MR50-xxSRW Series Compact, 50W Wide Input Railway DC/DC Converter Electrical Specifications Specifications typical @ +25°C, nominal input voltage & rated output current, unless otherwise noted. Specifications subject to change without notice. Input Key Features: Parameter • 50W Output Power • Meets EN 50155 • EN 60950 Approved • EN 50121-3-2 Compliant • Wide Input Range • 3,000 VAC rms Isolation • Reinforced Insulation • 92% Efficiency • Meets EN 61373 • Remote On/Off Input Voltage Range Input Start Voltage Under Voltage Shutdown Input Filter Conditions Min. 72 VDC Input 43.0 110 VDC Input 66.0 72 VDC Input 110 VDC Input 72 VDC Input 110 VDC Input PI () Filter Typ. 72.0 110.0 Conditions Typ. Max. 101.0 160.0 43.0 66.0 40.0 63.0 Units VDC VDC VDC Output Parameter Output Voltage Accuracy Line Regulation Load Regulation Ripple & Noise (20 MHz) Transient Response Time, See Note 2 Temperature Coefficient Output Over Load Protection Output Short Circuit Min. VIN = Min to Max IOUT = 0% to 100% See Note 1 25% Load Change Max. ±1.0 ±0.2 ±0.3 100 250 ±0.02 See Note 3 150 Continuous (Hiccup Mode) Units % % % mV Pk-Pk µS %/°C %IOUT General Parameter Isolation Voltage, Reinforced Insulation Isolation Resistance Isolation Capacitance Switching Frequency Conditions Input/Output Input/Output to Case 500 VDC 100 kHz/1V Min. 3,000 1,500 1,000 Typ. Max. 3,000 320 Units VAC rms VDC M pF kHz Environmental Parameter Operating Temperature Range Thermal Impedance, Without Heat Sink Thermal Impedance, With Heat Sink Operating Temperature Range Thermal Shutdown Cooling Humidity Conditions Ambient, See Note 4 Natural Convection 100 LFM 200 LFM 400 LFM Natural Convection 100 LFM 200 LFM 400 LFM Base Plate Base Plate Min. -40 7.5 6.1 5.3 3.9 6.8 4.1 3.3 2.2 -40 RH, Non-condensing Typ. +25 Max. +75 Units °C °C/W °C/W +105 °C +110 °C See Derating Curves (Page 3) 95 % Physical MicroPower Direct 292 Page Street Suite D Stoughton, MA 02072 USA T: (781) 344-8226 F: (781) 344-8481 E: [email protected] W: www.micropowerdirect.com Case Size Case Material Weight 2.28 x 1.45 x 0.78 Inches (57.90 x 36.8 x 20.00 mm) Black Anodized Aluminum Case with Aluminum Plate/Heat Sink 2.6 Oz (74.0g) Remote On/Off Parameter Unit On Unit Off Control Input Current, ON Control Input Current, OFF Control Common Standby Input Current Conditions Min. Typ. Max. 3.5 VDC - 12.0 VDC or Open Circuit 0 VDC - 1.2 VDC or Short Circuit VCTRL = 5V 0.5 VCTRL = 0V -0.5 Referenced to -VIN (Pin 3) 2.5 Units mA mA mA Reliability Specifications Parameter MTBF Conditions MIL HDBK 217F, 25°C, Gnd Benign Absolute Maximum Ratings, See Note 5 Parameter Conditions 77 VDC Input Input Voltage Surge (100 mS) 110 VDC Input Lead Temperature 1.5 mm From Case for 10 Sec Min. 314.9 Typ. Max. Units kHrs Min. -0.7 -0.7 Typ. Max. 165.0 250.0 260 Units www.micropowerdirect.com VDC °C www.micropowerdirect.com Model Selection Guide Model Number MR50-72S05RW MR50-72S12RW MR50-72S15RW MR50-72S24RW MR50-110S05RW MR50-110S12RW MR50-110S15RW MR50-110S24RW Input Voltage (VDC) Nominal Range 72 43 - 101 72 43 - 101 72 43 - 101 72 43 - 101 110 66 - 160 110 66 - 160 110 66 - 160 110 66 - 160 Current (mA) Full-Load No-Load 771 50 755 45 754 45 762 50 505 40 500 35 494 35 499 40 Output Voltage Current (VDC) (A) 5.0 12.0 15.0 24.0 5.0 12.0 15.0 24.0 Notes: 1. Output noise is measured with a 10 µF tantalum capacitor and a 1.0 µF ceramic capacitor connected in parallel across the output. Ripple & noise is 150 mV typical for 24 VDC output models. 2. Transient recovery is measured to within a 1% error band for a load step change of 75% to 100%. 3. Output overload protection is provided by a “hiccup” mode circuit 4. The ambient temperature range is the maximum possible for a converter with a heatsink mounted. Natural convection is 20 LFM, not “still air”. See the power derating curves on page 3 for the operating temperature limits for specific models. Fuse Over Reflected Efficiency Voltage Capacitive Rating Ripple Load Current Protection (µF, Max) (%, Typ) Slow-Blow (mA Typ) (VDC) 35 35 35 35 35 35 35 35 6.2 15 18 27 6.2 15 18 27 10.00 4.17 3.33 2.08 10.00 4.17 3.33 2.08 (mA) 17,000 2,950 1,900 740 17,000 2,950 1,900 740 90 92 92 91 90 91 92 91 2,100 2,100 2,100 2,100 1,500 1,500 1,500 1,500 5. Exceeding absolute maximum ratings may damage the module. These are not continuous operating ratings. 7. Operation at no-load will not damage these units, but they may not meet all specifications. 8. If the remote sense outputs are not used, the +Sense (pin 7) should be connected to +VOUT (pin 8) and the -Sense (pin 5) should be connected to -VOUT (pin 4). 