1. Ripple and noise are measured at 20 MHz BW by “parallel cable” method with 1 μF ceramic and 10 μF electrolytic capacitors on the output.
*. Discontinued
PART NUMBER KEY
VAT2 - SXX - DXX -SMT -
X
Base Number
Output Voltage
Package Options
"blank" = standard
TR = Tape & Reel
Input Voltage
Packaging Style
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SERIES:
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DESCRIPTION:
DC-DC CONVERTER
date
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page
2 of 5
INPUT
parameter
operating input voltage
conditions/description
5 Vdc model
12 Vdc model
min
4.5
10.8
typ
5
12
max
5.5
13.2
units
Vdc
Vdc
OUTPUT
parameter
line regulation
load regulation
voltage accuracy
switching frequency
temperature coefficient
conditions/description
for Vin change of 1%
measured from 10%
load to full load
see derating curves
100% load
100% load
70
±0.03
kHz
%/°C
5 Vdc models
9 Vdc models
12 Vdc models
15 Vdc models
12.8
8.3
6.8
6.3
min
typ
max
±1.2
15
10
10
10
units
%
%
%
%
%
PROTECTIONS
parameter
short circuit protection
conditions/description
min
typ
max
1
units
s
SAFETY AND COMPLIANCE
parameter
isolation voltage
isolation resistance
conducted emissions
ESD
MTBF
RoHS
conditions/description
input to output for 1 minute at 1 mA max.
input to output at 500 Vdc
IEC/EN 61000-4-2, class B, contact ±6kV
as per MIL-HDFK-217 at 25 °C
2011/65/EU
3,500,000
hours
min
1,000
1,000
typ
max
units
Vdc
MΩ
CISPR22/EN55022, class A (external circuit required, see Figure 1)
ENVIRONMENTAL
parameter
operating temperature
storage temperature
storage humidity
temperature rise
reflow soldering
non-condensing
at full load
see reflow soldering profile
25 0
24 5
21 7
20 0
conditions/description
see derating curve
min
-40
-55
typ
max
105
125
95
25
245
units
°C
°C
%
°C
°C
Peak .Temp 245
˚C
( Max.)
Tem peratur e (
˚C
)
60 Sec Max
( >217
˚C
)
15 0
10 0
50
0
Tim e (se c.)
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DESCRIPTION:
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date
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MECHANICAL
parameter
dimensions
case material
weight
conditions/description
17.78 x 12.70 x 6.00 (0.700 x 0.500 x 0.236 inch)
plastic (UL94-V0)
2.1
g
min
typ
max
units
mm
MECHANICAL DRAWING
units: mm [inches]
tolerance: ±0.25 [±0.010]
pin section tolerance: ±0.10 [±0.004]
PIN CONNECTIONS
PIN
1
2
5
6
7
10
others
FUNCTION
GND
+Vin
-Vo
0V
+Vo
-Vo
NC
DERATING CURVES
1. output power vs. ambient temperature
+10%
2. output voltage vs. output current
Output Voltate (%)
100
80
60
40
20
+5%
Nominal
Voltage
+2.5%
-2.5%
-7.5%
Load (%)
-40
-20
0
20
40
60
85
105 120
10%
50%
100%
Ambient Temperature (°C)
Output Current (%)
EMC RECOMMENDED CIRCUIT
Figure 1
Table 1
Recommended external circuit
components
Vout
(Vdc)
C1
2.2μF/50V
2.2μF/50V
2.2μF/50V
2.2μF/50V
C2
4.7μF
2.2μF
1μF
0.47μF
Vin
C1
GND
V in
+Vo
C2
LOAD
DC/DC
GND
-Vo
(0V)
5
9
12
15
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APPLICATION NOTES
1.
Output load requirement
To ensure this module can operate efficiently and reliably, the minimum output load may not be less than 10% of the full load during
operation. If the actual output power is low, connect a resistor at the output end in parallel to increase the load.
Overload Protection
Under normal operating conditions, the output circuit of this product has no protection against overload. The simplest method to add
this is to add a circuit breaker to the circuit.
Recommended circuit
If you want to further decrease the input/output ripple, you can increase the capacitance accordingly or choose capacitors with low
ESR (see Figure 2 & Table 2). However, the capacitance of the output filter capacitor must be appropriate. If the capacitance is too
high, a startup problem might arise. For every channel of the output, to ensure safe and reliable operation, the maximum capacitance
must be less than the maximum capacitive load (see Table 3).
Figure 2
2.
3.
Vin
Cin
GND
Table 2
Vin
(Vdc)
5
12
-
-
Note:
DC
Cout
(µF)
4.7
2.2
1
0.47
DC
Dual Vout
(Vdc)
5
9
Cout
Cout
Table 3
+Vo
0V
-Vo
100
100
100
100
Cin
(µF)
4.7
2.2
-
-
Dual Vo
(Vdc)
±5
Max. Capacitive Load
1
(μF)
Vin
±9
±12
±15
REG
REG
+Vo
0V
It’s not recommended to connect any external capacitors in
applications with less than 0.5 watt output.
GND
DC
DC
Note:
12
15
REG
1. For each output.
-Vo
4.
Output Voltage Regulation and Over-voltage Protection Circuit
The device for output voltage regulation, over-voltage and over-current protection is a linear regulator and a capacitor filtering net-
work with overheat protection which can be connected to the input or output end in series (see Figure 3). The recommended capaci-
tance of its filter capacitor (see Table 3), and the linear regulator is based on the actual voltage and current required.
Vin
Cin
GND
DC
DC
Cout
Cout
+Vo
0V
Figure 3
-Vo
+Vo
0V
Vin
GND
REG
REG
DC
DC
REG
-Vo
Note:
1. Operation under minimum load will not damage the converter; however, they may not meet all specifications listed.
2. Max. capacitive load tested at input voltage range and full load.
3. It is recommended to use either ceramic capacitors or electrolytic capacitors on the input and the output. Using tantalum capacitors may increase the risk of failure.
4. All specifications measured at: Ta=25°C, humidity<75%, nominal input voltage and rated output load, unless otherwise specified.
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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