ELECTRONIC COMPONENTS
RSG
■
RSG Electronic Components GmbH Sprendlinger Landstr. 115 D-63069 Offenbach/Germany
Tel. +49 69 984047-0 Fax +49 69 984047-77 info@rsg-electronic.de
www.rsg-electronic.de
■
■
■
■
■
Änderungen vorbehalten / subject to change without notice
B_LT-2W Series
FIXED INPUT ISOLATED & UNREGULATED
2W SINGLE OUTPUT
ULTRAMINIATURE SMD PACKAGE
FEATURES
●
High Efficiency up to 85%
●
SMD Package Style
●
Single Output Voltage
●
High Power Density
●
Industry Standard Pin out
●
No Heatsink Required
●
1KVDC Isolation
●
Temperature Range: -40
°C
~+85
°C
●
No External Component Required
●
Custom Service Available
●
RoHS
Compliance
multi -country patent protection
RoHS
PRODUCT PROGRAM
Part
Number
B0505LT-2W
B0509LT-2W
B0512LT-2W
B0515LT-2W
B1205LT-2W
B1209LT-2W
B1212LT-2W
B1215LT-2W
12
10.8~13.2
5
4.5~5.5
Input
Voltage (VDC)
Nominal
Range
Output
Current (mA)
Voltage
(VDC)
Min
Max
5
9
12
15
5
9
12
15
400
222
167
133
400
222
167
133
40
23
17
14
40
23
17
14
Efficiency
(%, Typ)
Package
Style
SMD
SMD
SMD
SMD
SMD
SMD
SMD
SMD
81
82
84
84
82
83
85
85
APPLICATIONS
T
he B_LT-2W Series are specially
designed for applications where a single
power supply is isolated from the input
power supply in a distributed power
supply system on a circuit board.
These products apply to:
1) Where the voltage of the input power
supply is fixed (voltage variation
≤±10%);
2) Where isolation is necessary
between input and output (isolation
voltage =1000VDC);
3) Where the regulation of the output
voltage and the output ripple noise
are not demanding.
Such as: purely digital circuits, ordinary
low frequency analog circuits, and IGBT
power device driving circuits.
COMMON SPECIFICATIONS
Short circuit protection
Temperature rise at full load
Cooling
Operating temperature range
Storage temperature range
Lead temperature
Storage humidity range
Case material
MTBF
1 second
25°C MAX, 15°C TYP
Free air convection
-40°C~+85°C
-55°C ~+125°C
260°C
≤95%
Plastic (UL94-V0)
>3,500,000 hours
ISOLATION SPECIFICATIONS
Item
Isolation voltage
Isolation resistance
Test conditions
Tested for 1 minute and 1mA max
Test at 500VDC
Min
1000
1000
Typ
Max
Units
VDC
MΩ
MODEL SELECTION
B0505LT- 2W
Rated Power
Package Style
Output Voltage
Input Voltage
Product Series
OUTPUT SPECIFICATIONS
Item
Output power
Line regulation
Test conditions
For Vin change of 1%
10% to 100% load (3.3V,5V output)
10% to 100% load (9V output)
10% to 100% load (12V output)
10% to 100% load (15V output)
Output voltage accuracy
Temperature drift
Output ripple
Noise
Switching frequency
See tolerance envelope graph
100% full load
20MHz Bandwidth
20MHz Bandwidth
Full load, nominal input
75
150
70
0.03
150
250
%/°C
mVp-p
KHz
MIN
0.2
TYP
MAX
2
1.2
15
15
15
15
Units
W
%
12.8
8.3
6.8
6.3
Load regulation
%
Note:
1.All specifications measured at TA=25
°C
, humidity<75%, nominal input voltage and rated output load unless
otherwise specified.
2.See below recommended circuits for more details.
MORNSUN reserves the copyright
For any design change and upgrade, we will not make any prior notification
A/1-2007
Page 1 of 2
TYPICAL CHARACTERISTICS
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).
L
L
Ambient Temperature
(
C
)
RECOMMENDED REFLOW SOLDERING PROFILE
250
Peak .Temp 260℃
1 0 Sec Max
220℃
200
Te mper at ur e (
℃
)
90 Sec Max
( >220
℃
)
150
100
Vin
50
+Vo
C
DC DC
C
GND
0V
0
Tim e (s ec. )
（Figure
1）
PIN CONNECTIONS
Pin
1
Function
GND
2
Vin
3
NC
5
NC
6
0V
8
7
+ Vo N C
9
NC
10
NC
12 13 14
NC NC NC
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
(Figure2).
Vin
+Vout
REG
OUTLINE DIMENSIONS& RECONMENDED FOOTPRINT DETAILS
2.75
(0.11)
DC DC
GND
6.00
(0.24)
5.75
(0.2 3)
A
0.2 5
(0.01)
0 .6
±0
.0 5
0.0 2
±
0 .0 02
0V
REG
1.27
(0.05)
2.54
±0.1
(0.1
±
0.004)
0.25
(0.01)
Vin
GND
+Vout
DC DC
0V
14 1312
17.78
±0.
25
( 0.7
±
0 .01)
10 9 8
0.50
(0.02)
(Figure2)
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.
12.7
(0.5)
5.00 MAX
1 2 3
5 6 7
(0.6)
15.24
17.78
(0.7)
1.30
±
0.13
(0. 05
±
0.005)
Note: All Pins on a 2.54mm(0.1) pitch; All Pin Widths are 0.60 mm(0.02);
Tolerances:±0.15mm(0.006); Unit: mm(inch)
.
APPLICATION NOTE
Requirement on output load
To ensure this module can operate efficiently and reliably, a minimum load is
specified for this kind of DC/DC converter in addition to a maximum load
(namely full load). During operation, make sure the specified range of input
voltage is not exceeded, the minimum output load is
not less than 10%
of the
full load, and that this product should never be operated under no load! If the
actual output power is very small, please connect a resistor with proper
resistance at the output end in parallel to increase the load, or use our
company’s products with a lower rated output power (B_T-1W series).
EXTERNAL CAPACITOR TABLE
Vin
5VDC
12VDC
--
--
External
capacitor
4.7uF
2.2uF
--
--
V
out
5VDC
9VDC
12VDC
15VDC
External
capacitor
4.7uF
2.2uF
1uF
0.47uF
It’s not recommend to connect any
external capacitor in the application
field with less than 0.5 watt output。
A/1-2007
Page 2 of 2
MORNSUN reserves the copyright
For any design change and upgrade, we will not make any prior notification
京公网安备 11010802033920号
EEWORLD
