VEFT1-S-SMT [CUI]
DC-DC CONVERTER;
| 型号： | VEFT1-S-SMT |
| 厂家： | 
CUI INC |
| 描述： | DC-DC CONVERTER DC-DC转换器 |
| 文件： | 总5页 (文件大小：530K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
For more information, please visit the product page.
date 07/01/2013
page 1 of 5
SERIES: VEFT1-S-SMT │ DESCRIPTION: DC-DC CONVERTER
FEATURES
• 1 W isolated output
• industry standard 12 pin SMT package
• single unregulated outputs
• 3,000 V isolation
• short circuit protection
• UL safety approvals (some models)
• wide temperature (-40~85°C)
• efficiency up to 81%
RoHS
input
voltage
output
voltage
oput
uent
output
power
max
ripple
efficiency
MODEL
and noise1
typ
range
min
max
max
typ
(Vdc)
(Vdc)
(Vdc)
3.3
5
(mA)
30
20
2
12
9
(A)
(W)
(mVp-p)
(%)
VEFT1-S3.3-S3.3-SMT
VEFT1-S3.3-S5-SMT
VEFT1-S5-S5-SMT
3.3
3.3
5
3.00~3.60
3.00~3.60
4.5~5.5
300
200
200
111
83
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
72
73
70
75
78
80
75
70
76
79
81
73
79
80
81
79
80
5
VEFT1-S5-S9-SMT
5
4.5~5.5
9
VEFT1-S5-S12-SMT
VEFT1-S5-S15-SMT
VEFT1-S12-S3.3-SMT
VEFT1-S12-S5-SMT
VEFT1-S12-S9-SMT
VEFT1-S12-S12-SMT
VEFT1-S12-S15-SMT
VEFT1-S24-S3.3-SMT
VEFT1-S24-S5-SMT
VEFT1-S24-S9-SMT
VEFT1-S24-S12-SM
VEFT1-S24-S15-SMT
VEFT1-S24-S24-ST
5
4.5~5.5
12
1
3.3
5
5
4.5~5.5
7
67
12
12
12
12
12
24
24
24
24
24
24
10.8~13.2
21.4
21.6~26.4
2.6~26.4
21.6~26.4
21.6~26.4
21.6~26.4
30
20
12
9
300
200
111
83
9
12
15
3.3
5
7
67
30
20
12
9
300
200
111
83
9
12
15
24
7
67
5
42
Notes:
1pple and noise are measureat 20 MHz BW
PART NUMBER KEY
VEFT1 - SXX - SXX -SMT - X
Base Number
Output Voltage
Package Options
"blank" = standard
TR = Tape & Reel
Input Voltage
Packaging Style
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CUI Inc │ SERIES: VEFT1-S-SMT │ DESCRIPTION: DC-DC CONVERTER
date 07/01/2013 │ page 2 of 5
INPUT
parameter
conditions/description
min
typ
max
units
3.3 V model
5 V model
12 V model
24 V model
3.00
4.5
10.8
21.6
3.3
5
12
24
3.60
5.5
13.2
26.4
operating input voltage
OUTPUT
parameter
conditions/description
min
typ
ma
units
for Vin change of 1%, 3.3 V model
for Vin change of 1%, all other models
1.5
±.2
%
%
line regulation
3.3 V model
5 V model
9 V model
12 V model
15 V model
24 V model
15
12.8
8.3
6.8
3
6.0
20
15
10
10
10
10
%
%
%
%
%
%
measured from 10%
load to full load
load regulation
voltage accuracy
see derating curves
100% load, 3.3, 5 and 12 V input
100% load, 24 V input
00
500
kHz
kHz
switching frequency
temperature coefficient
±0.03
%/°C
PROTECTIONS
parameter
conditions/description
min
typ
max
units
short circuit protection
1
s
SAFETY AND COMPLIANCE
parameter
conditions/descrio
min
typ
max
units
Vdc
isolation voltage
isolation resistance
safety approvals1
MTBF
for 1 minute at 1 mA mx.
