2B-XM Series Isolated 2W Single Output DC/DC Converters SELECTION GUIDE FEATURES ◆ ◆ ◆ ◆ 2 Footprint from 1.05cm I/O isolation voltage 1000VDC Operating Temperature: -40℃～﹢85℃ High efficiency up to 85% ◆ Fully encapsulated toroidal magnetics ◆ Internal SMD construction ◆ Custom solutions available ◆ No electrolytic or tantalum capacitors ◆ 5V,9V,12V and 15V output Input Voltage (V) Output Voltage (V) Output Current (MA) Input Current (Rated Load) (MA) Efficiency Order code 2B0505XM 5 5 400 513 2B0509XM 5 9 222 2B0512XM 5 12 2B0515XM 5 2B1205XM (%) (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 2B1209XM 12 9 222 198 84 42 593 2B1212XM 12 12 167 197 85 46 461 2B1215XM 12 15 133 197 85 54 328 2B2405XM 24 5 400 104 80 60 315 2B2409XM 24 9 222 100 83 65 302 2B2412XM 24 12 167 99 84 78 295 2B2415XM 24 15 133 99 84 58 282 Input Characteristics Parameter Voltage range ◆ No heatsink required ◆ Pin compatible with B-X(S)D-1W series ◆ UL 94V-0 package material ◆ No external compo nents required ◆ ◆ ◆ Power density 2.01W/cm3 ② ③ ④ ①Product Series ③Output Voltage ⑤Package Style 5 5.5 12 13.2 Continuous operation,24V input types 21.6 24 26.4 33 mA p-p 38 mA p-p See tolerance envelope APPLICATIONS The 2B-XM 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. Min Typ. Max. Units 2 W High VIN to low VIN 1.0 1.2 %% 5V output 7 8.5 % 9V output 4.5 5.2 % 12V output 4.5 5.5 % 15V output 3.7 8.5 % 2B0505XM,BW=DC to 20MHz 96 200 mA p-p 2B0509XM,BW=DC to 20MHz 67 200 mA p-p 2B0512XM,BW=DC to 20MHz 59 200 mA p-p 2B0515XM,BW=DC to 20MHz 53 200 mA p-p 2B1205XM,BW=DC to 20MHz 76 200 mA p-p 2B1209XM,BW=DC to 20MHz 63 200 mA p-p 2B1212XM,BW=DC to 20MHz 53 200 mA p-p 2B1215XM,BW=DC to 20MHz 45 200 mA p-p 10% load to rated load Ripple and Noise V 5V input types Voltage Set Point Accuracy ②Input Voltage ④Fixed Input Units 12V input types TA=-40°C to 85°C ⑤ Max. 4.5 Rated Power 2B 05 05 X M Typ 10.8 Load regulation MODEL SELECTION Min Continuous operation,12V input types Reflected ripple current Line regulation MTTF up to 2.3 million hours ① Conditions Continuous operation,5V input types OUTPUT CHARACTERISTICS Parameter Conditions Industry standard pinout MTTF1 Isolation Capacitance (PF) 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 Max. Unit 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 R ESERVES 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. http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 1 of 4 2B-XM Series 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 2B0505XM 790 2B0509XM 1154 2B0512XM 2265 2B0515XM 2998 2B1205XM 396 2B1209XM 880 2B1212XM 1156 2B1215XM 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. http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 2 of 4 2B-XM Series 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 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 http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 3 of 4 2B-XM Series 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. Microdc Professional Power Module,Inc. Tube length (4 Pin SIP) : 20.47 (520mm ±2mm). Tube Quantity :35 RoHS COMPLIANT INFORMATION Tel:0086-20-86000646 E-mail:[email protected] This series is compatible with RoHS soldering systems with a peak wave solder temperature of 300°C Website:http://www.microdc.cn for 10 seconds. The pin termination finish on the SIP package type is Tin Plate, Hot Dipped over Matte Microdc Professional Power module,Inc.makes no representation that Tin with Nickel Preplate. The DIP types are Matte Tin over Nickel Preplate. Both types in this series are the use of its products in the circuits described herein, or the use of other backward compatible with Sn/Pb soldering systems. technical information contained herein, will not infringe upon existing or future patent rights. Specifications are subject to change without notice. ©2010 Microdc Professional Power Module, Inc. Guangzhou REACH COMPLIANT INFORMATION This series has proven that this product does not contain harmful chemicals, it also has harmful chemical substances through the registration, inspection and approval. http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 4 of 4