IMX70, IMY70 Series Data Sheet 70 to 90 Watt DC-DC Converters Features * RoHS compliant for all six substances * Extremely wide input voltage ranges up to 154 VDC * 1 or 2 outputs up to 48 V * Basic insulation: IMX models 63.5 2.5" 12.5 0.49" 76.2 3" * Class I equipment with reinforced insulation: IMY models * 1500 to 3000 VAC i/o electric strength test voltage * Electrical isolation between outputs * Programmable input undervoltage lockout * Shutdown/inhibit input * Adjustable output voltages with flexible load distribution * Sense lines and current share option * External frequency synchronization * Output(s) no-load, overload, and short-circuit proof * Operating ambient temperature from - 40 to 95 C 47.8 1.88" 9.75 0.38" 72.7 2.86" * Thermal protection * Planar technology for best stability * Metallic case with 12.5 mm profile or open frame with 9.75 mm Safety-approved to IEC/EN 60950 -1 and UL/CSA 60950-1 2nd Edition. CE mark for 110IMY70. Description The IMX/IMY70 Series of board-mountable 70 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, railways, industry, or telecommunication, where variable input voltages or high transient voltages are prevalent. Covering a total input voltage range from 14.4 V up to 154 V with 3 different models, the converters are available with one or two electrically isolated outputs from 5 V to 48 V, externally adjustable and with flexible load distribution. A shutdown input allows remote converter on/off. Features include consistently high efficiency over the entire input voltage range, high reliability, and excellent dynamic response to load and line changes. The converters are designed according to the international safety standards IEC/EN/UL 60950-1 2nd Edition. The converters 24IMX70 and 40IMX70 exhibit basic insulation for the Table of Contents specified input voltage, whereas the converters 110IMY70 have reinforced insulation. The circuit is comprised of 2 planar magnetic devices. The components are automatically assembled and securely soldered onto a single PCB without any wire connection. Magnetic feedback ensures maximum repeatability in the control loop over all operating conditions and best reliability. Careful consideration of possible thermal stress ensure the absence of hot spots, such providing long life in environments, where temperature cycles are present. The thermal design without using any potting material allows operation up to an ambient temperature of 70 C in free air and up to 100 C with forced cooling. For extremely high vibration environments the case has holes for screw mounting. Page Page Description ............................................................................ 1 Model Selection ..................................................................... 2 Functional Description .......................................................... 3 Electrical Input Data .............................................................. 4 Electrical Output Data ............................................................ 6 Auxiliary Functions ............................................................... 10 Electromagnetic Compatibility (EMC) ................................. 11 Immunity to Environmental Conditions ............................... 12 Mechanical Data .................................................................. 13 Safety and Installation Instructions ..................................... 14 Options ................................................................................ 15 Copyright (c) 2015, Bel Power Solutions Inc. All rights reserved. BCD.00002 Rev AH, 17-Aug-2015 MELCHER The Power Partners. Page 1 of 15 IMX70, IMY70 Series Data Sheet 70 to 90 Watt DC-DC Converters Model Selection Table 1: Model Selection Output 1 1 2 3 Output 2 Effic. 1 Input voltage [V] Vi cont [V] Vi max2 - 12 21.6 43.2 15 to 33.6 25 to 72 50 to 137.5 40.1 75 154 89.5 91 - - 12 21.6 43.2 15 to 33.6 25 to 72 50 to 137.5 40.1 75 154 91 93 90 93 5.7 6.0 6.0 - - 12 21.6 43.2 15 to 33.6 25 to 72 50 to 137.5 40.1 75 154 91 92 90 93 1.3 1.3 1.3 24 24 24 1.3 1.3 1.3 12 21.6 43.2 15 to 33.6 25 to 72 50 to 137.5 40.1 75 154 87 90 89 91 Vo nom [V] Ionom [A] Vo nom [V] Io nom [A] V i min2 5.1 5.1 5.1 12 12 12 - 12 12 12 7.0 7.5 7.5 15 15 15 24 24 24 [V] min. [%] Model Opt. 24IMX70-05-0TG 3 40IMX70-05-0TG 3 110IMY70-05-0TG i, Z 24IMX70-12-0TG 40IMX70-12-0TG 3 110IMY70-12-0TG i, Z 24IMX70-15-0TG 40IMX70-15-0TG 3 110IMY70-15--0TG i, Z 24IMX70-24-24-0G 40IMX70-24-24-0G 3 110IMY70-24-24-0G i, Z typ. [%] Efficiency at TA = 25 C, Vi nom, Io nom Short time; see table 2 for details Contact the Company for lead times and availability. Note: The sequence of options/features must follow the order above. Part Number Description 110 IMY 70 - 24 - 24 - 0 i Z G Input voltage Vi 24 V battery ................................................ 