3,000
1,000
at 500 Vdc
UL
MΩ
3,500,000
hours
RoHS compliant
yes
Notes:
1. VEFT1-S5-S5/9/12/15 and VT1-S12-S5/9/1
ENVIRONMENTAL
parameter
conditionsdescription
min
-40
-55
typ
max
85
units
°C
operating temperatue
storage temperate
storage humidity
temperaturise
125
95
°C
non-condensing
%
at full load
15
25
°C
reflow solderg
see reflow soldering profile
260
°C
Peak Temperature
260°C for 10 Sec. Max
250
220°C
200
150
100
90 Sec. max
(>220°C)
50
0
Time (Seconds)
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CUI Inc │ SERIES: VEFT1-S-SMT │ DESCRIPTION: DC-DC CONVERTER
date 07/01/2013 │ page 3 of 5
DERATING CURVES
1. output power vs. ambient temperature
2. output voltage vs. output current
+10%
+5%
100
80
-2.5%
Nominal
Voltage
60
7.5%
40
20
-40
-20
0
20
40
60
85
105 120
10%
50%
100%
Ambient Temperature (°C)
Out Current (%)
MECHANICAL
parameter
dimensions
conditions/description
min
yp
max
units
15.24 x 11.20 x 6.50 (0.600 x 0.441 x 0.25ch)
plastic (UL94-V0)
mm
case material
weight
1.71
g
MECHANICAL DRAWING
units: mm [inches]
tolerance: ±0.15 [±0.006]
pin section tolerance: ±0.10 [±0.004]
1.00 [0.039]
(Side View)
6.50 [0.256]
0.25 [0.010]
12 11 10
8
7
2.54 [0.100]
2.10 [0.083]
10.10 [0.398]
3
5
6
1
2
15.24 [0.600]
12.70 [0.500]
2.54 [0.100]
2.54 [0.100]
12 11
7
6
(Top View)
7.50 [0.295]
11.20 [0.441]
2
3
5
PIN CONNECTIONS
PIN
FUNCTION
1
GND
+Vin
0 V
2
A
5
8.50 [0.335]
A
6
8
NC
+Vo
NC
0.25 [0.010]
others
5°max
1.35 [0.053]
cui.com
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CUI Inc │ SERIES: VEFT1-S-SMT │ DESCRIPTION: DC-DC CONVERTER
date 07/01/2013 │ page 4 of 5
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
minimum output load is not less than 10% load. If the actual load is less than the specified minimum load, the output
increase sharply while its efficiency and reliability will reduce greatly. If the actual output power is very small, please ad
appropriate resistor as extra loading.
2. Overload Protection
Under normal operating conditions, the output circuit of these products has no protection against over-currt and sort-circuits. he
simplest method is to connect a self-recovery fuse in series at the input end or add a circuit breaker to the ciuit.
3. Filtering
In some circuits which are sensitive to noise and ripple, a filtering capacitor may be added to the DC/DC oput end ninput end to
reduce the noise and ripple. However, the capacitance of the output filter capacitor must be proper. If the caacitance is too big, a
startup problem might arise. For every channel of output, provided the safe and reliable operatn is ensured, e greatest
capacitance of its filter capacitor sees the external capacitor table. To get an extremely low ripplean “LC” filterg network may be
connected to the input and output ends of the DC/DC converter, which may produce a morsignifict filtering effect. It should also
be noted that the inductance and the frequency of the “LC” filtering network should be stagged with e D/DC frequency to avoid
mutual interference (Figure 1).
L
L
+Vo
Vin
GND
Figure 1
out
Cin
DC DC
0V
4. Output Voltage Regulation and Over-voltage Protection Circuit
The simplest device for output voltage regulation, over-voltage and ovecurrent protection is a linear voltage regulator with overheat
protection that is connected to the input or output end in sries (Figure 2)
REG
+Vo
0V
Vi n
R EG
Figure 2
D
DC
GND
5. External Capacitor Table
It is not recommended to connct any eor in the application field with less than 0.5 W output.
Vin
(Vdc)
Cin
(µF)
Vout
(Vdc)
Cout
(µF)
3.3/5
12
4.7
2.2
1
5
10
4.7
2.2
1
able 1
9
24
12
15
24
--
--
--
--
0.47
Note:
All specifications measured at 25°C, humidity <75%, nominal input voltage, and full load unless otherwise noted.
cui.com
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CUI Inc │ SERIES: VEFT1-S-SMT │ DESCRIPTION: DC-DC CONVERTER
date 07/01/2013 │ page 5 of 5
REVISION HISTORY
rev.
description
date
1.0
initial release
new template applied
10/01/2009
04/12/012
08/7/2012
0905/202
11/01012
7/01/23
1.01
1.02
1.03
1.04
1.05
V-Infinity branding removed, VEFT1-S12-S24-SMT discontinued
picture updated
added TR package option
discontinued VEFT1-S5-S3.3-SMT and VEFT1-S5-S24-SMT models
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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