DC/DC Converter
B_XT-1WR2 Series
1W, Fixed input voltage, isolated & unregulated
single output
FEATURES
Continuous short-circuit protection
Operating temperature range: -40℃ to +105℃
Miniature SMD package
Isolation voltage: 1.5K VDC
Internal surface mounted design
No external component required
International standard pin-out
Patent Protection
RoHS
B_XT-1WR2 series are specially designed for applications where an isolated voltage is required in a distributed power supply system. They are
suitable for
1. Where the voltage of the input power supply is stable (voltage variation: ±10%Vin);
2. Where isolation between input and output is necessary (isolation voltage
≤1500VDC);
3. Where the output voltage regulation and the ripple & noise of the output voltage is not strictly required;
4. Typical application: digit circuit condition; normal low-frequency artificial circuit condition; relay drive circuit condition, etc.
Selection Guide
Input Voltage (VDC)
Certification
--
UL
--
Part No.
B0303XT-1WR2
B0305XT-1WR2
B0312XT-1WR2
B0315XT-1WR2
B0324XT-1WR2
B0503XT-1WR2
B0505XT-1WR2
B0506XT-1WR2
UL
B0509XT-1WR2
B0512XT-1WR2
B0515XT-1WR2
B0524XT-1WR2
B1203XT-1WR2
B1205XT-1WR2
UL
B1209XT-1WR2
B1212XT-1WR2
B1215XT-1WR2
B1224XT-1WR2
--
B1505XT-1WR2
B1515XT-1WR2
UL
--
UL
B2405XT-1WR2
B2409XT-1WR2
B2412XT-1WR2
B2415XT-1WR2
B2424XT-1WR2
24
(21.6-26.4)
15
(13.5-16.5)
12
(10.8-13.2)
5
(4.5-5.5)
3.3
(2.97-3.63)
Nominal
(Range)
(VDC)
3.3
5
12
15
24
3.3
5
6
9
12
15
24
3.3
5
9
12
15
24
5
15
5
9
12
15
24
Output
Output Voltage
Output Current
(mA)(Max./Min.)
303/30
200/20
84/9
67/7
42/4
303/30
200/20
167/17
111/12
84/9
67/7
42/4
303/30
200/20
111/12
84/9
67/7
42/4
200/20
67/7
200/20
111/12
84/9
67/7
42/4
Efficiency
(%,Min./Typ.)
@ Full Load
65/69
70/74
76/80
76/80
76/80
68/72
76/80
76/80
76/80
76/80
76/80
76/80
68/72
76/80
76/80
76/80
76/80
76/80
76/80
76/80
76/80
76/80
76/80
76/80
76/80
220
Max. Capacitive
Load
(μF)
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DC/DC Converter
B_XT-1WR2 Series
Input Specifications
Item
Operating Conditions
3.3V input
Input Current
(full load / no-load)
5V input
12V input
15V input
24V input
Reflected Ripple Current
3.3V input
5V input
Surge Voltage (1sec. max.)
12V input
15V input
24V input
Input Filter
Hot Plug
Min.
--
--
--
--
--
--
-0.7
-0.7
-0.7
-0.7
-0.7
Typ.
404/25
250/20
104/15
82/10
52/7
15
--
--
--
--
--
Max.
--/70
--/60
--/50
--/35
--/30
--
5
9
18
21
30
Unavailable
VDC
mA
mA
Unit
Filter capacitor
Output Specifications
Item
Output Voltage Accuracy
Line Regulation
Input voltage
change: ±1%
3.3VDC output
Other outputs
3.3VDC output
5VDC output
6VDC output
Load Regulation
10%-100% load
9VDC output
12VDC output
15VDC output
24VDC output
Ripple & Noise*
Temperature Coefficient
Short Circuit Protection**
20MHz bandwidth
Full load
B24xxXT-1WR2/ B0524XT-1WR2
Others
Operating Conditions
Min.
