IMX4 Series Data Sheet 4 Watt DC-DC Converters Features * RoHS lead-free-solder and lead-solder-exempted products are available. * Input voltage ranges up to 121 VDC * Voltage withstand test 1500 VAC * 1 or 2 isolated outputs up to 48 V 20 0.8" 8.5 0.34" * Extremely wide input voltage ranges * Immunity according to IEC/EN 61000-4-2, -3, -4, -5, -6 32 1.25" * High efficiency (typ. 83%) * Flexible load distribution on outputs * Outputs no-load, overload, and short-circuit proof * High reliability * Operating ambient temperature - 40 to +85 C * Thermal protection * Industrial and alternative pinout * DIL 24 case with 8.5 mm profile Safety-approved to IEC 60950-1 2nd Ed and CSA/UL 60950-1 2nd Ed. 2 2 70IMX4 Description The IMX4 Series of board-mountable 4-watt DC-DC converters has been designed according to the latest industry requirements and standards. The converters are particularly suitable for use in mobile or stationary applications in transport, industry, or telecom, where variable input voltages or high transient voltages are prevalent. Covering a total input voltage range from 8.4 VDC up to 121 VDC with three different models, the converters are available with single or dual output from 3.3 up to 24 VDC with flexible load distribution. Features include efficient input and output filtering with unsurpassed transient and surge protection, low output ripple and noise, consistently high efficiency over the entire input voltage range and high reliability as well as excellent dynamic response to load and line changes. The converters exhibit basic insulation and are designed and Table of Contents models built according to the international safety standards IEC/EN 60950-1 2nd Ed. 70IMX4 models are CE-marked. A special feature is their small case size, DIL 24 with only 8.5 mm profile. The circuit is comprised of integrated planar magnetics, and all components are automatically assembled and solidly soldered onto a single PCB without any wire connection. Thanks to the rigid mechanical design, the converters withstand an extremely high level of shock and vibrations. Careful consideration of possible thermal stresses ensure the absence of hot spots providing long life in environments where temperature cycles are a reality. The thermal design allows operation at full load up to an ambient temperature of 85 C in free air without using any potting material. Several options, such as open-frame or an alternative industrial pinout, provide a high level of application-specific engineering and design-in flexibility. Page Page Description ............................................................................. 1 Model Selection ..................................................................... 2 Functional Description ........................................................... 3 Electrical Input Data ............................................................... 4 Electrical Output Data ............................................................ 6 Electromagnetic Compatibility (EMC) .................................... 8 Mechanical Data .................................................................... 9 Immunity to Environmental Conditions ................................ 10 Safety and Installation Instructions ...................................... 10 Description of Options ......................................................... 