CUI VBT2-S12-S15-SMT

rev.
date
02/2008
features
· isolated 2
Designed to convert fixed voltages into an isolated voltage, the
VBT2-SMT series is well suited for
providing board-mount local supplies in a wide range of applications, including mixed analog/digital circuits, test & measurement
equip., process/machine controls,
datacom/telecom fields, etc...
The semi-regulated output can be
followed by 3-terminal regulators
to provide output protection, in
addition to output regulation.
model
number
VBT2-S5-S5-SMT
VBT2-S5-S9-SMT
VBT2-S5-S12-SMT
VBT2-S5-S15-SMT
VBT2-S12-S5-SMT
VBT2-S12-S9-SMT
VBT2-S12-S12-SMT
VBT2-S12-S15-SMT
1 of 3
DESCRIPTION: dc-dc converter
PART NUMBER: VBT2-SMT series
description
page
W output
·temperature range: -40°C~+85°C
·unregulated
·high efficiency to 85%
·single voltage output
·small footprint
·SMD package style
·industry standard pinout
·UL94-V0 package
·no heatsink required
·1K Vdc isolation
·high power density
·no external component required
·low cost
input voltage
nominal
5 Vdc
5 Vdc
5 Vdc
5 Vdc
12 Vdc
12 Vdc
12 Vdc
12 Vdc
range
4.5~5.5 Vdc
4.5~5.5 Vdc
4.5~5.5 Vdc
4.5~5.5 Vdc
10.8~13.2 Vdc
10.8~13.2 Vdc
10.8~13.2 Vdc
10.8~13.2 Vdc
output
voltage
5 Vdc
9 Vdc
12 Vdc
15 Vdc
5 Vdc
9 Vdc
12 Vdc
15 Vdc
output current
max.
min.
400 mA
40 mA
222 mA
23 mA
167 mA
17 mA
133 mA
14 mA
400 mA
40 mA
222 mA
23 mA
167 mA
17 mA
133 mA
14 mA
OUTPUT SPECIFICATIONS
item
output power
line regulation
load regulation
output voltage accuracy
temperature drift
output ripple
switching frequency
test conditions
for Vin change of 1%
10% to 100% full load (5 output)
10% to 100% full load (9 output)
10% to 100% full load (12 output)
10% to 100% full load (15 output)
see tolerance envelope graph
@ 100% load
20 MHz bandwidth
full load, nominal input
min.
0.2
typ.
12.8
8.3
6.8
6.3
75
70
max.
2
±1.2
15
15
15
15
units
W
%
%
%
%
%
0.03
150
%/°C
mVp-p
KHz
NOTE:
1. All specifications measured at TA=25°C, humidity <75%, nominal input voltage and rated output load unless
otherwise specified.
20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382
efficiency
80%
82%
84%
84%
82%
83%
85%
85%
rev.
page
2 of 3
date
02/2008
DESCRIPTION: dc-dc converter
PART NUMBER: VBT2-SMT series
GENERAL SPECIFICATIONS
short circuit protection
temperature rise at full load
<1 second
25°C max, 15°C typ.
cooling
free air convection
operating temperature range
-40°C to +85°C
storage temperature range
-55°C to +125°C
soldering temperature
260°C (1.5mm from case for 10 sec.)
storage humidity range
<95%
case material
plastic (UL94-V0)
MTBF
>3,500,000 hrs.
ISOLATION SPECIFICATIONS
item
isolation voltage
insulation resistance
DIMENSIONS (mm)
test conditions
tested for 1 min.
test at 500 Vdc
min.
1000
1000
typ.
max.
units
Vdc
M Ω
TYPICAL CHARACTERISTICS
20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382
rev.
PART NUMBER: VBT2-SMT series
APPLICATION NOTES:
page
3 of 3
date
02/2008
DESCRIPTION: dc-dc converter
- Minimum loading
The converter needs a minimum of 10% loading to maintain
- Input filtering
output regulation. Operation under no-load conditions will not
To reduce the reflected ripple current and minimize EMI,
cause immediate damages but may reduce reliability, and
especially when the converter input is more than 2” away from
cause performance not to meet specifications.
the DC source, it is recommended to connect a low ESR
electrolytic capacitor between Vin and Gnd. The values
- Regulation
suggested are as shown in Table 1. If additional filtering is
With a semi-regulated design, the converter’s output voltage
required, the capacitance may be increased, or expanded to
varies with load current and will change proportionally to the
an LC network as shown in Figure 1.
input voltage. If regulated output is needed, an external
regulator can be used as shown in Figure 2.
TABLE 1
- Protection
The converter has minimal protection against input overvoltage or output over-load, and may be permanently damaged
if exposed to these conditions. An input clamping device can
be used for input voltage limiting. An input fuse or an output
fuse also be used to protect against over-loading.
- Dual outputs used as a single output
The +Vout and -Vout can be used to obtain a single output
that is the sum of the two outputs. In this case, the COM pin
- Output filtering
shouldn’t be used.
Output capacitance may be increased for additional filtering,
but should not exeed 10μF or expanded to an LC network as
in Figure 1.
- External Regulator
An external 3-terminal regulator can be connected to the
output of the converter to achieve full regulation. Make sure
the converter’s output voltage provides sufficient head room
FIGURE 1
for the regulator. An additional benefit is that the built-in
protection features in the regulator, such as OCP, OTP, etc,
will protect the converter also. In a complimentory supply, a
negative output regulator must be used to achieve the
negative regulated output.
RECOMMENDED REFLOW SOLDERING PROFILE
FIGURE 2
20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382