B_(X)T-1W
Series
1W,FIXED INPUT,
ISOLATED & UNREGULATED
SINGLE OUTPUT, SMD DC-DC CONVERTER
FEATURES
SMD Package Style
Industry Standard Pinout
No Heat sink Required
1KVDC Isolation
High Power Density
Internal SMD construction
Temperature Range: -40°C to +85°C
No External Component Required
RoHS
Compliance
multi-country patent protection
RoHS
PRODUCT PROGRAM
Input
Part
Number
B0303(X)T-1W
B0305(X)T-1W
B0503(X)T-1W
B0505(X)T-1W
B0509(X)T-1W
B0512(X)T-1W
B0515(X)T-1W
B1205(X)T-1W
B1209(X)T-1W
5
4.5-5.5
Voltage (VDC)
Nominal
3.3
Range
3.0-3.6
Voltage
(VDC)
3.3
5
3.3
5
9
12
15
5
12
10.8-13.2
9
12
15
3.3
5
24
21.6-26.4
9
12
15
24
Output
Current (mA)
Max
303
200
303
200
111
84
67
200
111
84
67
300
200
110
83
67
42
Min
30
20
30
20
12
9
7
20
12
9
7
30
20
11
8
7
4
73
74
72
77
76
79
78
69
73
73
74
69
70
72
75
76
77
UL
UL
Efficiency
(%, Typ.)
UL CE
UL，CE
UL，CE
UL，CE
UL，CE
UL，CE
UL，CE
UL，CE
UL，CE
APPLICATIONS
The B_(X)T-1W Series are specially designed
for applications where a group of polar power
supplies are 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.
B1212(X)T-1W
B1215(X)T-1W
B2403(X)T-1W
B2405(X)T-1W
B2409(X)T-1W
B2412(X)T-1W
B2415(X)T-1W
B2424(X)T-1W
Note: 1.the B_XT-1W series have no 3,6,7 pin. For example B0505XT-1W.
2. B_XT-1W series : UL-60950-1 pending.
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
OUTPUT SPECIFICATIONS
Item
Output power
Line regulation
For Vin change of 1%(3.3V output)
For Vin change of 1%(Others output)
10% to 100% load (3.3V output)
10% to 100% load (5V output)
Load regulation
10% to 100% load (9V output)
10% to 100% load (12V output)
10% to 100% load (15V output)
10% to 100% load (24V output)
Output voltage accuracy
Temperature drift
100% full load
20MHz Bandwidth
Full load, nominal input(5/12V)
Full load, nominal input(24V)
50
100
500
Output ripple &Noise*
Switching frequency
See tolerance envelope graph
0.03
100
%/°C
mVp-p
KHz
15
12.8
8.3
6.8
6.3
5
Test Conditions
Min
0.1
Typ.
Max
1
±1.5
±1.2
20
15
10
10
10
10
%
Units
W
MODEL SELECTION
B0505(X)T-1W
Ra ted Power
Pac ka ge Style
Ou t put Voltage
Inp ut Voltage
Pro duct Series
MORNSUN Science& Technology co.,Ltd.
Address: 2th floor 6th building, Huangzhou Industrial
District, Guangzhou, China
Tel: 86-20-38601850
Fax:86-20-38601272
Http://www.mornsun-power.com
*Test ripple and noise by
“parallel
cable” method. See detailed operation instructions at Testing of Power
Converter section, application notes.
Note:
1. All specifications measured at T
A
=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
Specifications subject to change without notice.
B_(X)T-1W
A/2-2008
Page 1 of 2
COMMON SPECIFICATION
Item
Storage humidity
Operating temperature
Storage temperature
Temp. rise at full load
Lead temperature
Cooling
Package material
Short circuit protection*
MTBF
Weight
*Supply voltage must be discontinued at the end of short circuit duration.
APPLICATION NOTE
Min
-40
-55
15
Typ
Max
95
85
125
25
260
Free air convection
Epoxy Resin(UL94V-0)
1
3500
1.41
s
K Hours
g
°C
Units
%
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
L
Test Conditions
1.5mm from case for 10 seconds
TYPICAL CHARACTERISTICS
Vin
Cin
+Vo
DC DC
Cout
GND
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
Operating Temp.( C)
o
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
(VDC)
3.3/5
12
24
-
Cin
(uF)
4.7
2.2
0.47
-
-
Vout
(VDC)
3.3/5
9
12
15
24
Cout
(uF)
10
4.7
2.2
1
0.47
RECOMMENDED REFLOW SOLDERING PROFILE
2 50
Te m p e ra tu r e (
o
C)
2 00
1 50
1 00
50
0
Time ( s ec .)
90 Se c Ma x
( >22 0
o
C )
26 0 C
10 Sec Max
o
22 0
o
C
-
It’s not recommend to connect any external capacitor in the
application field with less than 0.5 watt output.
OUTLINE DIMENSIONS & FOOTPRINT DETAILS
4.13
(0.163)
First Angle Projection
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).
6.25
(0.246)
6.00
(0.236)
(Side view)
2.54
0.25
(0.100) (0.100)
RECOMMENDED FOOTPRINT
Top
view,grid:2.54*2.54mm(0.1*0.1inch)
B_T-1W
8 7 6 5
B_(X)T-1W
8
1 2
5
4
12.70 (0.500)
7.62
(0.300)
11.2 MAX
(0.441)
7.50
(0.295)
Vin
GND
REG
+Vout
2.00
(0.079)
1 2 3 4
DC DC
0V
REG
(Top view)
(0.039)
Vin
GND
+Vout
DC DC
0V
2.54
±
0.1
(0.100
±
0.004)
6.76
(0.266)
0.60
±
0.05
(0.024
±
0.002)
FOOTPRINT DETAILS
Pin Function(T) Function(XT)
GND
1
GND
Vin
Vin
2
0V
4
0V
5
+Vo
+Vo
No Pin
3,6,7
NC
NC
NC
8
NC:No Connection
Note:
Unit:mm(inch)
Pin section:0.60*0.25mm(0.024*0.010inch)
Pin tolerances:
+
0.10mm(
+
0.004inch)
General tolerances:
+
0.15mm(
+
0.006inch)
（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
A
1.85MAX
(0.073)
7.19
(0.283)
0.30
(0.012)
0.50 (0.020)
at the input end or add a circuit breaker to the
circuit.
No parallel connection or plug and play.
B_(X)T-1W
A/2-2008
Page 2 of 2
1.35MAX
(0.053)
5.00
。
MORNSUN reserves the copyright
Specifications subject to change without notice.
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