110IMY70-05-0TG

IMX70 BEL | Alldatasheet

Document overview

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Technical content

Features

• RoHS-compliant for all six substances
• 5 year warranty
• Extremely wide input voltage ranges up to 154 VDC
• 1 or 2 isolated outputs up to 48 V
• Basic insulation: IMX models
• Class I equipment with reinforced insulation: IMY models
• 1500 to 3000 VAC i/o electric strength test voltage
• 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
• Thermal protection
• Planar technology for best stability
• Metal case (12.5 mm high) or open frame with 9.75 mm profile Safety-approved to the latest edition of IEC/EN 60950-1 and UL/CSA 60950-1. CE mark for 110IMY70. Table of Contents Page Page 76.2 63.5 2.5" 12.5 0.49" 72.7 2.86" 47.8 1.88" 9.75 0.38" 1 110IMY70

tech.support@psbel.com belfuse.com/power-solutions BCD.00002 Rev AJ, 28-May-2018 Page 2 of 17 IMX70 / IMY70 Series 70 to 90 Watt DC-DC Converters © 2018 Bel Power Solutions & Protection

Description

The converters are designed according to the international safety standards IEC/EN/UL 60950-1 2 nd Edition. The 24IMX70 converters exhibit basic insulation for the specified input voltage, whereas the 110IMY70 converters 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 en vironments, 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. Model Selection Table 1: Model Selection Output 1 Output 2 Input voltage Efficiency η 1 Model Options Vo nom [V] Io nom [A] Vo nom [V] Io nom [A] Vi min [V] Vi cont [V] Vi max [V] min [%] typ [%] 5.1 12 - - 43.2 50 to 137.5 154 89.5 91 110IMY70-05-0TG i, Z 7.0 7.5 43.2 15 to 33.6 50 to 137.5 40.1 154 24IMX70-12-0TG 110IMY70-12-0TG i, Z 5.7 6.0 43.2 15 to 33.6 50 to 137.5 40.1 154 24IMX70-15-0TG 110IMY70-15-0TG i, Z 1.3 1.3 1.3 1.3 43.2 15 to 33.6 50 to 137.5 40.1 154 24IMX70-24-24-0G 110IMY70-24-24-0G i, Z

1 Efficiency at TA = 25 °C, Vo nom, Io nom

2 Short time; see table 2 for details

Operating ambient temperature range Options: Feature:

110 IMY70 - 24 - 24 0 i Z G

1 Standard feature for single-output models, not available for dual-output models

2 G is standard and is placed at the end of the part number

Note: The sequence of options 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.

tech.support@psbel.com belfuse.com/power-solutions BCD.00002 Rev AJ, 28-May-2018 Page 3 of 17 IMX70 / IMY70 Series 70 to 90 Watt DC-DC Converters © 2018 Bel Power Solutions & Protection 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. 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. 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. An incorporated protection disables the converter in an overtemperature condition. The converter automatically recovers, after the temperature has dropped below the limit. 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. Vi– Vi+ Primary control circuit Isolation Vo– Input filter JM027c Ref R Opt. i 81 86 PUL n.c.1 n.c.1 T Vi+ 2 Vi– 2 Synchr. rect. drive

1 Not connected 2 Connected for 24IMX models only

1 kΩ Fig. 1 Block diagram of single-output models Secondary control circuit Primary control circuit Isolation Cy Vo2+ Vo2– Vo1+ Vo1– Input filter JM026c Ref R Opt. i 81 86 PUL W Cy 11 n.c.1 n.c.1 n.c.1 n.c.1 1 Not connected 2 Connected for 24IMX models only Vi– Vi+ Vi+ 2 Vi– 2 3 SD PTC 1 kΩ Fig. 2 Block diagram of double-output models

