B0303XT-1W Datasheet, PDF (2/2 Pages) RSG Electronic Components GmbH – 1W,FIXED INPUT, ISOLATED & UNREGULATED single OUTPUT, SMD DC-DC CONVERTER

RSG■
ELECTRONIC COMPONENTS
RSG Electronic Components GmbH ^■ Sprendlinger Landstr. 115 ^■ D-63069 Offenbach/Germany
Tel. [phone] ^■ Fax [phone] ^■ [e-mail] ^■ www.rsg-electronic.de
Änderungen vorbehalten / subject to change without notice
COMMON SPECIFICATION
Item
Test Conditions
Min
Storage humidity
Operating temperature
-40
Storage temperature
-55
Temp. rise at full load
Lead temperature
1.5mm from case for 10 seconds
Cooling
Isolation voltage
Tested for 1 minute and 1mA max 1000
Isolation resistance Test at 500VDC
1000
Short circuit protection
Case material
MTBF
3500
Weigh
Typ Max
Units
95
%
85
125
°C
15
25
260
Free air convection
VDC
MΩ
1 second(Max)
Plastic(UL94-V0)
K Hours
1.41
g
TYPICAL CHARACTERISTICS
Operating Temp.(^oC)
RECOMMENDED REFLOW SOLDERING PROFILE
2 50
26 0^oC
10 Sec Max
2 00
22 0^oC
1 50
90 Sec Max
1 00
( >220^oC )
APPLICATION NOTE
Requirement on output load
To ensure this module can operate efficiently and
reliably, During operation, 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.
Recommended testing circuit
If you want to further decrease the input/output
ripple, an “LC” filtering network may be connected
to the input and output ends of the DC/DC
converter, see (Figure 1).
Single Output
L
Vin
L
+Vo
Cin
GND
DC DC
Cout
0V
(Figure 1)
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. 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 (Table 1).
EXTERNAL CAPACITOR TABLE (Table 1)
Vin
Cin Vout Cout
(VDC) (uF) (VDC) (uF)
3.3
4.7
3.3
10
5
4.7
/5
10
12
2.2
9
4.7
24 0.47 12
2.2
-
-
15
1
-
-
24 0.47
It’s not recommend to connect any external capacitor
in the application field with less than 0.5 watt output.
50
0
Time (sec .)
OUTLINE DIMENSIONS & FOOTPRINT DETAILS
(Side view)
2.54 0.25
(0.100) (0.100)
12.70 (0.500)
7.62
(0.300)
(Top view)
First Angle Projection
RECOMMENDED FOOTPRINT
Top view,grid:2.54mm(0.1inch)
6.76
(0.266)
1.85MAX
(0.073)
7.19
(0.283)
B_T-1W
A
0.3
(0.012)
B_(X)T-1W
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
G ND
REG
DC DC
+Vout
0V
Vin
G ND
REG
DC DC
（Figure2）
+Vo ut
0V
2.54±0.1
(0.100±0.004)
0.60±0.05
(0.024±0.002)
1.35MAX
(0.053)
0.50 (0.020)
5.00 ^。
Note:
Unit:mm(inch)
Pin section:0.60*0.25mm(0.024*0.010inch)
P in tolerances:+0.10mm(+0.004inch)
G eneral tolerances:+0.15mm (+0.006inch)
8765
1234
8
5
12 4
FOOTPRINT DETAILS
Pin Single
1
GND
2
Vin
4
0V
5
+V0
3,6,7
NC
8
NC
NC:No Connection
Duals
GND
Vin
0V
+Vo
NO Pin
NC
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.
No parallel connection or plug and play.
Specifications subject to change without notice.
B_(X)T-1W
A/0-2007
Page 2 of 2