B-XNS Series Isolated 1W Single Output DC/DC Converters SELECTION GUIDE FEATURES ◆ Footprint from 0.69cm2 ◆ I/O isolation voltage 1000VDC ◆ Operating Temperature: -40℃～﹢85℃ ◆ ◆ ◆ ◆ ◆ High efficiency up to 80% Fully encapsulated toroidal magnetics Internal SMD construction 3 Power density up to 0.85W/cm No electrolytic or tantalum capacitors ◆ 5V,9V,12V and 15V output ◆ No heatsink required ◆ Dual output from a single input rail ◆ UL 94V-0 package material ◆ No external compo nents required ◆ Industry standard pinout ◆ Power sharing on output Input Voltage (V) Output Voltage (V) Output Current (MA) Input Current (Rated Load) (MA) Efficiency Order code B0505XNS 5 5 200 289 B0509XNS 5 9 111 B0512XNS 5 12 B0515XNS 5 B0524XNS MTTF1 (%) Isolation Capacitance (PF) (KHRS) 69 30 3415 260 77 37 3078 83 256 78 33 2205 15 66 250 80 40 1532 5 24 42 248 80 48 900 B1205XNS 12 5 200 120 69 33 2493 B1209XNS 12 9 111 116 74 48 2311 B1212XNS 12 12 83 110 76 55 1780 B1215XNS 12 15 66 111 75 52 1313 B2405XNS 24 5 200 60 70 40 201 B2409XNS 24 9 111 55 75 59 185 B2412XNS 24 12 83 52 80 78 163 B2415XNS 24 15 66 52 80 79 136 B4805XNS 48 5 200 30 70 32 213 B4809XNS 48 9 111 28 75 50 194 B4812XNS 48 12 83 26 80 76 164 B4815XNS 48 15 66 26 80 75 140 1. Calculated using MIL-HDBK-217F with nominal input voltage at full load. All specications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specied. MTTF up to 3.4 million hours ◆ Input Characteristics Parameter Conditions MODEL SELECTION ① ② ③ ④ ⑤ ⑥ B 05 05 X N S ①Product Series ③Output Voltage ⑤Input exchanged ②Input Voltage ④Fixed Input ⑥SIP Package Voltage range Min. Typ. Max. Units Continuous operation,5V input 4.5 5 5.5 VDC Continuous operation,12V input 10.8 12 13.2 VDC Continuous operation, 15V input 13.5 15 16.5 VDC Continuous operation,24V input 21.6 24 26.4 VDC Continuous operation,48V input 43.2 48 52.8 VDC 20 40 mA p-p Reflected ripple current APPLICATIONS The B-XNS series of DC/DC converters is particular-ly 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 1 watt output at 85°C. For lower ripple,refer to output ripple reduction section. MICRODC R ESERVES THE COPYRIGHT http://www.microdc.cn Absolute Maximum Ratings Parameter Conditions Lead temperature 1.5mm from case for 10 seconds 300℃ Internal power dissipation 700mW Input voltage V , B05 types 7V Input voltage Vin, B12 types 15V Input voltage Vin, B15 types 18V Input voltage Vin, B24 types 28V Input voltage Vin, B48 types 54V Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 1 of 5 B-XNS Series Output Specifications Parameter Conditions Max. Units Rated Power TA= -40°C to 120°C Min. Typ. 1.0 W Rated Power(B24、B48) TA=0°C to 70°C 1.0 W Voltage Set Point Accuracy See tolerance envelope Line regulation High VIN to low VIN 1.2 %% Line regulation(B24、B48) High VIN to low VIN 1.2 %% Load regulation(B24、B48) 10% load to rated load, 5V output types 15 % 10% load to rated load,all other output types 10 % Load regulation(5Vinput、 12Vinput) Load regulation(15V input) Ripple＆Noise(B24、B48) 1.0 10% load to rated load, 5V output types 10 12.5 % 10% load to rated load, 9V output types 9 10 % 10% load to rated load,12V output types 6.5 7.5 % 10% load to rated load,15V output types 6 7.0 % 10% load to rated load, 5V output types 5.5 10 % 10% load to rated load,12V output types 2.6 3.0 % 10% load to rated load, 15V output types 2.3 3.0 % 150 mV p-p BW=DC to 20MHz, all input types Ripple＆Noise BW=DC to 20MHz, 5V output types 10 20 mV p-p BW=DC to 20MHz, 9V output types 7 15 mV p-p BW=DC to 20MHz, 12V output types 7.5 15 mV p-p BW=DC to 20MHz, 15V output types 8 15 mV p-p Isolation Characteristics Parameter Conditions Min. Isolation voltage Flash tested for 1 second 1000 Resistance Viso= 1000VDC Resistance(B24、B48) Viso= 500VDC 10 Conditions Min. Typ. Max. Units VDC 10 GΩ GΩ General Characteristics Parameter Switching frequency Switching frequency(B24、B48) Typ. Max. Units 5V input types 110 kHz 12V input types 140 kHz 15V input types 90 kHz All input types 100 kHz Temperature Characteristics Parameter Conditions Min. Max. Units Specification B05、B12、B15 -40 85 ℃ Specification B24、B48 0 70 ℃ Storage B05、B12、B15 -50 130 ℃ Storage B24、B48 -55 150 ℃ Case temperature rise 0505,1205 33 ℃ 0509,0512,0515,1209,1212,1215 28 ℃ 1505 26 ℃ ambient 1512,1515 17 ℃ Cooling Free air convection above Temperature derating graph Typ. Tolerance envelope ) 5V & 12V Input 24V & 48V Input W ( r e 70° c85° c w o P t u p t u O Ambient Temperature ( http://www.microdc.cn C) Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 2 of 5 B-XNS 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 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?" For a part holding no specific agency approvals, such as the B 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-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 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. Technical 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: 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. Ripple & Noise Characterisation Method Ripple and noise measurements are performed with the following test conguration. 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 lm, ±1% tolerance R2 50Ω BNC termination T1 3T of the coax cable through a ferrite toroid RLOAD R3 Resistive load to the maximum power rating of the DC/DC converter. Connections should be made via twisted wires 50Ω resistor, carbon film,±1% Measured values are multiplied by 10 to obtain the specied values. Differential Mode Noise Test Schematic http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 3 of 5 B-XNS Series OUTLINE DIMENSIONS ＆ FOOTPRINT DETAILS FOOTPRINT DETAILS MECHANICAL DIMENSIONS -4 PIN SIP SIP Package Pin Function +Vin -Vin -Vout +Vout 1 2 3 4 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: 1.48g (DIP)1.30g (SIP) 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. Recommended footprint details 4 PIN SIP Package TUBE OUTLINE DIMENSIONS 4 PIN SIP Tube Unless otherwise stated all dimensions in inches (mm) ±0.5mm. http://www.microdc.cn Tube length (4 Pin SIP) : 20.47 (520mm ±2mm). Tube Quantity :25 Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 4 of 5 B-XNS Series http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 5 of 5