tech.support@psbel.com belfuse.com/power-solutions BCD.00002 Rev AJ, 28-May-2018 Page 4 of 17 IMX70 / IMY70 Series 70 to 90 Watt DC-DC Converters © 2018 Bel Power Solutions & Protection Electrical Input Data General conditions: - TA = 25 °C, shutdown and R pin left open-circuit, unless specified. Table 2: Input data Model 24IMX70 110IMY70 Unit Characteristics Conditions min typ max min typ max Vi Operating input voltage TA min to TA max, Io = 0 – Io nom 15 1 33.6 50 137.5 VDC Vi nom Nominal input voltage 24 (72, 96), 110 Vi 2s Temporary input voltage For 2 s, no shutdown 12 1 40.1 43.2 1 154 Vi sur Repetitive surge voltage Shutdown, no damage 50 168 tstart-up Converter start-up time Switch on Worst case condition at Vi min and full load 500 250 500 msSD high 500 500 trise Rise time Vi = 0 → Vi nom, Io nom 25 25 Ii o No-load input current Io = 0, Vi min – Vi max 200 25 50 mA Iirr Reflected ripple current Io = 0 – Io nom 30 200 mApp Iinr p Inrush peak current Vi = Vi max 25 35 A Ci Input capacitance For surge calculation 24 7.7 µF VSD Shutdown voltage Converter disabled – 0.7 to +0.7 – 0.7 to +0.7 V Converter operating 2 to 20 (or open-circuit) 2 to 20 (or open-circuit) I SD Shutdown pin current – 0.2 – 0.2 mA Ii SD Input current at shutdown Vi min – Vi max 2 2 fs Switching frequency Vi min – Vi max, Io = 0 – Io nom 200 2 210 2 200 2 210 2 kHz 1 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. 2 Typ. 240 kHz for single-output models, typ. 300 kHz for models with 5 V output Inrush Current 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. t JM028 0 20 40 60 µs A Vo nom Vo tstartup trise t 04008b Fig. 3 Inrush current at Vi nom, Po nom versus time (110IMY70-24-24-8). Source impedance according to ETS 300132-2: L = 10 μH, R = 1.5 Ω. Fig. 4 Converter start-up and rise time

tech.support@psbel.com belfuse.com/power-solutions BCD.00002 Rev AJ, 28-May-2018 Page 5 of 17 IMX70 / IMY70 Series 70 to 90 Watt DC-DC Converters © 2018 Bel Power Solutions & Protection Reverse Polarity Protection and Fuse 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 Rating 24IMX70 single-output Littlefuse 166 10 A, 80 V 24IMX70 double-output Littlefuse 166 10 A, 80 V 110IMY70 single-output Littlefuse 372 3.15 A, 250 V 110IMY70 double-output Littlefuse 372 3.15 A, 250 V Input Transients Protection 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 Model Breakdown voltage VBr nom [V] Peak power at 1 ms Pp [kW] Peak pulse current Ipp [A] 24IMX70 56 1.5 19.4 110IMY70 176 0.6 2.5 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 Model Inductor (L) Capacitor (C) 24IMX70 --- 330 μF / 100 V 110IMY70 --- 150 μF / 200 V Vi+ Vi– C L JM029 Fig. 5 Example for external circuitry to comply with IEC/EN 61000-4-5; see table 10

tech.support@psbel.com belfuse.com/power-solutions BCD.00002 Rev AJ, 28-May-2018 Page 6 of 17 IMX70 / IMY70 Series 70 to 90 Watt DC-DC Converters © 2018 Bel Power Solutions & Protection 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 12 V Unit Characteristics Conditions min typ max min typ max Io nom Output current 24IMX Vi min – Vi max 7.0 A 110IMY 12 7.5 Io L Current limit 1 24IMX Vi nom, TC = 25 °C Vo = 93% Vo nom 7.5 8.0 8.5 ΔVo Line / load regulation Vi min – Vi max (0.1 – 1) Io nom ±0.5 ±0.5 % Vnoise Output voltage noise Vi min – Vi max Io = Io nom 2 100 150 mVpp3 50 80 Vo OS Output overshot at turn-on Vi min – Vi max 0.1 0.24 V Vo L Output overvoltage limit Min. load 1% 6.0 7.0 13.5 15 Co ext Capacitive load unlimited unlimited μF Vo d Dynamic load regulation Voltage deviation Vi nom, (0 ↔ 0.5) Io nom or (0.1 ↔ 0.6) Io nom ±1000 4 ±1800 5 mV t d Recovery time 2 2 ms a Vo Temperature coefficient ΔVo / ΔTC Vi min – Vi max Io = (0.1 to 1) Io nom ±0.02 ±0.02 %/K

