Industrial Environment DC/DC Converters < 40W 6 Watt SMD and through hole DC/DC converters IMS6 Series IMS 6 Series Input to output electric strength test up to 2 kV DC Input voltage ranges: 18...36 and 36...75 V DC Single and dual outputs of 5, 12, 15 V DC • Wide input voltage ranges • Electrical isolation, single and dual outputs • Immunity to IEC/EN 61000-4-2, -3, -4, -5 and -6 • High efficiency (typ. 82%) • Flex power: flexible load distribution • No load and short-circuit proof • High reliability and no derating • Operating ambient temperature –40...+ 71 oC • Industrial, alternative and SMD pinout • DIL 24 case with 9.0 mm profile Safety approvals pending to IEC/EN 60950, UL 1950 LGA C Summary The IMS 6 series of board mountable 6 W 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 telecommunications where variable input voltages or high transient voltages are prevalent. Covering a total input voltage range from 18 V DC up to 75 V DC. The converters are designed and built according to the international safety standards IEC/EN 60950, UL 1950, CAN/CSA C22.2 No.950-95 and are LGA and UL marked. A special feature is their small case size, DIL 24 with only 9.0 mm profile. The circuit comprises integrated planar magnetics and all components are automatically assembled and solidly soldered onto a single PCB without any wire connections. Thanks to the rigid mechanical design the units withstand an extremely high level of shock and vibrations. Careful considerations 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 71 C in free air without using any potting material. Options : SMD pinout or K-pinout, an alternative to the standard industrial pinout, provide a high level of application specific engineering and design-in flexibility. Table of Contents Page Page Summary .......................................................................... 1 Type Survey and Key Data .............................................. 2 Type Key .......................................................................... 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 ................................ 11 Description of Options .................................................... 13 Edition 1 06.00 Industrial Environment DC/DC Converters < 40W IMS6 Series Type Survey and Key Data Table 1: Type survey Output 1 Uo1 nom Io1 nom [V DC] [A] 1 5 5 12 12 15 15 5 5 12 12 15 15 1 1000 1000 500 500 400 400 500 500 250 250 200 200 Output 2 Uo2 nom Io2 nom [V DC] [A] 1 5 5 12 12 15 15 Output Power Po nom [W] Input voltage range [V DC] Efficiency 5.0 5.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 18...36 36...75 18...36 36...75 18...36 36...75 18...36 36...75 18...36 36...75 18...36 36...75 82 82 83 83 84 84 82 82 83 83 84 84 500 500 250 250 200 200 typ Type designation Options [%] 24IMS6-05-9 48IMS6-05-9 24IMS6-12-9 48IMS6-12-9 24IMS6-15-9 48IMS6-15-9 24IMS6-0505-9 48IMS6-0505-9 24IMS6-1212-9 48IMS6-1212-9 24IMS6-1515-9 48IMS6-1515-9 M, K, Z M, K, Z M, K, Z M, K, Z M, K, Z M, K, Z M, K, Z M, K, Z M, K, Z M, K, Z M, K, Z M, K, Z Flexible load distribution on double outputs possible to 75% , 25% asymetric loading. Type Key 48 IMS 6 - 05 05 -9 K M Z Input voltage range Ui 16...36 V DC ............................................. 24 36...75 V DC ........................................... 48 Series ........................................................................ IMS 6 Output voltage type for output 1 ......................... 05, 12, 15 Output voltage type for output 2 ......................... 