--
--
--
--
--
--
--
--
--
--
--
--
Typ.
--
--
18
12
10
8
7
6
5
60
--
--
Max.
±1.5
±1.2
--
--
--
--
--
--
--
150
±0.03
1
mVp-p
%/℃
s
%
Unit
See tolerance envelope graph (Fig. 1)
--
Continuous, self-recovery
Note: * Ripple and noise are measured by “parallel cable” method, please see DC-DC Converter Application Notes for specific operation;
** Supply voltage must be discontinued at the end of short circuit duration for B24xxXT-1WR2 series, and B0524XT-1WR2 model.
General Specifications
Item
Isolation Voltage
Isolation Resistance
Isolation Capacitance
Operating Temperature
Storage Temperature
Casing Temperature Rise
Pin Welding Resistance
Temperature
Storage Humidity
Reflow Soldering Temperature
Switching Frequency
MTBF
Full load, nominal input voltage
MIL-HDFK-217F@25℃
Ta=25℃, nominal input, full load output
Welding spot is 1.5mm away from the casing, 10
seconds
Non-condensing
Operating Conditions
Input-output, with the test time of 1 minute and the
leak current lower than 1mA
Input-output, isolation voltage 500VDC
Input-output, 100KHz/0.1V
Derating if the temperature
≥100℃
(see Fig. 2)
Min.
1500
1000
--
-40
-55
--
--
--
Typ.
--
--
20
--
--
25
--
--
Max.
--
--
--
105
125
--
300
95
%RH
℃
Unit
VDC
MΩ
pF
Peak temp.≤245℃, maximum duration time≤60s
at 217℃. For actual application, please refer to
IPC/JEDEC J-STD-020D.1.
--
3500
100
--
--
--
KHz
K hours
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DC/DC Converter
B_XT-1WR2 Series
Physical Specifications
Casing Material
Dimensions
Weight
Cooling Method
Epoxy resin (UL94-V0)
12.70*11.20*7.25 mm
1.6g(Typ.)
Free convection
EMC Specifications
EMI
EMS
CE
RE
ESD
CISPR22/EN55022
CISPR22/EN55022
IEC/EN61000-4-2
CLASS B (see Fig. 4 for recommended circuit)
CLASS B (see Fig. 4 for recommended circuit)
Contact
±8KV perf. Criteria B
Product Characteristic Curve
Output Voltage
Accuracy
(%)
+10%
+5%
0
-5%
-10%
-15%
10% 20%
40%
60%
80%
3.3VDC output
Tolerance Envelope Cur ve
Max .
+1.0%
Output Voltage
Accuracy
(%)
Other output
+15%
+10%
+5%
0
-5%
-10%
10% 20%
40%
60%
80%
Tolerance Envelope Curve
Ma x .
Typ
.
M i n.
+2.5%
-2.5%
-7.5%
Ty p
.
-7.5%
M i n.
-15%
100%
100%
Output Cur rent Percentage(%)
(Nominal Input Voltage)
Output Current Percent(%)
(Nominal Input Voltage)
Fig. 1
Temperature Derating Cur ve
Output P ower Percent(%)
120
100
80
60
40
20
0
-40
40
71 100 105
0
Ambient Temp.(
℃
)
Fig. 2
100
90
80
B0505XT-1WR2
Safe Ope rating Area
Efficiency Vs Input Voltage (Full Load)
100
95
90
Efficiency Vs Output Load(Vin=5V)
B0505XT-1WR2
Efficiency(%)
80
75
70
65
60
55
50
4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5
Efficiency(%)
85
70
60
50
40
30
20
10
0
10
20
30
40
50
60
70
80
90
100
Input Voltage(V)
Output Current Percentage(%)
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DC/DC Converter
B_XT-1WR2 Series
Efficiency Vs Input Voltage (Full Load)
100
95
90
Efficiency Vs Output Load(Vin=24V)
100
90
80
70
60
50
40
30
20
10
0
10
20
30
40
50
60
70
80
90
100
B2415XT-1WR2
Efficiency(%)
80
75
70
65
60
55
50
21.6 22.1 22.6 23.1 23.5 24.0 24.5 25.0 25.4 25.9 26.4
Input Voltage(V)
Efficiency(%)
85
B2415XT-1WR2
Output Current Percentage(%)
Design Reference
1. Typical application circuit
If it is required to further reduce input and output ripple, a filter capacitor may be connected to the input and output terminals, see Fig.3.