1 Rectangular characteristic Vo/Io

2 BW = 20 MHz, measured with an external capacitor of 1 µF across each pair of output pins.

3 Measured with a probe according to EN 61204

4 With an output cap Co = 2200 µF: ±250 mV

5 With an output cap Co = 1500 µF: ±600 mV

tech.support@psbel.com belfuse.com/power-solutions BCD.00002 Rev AJ, 28-May-2018 Page 7 of 17 IMX70 / IMY70 Series 70 to 90 Watt DC-DC Converters © 2018 Bel Power Solutions & Protection Table 7: Output data for single- and double-output models; general condition as per table 6. Output 15 V 2 x 24 V Unit Characteristics Conditions min typ max min typ max Io nom Output current 24IMX Vi min – Vi max 5.7 2 x 1.3 A 110IMY 6.0 2 x 1.3 Io L Current limit 1 24IMX Vi nom, TC = 25 °C Vo = 93% Vo nom ΔVo Line / load regulation Vi min – Vi max (0.1 – 1) Io nom ±0.5 ±0.5 % Vnoise Output voltage noise Vi min – Vi max Io = Io nom 2 150 200 mVpp3 100 150 Vo OS Output overshot at turn-on Vi min – Vi max 0.3 0.48 V Vo L Output overvoltage limit Min. load 1% 16.8 18 4 Co ext Capacitive load unlimited 0 1500 6, 7 μF Vo d Dynamic load regulation Voltage deviation Vi nom, (0 ↔ 0.5) Io nom or (0.1 ↔ 0.6) Io nom ±1500 5 ±1500 mV t d Recovery time 2 2 ms a Vo Temperature coefficient ΔVo / ΔTC Vi min – Vi max Io = (0.1 to 1) Io nom ±0.02 ±0.02 %/K 1 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). 2 BW = 20 MHz, measured with an external capacitor of 1 µF across each output pins. 4 Both outputs of double-output models are protected by a suppressor diode.

5 With an output cap Co = 1500 µF: ±750 mV

6 Both outputs of double-output models connected in parallel. For series connection, only 1/4 of the capacitance is possible. 7 1000 µF 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. 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. The installer must ensure that under all operating conditions TC (TC Z) remain within the limits stated in the table Temperature specifications. 1.0 0.8 0.6 0.4 0.2 20 40 60 80 100 °C Io / Io nom JM036b TA natural cooling 1 m/s = 200 LFM 0.5 m/s = 100 LFM 1.0 0.8 0.6 0.4 0.2 20 40 60 80 100 °C Io / Io nom JM039b TA natural cooling 1 m/s = 200 LFM 0.5 m/s = 100 LFM 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). Fig. 6b Maximum allowed output power versus ambient temperature for 24IMX70-24-24-0Z and 110IMY70-24-24-0Z (with rev. AB or greater).