24 36 V and 48 V battery ................................. 40 72 V, 96 V, 110 V battery .......................... 110 Series .......................................................... IMX70, IMY70 Output voltage of output 1 ............................ 05, 12, 15, 24 Output voltage of output 2 ............................ 05, 12, 15, 24 Operating ambient temperature range TA = -40 to 95 C ...................................... - 0 Options: Inhibit ............................................................ i Current sharing function ........................... T 1 Open frame ................................................. Z Feature: RoHS-compliant for all 6 substances ...... G 2 1 2 Standard feature for single-output models, not available for dual-output models G is standard and is placed at the end of the part number Note: The sequence of options/features must follow the order above. Product Marking Converters without option Z are marked with the type designation, input and output voltages and currents, applicable safety approval and recognition marks, company logo, date code, and serial no. BCD.00002 Rev AH, 17-Aug-2015 MELCHER The Power Partners. Page 2 of 15 IMX70, IMY70 Series Data Sheet 70 to 90 Watt DC-DC Converters Functional Description The IMX/IMY70 Series converters are comprised of a feedback-controlled forward converter using current-mode pulse width modulation (PWM). The switching frequency is fixed; it can by externally synchronized for double-output models. The main transformer and the output choke are designed in planar technology, which guarantees excellent mechanical features and reproducibility of electric properties. No optocouplers are used. Single-output converters exhibit at the output a synchronous rectifier and sense lines to ensure accurate output voltage regulation. An auxiliary input R allows adjustment of the output voltage. Proper parallel operation is possible using the current sharing feature. Double-output converters exhibit Schottky diodes at both outputs. The first output voltage is sensed and accurately regulated by influencing the PWM via the magnetic feedback. n.c.1 1 8 6 8 The input voltage is monitored, shutting down the converter in an overvoltage condition. The minimum input voltage for startup can be externally adjusted, which helps to limit the input current at low input voltage. JM027c 11 T 8 Secondary control circuit Isolation Vi+ An incorporated protection disables the converter in an overtemperature condition. The converter automatically recovers, after the temperature has dropped below the limit. Primary control circuit Opt. i 2 A current limitation circuits limits the possible output power. The topology allows for single-output models an unlimited output capacity and for double-output models a high output capacity; see Electrical Output Data. 1 k Ref 7 SD PUL The output voltage is transferred to the primary side by magnetic feedback via a pulse transformer. The 2nd output is tracking. The close magnetic coupling of the main transformer and the main choke guarantee minor deviation of both output voltages. Both outputs can be simultaneously adjusted by the R input located on the secondary side. 5 19 19 R Synchr. rect. drive 13 S+ NTC 16 Vo+ Vi+ 4 17 Input filter Vi- 2 14 Vo- Vi- 2 15 Auxiliary converter 350 kHz 3 Cy 13 S- 18 Cy 12 1 Fig. 1 2 Not connected n.c.1 Connected for 24IMX models only Block diagram of single-output models SD W 1 8 6 8 JM026c 1 k 11 n.c.1 Primary control circuit 8 Opt. i Secondary control circuit Isolation Ref 7 PUL 19 R 19 PTC 13 Vo2+ Vi+ 2 5 Vi+ 4 14 Vo2- Input filter Vi- 16 Vo1+ 2 Vi- 2 3 15 Vo1- Cy Fig. 2 1 Not connected 2 Cy Connected for 24IMX models only 18 17 12 n.c.1 n.c.1 n.c.1 Block diagram of double-output models BCD.00002 Rev AH, 17-Aug-2015 MELCHER The Power Partners. Page 3 of 15 IMX70, IMY70 Series Data Sheet 70 to 90 Watt DC-DC Converters Electrical Input Data General conditions: TA = 25C, shutdown and R pin left open-circuit, unless specified. Table 2: Input data Input 24IMX70 Conditions min Vi Operating input voltage TA min to TA max, Io = 0 - Io nom 15 1 Vi nom Nominal input voltage Vi 2s Temporary input voltage for 2 s, no shutdown 12 1 Vi sur Repetitive surge voltage shutdown, no damage 50 t start up Converter start-up time Worst case condition at Vi min and full load 500 Switch on -- SD high typ 40 IMX70 Characteristics max min 33.6 25 1 40.1 21.6 1 24 typ Unit max 72 VDC (36) 48 75 100 ms 500 t rise Rise time Vi = 0 Vi nom, Io nom Ii o No-load input current Io = 0, Vi min - Vi max Iirr Reflected ripple current Io = 0 - Io nom Iinr p Inrush peak current Vi = Vi max 25 A Ci Input capacitance for surge