A-XD&A-XS Series Isolated 1W Dual Output DC/DC Converters SELECTION GUIDE Input Order code Output Isolation Efficiency Capacitance MTTF1 Voltage(VDC) Current (mA) Voltage Current Nominal MAX (VDC) (mA) pF KHrs A0505XS 5 289 ±5 ±100 69 28 3103 A0509XS 5 267 ±9 ±55 75 32 2257 A0512XS 5 260 ±12 ±42 77 34 1579 A0515XS 5 256 ±15 ±33 78 36 1065 A1205XS 12 120 ±5 ±100 69 33 2193 A1209XS 12 113 ±9 ±55 74 46 1734 Operating Temperature: -40℃～﹢85℃ A1212XS 12 111 ±12 ±42 75 55 1303 A1215XS 12 110 ±15 ±33 76 54 932 ◆ High efficiency up to 80% A1505XS 15 91 ±5 ±100 71 39 1941 Fully encapsulated toroidal magnetics A1512XS 15 87 ±12 ±42 78 68 790 ◆ A2412XS 24 52 ±12 ±42 80 65 134 ◆ Internal SMD construction A2415XS 24 52 ±15 ±33 80 95 101 A4805XS 48 30 ±5 ±100 70 26 206 A4809XS 48 26 ±9 ±55 80 38 174 No electrolytic or tantalum capacitors A4812XS 48 26 ±12 ±42 80 52 139 A4815XS 48 26 ±15 ±33 80 56 104 ◆ 5V,9V,12V and 15V output A0505XD 5 289 ±5 ±100 69 28 3103 ◆ No heatsink required A0509XD 5 267 ±9 ±55 75 32 2257 A0512XD 5 260 ±12 ±42 77 34 1579 ◆ Dual output from a single input rail A0515XD 5 256 ±15 ±33 78 36 1065 A1205XD 12 120 ±5 ±100 69 33 2193 A1209XD 12 113 ±9 ±55 74 46 1734 A1212XD 12 111 ±12 ±42 75 55 1303 A1215XD 12 110 ±15 ±33 76 54 932 A1505XD 15 91 ±5 ±100 71 39 1941 FEATURES ◆ ◆ ◆ ◆ ◆ ◆ ◆ Footprint from 1.17cm2 I/O isolation voltage 1000VDC Power density up to 0.85W/cm3 UL 94V-0 package material No external components required (%.Typ.) ◆ Industry standard pinout ◆ Power sharing on output A1512XD 15 87 ±12 ±42 78 68 790 A2412XD 24 52 ±12 ±42 80 65 134 ◆ MTTF up to 3.1 million hours A2415XD 24 52 ±15 ±33 80 95 101 A4805XD 48 30 ±5 ±100 70 26 206 A4809XD 48 26 ±9 ±55 80 38 174 A4812XD 48 26 ±12 ±42 80 52 139 A4815XD 48 26 ±15 ±33 80 56 104 MODEL SELECTION ① ② ③ ④ ⑤ A 05 05 X S ①Product Series ③Output Voltage ⑤SIP Package ②Input Voltage ④Fixed Input 1. Calculated using MIL-HDBK-217F with nominal input voltage at full load. All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified. Input Characteristics Parameter Conditions APPLICATIONS The A-X(S)D series of industrial temperature range DC/DC converters are the standard building blocks for on-board distributed power systems.They are ideally suited for providing dual rail supplies on primarily digital boards with the added benefit of galvanic isolation to reduce switching noise.All of the rated power may be drawn from a single pin provided the total load does not exceed 1 Watt. MICRODC R ESERVES THE COPYRIGHT http://www.microdc.cn Voltage range Min. Max. Units 5 5.5 VDC 12 13.2 VDC 15 16.5 VDC 21.6 24 26.4 VDC 43.2 48 52.8 VDC 20 40 mA p-p Continuous operation,5V input 4.5 Continuous operation,12V input 10.8 Continuous operation, 15V input 13.5 Continuous operation,24V input Continuous operation,48V input Reflected ripple current Typ. Absolute Maximum Ratings Parameter Conditions Lead temperature 1.5mm from case for 10 seconds 300℃ Internal power dissipation 450mW Input voltage V , A05 types 7V Input voltage Vin, A12 types 15V Input voltage Vin, A15 types 18V Input voltage Vin, A24 types 28V Input voltage Vin, A48 types 54V Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 1 of 5 A-XD&A-XS Series Output Specifications Parameter Conditions Max. Units Rated Power TA= -40°C to 120°C Min. Typ. 1.0 W Rated Power(A24、A48) 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(A24、A48) High VIN to low VIN 1.2 %% Load regulation(A24、A48) 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(A24、A48) 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 Typ. Max. Units Resistance Viso= 1000VDC Resistance(A24、A48) Viso= 500VDC 10 Parameter Conditions Min. 5V input types 110 kHz Switching frequency 12V input types 140 kHz 15V input types 90 kHz All input types 100 kHz VDC 10 GΩ GΩ General Characteristics Switching frequency(A24、A48) Typ. Max. Units Temperature Characteristics Parameter Conditions Min. Max. Units Specification A05、A12、A15 -40 85 ℃ Specification A24、A48 0 70 ℃ Storage A05、A12、A15 -50 130 ℃ Storage A24、A48 -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 A-XD&A-XS 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 A 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 A 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 greatre degree depending on materials. Construction and environment. The A 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 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 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 specified values. Differential Mode Noise Test Schematic http://www.microdc.cn Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 3 of 5 A-XD&A-XS Series OUTLINE DIMENSIONS ＆ FOOTPRINT DETAILS MECHANICAL DIMENSIONS DIP Package FOOTPRINT DETAILS SIP Package -14 PIN DIP Pin 1 7 8 9 11 14 -7 PIN SIP Function -Vin NC 0V +Vout -Vout +Vin Pin Function 1 +Vin -Vin -Vout 0V +Vout 2 4 5 6 NC - Not available for electrical connection. 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. 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: 2.4g (DIP) 2.1g (SIP) 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 14 PIN DIP Package http://www.microdc.cn 7 PIN SIP Package Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 4 of 5 A-XD&A-XS Series TUBE OUTLINE DIMENSIONS 14 PIN DIP Tube Unless otherwise stated all dimensions in inches (mm) ±0.5mm. http://www.microdc.cn 7 PIN SIP Tube Tube length (14 Pin DIP) : 20.47 (520mm ±2mm). Tube length (7 Pin SIP) : 20.47 (520mm ±2mm). Tube Quantity :25 Technical Enquiries-Email:[email protected] Tel:0086-20-86000646 Page 5 of 5