
max
units
MECHANICAL DRAWING
Note: All Pins on a 2.54mm pitch; All Pin diameters are 0.50 mm; all dimensions in mm.
Side View
Layout
2.54
1 2
4
PIN CONNECTIONS
Bottom View
1 2
4
PIN
1
2
4
6
FUNCTION
+Vin
-Vin
-Vo
+Vo
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SERIES:
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DESCRIPTION:
DC-DC CONVERTER
date
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APPLICATION NOTES
1.
Input
fi
ltering
To reduce the reflected ripple current and minimize EMI, especially when the converter input is more than 2” away from the DC
source, it is recommended to connect a low ESR electrolytic capacitor between Vin and Gnd. The values suggested are as shown in
Table 1. If additional
fi
ltering is required, the capacitance may be increased, or expanded to an LC network as shown in Figure 1.
Input Voltage
(Vdc)
External Input Capacitance
(μF)
4.7
2.2
1.0
Table 1
5V
12 V
24 V
2.
Recommended Circuit
The VIFSD1-SIP series has been tested according to the following recommended testing circuit. This series should be tested under
load. (see Figure 1)
L
L
Figure 1
+Vin
C
+Vout
DC DC
C
-Vin
-Vout
3.
Output
fi
ltering
An output capacitor as shown in Table 2 may be used to reduce output ripples and noise. requirements as shown in Table 2. Output
capacitance may be increased for additional
fi
ltering, but should not exeed 10μF. It can also be expanded to an LC network as in
Figure 1.
Vout
(Vdc)
5 V
External Input Capacitance
(μF)
4.7
2.2
1.0
0.47
Table 2
9 V
12 V
15 V
4.
Minimum loading
The converter needs a minimum of 10% loading to maintain output regulation. Operation under no-load conditions will not cause
immediate damages but may reduce reliability, and cause performance not to meet specifications.
Protection
The converter has minimal protection against input over-voltage or output over-load, and may be permanently damaged if exposed to
these conditions. An input clamping device can be used for input voltage limiting. An input fuse or an output fuse can also be used to
protect against over-loading.
Unregulated input
As
fi
xed input converters, this series can accept voltages within a limited range of the nominal input. Otherwise the converter may not
function properly or may be damaged. An optional regulator can be used at the input to bring voltage within regulation, as shown in
Figure 2.
Figure 2
+Vin
-Vin
REG
5.
6.
+Vout
DC DC
-Vout
7.
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.
When the environment temperature is higher than 70°C, the product output power should be less then 60% of the rated power.
cui.com
CUI Inc
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SERIES:
VIFSD1-SIP
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DESCRIPTION:
DC-DC CONVERTER
date
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page
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REVISION HISTORY
rev.
1.0
1.01
1.02
description
initial release
new template applied
V-Infinity branding removed
date
01/01/2006
07/13/2011
09/04/2012
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
CUI offers a two (2) year limited warranty. Complete warranty information is listed on our website.
Fax 503.612.2383
cui.com
techsupport@cui.com
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
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