tech.support@psbel.com belfuse.com/power-solutions BCD.00002 Rev AJ, 28-May-2018 Page 8 of 17 IMX70 / IMY70 Series 70 to 90 Watt DC-DC Converters © 2018 Bel Power Solutions & Protection 1.0 0.8 0.6 0.4 0.2 20 40 60 80 100 °C Io / Io nom JM118 TA natural cooling 1.0 0.8 0.6 0.4 0.2 20 40 60 80 100 °C Io / Io nom JM099b TA natural cooling Fig. 6c Max. allowed output power versus ambient tem perature for converters 110IMY70-12 without opt. Z in vertical position. Fig. 6d Max. allowed output power versus ambient temperature for converters 110IMY70-12-0Z in vertical position. Overtemperature Protection The converter is protected against possible over heating by means of an internal temperature monitoring circuit. It shuts down the converter above the internal temperature limit and attempts to auto matically restart. This feature prevents excessive internal temperature building up, which could occur under heavy overload conditions. Short Circuit Behavior 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 0.98 0.5 0.5 1.0 IoL Io Io nom JM097 100 Vo [%] t 05041c 0.3 s overload condition switch-off Fig. 7 Rectangular current limitation of single-output models Fig. 8 Current limitation of double-output models with both outputs connected in parallel Connection in Series and in Parallel The outputs of all models may be connected in series without any precaution. If single-output converters are operated in parallel, we re com mend ordering option T. Both outputs of a double-output converter can be connected in parallel without precaution and will share their currents evenly. Note: If output 2 of a double-output converter is not used, connect it in parallel with 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.

tech.support@psbel.com belfuse.com/power-solutions BCD.00002 Rev AJ, 28-May-2018 Page 9 of 17 IMX70 / IMY70 Series 70 to 90 Watt DC-DC Converters © 2018 Bel Power Solutions & Protection Cross Regulation of Double-Output Models See fig. 9. General conditions: – TA = 25°C, unless TC is specified. – Shutdown and R pin left open-circuit. Efficiency 0.85 0.9 0.95 1.0 1.05 1.1 Vo / Vo nom JM030a Vo2 Vo1 Fig. 9 Cross regulation of double-output models (typ.) Vo2 versus Io2, Io1 = 0.5 Io1 nom 0.4 0.8 Io / Io nom0 JM096 Vi = 24 V 100 η [%] 0.60.2 Vi = 33.6 V Vi = 15 V 4 80 JM163 100 η [%] Vi = 137 V Vi = 50 V Io / Io nom Vi = 110 V Fig. 10a Efficiency versus input voltage and load. Typical values (24IMX70-24-24) Fig. 10b Efficiency versus input voltage and load. Typical values (110IMY70-05) 4 80 JM098 Vi = 110 V 100 η [%] Vi = 137 V Vi = 50 V Io / Io nom 0.4 0.8 Io / Io nom0 JM040a Vi = 110 V 100 η [%] 0.60.2 Vi = 150 V Vi = 50 V Fig. 10c Efficiency versus input voltage and load. Typical values (110IMY70-12) Fig. 10d Efficiency versus input voltage and load. Typical values (110IMY70-24-24)

tech.support@psbel.com belfuse.com/power-solutions BCD.00002 Rev AJ, 28-May-2018 Page 10 of 17 IMX70 / IMY70 Series 70 to 90 Watt DC-DC Converters © 2018 Bel Power Solutions & Protection Auxiliary Functions Adjustable Output Voltage As a standard feature, the converters offer adjustable output voltages by using the control input R. Fig. 11 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. R Vo+ Vo– Vext 4 kΩVref = 2.5 V Control logic Rext1 Rext2 06029e Vi– Vi+ 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 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)

2.5 V • (Vo/Vo nom – 1)

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 Vo nom. Single-output models can be trimmed to Vo ≈ 0 V. Vo • 2.5 V Vo nom 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. Reference Output (Ref) The converter provides a stable 5 V (±0.25 V) reference signal on pin 7 (Ref). The output is protected by a 1 kΩ resistor. Note: It is recommended to connect a filter capacitor (0.1 µF) between Ref and Vi–, if Ref is used. Current Sharing (T) This feature is available for single-output models. Several parallel connected converters will share their current evenly by interconnecting the T pins (pin 11). 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).

