Datasheet

For more information, please visit the product page.
date
10/31/2012
page
1 of 5
SERIES: VAT1-SMT │ DESCRIPTION: DC-DC CONVERTER
1 W isolated output
industry standard 10 pin SMT package
dual unregulated outputs
1,000 V isolation
short circuit protection
UL safety approvals (some models)
wide temperature (-40~85°C)
efficiency up to 78%
U
•
•
•
•
•
•
•
•
ED
FEATURES
input
voltage
MODEL
typ
(Vdc)
range
(Vdc)
(Vdc)
5
4.5~5.5
output
current
output
power
ripple
and noise1
efficiency
min
(mA)
max
(mA)
max
(W)
max
(mVp-p)
typ
(%)
±5
±10
±100
1
75
71
TI
VAT1-S5-D5-SMT
output
voltage
N
RoHS
VAT1-S5-D9-SMT
5
4.5~5.5
±9
±6
±56
1
75
77
VAT1-S5-D12-SMT
5
4.5~5.5
±12
±5
±42
1
75
78
5
4.5~5.5
±15
±4
±33
1
75
78
12
10.8~13.2
±5
±10
±100
1
75
71
VAT1-S12-D9-SMT
12
10.8~13.2
±9
±6
±56
1
75
73
VAT1-S12-D12-SMT
12
10.8~13.2
±12
±5
±42
1
75
74
N
VAT1-S5-D15-SMT
VAT1-S12-D5-SMT
12
10.8~13.2
±15
±4
±33
1
75
74
24
21.6~26.4
±5
±10
±100
1
75
72
24
21.6~26.4
±9
±6
±56
1
75
74
24
21.6~26.4
±12
±5
±42
1
75
76
VAT1-S24-D9-SMT
VAT1-S24-D12-SMT
VAT1-S24-D15-SMT
24
21.6~26.4
±15
±4
±33
1
75
77
24
21.6~26.4
±24
±2
±21
1
75
78
IS
C
VAT1-S24-D24-SMT
O
VAT1-S12-D15-SMT
VAT1-S24-D5-SMT
Notes:
1. ripple and noise are measured at 20 MHz BW
D
PART NUMBER KEY
VAXT1 - SXX - DXX -SMT - X
Base Number
X indicates ALT PIN
configuration, see page 3
Output Voltage
Input Voltage
Package Options
"blank" = standard
TR = Tape & Reel
Packaging Style
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CUI Inc │ SERIES: VAT1-SMT │ DESCRIPTION: DC-DC CONVERTER
date 10/31/2012 │ page 2 of 5
INPUT
conditions/description
min
typ
max
units
operating input voltage
5 V model
12 V model
24 V model
4.5
10.8
21.6
5
12
24
5.5
13.2
26.4
Vdc
Vdc
Vdc
conditions/description
min
typ
max
units
1.2
%
15
10
10
10
10
%
%
%
%
%
OUTPUT
for Vin change of 1%
load regulation
measured from 10% load to full load
5 V model
9 V model
12 V model
15 V model
24 V model
voltage accuracy
see derating curves
switching frequency
100% load, 5 and 12 V input
100% load, 24 V input
temperature coefficient
TI
PROTECTIONS
parameter
conditions/description
short circuit protection
SAFETY AND COMPLIANCE
12.8
8.3
6.8
6.3
6.0
N
line regulation
U
parameter
ED
parameter
min
kHz
kHz
±0.03
%/°C
typ
units
1
s
max
units
for 1 minute at 1 mA max.
1,000
Vdc
isolation resistance
at 500 Vdc
1,000
MΩ
safety approvals1
UL 60950-1 (E222736)
3,500,000
hours
N
conditions/description
isolation voltage
Notes:
O
MTBF
typ
max
parameter
RoHS compliant
min
100
500
yes
1. 24 V input models UL 60950-1 pending
IS
C
ENVIRONMENTAL
parameter
conditions/description
min
typ
max
units
operating temperature
-40
85
°C
storage temperature
-55
125
°C
storage humidity
non-condensing
temperature rise
at full load
lead temperature
1.5 mm from case for 10 seconds
D
15
cui.com
95
%
25
°C
260
°C
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CUI Inc │ SERIES: VAT1-SMT │ DESCRIPTION: DC-DC CONVERTER
date 10/31/2012 │ page 3 of 5
DERATING CURVES
2. output voltage vs. output current
ED
1. output power vs. ambient temperature
+10%
Output Voltate (%)
Load (%)
100
80
60
40
20
-20
0
20
40
60
85
105 120
-7.5%
N
conditions/description
dimensions
0.600 x 0.441 x 0.250 (15.24 x 11.22 x 6.50 mm)
min
case material
plastic (UL94-V0)
typ
100%
1.70
O
IS
C
D
PIN CONNECTIONS
cui.com
max
units
inch
N
TI
parameter
units: mm [inches]
tolerance: ±0.15 [±0.006]
pin section tolerance: ±0.10 mm [±0.004]
50%
Output Current (%)
MECHANICAL
MECHANICAL DRAWING
-2.5%
10%
Ambient Temperature (°C)
weight
+2.5%
Voltage
U
-40
+5%
Nominal
PIN
FUNCTION
ALT FUNCTION
1
-Vin
-Vin
2
+Vin
+Vin
4
COM
COM
5
-Vo
-Vo
+Vo
7
+Vo
10
NC
NC
3,6,8,9
NC
No PIN
g
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CUI Inc │ SERIES: VAT1-SMT │ DESCRIPTION: DC-DC CONVERTER
date 10/31/2012 │ 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).
U
ED
1.
Figure 2
Vin
REG
O
GND
0V
-Vo
REG
+Vo
REG
-Vo
0V
DC DC
External Capacitor Table
It is not recommended to connect any external capacitor in the application field with less than 0.5 W output.
Table 1
Vin
(Vdc)
Cout
(μF)
Vout
(Vdc)
3.3/5
4.7
±3.3/±5
4.7
12
2.2
±9
2.2
Cout
(μF)
24
1
±12
1
--
--
±15
1
D
IS
C
5.
Cout
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).
N
4.
DC DC
Cin
Cout
TI
GND
+Vo
N
Figure 1
Vin
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CUI Inc │ SERIES: VAT1-SMT │ DESCRIPTION: DC-DC CONVERTER
date 10/31/2012 │ page 5 of 5
REVISION HISTORY
description
date
01/14/2011
1.0
initial release
1.01
new template applied
1.02
V-Infinity branding removed
1.03
added TR package option
ED
rev.
04/11/2012
09/05/2012
10/31/2012
D
IS
C
O
N
TI
N
U
The revision history provided is for informational purposes only and is believed to be accurate.
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20050 SW 112th Ave.
Tualatin, OR 97062
800.275.4899
Fax 503.612.2383
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[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.