9. It is recommended that a fuse be used on the input of a power supply for protection. For the correct rating, see the model selection table above. EMC Specifications Parameter Radiated Emissions Conducted Emissions ESD RS EFT Surge CS Standard See Note 1 EN 50121 See Note 1 EN 55011 EN 61000-4-2 EN 61000-4-3 See Note 2 EN 61000-4-4 See Note 2 EN 61000-4-5 EN 61000-4-6 Level Class A Class A Criteria A; ±8 kV Air, ±6 kV Contact Criteria A; 10V/m Criteria A; ±2 kV Criteria A; ±1 kV Criteria A; 10 V/m Notes: 1. To meet EN 55011 Class A, and EN 50121-3-2, an external input filter is required. See the connection diagram below for a typical circuit. 2. To meet EN 61000-4-4 and EN 61000-4-5, a capacitor should be connected across the input pins. See the connection diagram below for a typical example. Environmental Standards Parameter Vibration & Shock Cooling Test Dry Heat Damp Heat Standard EN 61373 EN 60068-2-1 EN 60068-2-2 EN 60068-2-30 Typical Connection For applications that require meeting EMC/EMI standards, the diagram above 4. Recommended values for components are: illustrates a typical connection of the MR50-xxxSxxRW series. The units Component 110 VIN 72 VIN do not require external components to operate as specified. Some notes on Fuse 2,100 mA 1,500 mA this diagram (starting with the input circuit) are: 68 µF/200V 68 µF/200V C1 1. It is recommended that an external slow blow fuse be used. The recommended fuse rating is shown in the table at right. 450 µH 450 µH L1 2. To meet EN 55011 Class A & EN 50121-3-2, an external input filter 2,200 pF/3 kV 2,200 pF/3 kV C3 is required. In the diagram this filter consists of C1 and L1. The recom2,200 pF/3 kV 2,200 pF/3 kV C4 mended component values are shown in the table at right. 2,200 pF/3 kV 2,200 pF/3 kV C5 3. To meet EN 61000-4-4 and EN 61000-4-5, a capacitor should be 2,200 pF/3 kV 2,200 pF/3 kV C6 connected across the input pins. In the connection diagram above, 4.7 µF 4.7 µF C7 the value of C1 should be changed to 470 µF/200V. 292 Page Street Ste D Stoughton, MA 02072 5. The circuit consisting of R1, Q1 and C2 illustrates a simple open collector connection for the remote on/off control. The resistor (R1) limits the current on the control line and the capacitor (C2) bypasses noise spikes, helping to prevent phantom triggering of the control. If the control pin is not being used, it should be left open. 7. The resister R2 is connected as an output adjust. The output adjustment capability is explained further on page 3. 8. The output sense pins (pin 7 and pin 5) may be used to compensate for the losses incurred over long leads to an output load. If not used for load compensation or output adjustment, the sense pins should be connected directly to the appropriate output pins, pin 7 to pin 8 and pin 5 to pin 4. 9. The output filtering capacitor (C7) is a low ESR (<1⍀) electrolytic capacitor. Care must be taken in choosing this capacitor not to exceed the capacitive load specification for the unit. • TEL: (781) 344-8226 • FAX: (781) 344-8481 • E-Mail: [email protected] www.micropowerdirect.com Derating Curves MR50-72S12RW, MR50-72S15RW & MR50-110S15RW without Heatsink MR50-72S12RW, MR50-72S15RW & MR50-110S15RW with Heatsink MR50-72S24RW, MR50-110S12RW & MR50-110S24RW without Heatsink MR50-72S24RW, MR50-110S12RW & MR50-110S24RW with Heatsink MR50-72S05RW & MR50-110S05RW without Heatsink MR50-72S05RW & MR50-110S05RW with Heatsink Output Voltage Adjustment A simple external circuit may be used to adjust the converter output. The range of adjustment is ±10%. To adjust the output down, connect a 5%, 3W resistor from the plus sense pin (7) to the VOUT trim pin (6). To adjust the output up, connect a 5%, 3W resistor from the minus sense pin (5) to the VOUT trim pin. For up/ down trimming, connect a 10 k⍀ potentiometer from the plus to the minus sense pins. Connect the wiper arm to the VOUT trim pin. For a table of trim resistor values, contact the factory. MicroPower Direct • 292 Page Street Ste D Stoughton, MA 02072 • TEL: (781) 344-8226 • FAX: (781) 344-8481 • E-Mail: [email protected] www.micropowerdirect.com Mechanical Dimensions Pin Connection Connections Pin 1 2 3 4 5 6 7 8 Mechanical Dimensions - With Optional Heatsink Description +VIN Remote On/Off On/Of -VIN -VOUT -Sense Trim +Sense +VOUT For the heatsink option, add suffix “H” to the model number (i.e. MR50-110S24RW-H) MicroPower Direct Mechanical Notes: • All dimensions are typical in inches (mm) • Tolerance x.xx = ±0.02 (±0.50) We Power Your Success - For Less! 292 Page Street Ste D Stoughton, MA 02072 • TEL: (781) 344-8226 • FAX: (781) 344-8481 • E-Mail: [email protected]