calculation 24 F V -- Shutdown voltage Converter disabled SD 25 200 30 - 0.7 to +0.7 Converter operating I S-D- Shutdown pin current I i S-D- Input current at shutdown Vi fs Switching frequency Vi min - Vi max, Io = 0 - Io nom mA - 0.7 to +0.7 2 to 20 (or open-circuit) - Vi max V 2 to 20 (or open-circuit) - 0.2 min mA 2 200 2 Input 210 2 110IMY70 Characteristics mApp Conditions min TA min to TA max, Io = 0 - Io nom typ kHz Unit max Vi Operating input voltage Vi nom Nominal input voltage Vi 2s Temporary input voltage for 2 s, no shutdown Vi sur Repetitive surge voltage shutdown, no damage t start up Converter Switch on start-up time -- SD high Worst case condition at Vi min and full load t rise Rise time Vi = 0 Vi nom, Io nom Ii o No-load input current Io = 0, Vi min - Vi max I irr Reflected ripple current Io = 0 - Io nom I inr p Inrush peak current Vi = Vi max 35 A Ci Input capacitance for surge calculation 7.7 F VS-D- Shutdown voltage Converter disabled - 0.7 to +0.7 V I S-D- Shutdown pin current I i S-D- Input current at shutdown Vi fs Switching frequency Vi min - Vi max, Io = 0 - Io nom 2 137.5 VDC (72, 96,) 110 Converter operating 1 50 200 43.2 1 154 168 250 500 25 25 50 mA 200 mA pp 2 to 20 (or open-circuit) - 0.2 min ms 500 - Vi max mA 2 200 2 210 2 kHz Vi min will not be as stated, if Vo is increased above Vo nom by use of R-input. If the output voltage is set to a higher value, Vi min will be proportionately increased. typ. 240 kHz for single-output models, typ. 300 kHz for models with 5 V output BCD.00002 Rev AH, 17-Aug-2015 MELCHER The Power Partners. Page 4 of 15 IMX70, IMY70 Series Data Sheet 70 to 90 Watt DC-DC Converters Inrush Current Input Transients Protection The inrush current has been kept as low as possible by choosing a very small input capacitance. A series resistor may be installed in the input line, in order to further reduce this current. When Vi exceeds 154 V, the converter is temporarily disabled. Furthermore, a built-in suppressor diode provides effective protection against higher input transients, which may be generated for example by short-circuits across the input lines. Table 4: Built-in transient voltage suppressor A JM028 Model 40 30 Breakdown voltage VBr nom [V] Peak power at 1 ms Pp [kW] Peak pulse current I pp [A] 56 1.5 19.4 176 0.6 2.5 24IMX70 20 40IMX70 10 110IMY70 20 0 60 s 40 t Fig. 3 Inrush current at Vi nom, Po nom versus time (110IMY70-24-248). Source impedance according to ETS 300132-2: L = 10 H, R = 1.5 . Vo trise Vo nom For very high energy transients as for example to achieve IEC/EN 61000-4-5 compliance (as per table Electromagnetic Immunity) an external inductor and capacitor are required. The components should have similar characteristics as listed in table below. Table 5: Components for external circuitry to comply with IEC/EN 61000-4-5; see table 10 04008b Model Inductor (L) Capacitor (C) -- 330 F / 100 V -- 150 F / 200 V 24IMX70 40IMX70 t tstartup 110IMY70 Fig. 4 Converter start-up and rise time JM029 L Vi+ Reverse Polarity Protection and Fuse C The built-in suppressor diode also provides for reverse polarity protection at the input by conducting current in the reverse direction. An external fuse is required to limit this current. Table 3: Recommended external fuses in the non-earthed input line Converter model Fuse type 24IMX70 single-output Littlefuse 166 10 A, 80 V 24IMX70 double-output Littlefuse 166 10 A, 80 V + Vi- Fig. 5 Example for external circuitry to comply with IEC/EN 610004-5; see table 10 Rating 40IMX70 single-output 40IMX70 double-output 110IMY70 single-output Littlefuse 372 3.15 A, 250 V 110IMY70 double-output Littlefuse 372 3.15 A, 250 V BCD.00002 Rev AH, 17-Aug-2015 MELCHER The Power Partners. Page 5 of 15 IMX70, IMY70 Series Data Sheet 70 to 90 Watt DC-DC Converters Electrical Output Data General conditions: - TA = 25 C, unless TC is specified - Shutdown pin not connected - R-pin not connected Table 6: Output data for single-output models Output 5.1 V Characteristics Vo Output voltage Io nom Output current 24IMX Conditions min typ max min typ max 5.07 5.1 5.13 11.94 12.0 12.06 7.0 40IMX 12 7.5 110IMY 12 24IMX 40IMX Vi min - Vi max 13.6 Vo Line/load regulation Vi min - Vi max, (0.1 - 1) Io nom Vo noise Output voltage noise Vi min - Vi max I o = Io nom Vo OS Output overshot at turn-on Vi min - Vi max Vo L Output overvoltage limit Min. load 1% Co ext Capacitive load td Vo 1 2 3 4 5 Dynamic load regulation Voltage deviat. Recovery time Temperature coefficient Vo /TC 13.9 2 3 Vi nom (0 0.5) Io nom or (0.1 0.6) Io nom Vi min - Vi max I o = (0.1 to 1) Io nom 6.0 V A 7.5 Vi nom, TC = 25 C Vo = 93% Vo nom 110IMY Vo d Unit Vi nom, 0.5 Io nom 12 Current limit 1 IoL 12 V 14.4 7.5 8.0 8.5 8.5 8.8 9.2 0.5 0.5 % 100 150 mVpp 50 80 0.1 