05, 12, 15 Operating ambient temperature range TA –40...71 C .................................................. -9 Options: 1 Alternative pinout ......................................... K 1 2 SMD-pinout ................................................. M 1 2 Open frame ................................................. Z Option M excludes option K and vice versa 2 For delivery lead times contact factory. Some types require a minimum order quantity. Edition 1 06.00 Industrial Environment DC/DC Converters < 40W IMS6 Series Functional Description The IMS 6 DC-DC modules are feedback controlled flyback converters using current mode PWM (Pulse Width Modulation). Current limitation is provided by the primary circuit, thus limiting the total output current (Io nom for the single and Io1 nom + Io2 nom for the dual output types). The converter input is protected against transients by means of a suppressor diode. The close magnetic coupling provided by the planar construction ensures very good regulation and allows for flexible load distribution on dual output types. The output voltage is monitored by a separate transformer winding close to the secondary windings and fed back to the control circuit. 03045 03044 Vi+ 22 14 Vo+ Vi+ 22 14 Vo+ 23 23 PWM PWM 16 Go 16 Vo– 2 2 Vi– 3 10 Fig. 1 Block diagram for single output types. Standard industrial pinout. 11 Vo– Vi– 3 Fig. 2 Block diagram for dual output types. Standard industrial pinout. 03047 03046 Vi+ 1 13 Vo+ 15 Vo+ Vi+ 1 n.c. 2 PWM PWM 10 11 12 Vo– 13 Vo– Vi– 24 Vi– 24 Fig. 3 Block diagram for single output types. Special pinout (Option K). Fig. 4 Block diagram for dual output types. Special pinout (Option K). 03049 03048 Vi+ 22 13 14 Vo+ 23 1 PWM 15 14 Vo+ Vi+ 22 15 23 1 PWM 3 Vi– 2 12 Vo– 16 10 n.c. 24 3 Vi– 2 9 n.c. Fig. 5 Block diagram for single output types. SMD pinout (Option M). Fig. 6 Block diagram for dual output types. SMD pinout (Option M). Edition 1 06.00 9 n.c. 10 11 24 Go 16 Go 13 12 Vo– 11 Industrial Environment DC/DC Converters < 40W IMS6 Series Electrical Input Data General conditions: TA = 25 C, unless TC is specified. Table 2: Input Data Input 1 2 3 24 IMS 6 Characteristics Conditions min Ui 18 Ui nom Nominal input voltage TC min...TC max Io = 0...Io nom Ui sur Repetitive surge voltage abs. max input (3 s) Input voltage range t start up Converter start-up t rise Rise time 1 time 1 Worst case condition at Ui min and full load Ui nom Io nom 48 IMS 6 max min typ 36 typ 36 24 max Unit 75 V DC 48 40 0.25 0.5 100 0.25 0.5 resistive load 5 5 capacitive load 12 12 Ii o No load input current Io = 0, Ui min...Ui max Ci Input capacitance for surge calculation I inr p Inrush peak current Ui = Ui nom 3 fs Switching frequency Ui min...Ui max, Io = 0...Io nom I i rr Reflected ripple current Io = 0...Io nom ui RFI Input RFI level conducted and radiated EN 55022 2 15 mA 0.54 0.3 uF 3.7 4.2 A 30 mApp approx. 400 approx. 400 30 B 1 Measured with a resistive or max. admissible capacitive load. (See fig.: Converter start-up and rise time) External filter required. (See: Filter recommendations for compliance with EN 55022) Source impedance according to prETS 300132-2, version 4.3. Edition 1 06.00 ms 10 20 5 s B 1 kHz Industrial Environment DC/DC Converters < 40W 04008 Uo Reverse Polarity Protection at Input t rise Uo nom The suppressor diode on the input also provides for reverse polarity protection by conducting current in the reverse direction, thus protecting the unit. An external fuse is required to limit this current: – For 24 IMS 6 a fast 0.63 A (F0.63A) fuse is recommended – For 48 IMS 6 a fast 0.35 A (F035A) fuse is recommended t t start up Fig. 7 Converter start-up and rise time Filter recommendations for compliance with EN 55022 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 limit this current further. 1 A/Div. 4 IMS6 Series Electromagnetic emission requirements according to table Input data can be achieved by adding an external capacitor as close as possible to the input terminals. 