B-XM-2W

B-XM-2WSeries
Isolated 2W Single Output DC/DC Converters
SELECTION GUIDE
FEATURES
Footprint from 1.05cm2
◆
I/O isolation voltage 1000VDC
Input
Voltage
(V)
Output
Voltage
(V)
Output
Current
(MA)
Input Current
(Rated Load)
(MA)
Efficiency
Order code
B0505XM-2W
5
5
400
513
B0509XM-2W
5
9
222
B0512XM-2W
5
12
B0515XM-2W
5
B1205XM-2W
(%)
(KHRS)
78
19
2327
492
81
27
1393
167
479
84
32
832
15
133
481
83
27
481
12
5
400
207
81
28
716
B1209XM-2W
12
9
222
198
84
42
593
B1212XM-2W
12
12
167
197
85
46
461
B1215XM-2W
12
15
133
197
85
54
328
B2405XM-2W
24
5
400
104
80
60
315
B2409XM-2W
24
9
222
100
83
65
302
B2412XM-2W
24
12
167
99
84
78
295
B2415XM-2W
24
15
133
99
84
58
282
◆
Operating Temperature: -40℃～﹢85℃
◆
High efficiency up to 85%
◆
Fully encapsulated toroidal magnetics
◆
Internal SMD construction
◆
Input Characteristics
Parameter
Custom solutions available
◆
No electrolytic or tantalum capacitors
◆
Voltage range
5V,9V,12V and 15V output
◆
No heatsink required
◆
MTTF1
Isolation
Capacitance
(PF)
Conditions
Min
Typ
Max.
Continuous operation,5V input types
4.5
5
5.5
Continuous operation,12V input types
10.8
12
13.2
Continuous operation,24V input types
21.6
24
26.4
Units
V
5V input types
33
mA p-p
12V input types
38
mA p-p
Reflected ripple current
Pin compatible with B-X(S)D-1W series
◆
OUTPUT CHARACTERISTICS
Parameter
Conditions
UL 94V-0 package material
◆
No external compo nents required
◆
Industry standard pinout
◆
Rated Power
TA=-40°C to 85°C
Voltage Set Point Accuracy
See tolerance envelope
Line regulation
①Product Series
③Output Voltage
⑤Package Style
Ripple and Noise
APPLICATIONS
The B-XM-2W series of DC/DC Converters
is particularly suited to isolating and/or
converting DC power rails. The galvanic
isolation allows the device to be configured to
provide an isolated negative rail in systems
where only positive rails exist.The wide
temperature range guarantees startup from
–40°C and full 2 watt output at 85°C. Pin
compatibility with the B-X(S)D-1W ensures
ease of upgradeability.
W
1.2
%%
7
8.5
%
9V output
4.5
5.2
%
12V output
4.5
5.5
%
15V output
3.7
8.5
%
B0505XM,BW=DC to 20MHz
96
200
mA p-p
B0509XM,BW=DC to 20MHz
67
200
mA p-p
B0512XM,BW=DC to 20MHz
59
200
mA p-p
B0515XM,BW=DC to 20MHz
53
200
mA p-p
B1205XM,BW=DC to 20MHz
76
200
mA p-p
B1209XM,BW=DC to 20MHz
63
200
mA p-p
B1212XM,BW=DC to 20MHz
53
200
mA p-p
B1215XM,BW=DC to 20MHz
45
200
mA p-p
Max.
Unit
10% load to rated load
②Input Voltage
④Fixed Input
⑥Rated Power
Units
2
1.0
◆
①
②
③ ④
⑤
⑥
B 05 05 X M -2W
Max.
5V output
Load regulation
MODEL SELECTION
Typ.
High VIN to low VIN
Power density 2.01W/cm3
◆
MTTF up to 2.3 million hours
Min
Absolute Maximum Ratings
Short-circuit protection2
1 second
Lead temperature 1.5mm from case for 10 seconds
300℃
Internal power dissipation
805mW
Input voltage VIN,B05 types
7V
Input voltage VIN,B12 types
15V
Input voltage VIN,B24 types
28V
Isolation characteristics
Parameter
Conditions
Min.