0.24 7.0 13.5 V 15 unlimited unlimited F 1000 4 1800 5 mV 2 2 ms 0.02 0.02 %/K Rectangular characteristic Vo /I o BW = 20 MHz, measured with an external capacitor of 1 F across each pair of output pins. Measured with a probe according to EN 61204 With an output cap Co = 2200 F: 250 mV With an output cap Co = 1500 F: 600 mV BCD.00002 Rev AH, 17-Aug-2015 MELCHER The Power Partners. Page 6 of 15 IMX70, IMY70 Series Data Sheet 70 to 90 Watt DC-DC Converters Table 7: Output data for single- and double-output models; general condition as per table 6. Output Characteristics Vo Output voltage Io nom Output current Current limit 1 IoL Conditions min typ max min Vi nom, 0.5 Io nom 14.93 15.0 15.08 23.88 6.0 2 x 1.3 6.0 24IMX Vi nom, TC = 25 C Vo = 93% Vo nom Line/load regulation Vi min - Vi max, (0.1 - 1) Io nom Vo noise Output voltage noise Vi min - Vi max I o = Io nom Output overshot at turn-on Vo L Output overvoltage limit Co ext Admissible capacitive load Vo d Dynamic load regulation 1 2 3 4 5 6 7 24.12 40IMX Vo Vo 24.0 110IMY 40IMX td max 2 x 1.3 Vi min - Vi max Voltage deviat. Recovery time Temperature coefficient Vo /TC Unit typ 5.7 24IMX 110IMY Vo OS 2 x 24 V 15 V V A 2 x 1.3 6.2 7.0 6.6 7.5 3.0 3.15 3.3 3.0 3.15 3.3 3.0 3.15 3.3 0.5 0.5 % 2 150 200 mVpp 3 100 150 Vi min - Vi max 0.3 Min. load 1% 16.8 0.48 18 unlimited Vi nom Io nom 1/2 Io nom V 4 1500 6 7 0 F 1500 5 1500 mV 2 1 ms Vi min - Vi max I o = (0.1 to 1) Io nom 0.02 0.02 %/K The current limit is primary side controlled. In an overload condition the thermal protection may cause the converter to shut down (automatic restart on cool-down). BW = 20 MHz, measured with an external capacitor of 1 F across each output pins. Measured with a probe according to EN 61204 Both outputs of double-output models are protected by a suppressor diode. With an output cap Co = 1500 F: 750 mV Both outputs of double-output models connected in parallel. For series connection, only 1/4 of the capacitance is possible. 1000 F for 110IMY70-24-24 produced before 2012 Thermal Considerations Fig. 6a and 6b specify the admissible output power of a converter, mounted on a printed circuit board, located in free environment, exposed to an airflow with the ambient temperature TA. This applies to continuous operation in the input voltage range Vi min to Vi max; see table 2, Input data. The case temperature TC (TC Z for option Z) measured at the measuring point of case temperature (see Mechanical Data) will approach the indicated value TC max after the warm-up phase. The installer must ensure that under all operating conditions TC (TC Z) remain within the limits stated in the table Temperature specifications. Io / Io nom JM036b 1.0 1 m/s = 200 LFM 0.8 0.5 m/s = 100 LFM 0.6 natural cooling However, the reached temperature TC depends heavily on the conditions of operation, the distance and temperature of surrounding components, the orientation of the converter and the airflow, and the surfaces, thickness, and properties of the printed circuit board. Caution: The case temperature TC (TC Z for option Z), measured at the temperature measuring point (see Mechanical Data) may under no circumstances exceed the specified maximum value. BCD.00002 Rev AH, 17-Aug-2015 0.4 0.2 0 20 40 60 80 100 C TA Fig. 6a Maximum allowed output power versus ambient temperature for cased models 24IMX70-24-24-0 and 110IMY70-24-24-0 (with rev. AB or greater). MELCHER The Power Partners. Page 7 of 15 IMX70, IMY70 Series Data Sheet 70 to 90 Watt DC-DC Converters Overtemperature Protection Io / Io nom 0.4 The converter is protected against possible overheating by means of an internal temperature monitoring circuit. It shuts down the converter above the internal temperature limit and attempts to automatically restart. This feature prevents excessive internal temperature building up, which could occur under heavy overload conditions. 0.2 Short Circuit Behavior JM039b 1.0 1 m/s = 200 LFM 0.8 0.5 m/s = 100 LFM 0.6 natural cooling 0 20 40 60 80 100 C TA Fig. 6b Maximum allowed output power versus ambient temperature for 24IMX70-24-24-0Z and 110IMY70-24-24-0Z (with rev. AB or greater). The current limiting circuit decreases the output voltage, when an overcurrent occurs. It protects against a short circuit and automatically recovers after removal of the overload condition. If one output of double-output models is overloaded, the current limiting circuit decreases the output voltage of output 1 and simultaneously of the tracking output 2. Vo Vo nom Io / Io nom JM118 1.0 0.98 0.8 0.6 0.5 natural cooling 0.4 0.2 0 20 40 60 80 100 C TA Fig. 6c Io Io nom JM097 0 Fig. 7 0.5 1.0 IoL Rectangular current limitation of single-output models Max.allowed output power versus ambient temperature for converters 110IMY70-12 