11 Copyright (c) 2015, Bel Power Solutions Inc. All rights reserved. MELCHER BCD20006-G Rev AE, 16-Sep-2015 The Power Partners. Page 1 of 12 IMX4 Series Data Sheet 4 Watt DC-DC Converters Model Selection Table 1: Model Selection Output 1 Vo1 nom Io1 nom [ VDC] [mA] 1 1 Output 2 Vo2 nom Io2 nom [ VDC] [mA] 1 Output power Po nom [W ] Input voltage range [ VDC] Efficiency min typ [%] [%] Model Options 3.3 3.3 900 900 - - 3.0 3.0 8.4 to 36 16.8 to 75 76 76 77.5 78 20IMX4-03-8 40IMX4-03-8 Z, G Z, G 5 5 5 5 700 700 700 700 - - 3.5 3.5 3.5 3.5 4.7 to 16.8 8.4 to 36 16.8 to 75 40 to 121 76 78 78 77 81 81 78 5IMX4-05-8 20IMX4-05-8 40IMX4-05-8 70IMX4-05-8 Z, G K, Z, G K, Z, G G 12 12 12 12 300 340 340 340 - - 3.6 4.1 4.1 4.1 4.7 to 16.8 8.4 to 36 16.8 to 75 40 to 121 79 78 78 77 82 82 82 5IMX4-12-8 20IMX4-12-8 40IMX4-12-8 70IMX4-12-8 Z, G K, Z, G K, Z, G G 15 15 15 15 250 280 280 280 - - 3.75 4.2 4.2 4.2 4.7 to 16.8 8.4 to 36 16.8 to 75 40 to 121 79 78 78.7 79 82 82 80.5 5IMX4-15-8 20IMX4-15-8 40IMX4-15-8 70IMX4-15-8 Z, G K, Z, G K, Z, G G +5 +5 +5 350 350 350 -5 -5 -5 350 350 350 3.5 3.5 3.5 8.4 to 36 16.8 to 75 40 to 121 77 76 75.5 81 81 78 20IMX4-0505-8 40IMX4-0505-8 70IMX4-0505-8 K, Z, G K, Z, G G +12 +12 170 170 -12 -12 170 170 4.1 4.1 8.4 to 36 16.8 to 75 76 76 82 82 20IMX4-1212-8 40IMX4-1212-8 K, Z, G K, Z, G +15 +15 140 140 -15 -15 140 140 4.2 4.2 8.4 to 36 16.8 to 75 78 76 82 82 20IMX4-1515-8 40IMX4-1515-8 K, Z, G K, Z, G +24 +24 80 80 -24 -24 80 80 3.8 3.8 8.4 to 36 16.8 to 75 76 76 83 83 20IMX4-2424-8 40IMX4-2424-8 Z, G Z, G Flexible load distribution on double-outputs is possible. Preferred for new designs. Part Number Description Input voltage range Vi 20 IMX4 - 05 05 -8 K Z G 4.7 to 16.8 VDC ........................................... 5 8.4 to 36 VDC ............................................ 20 16.8 to 75 VDC .......................................... 40 40 to 121 VDC ........................................... 70 Series ......................................................................... IMX4 Output voltage of output 1 ...................... 03, 05, 12, 15, 24 Output voltage of output 2 ............................ 05, 12, 15, 24 Operating ambient temperature range -40 to 85 C ...... -8 Options: Alternative pinout ......................................... K Open frame .................................................. Z RoHS compliant for all six substances ......... G Note: The sequence of options must follow the order above. This part number description is descriptive only; it is not inteded for creating part numbers. Example: 40IMX4-0505-8KG: DC-DC converter, input voltage range 16.8 to 75 V, 2 outputs providing 5 V, 350 mA, temperature range - 40 to 85 C, alternative pinout, RoHS-compliant for all si x substances MELCHER BCD20006-G Rev AE, 16-Sep-2015 The Power Partners. Page 2 of 12 IMX4 Series Data Sheet 4 Watt DC-DC Converters Functional Description 03046 The IMX4 Series converters are feedback-controlled flyback converters using current mode PWM (Pulse Width Modulation). The input is protected against transients by means of a suppressor diode. Vi+ 1 13 Vo+ n.c. 2 PWM The output voltage is monitored by a separate transformer winding close to the secondary windings and fed back to the control circuit. 12 Vo- Vi- 24 Current limitation is provided by the primary circuit, thus limiting the total output current (Io nom for single- and the sum Io1 nom + Io2 nom for dual-output models). The close magnetic coupling provided by the planar construction ensures very good regulation and allows for flexible load distribution on dual-output models. Fig. 3 Block diagram for single-output models with alternative pinout (option K). 03044 Vi+ 22 14 Vo+ 23 03047 15 Vo+ Vi+ 1 PWM PWM 16 Vo- 10 2 11 Vi- 3 Go 10 13 Vo- Vi- 24 Fig. 1 Block diagram for single-output models with standard pinout. Fig. 4 Block diagram for dual-output models with alternative pinout (option K). 