Datasheet

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date
11/01/2012
page
1 of 5
SERIES: VBT2-SMT │ DESCRIPTION: DC-DC CONVERTER
2 W isolated output
industry standard 14 pin SMT package
single unregulated outputs
1,000 V isolation
short circuit protection
wide temperature (-40~85°C)
efficiency up to 85%
U
•
•
•
•
•
•
•
ED
FEATURES
RoHS
typ
(Vdc)
output
voltage
range
(Vdc)
(Vdc)
5
4.5~5.5
5
5
4.5~5.5
9
min
(mA)
max
(mA)
output
power
ripple
and noise1
efficiency
max
(W)
max
(mVp-p)
typ
(%)
40
400
2
150
80
23
222
2
150
82
TI
VBT2-S5-S5-SMT
VBT2-S5-S9-SMT
output
current
N
input
voltage
MODEL
VBT2-S5-S12-SMT
5
4.5~5.5
12
17
167
2
150
84
VBT2-S5-S15-SMT
5
4.5~5.5
15
14
133
2
150
84
VBT2-S12-S5-SMT
12
10.8~13.2
5
40
400
2
150
82
VBT2-S12-S9-SMT
12
10.8~13.2
9
23
222
2
150
83
12
10.8~13.2
12
17
167
2
150
85
12
10.8~13.2
15
14
133
2
150
85
1. ripple and noise are measured at 20 MHz BW
IS
C
O
Notes:
N
VBT2-S12-S12-SMT
VBT2-S12-S15-SMT
D
PART NUMBER KEY
VBT2 - SXX - SXX -SMT - X
Output Voltage
Base Number
Input Voltage
Package Options
"blank" = standard
TR = Tape & Reel
Packaging Style
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CUI Inc │ SERIES: VBT2-SMT │ DESCRIPTION: DC-DC CONVERTER
date 11/01/2012 │ page 2 of 5
INPUT
conditions/description
min
typ
max
units
operating input voltage
5 V model
12 V model
4.5
10.8
5
12
5.5
13.2
Vdc
Vdc
input surge voltage
1 s max.
9
18
Vdc
Vdc
input filter
C filter
max
units
5 V model
12 V model
-0.7
-0.7
OUTPUT
line regulation
for Vin change of 1%
load regulation
measured from 10%
load to full load
voltage accuracy
see derating curves
switching frequency
100% load
temperature coefficient
100% load
min
5 V model
9 V model
12 V model
15 V model
PROTECTIONS
conditions/description
short circuit protection
SAFETY AND COMPLIANCE
conditions/description
isolation voltage
for 1 minute at 1 mA max.
isolation resistance
at 500 Vdc
yes
min
O
RoHS compliant
min
N
parameter
MTBF
12.8
8.3
6.8
6.3
TI
parameter
typ
U
conditions/description
N
parameter
ED
parameter
±1.2
%
15
10
10
10
%
%
%
%
±0.03
%/°C
max
units
1
s
max
units
70
typ
typ
kHz
1,000
Vdc
1,000
MΩ
3,500,000
hours
ENVIRONMENTAL
parameter
min
IS
C
operating temperature
conditions/description
storage temperature
storage humidity
non-condensing
temperature rise
at full load
lead temperature
1.5 mm from case for 10 seconds
typ
max
units
-40
85
°C
-55
125
°C
95
D
25
cui.com
%
°C
300
°C
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CUI Inc │ SERIES: VBT2-SMT │ DESCRIPTION: DC-DC CONVERTER
date 11/01/2012 │ 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
0.700 x 0.500 x 0.236 (17.78 x 12.70 x 6.00 mm)
min
case material
plastic (UL94-V0)
typ
100%
2.1
O
IS
C
PIN CONNECTIONS
D
PIN
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FUNCTION
1
GND
2
+Vin
5
NC
6
0V
7
+Vo
10
NC
others
NC
max
units
inch
N
TI
parameter
units: mm [inches]
tolerance: ±0.25 [±0.010]
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
g
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CUI Inc │ SERIES: VBT2-SMT │ DESCRIPTION: DC-DC CONVERTER
date 11/01/2012 │ 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.
N
Figure 1
+Vo
Vin
DC DC
Cin
GND
TI
0V
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).
Vin
REG
N
4.
Cout
Figure 2
REG
O
GND
0V
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)
Cin
(μF)
Vout
(Vdc)
Cout
(μF)
5
4.7
5
10
12
2.2
9
4.7
--
--
12
2.2
--
--
15
1
D
IS
C
5.
+Vo
DC DC
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CUI Inc │ SERIES: VBT2-SMT │ DESCRIPTION: DC-DC CONVERTER
date 11/01/2012 │ page 5 of 5
REVISION HISTORY
description
date
02/08/2008
1.0
initial release
1.01
new template applied
1.02
V-Infinity branding removed
1.03
added TR package option
ED
rev.
04/20/2012
09/06/2012
11/01/2012
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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