tech.support@psbel.com belfuse.com/power-solutions BCD.00002 Rev AJ, 28-May-2018 Page 11 of 17 IMX70 / IMY70 Series 70 to 90 Watt DC-DC Converters © 2018 Bel Power Solutions & Protection Sense Lines The sense inputs of single-output models allow for compen sat ing 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 (S D 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: 2.0 to 20 V Converter disabled: –0.7 to +0.7 V Progr. Input Voltage Lockout PUL A special feature of these converters is the adjustable under voltage lockout function, protecting the converter (and system) from high currents caused by operation at too low input volt age. This ensures easier start-up in distributed power systems. The undervoltage lockout level can be programmed by an external resistor RPUL (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) Model Turn-on level Hysteresis OVL Unit 24IMX70 3.5 – 14.5 typ. 2.5 41 – 43 V 110IMY70 44.5 – 47.5 typ. 6 160 – 175 Table 9: Typical values for RPUL and the respective turn-on input voltage Vi LO. 24IMX70 R PUL [kΩ] 110IMY70 R PUL [kΩ] Vi LO [V] single-output double-output Vi LO [V] single-output double-output 14 ∞ ∞ 46 ∞ ∞ 16 40.5 120 50 68 270 18 60 62 57 25.5 110 20 65 41 61 18 82

tech.support@psbel.com belfuse.com/power-solutions BCD.00002 Rev AJ, 28-May-2018 Page 12 of 17 IMX70 / IMY70 Series 70 to 90 Watt DC-DC Converters © 2018 Bel Power Solutions & Protection 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 battery-driven mobile applications. Electromagnetic Immunity Table 10: Electromagnetic immunity (type tests) Phenomenon Standard Level Coupling mode 1 Value applied Waveform Source imped. Test procedure In oper. Perf. crit.2 Electrostatic discharge (to case) IEC/EN 61000-4-2 3 contact discharge (R pin open) ±6000 Vp 1/50 ns 330 Ω 150 pF 10 pos. & 10 neg. discharges yes B 3 air discharge (R pin open) ±8000 Vp Electromagnetic field IEC/EN 61000-4-3 x 4 antenna 20 V/m AM 80% / 1 kHz N/A 80 – 1000 MHz yes A 5 antenna

20 V/m

AM 80% / 1 kHz N/A 800 – 1000 MHz yes A10 V/m 1400 – 2100 MHz

5 V/m 2100 – 2500 MHz

+i/c, –i/c, +i/–i ±2000 Vp bursts of 5/50 ns; 5 kHz over 15 ms; burst period: 300 ms 50 Ω 60 s positive 60 s negative transients per coupling mode yes A 4 ±4000 Vp yes B yes B3 capacit. coupl. o/c ±2000 Vp Surges IEC/EN 61000-4-5 3 7 +i/c, –i/c ±2000 Vp 1.2 / 50 µs 12 Ω/ 9 μF 5 pos. & 5 neg. surges per coupling mode yes B 2 7 +i/–i ±1000 Vp 2 Ω/ 18 μF Conducted disturbances IEC/EN 61000-4-6 3 8 i, o, signal wires 10 VAC (140 dBµV) AM 80% / 1 kHz 150 Ω 0.15 – 80 MHz yes A 1 i = input, o = output, c = case (not for option Z) 2 A = normal operation, no deviation from specification, B = temporary deviation from specs. possible. 3 Corresponds to EN 50121-3-2:2016 table 5.3 and EN 50121-4:2016 table 2.4. 4 Corresponds to EN 50121-3-2:2016 table 5.1 and exceeds EN 50121-4:2016 table 2.1. 5 Corresponds to EN 50121-3-2:2016 table 5.2 and EN 50121-4:2016 table 2.2. 6 Corresponds to EN 50121-3-2:2016 table 3.2 and EN 50121-4:2016 table 4.2. 7 Measured with an external input capacitor specified in table 5. Exceeds EN 50121-3-2:2016 table 3.3 and EN 50121-4:2016 table 4.3. 8 Corresponds to EN 50121-3-2:2016 table 3.1 and EN 50121-4:2016 table 4.1. Electromagnetic Emissions 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 ex ternal filters. dbµV 0.2 0.5 1 2 5 10 20 MHz EN 55022 A qp JM251 EN 55022 A avr Fig. 12 Typical disturbance voltage at the input (green = peak, x = quasi-peak, pink = average) according to EN 55011, measured at Vi nom and Io nom. Output leads = 0.1 m, twisted (110IMY70-24-24).