03045 Vi+ 22 14 Vo+ 23 PWM 16 Go 2 Vi- 3 11 Vo- Fig. 2 Block diagram for dual-output models with standard pinout. MELCHER BCD20006-G Rev AE, 16-Sep-2015 The Power Partners. Page 3 of 12 IMX4 Series Data Sheet 4 Watt DC-DC Converters Electrical Input Data General conditions: TA = 25 C, unless TC is specified. Table 2: Input Data Input 5I MX4 20IMX4 40IMX4 70IMX4 Characteristics Conditions min typ max min typ max min typ max min typ max Vi Input voltage range 4.7 5.0 16.8 8.4 Vi nom Nominal input voltage TC min to TC max Io = 0 to Io nom Vi sur Repetitive surge voltage abs. max input (3 s) t start-up Converter start-up time1 Worst case condition at Vi min and full load t rise Rise time 1 Vi nom Io nom Ii o No-load input current Ci Input capacitance 5.0 0.25 0.5 121 40 100 0.25 0.5 0.25 0.5 150 0.3 -- 5 5 5 12 12 12 3 Vi = Vi nom Switching frequency Vi min to Vi max, Io = 0 to Io nom I i rr Reflected ripple current Io = 0 to Io nom -- 15 -- 0.54 20 5 VDC 70 -- Inrush peak current 10 5 0.3 0.6 s ms 10 mA 0.15 F 3.8 3.7 4.2 5.6 A 400 400 400 400 kHz -4 100 -- 1 Measured with a resistive or max. admissible capacitive load; see fig. 5 2 Operation at lower input voltage possible: Po approx. 80% of Po nom at Vi min = 14.4 V 3 Source impedance according to ETS 300132-2, version 4.3. 4 External capacitors required according to table 3. Start-up 40 resistive load Io = 0, Vi min to Vi max EN 55011/55022 75 40 capacitive load Iinr p Input RFI level conducted 20 -- fs vi RFI 36 16.8 2 Unit 60 A 30 A A mA pp Class Filter to Comply with EN 55011/55022 Vo trise Vo nom Electromagnetic emission requirements according to table Electrical Input Data can be achieved by adding an external capacitor as close as possible to the input terminals (see fig. 7 and table 3). 04008b t tstartup Fig. 5 04035b Vi+ Converter start-up and rise time + Inrush Current The inrush current has been kept as low as possible by choosing a very small input capacitance. A series resistor may be inserted in the input line to further limit this current. A 04034a 3 Ci Vi- Fig. 7 Input capacitors Table 3: Input electrolytic capacitors Model 20IMX4 40IMX4 70IMX4 Ci 100 F 50 V 47 F 100 V 330 F 200 V 2 1 0 Fig. 6 0 10 20 30 40 s Typ. inrush current at Vi nom, Po nom versus time measured according to ETS 300132-2, version 4.3 (40IMX4). MELCHER BCD20006-G Rev AE, 16-Sep-2015 The Power Partners. Page 4 of 12 IMX4 Series Data Sheet 4 Watt DC-DC Converters Input Transient Voltage Protection Fuse and Reverse Polarity Protection In many applications transient voltages on the converter input are always possible. These may be caused for example by short circuits between Vi+ and Vi-, where the network inductance may generate high energy pulses. The suppressor diode on the input also protects against reverse polarity input voltage. An external fast fuse is required to limit this reverse current; see table below. In order to protect the converter, a transient voltage suppressor diode is fitted at the input; see table below. Table 6: External input fuse Table 4: Built-in transient voltage suppressor Model Breakdown voltage VBR nom Peak power at 1 ms PP Peak pulse current I PP 5IMX4 -- -- -- 20IMX4 40 V 600 W 10.3 A 40IMX4 100 V 600 W 4.1 A 70IMX4 150 V 600 W 2.9 A Model Fuse type 5IMX4 Fast 1.6 A 20IMX4 Fast 1 A 40IMX4 Fast 0.5 A 70IMX4 Fast 0.315 A If transients generating currents above the peak pulse current I PP are possible, an external limiting network such as the circuit shown in figure 8 is recommended. It provides compliance with transients according to IEC/EN 61000-4-5, level 2. The comp onents are specified in table 5. If 40IMX4 converters should withstand 150 V transients according to 19Pfl1, the same external circuitry with similar components as shown in figure 8 can be used. 04036b Li Vi+ Ci + D Vi- Fig. 8 External circuitry to comply with IEC/EN 61000-4-5, level 2. Table 5: Components for the circuitry fig. 8 Model 20IMX4 40IMX4 70IMX4 Li 330 H, 0.42 W 1A 330 H, 0.42 W 0.6 A 330 H, 0.65 W 0.3 A Ci 68 F, 50 V 68 F, 100 V 100 F, 200 V D ON 1.5KE 39 A ON 1.5KE 82 A - MELCHER BCD20006-G Rev AE, 16-Sep-2015 The Power Partners. Page 5 of 12 IMX4 Series Data Sheet 4 Watt DC-DC Converters Electrical Out put Data General conditions: TA = 25 C, unless TC is