without opt. Z in vertical position. Vo [%] overload condition 100 Io / Io nom JM099b 1.0 switch-off 70 05041c 0.8 0.6 natural cooling 0.4 0 t Fig. 8 0.2 0 0.3 s 20 40 60 80 100 C Current limitation of double-output models with both outputs connected in parallel TA Connection in Series Fig. 6d Max. allowed output power versus ambient temperature for converters 110IMY70-12-0Z in vertical position. The outputs of all models may be connected in series without any precaution. Connection in Parallel If single-output converters are to be operated in parallel, we recommend ordering option T. Both outputs of a double-output converter can be connected in parallel without precaution and will share their currents evenly. BCD.00002 Rev AH, 17-Aug-2015 MELCHER The Power Partners. Page 8 of 15 IMX70, IMY70 Series Data Sheet 70 to 90 Watt DC-DC Converters Note: If output 2 of a double-output converter is not used, connect it parallel to output 1. Single-output converters without option T or double-output converters with the same nominal output voltage should only be operated in parallel with some precautions. The output lines to the load should have the same length and section. To improve the current repartition, small resistors should be present in the output lines. If ORing diodes are used, double Schottky diodes should be chosen to keep both diodes at the same temperature level. If single diodes are chosen, they should be mounted on the same heat sink. If the total load exceeds 150% of the nominal load of one converter, start-up problems are possible. Note: Instead of connecting two 24 V models in parallel, we recommend connecting of two 12 V models in series. [%] JM163 100 Vi = 110 V Vi = 50 V 90 80 Vi = 137 V 70 60 0 2 6 4 8 Io / Io nom Fig. 10b Efficiency versus input voltage and load. Typical values (110IMY70-05) Cross Regulation of Double-Output Models [%] See fig. 9. General conditions: - TA = 25C, unless TC is specified. - Shutdown and R pin left open-circuit. JM098 100 Vi = 50 V 90 Vo / Vo nom JM030a 1.1 Vi = 110 V 80 Vi = 137 V Vo2 1.05 70 1.0 Vo1 0.95 60 0.9 0 2 6 4 8 Io / Io nom Fig. 10c 0.85 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 Io / Io nom Efficiency versus input voltage and load. Typical values (110IMY70-12) [%] Fig. 9 JM040a 100 Cross regulation of double-output models (typ.) Vo2 versus Io2, Io1 = 0.5 Io1 nom Vi = 50 V 90 Efficiency Vi = 110 V 80 Vi = 150 V [%] JM096 100 Vi = 15 V 90 60 Vi = 24 V Vi = 33.6 V 80 0 0.2 0.4 0.6 0 0.2 0.4 0.6 0.8 Io / Io nom Fig. 10d Efficiency versus input voltage and load. Typical values (110IMY70-24-24) 70 60 70 0.8 Io / Io nom Fig. 10a Efficiency versus input voltage and load. Typical values (24IMX70-24-24) BCD.00002 Rev AH, 17-Aug-2015 MELCHER The Power Partners. Page 9 of 15 IMX70, IMY70 Series Data Sheet 70 to 90 Watt DC-DC Converters Auxiliary Functions Note: This feature allows connecting the outputs together through ORing diodes to achieve redundancy. We recommend Schottky diodes mounted onto the same heat sink (for thermal balancing). Adjustable Output Voltage As a standard feature, the converters offer adjustable output voltages by using the control input R. Fig. 10 shows the schematic diagram of the circuitry. If the control input is left open-circuit, the output voltage is set to Vo nom. Note: For output voltages Vo > Vo nom, the minimum input voltage Vi min (see Electr. Input Data) increases proportionally to Vo /Vo nom. 06029e Vi+ Vo+ Vref = 2.5 V Rext2 4 k R + Control logic Vi- The sense inputs of single-output models allow for compensating a voltage drop up to 1 V (0.6 V for models with Vo nom = 5.1 V). Synchronization (W) Double-output models can be synchronized to an external TTL signal (220 10 kHz, duty cycle 10 - 15%). Due to the higher switching frequency, the efficiency will slightly drop. Note: If this feature is not used, W (pin 6) can be connected to Vi- (pin 2) or left open-circuit. + __ Shutdown (SD) Vext Rext1 Vo- Sense Lines - Fig. 11 Output voltage control by means of the R input The R-input is referenced to the secondary side of the converter. Adjustment of Vo (or Vo1) is possible by means of either an external resistor or a voltage source. a) Adjustment by means of an external resistor Rext. Depending upon the value of the required output voltage, the resistor shall be connected: either: Between the R-pin and Vo- (or Vo1) to achieve an output voltage adjustment range of Vo 80 to 100 % of Vo nom. Single-output models can be trimmed to Vo 0 V. Vo Rext1 4 k * --------- Vo nom - Vo or: Between the R-pin and Vo+ (or Vo1+) to achieve an output voltage range of Vo 100 to 105% of Vo nom. (Vo - 2.5 V) Rext2 4 k * ---------- -------- 2.5 V * (Vo /Vo nom - 1) The outputs of the converters may be enabled or disabled