04035 Vi+ 04034 Ci Vi– 3 2 Fig. 9 Input filter arrangement 1 Table 3: Input filter components (EN 55022) Ref. 0 C1 5 s/Div. Fig. 8 Typical inrush current at Ui nom, Po nom versus time (48 IMS6 ) measured according to prETS 300132-2, version 4.3. Type Edition 1 06.00 24 IMS 6 2.2 , F, 100 V, 48 IMS 6 2.2 F, 150 V, ceramic or film Industrial Environment DC/DC Converters < 40W IMS6 Series Electrical Output Data General conditions: TA = 25 C, unless TC is specified. Table 6a: Output data for single output units N/A Uo nom Output 5.0 V 12.0 V 15.0 V Characteristics Conditions min typ max min typ max min typ max Uo Ui nom, Io = 0.5 Io nom 4.96 Output voltage Io nom Output current Io L Current limit 2 Ui min...Ui max 5.04 11.90 1000 Ui nom, TC = 25 C 12.10 500 14.88 15.12 400 700 600 Ui min...Ui max, Io nom 1 1 1 U Ui nom Io = (0.1...1) Io nom 3 3 3 5 80 120 150 uo1, 2 Output voltage noise Uo clp Output overvoltage limitation Ui min...Ui max I o = I o nom 6 20 40 Min. load 1% Co ext Admissible capacitive load 3 uo d td Uo Dynamic Voltage deviat. load Recovery time regulat. Ui nom Io nom Temperature coefficient Uo / TC Ui min...Ui max Io = 0...Io nom 40 50 % mVpp 75 130 130 130 % 680 150 100 uF 250 1 60 VDC mA 1400 Uo U Line regulation Load regulation Unit /2 Io nom 0.02 250 250 mV 1 1 ms 0.02 0.02 %/K Table 6b: Output data for dual output units Uo nom Output 5V Characteristics Conditions min typ max Uo1 Uo2 Ui nom Io1 = Io2 = 0.5 Io nom 4.96 4.95 Output voltage Io nom Output current 1 Uo U Line regulation U Load regulation 4 uo1, 2 Output voltage noise Uo clp Output overvoltage limitation 5.04 5.05 uo d td Uo 2 3 4 5 6 11.90 11.88 2 N/A 15 V min typ max 2 x 500 Ui min...Ui max 12.10 12.12 x 350 min typ max 14.88 14.85 2 VDC 200 mA x 1 1 1 Ui nom Io = (0.1...1) Io nom 3 3.5 3 100 140 150 Ui min...Ui max I o = I o nom 5 6 40 Min. load 1% Dynamic Voltage deviat. load Recovery time regulat. Ui nom Io nom Temperature coefficient Uo / TC Ui min...Ui max Io = 0...Io nom 1 /2 Io nom 60 45 70 Unit 15.12 15.15 Ui min...Ui max, Io nom Co ext Admissible capacitive load 3 1 12 V 50 % mVpp 75 130 130 130 % 680 150 100 uF 250 600 750 mV 1 1 1 ms 0.02 0.02 0.02 %/K Each output 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. Edition 1 06.00 Industrial Environment DC/DC Converters < 40W IMS6 Series Thermal Considerations Output overvoltage protection If a converter, mounted on a PCB, is located in free, quasistationary air (convection cooling) at the indicated maximum ambient temperature TA max (see table: Temperature specifications) and is operated at its 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 are influenced by 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 than this value. The outputs of the IMS 6 converters are protected against overvoltages by Zener diodes. In the event of an overvoltage on the output, the unit will shut-down 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 units are not designed to withstand external overvoltages applied to the outputs. 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 value. The installer must ensure that under all operating conditions TC remains within the limits stated in the table Temperature specifications. The outputs of several units with equal nominal output voltage can be connected in parallel. Approximate current sharing between 2 or several units is ensured by their load dependent output characteristic. Connection in series The outputs of single or dual output units can be connected in series without any precautions, taking into consideration that the highest output voltage should remain below 60 V for SELV operation. Connection in parallel Short Circuit Behaviour The current limit characteristic shuts down the converter whenever a short circuit is applied to its output. It acts selfprotecting and automatically recovers after removal of the overload condition. Typical Performance Curves Uo [V] Uo1 + Uo2 [V] 05056 5.25 05057 31.5 31 5.0 30.5 4.75 