specified. Table 7a: Output data for single-output models Output Vo nom 3.3 V Characteristics Conditions min Vo Output setting voltage Vi nom, Io = 0.5 Io nom 3.27 Io nom Output current (nom.) Vi min to Vi max 5IMX4 Io L Current limit 2 Vi nom Vo V Line regulation Vi min to Vi max, Io nom 1 1 1 1 V Load regulation Vi nom Io = (0.1 to 1) Io nom 3.5 3 3 3 vo Output voltage noise Vi min to Vi max I o = Io nom 80 80 120 150 typ 5V max min typ max 3.33 4.96 -- others 900 others 1260 1800 955 20 11.90 40 max min typ 12.10 14.88 340 20 max 250 V mA 280 375 1400 Unit 15.12 300 700 1000 5 5.04 15 V min typ 700 5IMX4 950 6 12 V 325 476 680 40 40 392 560 60 50 % mVpp 75 Vo clp Output overvoltage limitation Co ext Admissible capacitive load vo d Dynamic Voltage deviat. load Recovery time regulat. Vi nom Io = (1 to 0.5) Io nom 250 250 250 250 mV 1 1 1 1 ms Temperature coefficient Vo /TC Vi min to Vi max Io = (0.1 to 1) Io nom 0.02 0.02 0.02 0.02 %/K 5 V 12 V 15 V 24 V Unit td Vo Min. load 1% 130 0 680 130 0 680 130 0 150 130 0 100 % F Table 7b: Output data for dual-output models Output Vo nom Characteristics Conditions min Vo1 Vo2 Vi nom Io1 = Io2 = 0.5 Io nom 4.96 4.95 Output setting voltage I o nom Output current (nom.) 1 Io L Current limit 2 3 Vi min to Vi max typ max min 5.04 11.90 5.05 11.88 2 x 350 Vi nom, TC = 25 C typ max min 12.10 14.88 12.12 14.85 2 x 170 1000 typ max min 15.12 23.81 15.15 23.75 2 x 140 474 typ max 24.19 24.25 2 x 80 392 mA 232 Vo V Line regulation Vi min to Vi max, Io nom 1 1 1 1 V Load regulation 4 Vi nom Io = (0.1 to 1) Io nom 3 3.5 3 3 vo1, 2 Output voltage noise Vi min to Vi max I o = I o nom Vo clp Output overvoltage limitation 5 td Vo 1 2 3 4 5 6 Dynamic load regulat. Voltage deviat. Recovery time Temperature coefficient Vo /TC 40 Min. load 1% Co ext Admissible capacitive load 3 vo d 100 6 140 60 45 130 0 680 150 70 50 130 0 150 V 240 75 40 130 0 100 mVpp 120 130 0 % 47 % F Vi nom Io = (1 to 0.5) Io nom 250 600 750 750 mV 1 1 1 1 ms Vi min to Vi max Io = (0.1 to 1) Io nom 0.02 0.02 0.02 0.02 %/K Each output is capable of delivering full output power. The current limit is primary side controlled. Sum of both outputs Conditions for specified output. Other output loaded with constant current Io = 0.5 Io nom. BW = 20 MHz Measured with a probe according to EN 61204 MELCHER BCD20006-G Rev AE, 16-Sep-2015 The Power Partners. Page 6 of 12 IMX4 Series Data Sheet 4 Watt DC-DC Converters Thermal Considerations Connection in Parallel If a converter, mounted on a PCB, is located in free, quasistationary air (convection cooling) at the maximum ambient temperature TA max (see table Temperature specifications) and is operated at nominal input voltage and output power, the case temperature TC measured at the measuring point of case temperature TC (see Mechanical Data) will approach the indicated value TC max after the warm-up phase. However, the relationship between TA and TC depends heavily on the conditions of operation and integration into a system. The thermal conditions depend on input voltage, output current, airflow, temperature of surrounding components and surfaces and the properties of the printed circuit board. TA max is therefore only an indicative value, and under practical operating conditions, the ambient temperature TA may be higher or lower. Several converters with equal output voltage can be connected in parallel and will share their output current quite equally. However, this may cause start-up problems and is only recommended in applications, where one converter is able to deliver the full load current, e.g., in true redundant systems. Typical Performance Curves Vo [V] 05056b 5.25 5.0 4.75 4.5 Caution: The case temperature TC measured at the measuring point of case temperature TC (see Mechanical Data) may under no circumstances exceed the specified maximum. The installer must ensure that under all operating conditions TC remains within the limits stated in the table Temperature Specifications. 