IMX15, IMY15, IMS15 Series Data Sheet 15 Watt DC-DC Converters

Transcription

1 Description 0.6.6" 0. 0.".0" The IMX, IMS, and IMY Series of board mountable Watt DC-DC converters have 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 8. up to 0 V with different models, the converters are available with single and electrically-isolated double outputs from. up to 8 V, externally adjustable, with flexible load distribution on double-output models. A shutdown input allows for remote on/off. Features include efficient input and output filtering and consistently high efficiency over the entire input voltage range, high reliability, and excellent dynamic response to load and line changes. The converters have been approved by CSA. 0IMS/0IMX and 0IMS/0IMX models exhibit a basic insulation. The 0IMY models provide double insulation and are CE Features Wide input voltage ranges up to 0 VDC or isolated outputs up to 8 V RoHS lead-free-solder and lead-solder-exempted products are available. year warranty for RoHS lead-free-solder products with temperature index to 000 VAC I/O voltage withstand test Emissions EN 0, group, level A Immunity to EN 0 and -- High efficiency (typ. 86%) Input undervoltage lockout Shutdown input, adjustable output voltages Flex power: Flexible load distribution on outputs Outputs no-load, overload, and short-circuit proof Operating ambient temperature 0 to 8 C Thermal protection " x.6" case with 0. mm profile Basic insulation: 0/0IMX models; double or reinforced insulation: 0IMY models Safety-approved according to the latest edition of EN/IEC and UL/CSA marked. They may be connected to a rectified 0 VAC source or a 0 V battery without any further insulation barrier. The circuitry is comprised of integrated planar magnetics. All components are automatically assembled and solidly soldered onto a single PCB without any wire connection. Magnetic feedback ensures maximum reliability and repeatability in the control loop over all operating conditions. Careful consideration of possible thermal stress ensures the absence of hot spots providing long life in environments, where temperature cycles are frequent. The thermal design allows operation at full load up to an ambient temperature of 7 C in free air without using any potting material. For extremely high vibration environments the case has holes for screw fastening. 0IMY models Table of Contents Page Page Description... Model Selection... Functional Description... Electrical Input Data... Electrical Output Data... 8 Auxiliary Functions... Electromagnetic Compatibility (EMC)... Immunity to Environmental Conditions... 6 Mechanical Data... 7 Safety and Installation Instructions... 8 Description of Options... 9 Accessories... 9 Copyright 08, Bel Power Solutions Inc. All rights reserved. Page of 9

2 Model Selection Table : Model Selection Output Output Output Input voltage Efficiency Model Options V o nom I o nom V o nom I o nom power V i min to V i max η 6 min η 6 typ [VDC] [A] [VDC] [A] P o nom [W] [VDC] [%] [%] to IMX-0-8RG-G SR i, Z, non-g to IMX-0-8RG non-g to IMX-0-8RG-G SR i, Z, non-g to IMY-0-8RG-G SR i, Z, non-g to IMX-0-8RG-G SR i, Z, non-g to IMX-0-8RG-G SR i, Z, non-g to IMY-0-8RG-G SR i, Z, non-g to IMX-0-8R-G Z, non-g to IMS-0-9R to IMX-0-8R-G to IMY-0-8R-G Z, non-g to IMX-00-8RG i, Z, non-g to IMS-00-9R to IMX-00-8RG i, Z, non-g to IMS-00-9R to IMY-00-8RG i, Z, non-g to IMX-0-0-8G i, Z, non-g...0 to IMS to IMX-0-0-8G i, Z, non-g to IMY-0-0-8G i, Z, non-g to IMX---8G i, Z, non-g to IMS to IMX---8G i, Z, non-g to IMY---8G i, Z, non-g to IMX---8G i, Z, non-g to IMS to IMX---8G i, Z, non-g to IMY---8G i, Z, non-g to IMX---8G i, Z, non-g to IMS---9G non-g to IMX---8G i, Z, non-g to IMY---8G i, Z, non-g Flexible load distribution on dual and double outputs possible; up to 7% of the total output power P o nom on one of the outputs. IMX/IMY-00 models have reduced load distribution flexibility;.8 A max. on one of the outputs. The total output power should not exceed P o nom. See Description of Options. Short-time operation down to V i =. V possible (P o reduced to approx. 8% of P o nom ) Short-time operation down to V i =. V possible (P o reduced to approx. 8% of P o nom ) and up to V Initial start-up at 9 V, main output voltage regulation down to 8. V 6 Efficiency at T A = C, V i nom, I o nom. SR Models with synchronous rectifier. For the RoHS version of such models, add -G! Preferred for new designs. NFND Not for new designs. Replace IMS models by 0IMX and 8IMS by 0IMX; Replace 0IMX-0, 0IMX-0, 0IMY-0 by models with synchronos rectifier SR ; for new designs, chose always the RoHS version! Page of 9