30 4.5 29.5 4.25 29 4.0 0 28.5 1.0 0.5 0 Io [A] Fig. 12 Uo versus Io (typ) of single output units (example for 48IMS6-05-9 Uo1 [V] 33 66 100 133 166 200 233 Io [mA] Fig. 13 Uo versus Io (typ) of dual output units ( 15 V), with 30 V load connected to Vo+ and Vo–. Uo1 , Uo2 [V] 05058 16.5 16 05059 12.8 12.4 15.5 Uo2 Uo1 12 Io2 = 140 mA 15 11.6 Io2 = 14 mA 14.5 11.2 14 0 33 66 100 33 66 200 233 Io1 [mA] Fig. 14 Cross load regulation of dual output units. Uo1 versus Io1 (typ) for various Io2 (48IMS6-1515-9). Edition 1 06.00 0 150 300 Io1 [%] Io1 no Fig. 15 Flexible load distribution on dual outputs (2 x 12 V) with load variation from 0...150% of Po1 nom on output 1. Output 2 loaded with 25% of Po2 nom. Industrial Environment DC/DC Converters < 40W IMS6 Series 05060 Uo [%] 05041 90 [%] overload short circuit condition 100 switch-off Ui nom Ui max Ui min 80 70 70 8.5 60 t [ms] 50 60.5 60.5 Fig. 16 Overload switch-off (hiccup mode). Frequency of pulses: 16.5 Hz, puls duration: 8.5 ms. 40 25 50 75 Fig. 17 Efficiency versus input voltage and load. Typical values (48IMS6 -1212-9) Edition 1 06.00 100 [%] Po nom Industrial Environment DC/DC Converters < 40W IMS6 Series Electromagnetic Emission Radiated RFI noise according to EN 55022. Conducted RFI noise at input according to EN 55022 [dB V] 90 [dB V/m] 50 07033 07034 80 EN 55022 A 40 70 EN 55022 B 60 EN 55022 B 30 50 40 20 30 10 20 10 1000 500 200 100 Frequency [MHz] Fig. 18 Typical disturbance voltage (quasi-peak) at the input according to CISPR 11/EN 55011 and CISPR 22/EN 55022, measured at Ui nom and Io nom. Output leads 0.1 m, twisted. External capacitor at the input required (see: Recommendations for compliance with EN 55022). (48 IMS6-1515-9) Fig. 19 Typical radio frequency interference voltage at Ui nom, Io nom, measured with an antenna (distance 10 m). Output leads 0.1 m, twisted (48 IMS6-1515-9). Mechanical Data Dimensions in mm. Tolerances 0.3 mm unless otherwise indicated. 33 11 x 2.54 = 27.94 min. 3 09042 13 24 12 1 20 15.24 50 20 30 10 5 2 1 0.5 0.1 0.05 0.01 0.02 MHz 30 0 0 8.5 Measuring point of case temperature TC 0.5 Fig. 20 Case DIL 24, for IMS6 Weight: <10 g Edition 1 06.00 European Projection Industrial Environment DC/DC Converters < 40W IMS6 Series Immunity to Environmental Conditions Table 8: Mechanical stress Test Method Standard Test Conditions Status 2 Ca Damp heat steady state IEC/DIN IEC 60068-2-3 MIL-STD-810D section 507.2 Temperature: Relative humidity: Duration: C 40 93 +2/-3 % 56 days Unit not operating Ea Shock (half-sinusoidal) IEC/EN/DIN EN 60068-2-27 MIL-STD-810D section 516.3 Acceleration amplitude: Bump duration: Number of bumps: 100 gn = 981 m/s2 6 ms 18 (3 each direction) Unit operating Eb Bump (half-sinusoidal) IEC/EN/DIN 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) Unit operating Fc Vibration (sinusoidal) IEC/EN/DIN EN 60068-2-6 MIL-STD-810D section 514.3 Acceleration amplitude: Unit operating Frequency (1 Oct/min): Test duration: 0.35 mm (10...60 Hz) 5 gn = 49 m/s2 (60...2000 Hz) 10...2000 Hz 7.5 h (2.5 h each axis) Fda Random vibration wide band reproducibility high IEC 60068-2-35 Acceleration spectral density: Frequency band: Acceleration magnitude: Test duration: 0.05 gn2/Hz 10...500 Hz 4.9 gn rms 3 h (1 h each axis) Unit operating Kb Salt mist, cyclic (sodium chloride NaCl solution) IEC/EN/DIN IEC 60068-2-52 Concentration: Duration: Storage: Storage duration: Number of cycles: 5% (30 C) 2 h per cycle 40 C, 93% rel. humidity 22 h per cycle 3 Unit not operating Table 9: Temperature specifications, valid for air pressure of 800...1200 hPa (800...1200 mbar) Temperature Characteristics 1 2 TA Ambient temperature 1 TC Case temperature TS Storage temperature 1 Standard -9 Conditions min max Unit Operational 2 –40 71 C Non operational –40 100 –40 100 MIL-STD-810D section 501.2 and 502.2 