4.25 4.0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Io 0.9 1.0 A Fig. 10 Short Circuit Behavior Vo versus Io (typ) of single-output models (20IMX4-05) The current limitation shuts down the converter, when a short circuit is applied to the output. It acts self-protecting, and automatically recovers after removal of the overload condition. 05057a 31.5 31 05041a Vo [%] 30.5 overload short circuit condition 100 Vo1 + Vo2 [V] 30 switch-off 70 29.5 29 28.5 0 t [ms] 0.3 s 0 20 40 60 80 100 120 140 mA Io Fig. 11 Fig. 9 Vo versus Io (typ.) of dual-output models (15 V), with load connected between Vo+ and Vo -. Overload switch-off (hiccup mode). Vo1 [V] Output Overvoltage Protection The outputs are protected against overvoltages by Zener diodes. In the event of an overvoltage, the converter will shutdown and attempt to restart automatically. The main purpose of this feature is to protect against possible overvoltages, which could occur due to a failure in the feedback control circuit. The converters are not designed to withstand external overvoltages applied to the outputs. Connection in Series The outputs of single or dual-output models can be connected in series without any precautions, taking into consideration that the output voltage should remain below 60 V for SELV operation. 05058a 16.5 16 15.5 Io2 = 140 mA 15 Io2 = 14 mA 14.5 14 Io1 0 20 40 60 80 100 120 140 mA Fig. 12 Cross load regulation of dual-output models. Vo1 versus Io1 (typ) for various Io2 (40IMX4-1515). MELCHER BCD20006-G Rev AE, 16-Sep-2015 The Power Partners. Page 7 of 12 IMX4 Series Data Sheet 4 Watt DC-DC Converters Vo1 , Vo2 [V] [%] 05059b 12.8 05060a 90 Vi nom Vi max Vi min 80 12.4 70 Vo2 Vo1 12 60 11.6 11.2 50 Io1 0 30 60 120 90 150 % Io1 nom 40 25 Fig. 13 50 75 100 Po1 [%] Po nom Fig. 14 Flexible load distribution on dual outputs (2 x12 V) with load variation from 0 to 150% of Po1 nom on output 1. Output 2 loaded with 25% of Po2 nom. Efficiency versus input voltage and load. Typical values (40IMX4-1212). Electromagnetic Compatibility (EMC) Electromagnetic Immunity Table 8: Immunity type tests Phenomenon Standard Class level Coupling mode Value applied Waveform Source imped. Test procedure Electrostatic discharge to case IEC/ EN 61000-4-2 2 contact discharge 4000 Vp 1/50 ns 330 yes B 3 air discharge 8000 Vp 10 positive and 10 negative discharges 33 antenna 10 V/m AM 80% 1 kHz n.a. 80 - 1000 MHz yes A 3 antenna 10 V/m PM, 50% duty cycle, 200 Hz repetition frequ. n.a. 900 MHz yes A Electrical fast IEC/ EN transients/burst 61000-4-4 4 direct +i/-i 4000 Vp bursts of 5/50 ns 5 kHz repet. rate, 15 ms burst, 300 ms period 50 60 s positive 60 s negative coupling mode yes B Surges IEC/ EN 61000-4-5 24 +i/-i 1000 Vp 1.2/50 s 2 5 pos. and 5 neg. surges yes B RF conducted immunity IEC/ EN 61000-4-6 3 +i/-i 3 VAC (140 dBV) AM 80% 1 kHz 50 0.15 to 80 MHz 150 W yes A Electromagnetic IEC/ EN field 61000-4-3 In Peroper. form. 2 1 i = input, o = output 2 Performance criterion: A = normal operation, no deviation from specifications, B = temporary loss of function or deviation from specs. 3 Corresponds to the railway standard EN 50121-3-2:2000, table 9.1 4 External components required. MELCHER BCD20006-G Rev AE, 16-Sep-2015 The Power Partners. Page 8 of 12 IMX4 Series Data Sheet 4 Watt DC-DC Converters Electromagnetic Emission Mechanical Data Conducted RFI noise at input according to EN 55011/55022 Dimensions in mm (inchies). Tolerances 0.3 mm, unless noted 20IMX4-2424-8, Peak Vi+, conducted, 0.15 - 30 MHz, Uster, 30-Jun-06 Ci = 100 F, Vi = 20 V, Ro = 660 ohm, lead length 10 cm. dbV EN 55011 A 70 20IMX4-cond_P 80 European Projection 33 (1.3") 60 11 x 2.54 (0.1") 50 15.24 (0.6") 30 20 10 1 2 5 10 12 1 20 MHz Fig. 15a Typical