tech.support@psbel.com belfuse.com/power-solutions BCD.00002 Rev AJ, 28-May-2018 Page 13 of 17 IMX70 / IMY70 Series 70 to 90 Watt DC-DC Converters © 2018 Bel Power Solutions & Protection Immunity to Environmental Conditions Table 11: Mechanical and climatic stress Test method Standard Test Conditions Status Cab Damp heat steady state IEC/EN 60068-2-78 MIL-STD-810D section 507.2 Temperature: 40 ±2 °C Converter not operatingRelative humidity: 93 +2/-3 % Duration: 56 days Db Damp heat test, cyclic EN 50155:2007, clause 12.2.5 IEC/EN 60068-2-30 Temperature: 55 °C and 25 °C Converter not operatingCycles (respiration effect): 2 Duration: 2 x 24 h Bd Dry heat test steady state EN 50155:2007, clause 12.2.4 IEC/EN 60068-2-2 Temperature: 70 °C Converter operating Duration: 6 h Ad Cooling test steady state EN 50155:2007, clause 12.2.3 IEC/EN 60068-2-1 Temperature, duration: -40 °C, 2 h Converter not operatingPerformance test: +25 °C Ka Salt mist test sodium chloride (NaCl) solution 2 EN 50155:2007, clause 12.2.10 IEC/EN 60068-2-11 class ST2 Temperature: 35 ±2 °C Converter not operatingDuration: 16 h Fc Vibration (sinusoidal) IEC/EN 60068-2-6 MIL-STD-810D section 514.3 Acceleration amplitude: 0.35 mm (10 – 60 Hz) 5 gn = 49 m/s2 (60 - 2000 Hz) Converter operating Frequency (1 Oct/min): 10 – 2000 Hz Test duration: 7.5 h (2.5 h in each axis) Fh Random vibration broad band (digital control) & guidance IEC/EN 60068-2-64 Acceleration spectral density: 0.05 gn 2/Hz Converter operating Frequency band: 8 – 500 Hz Acceleration magnitude: 4.9 gn rms Test duration: 1.5 h (5 h in each axis) Ea Shock (half-sinusoidal) IEC/EN 60068-2-27 MIL-STD-810D section 516.3 Acceleration amplitude: 50 gn = 490 m/s2 Converter operating Bump duration: 11 ms Number of bumps: 18 (3 in each direction) --- Shock EN 50155:2007, clause 12.2.11 EN 61373 sect. 10 class B, body mounted 1 Acceleration amplitude: 5.1 gn Converter operating Bump duration: 30 ms Number of bumps: 18 (3 in each direction) --- 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: 0.02 gn 2/Hz Converter operating Frequency band: 5 – 150 Hz Acceleration magnitude: 0.8 gn rms Test duration: 15 h (5 h in each axis)

1 Body mounted = chassis of a railway coach

2 Models with option Z have been covered by lacquer (AVR80 or Peters SL1301) in order to simulate the end-use situation. Temperatures Table 8: Temperature specifications, valid for an air pressure of 800 – 1200 hPa (800 – 1200 mbar) Model -0 Unit Characteristics Conditions min typ max TA Ambient temperature In operation 1 - 40 100 1 TC Case temperature (without opt. Z) 2 - 40 105 2 TC Z Component temperature with opt. Z 2 - 40 115 2 TS Storage temperature Not operational - 55 85