See Thermal Considerations Table 10: MTBF and device hours MTBF 1 Ground Benign Ground Fixed Ground Mobile MTBF acc. to MIL-HDBK-217F TC = 40 C TC = 40 C TC = 70 C TC = 50 C 48IMS6-05-9 2'651'000 h 349'000 h 124'000 h 119'000 h Statistical values, based on an average of 4300 working hours per year and in general field use Edition 1 06.00 Device Hours 1 Industrial Environment DC/DC Converters < 40W IMS6 Series Safety and Installation Instructions Installation Instruction Table 12: Pin allocation for K pinout (option K) 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. Pin Connection to the system shall be made via a printed circuit board according to: Mechanical Data. Single output units Dual output units 1 Vi+ Vi+ 2 n.c. - 10 - Go 11 - Go The units should be connected to a secondary circuit. 12 Vo– - Check for hazardous voltages before altering any connections. 13 Vo+ Vo– 15 - Vo+ 24 Vi– Vi– Do not open the module. Ensure that a unit failure (e.g. by an internal short-circuit) does not result in a hazardous condition. See also: Safety of operator accessible output circuit. Table 11: Pin allocation for standard industrial pinout Pin Single output units Dual output units 2 Vi– Vi– 3 Vi– Vi– 10 n.c. - 11 - Vo– 14 Vo+ Vo+ 16 Vo– Go 22 Vi+ Vi+ 23 Vi+ Vi+ 10013 24 13 Bottom view 12 1 Table 13: Pin allocation for SMD pinout (option M) Pin Single output units Dual output units 1 Vi+ Vi+ 2 V i– Vi– 3 V i– Vi– 9 n.c. n.c. 10 n.c. Go 11 Vo– Vo– 12 Vo– Vo– 13 Vo+ Vo– 14 Vo+ Vo+ 15 Vo+ Vo+ 16 Vo– Go 22 Vi+ Vi+ 23 Vi+ Vi+ 24 Vi- Vi+ Fig. 22 Pin numbering Input Fuse Safety of operator accessible output circuits To prevent excessive current flowing through the input supply line in case of a short-circuit across the converter input an external fuse should be installed in a non earthed input supply line. We recommend a fast acting fuse F0.5A for 24 IMS 6 and F0.315A for 48 IMS 6 types. If the output circuit of a DC-DC converter is operator accessible, it shall be an SELV circuit according to IEC/EN 60950 related safety standards Standards and approvals All DC-DC converters are UL recognized according to UL 1950, UL recognized for Canada to CAN/CSA C22.2 No. 950-95 and LGA approved to IEC/EN 60950 standards. The units have been evaluated for: • Building in • Supplementary insulation input to output, based on their maximum input voltage • The use in a pollution degree 2 environment • Connecting the input to a secondary circuit which is subject to a maximum transient rating of 1500 V. The DC-DC converters are subject to manufacturing surveillance in accordance with the above mentioned UL, CSA, EN and ISO 9001 standards. Edition 1 06.00 The insulation concept table below shows some possible installation configurations, compliance with which causes the output circuit of the DC-DC converter to be an SELV circuit according to IEC/EN 60950 up to a configured output voltage (sum of nominal voltages if in series or +/– configuration) of 46 V. However, it is the sole responsibility of the installer to ensure the compliance with the relevant and applicable safety regulations. More information is given in: Technical Information: Safety. Industrial Environment DC/DC Converters < 40W IMS6 Series Table 14: Electric strength test voltages Cleaning Agents In order to avoid possible damage, any penetration of cleaning fluids has to be prevented, since the power supplies are not hermetically sealed. Protection Degree The protection degree of the DC-DC converters is IP 30. Characteristic Input - Output 24/48 IMS 6 Unit Electric strength test voltage 1 s 1.2 kVrms 1.5 kV DC 1.2 nF Coupling capacitance Isolation The electric strength test is performed as factory test in accordance with IEC/EN 60950 and UL 1950 and should not be repeated in the field. Melcher will not honour any guarantee claims resulting from