disturbance voltage (peak) at the pos. input according to EN 55011/55022, measured at Vi nom and Io nom. Measuring point of case temperature TC Output leads 0.1 m, twisted. Input capacitors see table 3. (20IMX4-2424-8). s09042c 0.5 (0.02") 40IMX4-05-8Z, Peak Vi+, conducted, 0.15 - 30 MHz, Uster, 30-Jun-06 Ci = 47 F, Vi = 40 V, Ro = 8.2 ohm, lead length 10 cm. dbV 8.5 +0 /-0.1 (0.33") 0.5 24 3.1 (0.12.2") 0.2 13 20 (0.79") 40 EN 55011 A 70 40IMX4-cond_P 80 60 Fig. 16 Case with standard or alternative pinout (option K) Material: Fortron black; weight: <10 g 50 40 30 20 31 (1.22") 10 11 x 2.54 (0.1") 2 5 10 20 MHz Fig. 15b Typical disturbance voltage (peak) at the pos. input according to EN 55011/55022, measured at Vi nom and Io nom. Output leads 0.1 m, twisted. Input capacitors see table 3. 24 12 1 3 (0.12") S90004a (40IMX4-05-8Z). 0.5 (0.02") 70IMX4-15-8, Peak Vi+, conducted, 0.15 - 30 MHz, Uster, 1-Sep-06 Ci = 330 F, Vi = 70 V, Ro = 68 ohm, lead length 10 cm. dbV 13 20 (0.79") 1 EN 55011 A 70 70IMX4-cond_P 80 8.5 (0.33") 0.5 15.24 (0.6") 0.2 Fig. 17 60 Open frame (option Z) 50 Weight: <10 g 40 30 20 10 0.2 0.5 1 2 5 10 20 MHz Fig. 15c Typical disturbance voltage (peak) at the pos. input according to EN 55011/55022, measured at Vi nom and Io nom. Output leads 0.1 m, twisted. Input capacitors see table 3. MELCHER BCD20006-G Rev AE, 16-Sep-2015 The Power Partners. Page 9 of 12 IMX4 Series Data Sheet 4 Watt DC-DC Converters Immunity to Environmental Conditions Table 9: Mechanical and climatic stress Test Method Standard Test conditions Ca Damp heat steady state IEC/EN 60068-2-78 MIL-STD-810D section 507.2 Temperature: Relative humidity: Duration: 40 2 C 93 +2/-3 % 56 days Converter not operating Status Ea Shock (half-sinusoidal) IEC/EN 60068-2-27 1 MIL-STD-810D section 516.3 Acceleration amplitude: Bump duration: Number of bumps: 100 gn = 981 m/s2 6 ms 18 (3 each direction) Converter operating Eb Bump (half-sinusoidal) IEC/EN 60068-2-29 MIL-STD-810D section 516.3 Acceleration amplitude: Bump duration: Number of bumps: 40 gn = 392 m/s2 6 ms 6000 (1000 each direction) Converter operating Fc Vibration (sinusoidal) IEC/EN 60068-2-6 Acceleration amplitude: Converter operating Frequency (1 Oct/min): Test duration: 0.35 mm (10 to 60 Hz) 5 gn = 49 m/s2 (60 to 2000 Hz) 10 to 2000 Hz 7.5 h (2.5 h each axis) Fh Vibration, broad-band random (digital control) IEC/EN 60068-2-64 Acceleration spectral density: Frequency band: Acceleration magnitude: Test duration: 0.05 g n2/Hz 10 to 500 Hz 4.9 g n rms 3 h (1 h each axis) Converter operating Kb Salt mist, cyclic (sodium chloride NaCl solution) IEC/EN 60068-2-52 Concentration: Duration: Storage: Cycles and storage duration: 5% (30 C) 2 h per cycle 40 C, 93% rel. humidity 3 days, 22 h per cycle Converter not operating 1 Covers also EN 50155/EN 61373 category 1, class B, body mounted (= chassis of coach) Temperatures Table 10: Temperature specifications, valid for air pressure of 800 to 1200 hPa (800 to 1200 mbar) Temperature Standard (-8) Characteristics Conditions min max TA Ambient temperature Operational 1 -40 85 TC Case temperature -40 105 TS Storage temperature -55 105 1 See Thermal Considerations Non operational Unit C Failure Rates Table 11: MTBF MTBF 40IMX4-05-8 (MIL-HDBK-217F) 40IMX4-1212-8 (Bellcore) Ground benign TC = 40 C Ground fixed TC = 40 C TC = 70 C Ground mobile TC = 50 C Unit h 890 000 440 000 247 000 362 000 3 535 000 1 768 000 917 000 476 000 MELCHER BCD20006-G Rev AE, 16-Sep-2015 The Power Partners. Page 10 of 12 IMX4 Series Data Sheet 4 Watt DC-DC Converters Safety and Installation Instructions Standards and Approvals Installation Instruction The converters are approved according to UL/CSA 60950-1 and IEC/EN 60950-1 2nd Edition. Installation of the dc-dc converters must strictly follow the national safety regulations in compliance with the