Moreover, choosing a suitable filter capacitor is very important, start-up problems may be caused if the capacitance is too large. Under
the condition of safe and reliable operation, the recommended capacitive load values are shown in Table 1.
Recommended capacitive load value table (Table 1)
Vin(VDC)
Cin(μF)
Vo (VDC)
Cout(μF)
Vin
C in
GND
+Vo
DC
DC
Cout
0V
Fig.3
3.3
5
12
15
24
--
4.7
4.7
2.2
2.2
1
--
3.3
5/6
9
12
15
24
10
10
4.7
2.2
1
0.47
2. EMC solution-recommended circuit
LDM
Vin
C1
GND
Vin
+Vo
C2
LOAD
DC/DC
GND
0V
Input voltage (VDC)
C1
EMI
C2
LDM
3.3/5/12/15/24
4.7μF /50V
Refer to the Cout in Fig.3
6.8μH
Fig. 4
3. Output load requirements
When using, the minimum load of the module output should not be less than 10% of the nominal load. In order to meet the performance
parameters of this datasheet, please connect a 10% dummy load in parallel at the output end, the dummy load is generally a resistor,
Please note that the resistor needs to be used in derating.
4. For more information please find DC-DC converter application notes on
www.mornsun-power.com
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DC/DC Converter
B_XT-1WR2 Series
Dimensions and Recommended Layout
THIRDANGLEPROJECTION
12.70±0.50[0.500±0.020]
7.62[0.300]
7.62[0.300]
11.20[0.441]
8.30[0.327]
A
0~ 5
°
1
2
4
0.25[0.010]
TopView
2.10[0.083]
TopView
1
2
4
0.60[0.024]
2.54[0.100]
1.00[0.039]
2.54[0.100]
7.25[0.285]
7.00[0.276]
Note:Grid2.54*2.54mm
FrontView
RightView
A
0.88[0.035]
0.10
Note:
Unit:mm[inch]
Pinsectiontolerances:±0.10[±0.004]
Generaltolerances:±0.25[±0.010]
Pin-Out
Function
Pin
GND
1
2
Vin
4
0V
5
+Vo
8
NC
NC:NoConnection
2BXT1WR201-A0
Notes:
1.
2.
3.
4.
5.
6.
7.
8.
Packing information please refer to Product Packing Information which can be downloaded from
www.mornsun-power.com.
Packing
bag number: 58210024;
If the product is not operated within the required load range, the product performance cannot be guaranteed to comply with all
parameters in the datasheet;
The maximum capacitive load offered were tested at nominal input voltage and full load;
Unless otherwise specified, parameters in this datasheet were measured under the conditions of Ta=25℃, humidity<75% with nominal
input voltage and rated output load;
All index testing methods in this datasheet are based on our Company’s corporate standards;
The performance parameters of the product models listed in this manual are as above, but some parameters of non-standard model
products may exceed the requirements mentioned above. Please contact our technicians directly for specific information;
We can provide product customization service;
Specifications are subject to change without prior notice.
MORNSUN Guangzhou Science & Technology Co., Ltd.
Address: No. 5, Kehui St. 1, Kehui Development Center, Science Ave., Guangzhou Science City, Luogang District, Guangzhou, P. R. China
Tel: 86-20-38601850-8801
Fax: 86-20-38601272
E-mail: info@mornsun.cn
2015.04.03-A/3
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