electric strength field tests. Insulation resist. at 500 V DC >100 Partial discharge extinction voltage Consult factory M kV Table 15: Insulation concept leading to an SELV output circuit Conditions Front end Supply voltage Minimum required grade of isolation, to be provided by the AC-DC front end, including mains supplied battery charger Mains Basic 250 V AC Maximum DC output voltage from the front end 1 60 V >60 V Double or reinforced 1 2 3 4 5 DC-DC converter Result Minimum required safety status of the front end output circuit Measures to achieve the specified safety status of the output circuit Safety status of the DC-DC converter output circuit Earthed SELV circuit 2 Operational insulation, provided by the DC-DC converter SELV circuit ELV circuit Input fuse 3 output suppressor diodes 4, and earthed output circuit 2 Earthed SELV circuit Operational insulation, provided by the DC-DC converter SELV circuit Hazardous voltage secondary circuit 60 V SELV circuit The front end output voltage should match the specified input voltage range of the DC-DC converter. The earth connection has to be provided by the installer according to the relevant safety standard, e.g. IEC/EN 60950. The installer shall provide an approved fuse (type with the lowest rating suitable for the application) in a non-earthed input line directly at the input of the DC-DC converter (see fig.: Schematic safety concept). For UL’s purpose, the fuse needs to be UL-listed. See also: Input Fuse. Each suppressor diode should be dimensioned in such a way, that in the case of an insulation fault the diode is able to limit the output voltage to SELV (<60 V) until the input fuse blows (see fig.: Schematic safety concept). Has to be insulated from earth by double or reinforced insulation according to the relevant safety standard, based on the maximum output voltage from the front end. ~ Mains ~ 10004 Fuse AC-DC front end Battery Earth connection + DC-DC converter Suppressor diode SELV – Earth connection Fig. 23 Schematic safety concept. Use fuse, suppressor diode and earth connection as per table: Safety concept leading to an SELV output circuit. Edition 1 06.00 Industrial Environment DC/DC Converters < 40W IMS6 Series Description of Options Table 16: Survey of options Function of option Characteristic Bare board construction without case. Consult factory. Not available for 5 IMX 4 and 70 IMX 4 types Z Available in 'open frame' version without case M Surface mount version, SMD K Alternative pinout Not available for 5 IMX 4 and 70 IMX 4 types as well as all types with 3.3 V or 24 V outputs Option K Alternative pinout. Note: Precautions should be taken when reflow soldering the SMD version, option M. The reflow soldering instructions below should be strictly adhered to. An inadequate soldering process may permanently damage the converter or degrade its performance and Melcher will not honour any guarantee/warranty claims resulting from damage caused by ignoring the soldering instructions. This option defines an alternative pinout. Option K excludes option M and vice versa. 24 1 27.94 ( 11 x 2.54) Infrared soldering is not permitted. The surface mountable version of this product is assembled with high melting point solder (227 C) to ensure that the solder joints of of the internal components do not degrade in the end users SMD soldering process. This product is only specified for "Forced Convection Reflow Soldering" (Hot Air). Any conventional soldering profile is acceptable provided that the restriction curve below is not exceeded at any time during the reflow process. 12 13 2.5 26.6 Tpeak [ C] 11051 240 235 Fig. 25 Proposed solder lands. 230 225 220 215 210 t [s] 205 0 10 20 30 50 40 Fig. 24 Forced convection reflow soldering restriction curve measured on pin 2 Edition 1 06.00 11052 Option M Surface mount version. 2 Option