by a logic signal (TTL, CMOS, etc.) applied between the shutdown pin 8 and Vi-. If the shutdown function is not required, pin 8 should be left open-circuit. Voltage on pin 8: Converter operating: Converter disabled: 2.0 to 20 V - 0.7 to +0.7 V Progr. Input Voltage Lockout PUL A special feature of these converters is the adjustable undervoltage lockout function, protecting the converter (and system) from high currents caused by operation at too low input voltage. This ensures easier start-up in distributed power systems. The undervoltage lockout level can be programmed by an external resistor R PUL (between PUL and Vi -) to increase the preset levels, as indicated in the table below (with hysteresis). The overvoltage lockout (OVL) cannot be varied. Table 8: Turn-on and shutdown voltage (pin 1 left open) b) Adjustment by means of an external voltage Vext between Vo- (or Vo1-) and the R-pin. The control voltage range is 1.96 to 2.62 V and allows for adjustment in the range of Vo 80 to 105% of Vonom. Singleoutput models can be trimmed to Vo 0 V. Vo * 2.5 V Vext -------- Vo nom Model Turn -on level Hysteresis OVL Unit 24IMX70 13.5 - 14.5 typ. 2.5 41 - 43 V 40IMX70 22 - 23.5 110IMY70 44.5 - 47.5 typ. 6 160 - 175 Table 9: Typical values for R PUL and the respective turn-on input voltage Vi LO. Note: Single-output models can be trimmed up to 110% of Vo nom. Note: Applying a higher external control voltage as needed for the max. trim range may damage the converter. 24I MX70 R PUL [k ] 40 IMX70 R PUL [k ] ViLO [V] single-op. double-op. Vi LO [V] single-op. double-op. 14 Reference Output (Ref) 16 40.5 120 The converter provides a stable 5 V (0.25 V) reference signal on pin 7 (Ref). The output is protected by a 1 k resistor. 18 19.8 62 20 12.8 41 Note: It is recommended to connect a filter capacitor (0.1 F) between Ref and Vi-, if Ref is used. 110 IMY70 Vi LO [V] 24 ] R PUL [k R PUL [k ] single-output double-output Current Sharing (T) 46 This feature is available for single-output models. Several parallel connected converters will share their current evenly by interconnecting the T pins (pin 11). 50 68 270 57 25.5 110 61 18 82 BCD.00002 Rev AH, 17-Aug-2015 MELCHER The Power Partners. Page 10 of 15 IMX70, IMY70 Series Data Sheet 70 to 90 Watt DC-DC Converters Electromagnetic Compatibility (EMC) A suppressor diode together with an input filter form an effective protection against high input transient voltages which typically occur in many installations, but especially in batterydriven mobile applications. Electromagnetic Immunity Table 10: Immunity type tests Phenomenon Standard Electrostatic discharge to case IEC/EN 61000-4-2 Electromagnetic field Class Level Electrical fast transients/burst Value applied Waveform Source imped. Test procedure contact discharge (R pin open) 6000 Vp 1/50 ns 330 3 air discharge (R pin open) 8000 Vp 10 positive and 10 negative discharges x4 antenna 20 V/m 80% AM, 1 kHz n.a. 80 - 1000 MHz yes A 5 antenna 20 V/m 80% AM, 1 kHz n.a. 800 - 1000 MHz yes A 3 IEC/EN 61000-4-3 36 IEC/EN 61000 -4- 4: 2004 4 3 Surges IEC/EN 61000-4-5 Conducted disturbances 1 IEC/EN 61000-4-6 In Perf- 2 oper. crit. Coupling mode 1 direct coupl. (fig. 9) +i/c, -i/c,+i/-i capacit. (fig. 10), o/c 10 V/m 1400 - 2100 MHz 5 V/m 2100 - 2500 MHz 2000 Vp6 bursts of 5/50 ns 5 kHz over 15 ms 4000 Vp burst period: 300 2000 Vp ms 50 12 37 +i/c, -i/c 2000 Vp 27 +i/-i 1000 Vp3 38 i, o, signal wires 10 VAC (140 dBV) 3 1.2/50 s AM 80% 1 kHz 60 s positive 60 s negative transients per coupling mode yes B yes A yes B yes B yes B 2 5 pos. and 5 neg. surges per coupling mode 150 0.15 - 80 MHz yes A i = input, o = output, c = case (not for option Z) A = normal operation, no deviation from specification, B = temporary deviation from specs. possible. Corresponds to EN 50121-3-2:2006, table 9.3 Corresponds to EN 50121-3-2:2006 table 9.1 and exceeds EN 50121-4:2006 table 1.1. Corresponds to EN 50121-3-2:2006 table 9.2 and EN 50121-4:2006 table 1.2 (compliance with digital mobile phones). Corresponds to EN 50121-3-2:2006 table 7.2 and EN 50121-4:2006 table 2.2. Measured with an external input capacitor specified in table 5 Corresponds to EN 50121-3-2:2006 table 7.1 and EN 50121-4:2006 table 2.2. 