B-XT MICRODC | Alldatasheet
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B B -XT -XT Series Series http://www.microdc.cn Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646 Page of SELECTION SELECTION GUIDE GUIDE Order code Input Output Efficiency Isolation Capacitance MTTF Voltage(VDC) Current (mA) Voltage (VDC) Current (mA) (%.Typ.) Nominal Rated Load pF KHrs B XT 3.3 410 3.3 303 5348 B 5XT 3.3 390 200 3847 B 309 XT 3.3 400 111 3134 B 312 XT 3.3 400 3473 B 315 XT 3.3 400 2473 B XT 270 3.3 303 5515 B 5XT 294 200 6857 B N XT 260 200 3933 B XT 278 167 6677 B XT 267 111 5501 B XT 260 3957 B 5XT 256 2747 B 5XT 124 200 4683 B XT 114 111 4008 B 121 XT 113 3121 B1215 XT 111 100 2316 Calculated using MIL-HDBK-217FN2 with nominal input voltage at full load. All specifications typical at TA=25 nominal input voltage and rated output current unless otherwise specified. MODEL MODEL SELECTION SELECTION B B X X T T Product Series Input Voltage Output Voltage Fixed Input SMD Package MICRODC RESERVES THE COPYRIGHT W , FIXED INPUT, ISOLA TED SINGLE OUTPUT SMD DC DC CONVERTER
FEATURES
1.37cm Short Circuit Protection(automatic recovery) I/O isolation voltage 000VDC Operating Temperature: -40 High efficiency up to 78% Toroidal magnetics Small SMD package with footprint Power density W/cm Lead frame technology Multi-layer ceramic capacitors Custom solutions available
APPLICATIONS
B -XT series are miniature,1W DC/DC converters with high isolation in a SMD package. With a new package design these converters are qualif i ed for the higher temperatures requested by lead-free ref l ow solder processes. With the small footprint, these converters are the ideal solution for board level power distribution,mainly for field. For automated SMD production lines the devices can be supplied in standard tape and reel package. Input Input Characteristics Characteristics Parameter Conditions Min. Typ. Max. Units Voltage range Continuous operation, V input 2.97 3.3 3.63 VDC Continuous operation, input 4.5 5.5 VDC Continuous operation, 12V input 10.8 13.2 VDC Start up time mA p-p I I solation solation Characteristics Characteristics Parameter Conditions Min. Typ. Max. Units Isolation voltag e Flash tested for secon d 1000 VDC Resistanc e Viso= 1000VD C G Ω General General Characteristics Characteristics Parameter Conditions Min. Typ. Max. Units Switching frequency All output types 110 kHz Absolute Absolute Maximum Maximum Ratings Ratings Parameter Conditions Lead temperature 1.5mm from case for second s 300 Internal power dissipation 600mW Input voltage V B types 5.5V Input voltage V in B types Input voltage V in B types 15V
B B -XT -XT Series Series http://www.microdc.cn Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646 Page of Output Output Specifications Specifications Parameter Conditions Min. Typ. Max. Units Rated Power TA=-40 C to C 0.1 1.0 W Voltage Set Point See tolerance envelope Line regulation High VIN to low VIN 1.0 1.2 Load regulation 10% load to rated load, 0303& 0503 10% load to rated load, 0505& 1205 12.8 10% load to rated load, 0506 9.2 10% load to rated load, 0509 1209 8.3 9.0 10% load to rated load, 0512& 1212 6.8 7.5 10% load to rated load, 0515& 1215 6.3 7.0 Ripple Noise BW=DC to 20MHz, 3.3V output types, 0305 0505 mV p-p BW=DC to 20MHz, 3.3V output types, mV p-p BW=DC to 20MHz, 0506 103 170 mV p-p BW=DC to 20MHz, 0509& 1209 mV p-p BW=DC to 20MHz, 0512& 1212 mV p-p BW=DC to 20MHz, 0515& 1215 mV p-p Note:1 12V input types have typically less load regulation change. Temperature Temperature Characteristics Characteristics Parameter Conditions Min. Typ. Max. Units Specification All output type s -40 Storage -55 125 Case temperature rise above ambient 0305, 309 0315 0303, 0312, 0503, 0505, 0509, 0512C, 0515 0505, 1205 209, 1212, 1215 Cooling Free air convection Technical Technical notes notes ISOLATION VOLTAGE Hi Pot Test Flash Tested Withstand Voltage Proof Voltage Dielectric Withstand Voltage Isolation Test Voltage are all terms that relate to the same thing, a test voltage, applied for a speci fi e d time, across a component designed to provide electrical isolation, to verify the integrity of that isolation. Professional Power Module B-XT series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 1kVDC for second. A question commonly asked is, What is the continuous voltage that can be applied across the part in normal operation? For a part holding no speci fi c agency approvals, such as the B-XT series, 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-accessible 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-XT 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 speci fi ed test voltage. This consideration equally applies to agency recognized parts rated for better than functional isolation where the wire enamel insulation is always supplemented by a further insulation system of physical spacing or barriers. Temperature Temperature derating derating graph graph
