VEFT1-S12-S3.3-SMT-TR 数据手册
For more information, please visit the product page.
date
07/01/2013
page
1 of 5
SERIES: VEFT1-S-SMT │ DESCRIPTION: DC-DC CONVERTER
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%
U
•
•
•
•
•
•
•
•
ED
FEATURES
MODEL
input
voltage
output
voltage
N
RoHS
output
current
efficiency
max
(W)
max
(mVp-p)
typ
(%)
(Vdc)
VEFT1-S3.3-S3.3-SMT
3.3
3.00~3.60
3.3
30
300
1
100
72
VEFT1-S3.3-S5-SMT
3.3
3.00~3.60
5
20
200
1
100
73
VEFT1-S5-S5-SMT
5
4.5~5.5
5
20
200
1
100
70
VEFT1-S5-S9-SMT
5
4.5~5.5
9
12
111
1
100
75
VEFT1-S5-S12-SMT
5
4.5~5.5
12
9
83
1
100
78
VEFT1-S5-S15-SMT
5
4.5~5.5
15
7
67
1
100
80
VEFT1-S12-S3.3-SMT
12
10.8~13.2
3.3
30
300
1
100
75
VEFT1-S12-S5-SMT
12
10.8~13.2
5
20
200
1
100
70
VEFT1-S12-S9-SMT
12
10.8~13.2
9
12
111
1
100
76
12
9
83
1
100
79
N
12
10.8~13.2
12
10.8~13.2
15
7
67
1
100
81
24
21.6~26.4
3.3
30
300
1
100
73
24
21.6~26.4
5
20
200
1
100
79
VEFT1-S24-S9-SMT
24
21.6~26.4
9
12
111
1
100
80
VEFT1-S24-S12-SMT
24
21.6~26.4
12
9
83
1
100
81
VEFT1-S24-S15-SMT
24
21.6~26.4
15
7
67
1
100
79
VEFT1-S24-S24-SMT
24
21.6~26.4
24
5
42
1
100
80
IS
C
VEFT1-S24-S5-SMT
O
VEFT1-S24-S3.3-SMT
TI
range
(Vdc)
VEFT1-S12-S15-SMT
max
(mA)
ripple
and noise1
typ
(Vdc)
VEFT1-S12-S12-SMT
min
(mA)
output
power
Notes:
1. ripple and noise are measured at 20 MHz BW
D
PART NUMBER KEY
VEFT1 - SXX - SXX -SMT - X
Output Voltage
Base Number
Input Voltage
Packaging Style
cui.com
Package Options
"blank" = standard
TR = Tape & Reel
For more information, please visit the product page.
CUI Inc │ SERIES: VEFT1-S-SMT │ DESCRIPTION: DC-DC CONVERTER
date 07/01/2013 │ page 2 of 5
INPUT
conditions/description
min
typ
max
units
operating input voltage
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
Vdc
Vdc
Vdc
Vdc
parameter
conditions/description
min
typ
line regulation
for Vin change of 1%, 3.3 V model
for Vin change of 1%, all other models
OUTPUT
measured from 10%
load to full load
voltage accuracy
see derating curves
switching frequency
100% load, 3.3, 5 and 12 V input
100% load, 24 V input
temperature coefficient
parameter
TI
PROTECTIONS
U
load regulation
15
12.8
8.3
6.8
6.3
6.0
N
3.3 V model
5 V model
9 V model
12 V model
15 V model
24 V model
ED
parameter
conditions/description
short circuit protection
SAFETY AND COMPLIANCE
min
units
%
%
20
15
10
10
10
10
%
%
%
%
%
%
100
500
kHz
kHz
±0.03
%/°C
typ
units
1
s
max
units
isolation voltage
for 1 minute at 1 mA max.
3,000
Vdc
isolation resistance
at 500 Vdc
1,000
MΩ
safety approvals
UL
3,500,000
hours
Notes:
O
RoHS compliant
N
conditions/description
MTBF
typ
max
parameter
1
min
max
±1.5
±1.2
yes
1. VEFT1-S5-S5/9/12/15 and VEFT1-S12-S5/9/12/15 only
IS
C
ENVIRONMENTAL
parameter
conditions/description
min
operating temperature
storage temperature
non-condensing
temperature rise
at full load
reflow soldering
see reflow soldering profile
typ
units
85
°C
-55
125
°C
95
%
25
°C
260
°C
15
Peak Temperature
260°C for 10 Sec. Max
250
200
Temperature (°C)
D
storage humidity
max
-40
90 Sec. max
(>220°C)
150
100
50
0
Time (Seconds)
cui.com
220°C
For more information, please visit the product page.
CUI Inc │ SERIES: VEFT1-S-SMT │ DESCRIPTION: DC-DC CONVERTER
date 07/01/2013 │ 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
parameter
conditions/description
dimensions
15.24 x 11.20 x 6.50 (0.600 x 0.441 x 0.256 inch)
case material
plastic (UL94-V0)
min
typ
MECHANICAL DRAWING
(Side View)
O
IS
C
12 11 10
8
3
5
7
2.54 [0.100]
3
5
6
2.10 [0.083]
1
2
2.54 [0.100]
11.20 [0.441]
6
PIN CONNECTIONS
PIN
A
8.50 [0.335]
A
0.25 [0.010]
1.35 [0.053]
8
7
(Top View)
1 2
12 11 10
10.10 [0.398]
15.24 [0.600]
12.70 [0.500]
2.54 [0.100]
5°max
cui.com
FUNCTION
1
GND
2
+Vin
5
0V
6
NC
8
+Vo
others
NC
units
g
1.00 [0.039]
6.25 [0.246]
0.60 [0.024]
max
1.71
N
units: mm [inches]
tolerance: ±0.15 [±0.006]
pin section tolerance: ±0.10 [±0.004]
0.25 [0.010]
100%
mm
TI
weight
7.50 [0.295]
50%
Output Current (%)
MECHANICAL
D
-2.5%
10%
Ambient Temperature (°C)
6.50 [0.256]
+2.5%
Voltage
U
-40
+5%
Nominal
For more information, please visit the product page.
CUI Inc │ SERIES: VEFT1-S-SMT │ DESCRIPTION: DC-DC CONVERTER
date 07/01/2013 │ page 4 of 5
APPLICATION NOTES
ED
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 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.
DC DC
Cin
+Vo
Cout
0V
TI
GND
L
N
Figure 1
L
Vin
U
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).
4. 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).
R EG
N
Vi n
GND
O
Figure 2
REG
+Vo
DC DC
0V
5. External Capacitor Table
It is not recommended to connect any external capacitor in the application field with less than 0.5 W output.
Cin
(µF)
Vout
(Vdc)
Cout
(µF)
3.3/5
4.7
5
10
12
2.2
9
4.7
24
1
12
2.2
--
--
15
1
--
--
24
0.47
D
IS
C
Table 1
Vin
(Vdc)
Note:
All specifications measured at 25°C, humidity
VEFT1-S12-S3.3-SMT-TR 价格&库存
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