Typ
Isolation test voltage
1 second
1000
VDC
Resistance
Viso= 500VDC
10
GΩ
1.Calculated using MIL-HDBK-217FN2 calculation model with nominal input voltage at full load.
MICRODC RESERVES THE COPYRIGHT
2.Supply voltage must
be disconnected at the end of the short circuit duration.
All specifications typical at TA=25°C,nominal input voltage and rated output current unless otherwise specified.
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Page 1 of 4
B-XM-2WSeries
Minimum load
The minimum load to meet datasheet specification is 10% of the full rated load across the specified input voltage range. Lower than 10% minimum loading
will result in an increase in output voltage, which may rise to typically double the specified output voltage if the output load falls to less than 5%.
Capacitive loading and start up
Typical start up times for this series, with a typical input voltage rise time of 2.2s and output capacitance of 10F, are shown in the table below. The product
series will start into a capacitance of 47F with an increased start time, however, the maximum recommended output capacitance is 10F.
Start-up time
B0505XM
790
B0509XM
1154
B0512XM
2265
B0515XM
2998
B1205XM
396
B1209XM
880
B1212XM
1156
B1215XM
2394
General Characteristics
Parameter
Conditions
Switching frequency
Min.
Typ.
Max.
Units
5V input types
90
kHz
12V input types
90
kHz
Temperature Characteristics
Parameter
Conditions
Min.
Specification
All output types
-40
85
-50
130
Storage
Case temperature above
ambient
Cooling
Typ.
Max.
5V output types
45
All other output types
36
Units
℃
Free air convection
Temperature derating graph
Tolerance envelope
The voltage tolerance envelope shows typical load regulation characteristics for this
product series. The tolerance envelope is the maximum output voltage variation due
to changes in output loading.
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Technical Enquiries-Email:[email protected] Tel:0086-20-86000646
Page 2 of 4
B-XM-2WSeries
Technical notes
ISOLATION VOLTAGE
"Hi Pot Test","Flash Tested","Withstand Voltage","Dielectric Withstand Voltage"&”Isolation Test Voltage" are all terms that relate to the same thing, a test voltage.
Applied for a specified time, across a component designed to provide electrical isolation, to verify the integrity of that isolation.
Professional Power Module B-XM series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 1KVDC for 1 second.
A question commonly asked is,"What is the continuous voltage that can be applied across the part in normal operation?"
The B-XM-2W series has been recognized by Underwriters Laboratory for functional insulation. Both input and output should normally be maintained within SELV limits i.e. less than
42.4V peak, or 60VDC.The isolation test voltage represents a measure of immunity to transient voltages and the part should never be used as an element of a safety isolation system.
The part could be expected to function correctly with several hundred volts offset applied continuously across the isolation barrier, but then the circuitry on both sides of the barrier must
be regarded as operating at an unsafe voltage and further isolation/insulation systems must form a barrier between these circuits and any user-acssible circuitry according to
safety standard requirements.
REPEATED HIGH-VOLTAGE ISOLATION TESTING
It is well known that repeated high-voltage isolation testing of a barrier component can actually degrade isolation capability, to a lesser or greater degree depending on materials.
Construction and environment. The B-XM series has toroidal isolation transformers, with no additional insulation between primary and secondary windings of enameled wire. While
parts can be expected to withstand several times the stated test voltage, the isolation capability does depend on the wire insulation. Any material, including this enamel (typically
polyurethane) is susceptible to eventual chemical degradation when subject to very high applied voltages thus implying that the number of tests should be strictly limited. We
therefore strongly advise against repeated high voltage isolation testing. but if it is absolutely required, that the voltage be reduced by 20% from specified test voltage.
This consideration equally applies to agency recognized parts for better than functional isolation where the wire enamel insulation is always supplemented by a further
insulation system of physical spacing or barriers.