B B -XT -XT Series Series http://www.microdc.cn Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646 Page of http://www.microdc.cn Technical enquiries-Email:tech@microdc.cn Tel:0086-20-86000646 page Application Application Notes Notes Minimum load The minimum load to meet datasheet speci fi cation is 10% of the full rated load across the speci fi ed input voltage range. Lower than 10% minimum loading will result in an increase in output voltage, which may rise to typically double the speci fi ed 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 2.2 μ s and output capacitance of μ are shown in the table below. The product series will start into a capacitance of μ F with an increased start time, however, the maximum recommended output capacitance is μ Start-up time Start-up time μ s μ s B0303XT 437 B0506XT 7200 B0305XT 1359 B0509XT 3146 B0309XT 3435 B0512XT 4960 B0312XT 6590 B0515XT 7740 B0315XT 7625 B1205XT 895 B0503XT 533 B1209XT 2150 B0505XT 1368 B1212XT 3640 B0505NXT 721 B1215XT 7180 Ripple Noise Characterization Method Ripple and noise measurements are performed with the following test con fi guration. μ F X7R multilayer ceramic capacitor, voltage rating to be a minimum of times the output voltage of the DC/DC converter μ F 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 100m Ω at 100 kHz 100nF multilayer ceramic capacitor, general purpose 450 Ω resistor, carbon fi lm, tolerance Ω BNC termination 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 to obtain the speci fi ed values. Differential Mode Noise Test Schematic
B B -XT -XT Series Series http://www.microdc.cn Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646 Page of Application Application Notes Notes 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: It is required that the ESR (Equivalent Series Resistance) should be as low as possible, ceramic 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 that 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. Inductor Capacitor μ H SMD Through Hole μ F B0303XT 82103C 11R103C 4.7 B0305XT 82473C 11R103C 4.7 B0309XT 82223C 11R223C 2.2 B0312XT 82103C 11R103C B0315XT 82473C 11R473C B0503XT 82103C 11R103C 4.7 B0505XT 82473C 11R473C 4.7 B0505NXT 82473C 11R473C 4.7 B0506XT 82103C 11R103C 4.7 B0509XT 82223C 11R223C 2.2 B0512XT 82473C 11R473C B0515XT 82473C 11R473C B1205XT 82473C 11R473C 4.7 B1209XT 82223C 11R223C 2.2 B1212XT 82473C 11R473C B1215XT 82473C 11R473C Tolerance Tolerance Envelopes Envelopes 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.
B B -XT -XT Series Series http://www.microdc.cn Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646 Page of OUTLINE OUTLINE DIMENSIONS DIMENSIONS FOOTPRINT FOOTPRINT DETAILS DETAILS MECHANICAL MECHANICAL DIMENSIONS DIMENSIONS Note: Unit:mm[inch] Pin section toleranc e 0.10mm[ 0.004inch] General tolerances: 0.25mm[ 0.010inch] Weight: 1.21g SOLDER SOLDER PAD PAD DIMENSION DIMENSION Dimensions in [mm], Inch Pin pitch tolerances: 0.13 0.005) Other tolerances: 0.25 0.01) FOOTPRINT FOOTPRINT DETAILS DETAILS Pin Single -Vin +Vin N A -Vout +Vout N A N A N A NA Not available for electrical connection. TUBE TUBE OUTLINE OUTLINE DIMENSIONS DIMENSIONS Unless otherwise stated all dimensions in mm 0.5 (inches 0.02). Tube length 475 2.0 (18.70 0.07). Tube Quantity :35 Specifcations can be changed any time without notice. No parallel connection or plug and play. Note: The load shouldn't be less than 10%, otherwise ripple will increase dramatically. Operation under 10% load will not damage the converter; However, they may not meet all specification listed. All specifications measured at Ta=25 humidity<75%, nominal input voltage and rated output load unless otherwise specified. In this datasheet, all the test methods of indications are based on corporate standards. Only typical models listed, other models may be different, please contact our technical person for more details.
B B -XT -XT Series Series http://www.microdc.cn Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646 Page of Microdc Professional Power Module,Inc. Tel:0086-20-86000646 E-mail:tech@microdc.cn Website:http://www.microdc.cn Microdc Professional Power module,Inc.makes no representation that 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 future patent rights. Specifications are subject to change without notice. 2010 Microdc Professional Power Module, Inc. Guangzhou RoHS COMPLIANT INFORMATION This series is compatible with RoHS soldering systems with a peak wave solder temperature of 300 C for seconds. The pin termination finish on the SIP package type is Tin Plate, Hot Dipped over Matte Tin with Nickel Preplate. The DIP types are Matte Tin over Nickel Preplate. Both types in this series are backward compatible with Sn/Pb soldering systems. 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. Tape Tape Reel Reel Specifications Specifications Reel Packaging Details Product Orientation Pin located nearest to carrier drive sprocket. Reel Quantity 500 Reel Outline Dimensions Tape Outline Dimensions