2 3 4 5 6 7 8 Electromagnetic Emissions dbV The EMC requirements must be observed at the end product system level. However, we test the converters to EMC standards. An effective integrated input filter significantly reduces the reflected input current and improves EMC features. Further improvements are possible by adding simple external filters. JM037 80 EN 55022 A qp EN 55022 A avr 60 40 20 0 0.2 0.5 1 2 5 10 20 MHz Fig. 12 Typical disturbance voltage at the input (green = peak, x = quasi-peak, pink = average) according to EN 55011/ 22, measured at Vi nom and Io nom. Output leads = 0.1 m, twisted (110IMY70-24-24). BCD.00002 Rev AH, 17-Aug-2015 MELCHER The Power Partners. Page 11 of 15 IMX70, IMY70 Series Data Sheet 70 to 90 Watt DC-DC Converters Immunity to Environmental Conditions Table 11: Mechanical and climatic stress Test method Standard Test conditions Status Cb Damp heat steady state IEC/EN 60068-2-56 Temperature: Relative humidity: Duration: 25 C 95 % 8h Converter operating Cab 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 Db Damp heat test, cyclic EN 50155:2007, clause 12.2.5 IEC/EN 60068-2-30 Temperature: Cycles (respiration effect): Duration: 55 C and 25 C 2 2x 24 h Converter not operating Bd Dry heat test steady state EN 50155:2007, clause 12.2.4 IEC/EN 60068-2-2 Temperature: Duration: 70 C 6h Converter operating Ad Cooling test steady state EN 50155:2007, clause 12.2.3 IEC/EN 60068-2-1 Temperature, duration Performance test -40 C, 2 h +25 C Conv. not operating -- Salt mist test sodium chloride (NaCl) solution 2 EN 50155:2007 clause 12.2.10 class ST2 2 Temperature: Duration: 35 2 C 16 h Converter not operating Fc Vibration (sinusoidal) IEC/EN 60068-2-6 MIL-STD-810D section 514.3 Acceleration amplitude: Converter operating Frequency (1 Oct/min): Test duration: 0.35 mm (10 - 60 Hz) 5 g n = 49 m/s2 (60 - 2000 Hz) 10 - 2000 Hz 7.5 h (2.5 h in each axis) Fh Random vibration broad-band (digital control) and guidance IEC/EN 60068-2-64 Acceleration spectral density: Frequency band: Acceleration magnitude: Test duration: 0.05 g n2/Hz 8 - 500 Hz 4.9 g rms 1.5 h (0.5 h in each axis) Converter operating Eb Bump (half-sinusoidal) IEC/EN 60068-2-29 MIL-STD-810D section 516.3 Acceleration amplitude: Bump duration: Number of bumps: 25 gn = 245 m/s2 6 ms 6000 (1000 in each direction) Converter operating Ea Shock (half-sinusoidal) IEC/EN 60068-2-27 MIL-STD-810D section 516.3 Acceleration amplitude: Bump duration: Number of bumps: 50 gn = 490 m/s2 11 ms 18 (3 in each direction) Converter operating -- Shock EN 50155:2007 clause 12.2.11, EN 61373 sect. 10, class B, body mounted 1 Acceleration amplitude: Bump duration: Number of bumps: 5.1 gn 30 ms 18 (3 in each direction) Converter operating -- Simulated long life testing at increased random vibration levels EN 50155:2007 clause 12.2.11, EN 61373 sect. 8 and 9, class B, body mounted 1 Acceleration spectral density: Frequency band: Acceleration magnitude: Test duration: 0.02 g n2 / Hz 5 - 150 Hz 0.8 g n r ms 15 h (5 h in each axis) Converter operating 1 2 Body mounted = chassis of a railway coach Models with option Z have been covered by lacquer (Peters SL1301) to simulate the end-use situation. BCD.00002 Rev AH, 17-Aug-2015 MELCHER The Power Partners. Page 12 of 15 IMX70, IMY70 Series Data Sheet 70 to 90 Watt DC-DC Converters Temperatures Table 12: Temperature specifications, valid for air pressure of 800 to 1200 hPa (800 to 1200 mbar) Temperature -0 Unit Characteristics Conditions min max TA TC Ambient temperature Case temperature (without opt. Z) 2 In operation 1 -40 -40 100 1 105 2 TC Z Component temp. with opt. Z 2 -40 115 2 TS Storage temperature - 55 105 1 Not operational C See Thermal Considerations Temperature measurement point; see Mechanical Data 2 Reliability Table 13: Calculated MTBF at nominal load Model Ground benign 40 C 24IMX70-24-24 (Bellcore Telc. SR-332) Ground fixed 40 C 70 C 1 Ground mobile 50 C 1 022 000 510 000 110IMY70-05 (Bellcore Telc. SR-332) 720 000 360 000 98 000 98 000 110IMY70-12 (Bellcore Telc. SR-332) 825 000 413 000 182 000 106 000 1 000 000 632 000 163 000 117 400 110IMY70-24-24 (Bellcore Telc. SR-332) 1 162 500 Device hours Unit 118 500 h with an air flow of 0.5 m/s Mechanical Data Dimensions in mm. Tolerances 0.3 mm, unless noted. European Projection 4 threads M3 JM032a 1 47.8 Bottom view TC Z 0.8 x 0.8 5.08 56.9 TC 63.5 0.8 x 0.8 5.08 1 JM031 Bottom view 19 19 63.5 63.5 72.8 69.6 76.2 Fig. 13 Case IMX70/IMY70 (without opt. Z) Material Zinc Core Components <9.75 Core 8.9 5.3 TC Z 12.5 3.66 TC Fig. 14 IMX70/IMY70 open frame (option Z) Weight: approx. 70 g Weight: approx. 