OUTPUT RIPPLE REDUCTION
Output ripple reduction
By using the values of inductance and capacitance stated, the output ripple at the rated load is lowered to 5mV p-p max.
Component selection
Capacitor: Ceramic chip capacitors are recommended. It is required that the ESR(Equivalent Series Resistance)should be as low as possible.X7R types are recommended.
The voltage rating should be at least twice(except for 15V output),the rated output voltage of the DC/DC converter.
Inductor: The rated current of the inductor should not be less than of the output of the DC/DC converter. At the rated current, the DC resistance of the inductor should be such that the voltage drop across the
inductor is <2% of the rated voltage of the DC/DC converter. The SRF(Self Resonant Frequency) should be >20MHz.
CHARACTERISATION TEST METHODS
Ripple & Noise Characterization Method
Ripple and noise measurements are performed with the following test configuration.
C1
1μF X7R multilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC/DC converter
C2
10μF tantalum capacitor, voltage rating to be a minimum of 1.5 times the output voltage of the DC/DC converter with an ESR of less than 100mΩ at 100 KHz
C3
100nF multilayer ceramic capacitor, general purpose
R1
450Ω resistor, carbon fi lm, ±1% tolerance
R2
50Ω BNC termination
T1
3T of the coax cable through a ferrite toroid
RLOAD
Resistive load to the maximum power rating of the DC/DC converter. Connections should be made via twisted wires
Measured values are multiplied by 10 to obtain the specified values.
Differential Mode Noise Test Schematic
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Technical Enquiries-Email:[email protected] Tel:0086-20-86000646
Page 3 of 4
B-XM-2WSeries
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
FOOTPRINT DETAILS
SIP Package
PIN CONNECTIONS-4 PIN SIP
PIN
Function
"N"SUFFIX
1
-Vin
+Vin
-Vout
+Vout
+Vin
-Vin
-Vout
+Vout
2
3
4
Specifcations can be changed any time without notice.
No parallel connection or plug and play.
Note:
1. The load shouldn't be less than 10%, otherwise ripple will increase dramatically.
2. Operation under 10% load will not damage the converter; However, they may not meet all
specification listed.
3. All specifications measured at Ta=25°C, humidity<75%, nominal input voltage and rated output load
unless otherwise specified.
4. In this datasheet, all the test methods of indications are based on corporate standards.
All dimensions in inches ±0.01(mm±
0.01(mm±0.25mm).
All pins on a 0.1(2.54) pitch and within ±0.01(0.25)of true position.
Weight: 2.0g
RECOMMENDED FOOTPRINT DETAILS
TUBE OUTLINE DIMENSIONS
4 Pin SIP Package
4 PIN SIP Tube
Unless otherwise stated all dimensions in inches (mm) ±0.5mm.
Unless otherwise stated all dimensions in inches (mm) ±0.5mm.
Tube length (4 Pin SIP) : 20.47 (520mm ±2mm).
Tube Quantity :35
RoHS COMPLIANT INFORMATION
Microdc Professional Power Module,Inc.
This series is compatible with RoHS soldering systems with a peak wave solder temperature of 300°C
Tel:0086-20-86000646 E-mail:[email protected]
for 10 seconds. The pin termination finish on the SIP package type is Tin Plate, Hot Dipped over Matte
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Tin with Nickel Preplate. The DIP types are Matte Tin over Nickel Preplate. Both types in this series are
Microdc Professional Power module,Inc.makes no representation that
backward compatible with Sn/Pb soldering systems.
the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or
REACH COMPLIANT INFORMATION
future patent rights. Specifications are subject to change without notice.
This series has proven that this product does not contain harmful chemicals, it also has harmful chemical
©2010
substances through the registration, inspection and approval.
Microdc Professional Power Module, Inc. Guangzhou
http://www.microdc.cn
Technical Enquiries-Email:[email protected] Tel:0086-20-86000646
Page 4 of 4