1 See Thermal Considerations

2 Temperature measurement point; see Mechanical Data

tech.support@psbel.com belfuse.com/power-solutions BCD.00002 Rev AJ, 28-May-2018 Page 14 of 17 IMX70 / IMY70 Series 70 to 90 Watt DC-DC Converters © 2018 Bel Power Solutions & Protection Reliability Table 13: Calculated MTBF at nominal load Model Ground benign Ground fixed Ground mobile Device hours Unit 40 °C 40 °C 70 °C 50 °C 24IMX70-24-24 (Bellcore Telc. SR-332) 1 022 000 510 000 162 500 118 500 h 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 110IMY70-24-24 (Bellcore Telc. SR-332) 1 000 000 632 000 163 000 117 400 1 with an air flow of 0.5 m/s Mechanical Data Dimensions are in mm. Tolerances ±0.3 mm (unless noted). 63.5 76.2 63.5 0.8 x 0.8 5.08 12.5 JM032a 69.6 56.9 4 threads M3 TC Bottom view TC ≥3.66 European Projection 5.08 47.8 63.5 72.8 8.9 0.8 x 0.8 JM031 Tc Cores Tc Bottom view Components 5.6 <9.75 Fig. 13 Case IMX70/IMY70 (without opt. Z) Material Zinc; weight: approx. 140 g Fig. 14 IMX70/IMY70 open frame (option Z) Weight: approx. 70 g

tech.support@psbel.com belfuse.com/power-solutions BCD.00002 Rev AJ, 28-May-2018 Page 15 of 17 IMX70 / IMY70 Series 70 to 90 Watt DC-DC Converters © 2018 Bel Power Solutions & Protection Safety and Installation Instruction Pin Allocation Table 12: Pin allocation Pin no. Single-output Double-output

1 PUL PUL

2 Vi– Vi–

3 n.c. / Vi– 1 n.c. / 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)

1 Only connected at 24IMX models, n.c. for 110IMY 2 i if option i (inhibit) is fitted Installation Instructions Installation of the converters must strictly follow the national safety regulations in compliance with the enclosure, mounting, creepage distances and clearances, markings, and segre gation requirements of the end-use application. 09122b Bottom view 4 threads M3 case screw M3 lock washer PCB earthed copper area JM043 Fig. 15 Footprint. The holes in the PCB should have a diameter of 1.6 mm. Fig. 16 Reliable connection of the metallic case to protective earth (110IMY70 models). Use at least 2 screws ! Connection to the system shall be made via a printed circuit board with hole diameters of 1.6 mm for the pins. Connect both input pins for 24IMX70 models. The converters should be connected to a secondary circuit. Ensure that a converter failure (e.g. by an internal short-circuit) does not result in a hazardous condition.

tech.support@psbel.com belfuse.com/power-solutions BCD.00002 Rev AJ, 28-May-2018 Page 16 of 17 IMX70 / IMY70 Series 70 to 90 Watt DC-DC Converters © 2018 Bel Power Solutions & Protection Standards and Approvals The converters are safety agency approved to the standards IEC/EN 60950 and UL/CSA 60950-1 2nd Edition. The converters have been evaluated for:

• Building-in
• Basic insulation input to output for 24IMX70 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 and 16.
• 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. CB scheme is available. Input Fuse 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 The protection degree is IP 40 (except option Z). In order to avoid possible damage, any penetration of cleaning fluids should be prevented, since the converters are not hermetically sealed. 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/distilled water (1 : 1). The mother board can also be cleaned, before fitting the open-frame converter. Note: Other cleaning liquids can damage the adhesive joints of the ferrite cores. Isolation The electric strength test is performed in the factory as a routine test in accordance with EN 50514, 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 Characteristics Input to (Outputs + Case) 24IMX70 1 Input to (Outputs + Case) 110IMY70 1 Outputs to Case all models 1 Between Outputs all models Unit Factory test ≥1 s 1.5 2 3 0.5 0.15 3 kVDC Equivalent DC voltage 2.1 4.2 0.7 0.21 3 kVAC Insulation resistance at 500 VDC >100 >100 --- --- MΩ 1 For open-frame models (option Z), only the insulation input to outputs is tested. 3 The test voltage between outputs is not applied as routine test.

tech.support@psbel.com belfuse.com/power-solutions BCD.00002 Rev AJ, 28-May-2018 Page 17 of 17 IMX70 / IMY70 Series 70 to 90 Watt DC-DC Converters © 2018 Bel Power Solutions & Protection 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. Vi+ Vi– i 06138a Fig. 17 If the inhibit function is not used, connect the inhibit pin i with Vi–. 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 Option Z 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. 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.