140 g BCD.00002 Rev AH, 17-Aug-2015 MELCHER The Power Partners. Page 13 of 15 IMX70, IMY70 Series Data Sheet 70 to 90 Watt DC-DC Converters Safety and Installation Instructions Ensure that a converter failure (e.g. by an internal short-circuit) does not result in a hazardous condition. Pin allocation earthed copper area Table 14: Pin allocation Pin no. Single-output Double-output 1 PUL PUL 2 Vi- Vi- 3 1 2 JM043 n.c. / Vi- 1 n.c. / case PCB Vi- 1 4 Vi+ Vi+ 5 n.c. / Vi+ 1 n.c. / Vi+ 1 6 W (Sync.) W (Sync.) 7 Ref Ref 8 SD / i 2 SD / i 2 11 T n.c. 12 n.c. n.c. 13 S+ Vo2+ 14 Vo - Vo2- 15 Vo - Vo1- 16 Vo+ Vo1+ 17 Vo+ n.c. 18 S- n.c. 19 R (adjust) R (adjust) Fig. 16 screw M3 lock washer Reliable connection of the metallic case to protection earth (110IMY70 models). Use at least 2 screws ! Standards and Approvals The converters are safety agency approved to the standards IEC/EN 60950 and UL/CSA 60950-1 2 nd Edition. The converters have been evaluated for: * Building-in * Basic insulation input to output for 24IMX70 and 40IMX70 models, based on the maximum input voltage; * Reinforced insulation input to output for 110IMY70 models, basic insulation to the case, based on the input voltage of 150 V. The case can be reliably connected to PE (protective earth) - except option Z; see fig. 15. * Pollution degree 2 * Connecting the input to a secondary circuit, which is subject to a maximum transient rating of 1500 V. The converters are subject to manufacturing surveillance in accordance with the above mentioned standards. Only connected at 24IMX models, n.c. for 40IMX and 110IMY i if option i (inhibit) is fitted CB scheme is available. 09122b 1 2 3 4 5 6 7 8 Bottom view Fig. 15 Input Fuse 11 12 13 14 15 16 17 18 19 To prevent excessive current flowing through the input supply lines in case of a short-circuit in the converter, an external fuse should be installed in the non-earthed input line; see table 3. Railway Applications To comply with Railway standards, all components are coated with a protective lacquer (except option Z). Protection Degree and Cleaning Liquids 4 treads M3 The protection degree is IP 40 (except option Z). Footprint. The holes in the PCB should have a diameter of 1.5 mm. In order to avoid possible damage, any penetration of cleaning fluids should be prevented, since the converters are not hermetically sealed. Installation Instructions Installation of the 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 with hole diameters of 1.5 mm for the pins. Connect both input pins for 24IMX70 models. The converters should be connected to a secondary circuit. BCD.00002 Rev AH, 17-Aug-2015 However, open-frame models (option Z) leave the factory unlacquered; they can be lacquered by the customer, for instance together with the mother board. Cleaning liquids are not permitted - except washing at room temperature with isopropyl alcohol and de-ionized/destilled water (1 : 1) . The mother board can also be cleaned, before fitting the openframe converter. Note: Other cleaning liquids can damage the adhesive joints of the ferrite cores. MELCHER The Power Partners. Page 14 of 15 IMX70, IMY70 Series Data Sheet 70 to 90 Watt DC-DC Converters Isolation The electric strength test is performed in the factory as a routine test in accordance with EN 50116, IEC/EN 60950-1, and UL/CSA 60950-1. The Company will not honor any warranty claims resulting from incorrectly executed electric strength field tests. Table 15: Electric strength test voltages Characteristic Input to (outputs+case) 20/40I MX70 1 Factory test >1 s 1.5 2 Input to (outputs+case) 110I MY70 1 3 Outputs to case all models 1 Between outputs all models 0.5 0.15 3 kVAC kVDC M Equivalent DC voltage 2.1 4.2 0.7 0.21 3 Insulation resistance at 500 VDC >100 >100 - - 1 2 3 Unit For open-frame models (option Z), only the insulation input to outputs is tested. 1.5 kVAC according to IEC 60950, sect. 6.2, Telecom equipment; type test with 1.5 kVAC / 60 s (IEE 802.3). The test voltage between outputs is not applied as routine test. Options Option i: Inhibit (Negative Shutdown Logic) The output of the converter may be enabled or disabled by means of a logic signal (TTL, CMOS, etc.) applied to the inhibit pin 8. No output voltage overshoot will occur, when the converter is turned on. If the inhibit function is not required the inhibit pin 8 should be connected to Vi- to enable the output (active low logic, fail safe). Voltage on pin 8: Converter operating: -10 V to +0.8 V Converter disabled: 2.4 V to 20 V 06138a Option Z 4 Vi+ 8 i 2 Vi - Fig. 17 If the converters are mounted onto a mother board, in many cases, a converter case is not required. Only converters with option Z are not varnished, and this allows dipping of the populated board including the converter into a protection lacquer. Note: The converters shall not be exposed to cleaning processes, as this will damage the glue of the ferrite cores. If the inhibit function is not used, the inhibit pin should be connected to Vi-. NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not designed, intended for use in, or authorized for use as critical components in life support systems, equipment used in hazardous environments, or nuclear control systems without the express written consent of the respective divisional president of Power-One, Inc. 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. BCD.00002 Rev AH, 17-Aug-2015 MELCHER The Power Partners. Page 15 of 15