enclosure, mounting, creepage, clearance, casualty, markings and segregation requirements of the end-use application. Connection to the system shall be made via a printed circuit board; see Mechanical Data. The converters should be connected to a secondary circuit. Do not open the converter. Ensure that a converter failure does not result in a hazardous condition. To prevent excessive current flowing through the input lines in case of a short-circuit, an external fuse specified in table 6 should be installed in the non-earthed input supply line. The converters have been evaluated for: * Building-in * Basic insulation input to output, based on their maximum input voltage * Pollution degree 2 environment * Connecting the input to a secondary circuit, which is subject to a maximum transient rating of 1500 V for 20IMX4 and 40IMX4, and 2000 V for 70IMX4 models. The converters are subject to manufacturing surveillance in accordance with the above mentioned standards and with ISO 9001:2008. Railway Applications To comply with railway standards, all components are coated with a protective lacquer (except option Z). Pin Allocation Protection Degree and Cleaning Liquids 10013b 13 24 The protection degree of the converters (except opt. Z) is IP 40 for models with Revision BA (or later). Older models have IP 30. 1 In order to avoid possible damage, any penetration of cleaning fluids should be prevented, since the power supplies are not hermetically sealed. Bottom view 12 Fig. 18 Foot print Table 12: Pin allocation for standard and option Z Pin Single-output models Dual-output models 2 Vi- Vi- 3 Vi- Vi- 10 n.c. -- However, open-frame models (option Z) leave the factory unlacquered; they may be lacquered by the customer, for instance together with the mother board. Cleaning agents are not permitted - except washing at room temperature with isopropyl alcohol. If necessary, the mother board must be cleaned, before fitting the open-frame converter. Note: Cleaning liquids may damage the adhesive joints of the ferrite cores. 11 -- Vo- Isolation 14 Vo+ Vo+ 16 Vo- Go 22 Vi+ Vi+ The electric strength test is performed in the factory as a routine test in accordance with EN 50514 and IEC/EN 60950. The Company will not honor any warranty claims resulting from incorrectly executed electric strength field tests. 23 Vi+ Vi+ Table 14: Electric strength test voltages Table 13: Pin allocation for option K Pin Single-output models Dual-output models 1 Vi+ Vi+ 2 n.c. -- 10 -- Go 11 -- Go 12 Vo- -- 13 Vo+ Vo- 15 -- Vo+ 24 Vi- Vi- Characteristic Input to output 5IMX4 20/40IMX4 70IMX4 Unit 0.77 1.5 1 1.5 kVAC Equivalent DC test voltage 1.0 2.0 1 2.0 kVDC Coupling capacitance 2.2 typ. 1.1 typ. 1.1 nF -- >100 >100 M Factory test >1 s Insulation resist. (500 VDC) 1 Converters produced 2013 or later; older units were tested with 1.2 kVAC. MELCHER BCD20006-G Rev AE, 16-Sep-2015 The Power Partners. Page 11 of 12 IMX4 Series Data Sheet 4 Watt DC-DC Converters Description of Options Option K: Alternative Pinout This pinout is compatible with other converters on the market. Option Z: Open Frame For applications, where the protection of the case is not necessary or in the case that the motherboard should be cleaned and lacquered with the converter fitted. Option G: RoHS-6 Converters with a type designation ending with G are RoHScompliant for all six substances. NUCLEAR AND MEDICAL APPLICATIONS - These products are not designed or intended for use as critical components in life support systems, equipment used in hazardous environments, or nuclear control systems. TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the date manufactured. Specifications are subject to change without notice. Copyright (c) 2015, Bel Power Solutions Inc. All rights reserved. www.belpowersolutions.com/power MELCHER BCD20006-G Rev AE, 16-Sep-2015 The Power Partners. Page 12 of 12