3 RoHS-Compliant Models The type designation of RoHS-compliant models (compliant for the restriction of all six substances) for the IMX/IMY Series ends with "G". However, in single-output models with. V or. V output an extra hyphen (-) is added after the existing "G", which already signifies a synchronous rectifier SR. This is an exception to our normal nomenclature to identify this type of product, since G was already used to designate products for higher output current fitted with a synchronous rectifier. Some examples 0IMX-0-8R-G designates a standard version with RoHS compliance for all six substances. 0IMX-0-8RG designates a synchronous rectifier SR version which is not RoHS-compliant. 0IMX-0-8RG-G designates a synchronous rectifier SR version and RoHS compliant for all six substances. 0IMX-0-0-8G designates a double-output model with RoHS compliance for all six substances 0IMY---8RG designates a double-output model with RoHS compliance for all six substances. Part Number Description xxix 0 IMX R G Z -G Input voltage range V i 8. to 6 V... 0 to 6 V to 7 V to 7 V to 0 V... 0 Series IMX, IMS, IMY Output voltage of output...0, 0,,, Hyphen designating double-output models with two electrically isolated outputs...- Output voltage of output...0, 0,,, Operating ambient temperature range T A 0 6 to 8 C to 7 C...-9 Options and features: R input and magnetic feedback... R Synchronous rectification... G Inhibit... i Open frame...z RoHS-compliant for all 6 substances... G or -G Not applicable to -00 models. They have a common ground. IMS models are not recommended for new designs. Standard for single-output and -00 models Option i replaces the standard shutdown function; see Description of Options. RoHS models with synchronous rectifier are ending with -G, as an exception. 6 Only C for older -8RG SR models (Rev. < BA); see table 7a. Note: The sequence of options must follow the order above! Examples: 0IMX-0-0-8G: DC-DC converter, input 9 to 6 V, galvanically isolated outputs each providing V,. A, RoHScompliant. 0IMY-00-8RG: DC-DC converter, input 0 to 0 V, outputs with common return providing +. V,. A and +. V,. A, RoHS-compliant. Converter fitted with magnetic feedback for tight output voltage regulation. Product Marking The converters without option Z are marked with basic type designation, input and output voltages and currents, applicable safety approval and recognition marks, company logo, date code, and serial number. Page of 9

4 Functional Description The IMX/IMS/ IMY Series of DC-DC converters are magnetic feedback-controlled flyback converters using current mode PWM (Pulse Width Modulation). The -0- and -00- output voltage models exhibit an active magnetic feedback loop via a pulse transformer, resulting in very tight regulation of the output voltage (see the block diagrams). The output voltages of these models can be adjusted via the R-input. The R-input is referenced to the secondary side and allows for programming the output voltages in the range of approximately 80 to 0% of V o nom, using either an external resistor or an external voltage source. Several single-output models with. or. V output exhibit a synchronous rectifier to improve the efficiency. The voltage regulation on the double-output models is achieved with an auxiliary winding of the main transformer. The output voltages can be adjusted via the Trim input, which is referenced to the primary side and allows for programming the output voltage in the range of 00 to 0% of V o nom via an external resistor, or within 7 to 0% if using an external voltage source. The load regulation output characteristic allows for paralleling of one or more double-output models with equal output voltage. Current limitation is provided by the primary circuit, thus limiting the total output power of double-output models. The shutdown input allows remote converter on/off. Overtemperature protection will disable the converter under excessive overload conditions with automatic restart. Vi+ SD n.c. Vi PWM x 00 pf Fig. Block diagram of -00-models Vi+ SD Trim PWM 0089a Vo+ Go Vo+ Go 7 R 0090a Vo+ Vo Vo+ Vi+ 009a Vo+ Vi x 00 pf Vo 7 n.c. SD n.c. Vi PWM x 00 pf 00 V Vo Fig. Block diagram of double-output models 7 R Fig. Block diagram of single-output models Page of 9

5 Electrical Input Data General conditions: T A = C, unless T C is specified. Shut-down pin left open-circuit. Trim or R input left open-circuit. Table a: Input data of IMX and IMY models Input 0IMX 0IMX 0IMY Unit Characteristics Conditions min typ max min typ max min typ max V i Input voltage range T A min T A max 9, , V V i nom Nominal input voltage I o = 0 I o nom V i sur Repetitive surge voltage Abs. max input ( s) t startup Converter Switch on Worst case condition at s start-up time SD high V i min, I o = I o nom t rise Rise time V i nom, resistive load ms I o nom, capac. load I i o No-load input current I o = 0, V i min V i max 6 ma I irr Reflected ripple current I o = 0 I o nom ma pp I inr p Inrush peak current V i = V i nom A C i Input capacitance for surge calculation µf V S D Shutdown voltage Converter disabled 0 to to to 0.7 V Converter operating open or 0 open or 0 open or 0 R S D Shutdown input resistance approx. 0 approx. 0 approx. 0 kω I S D Input current, when V i min V i max 0 ma disabled SD connected to Vi f s Switching frequency V i min V i max, approx. 00 approx. 00 approx. 00 khz I o = 0 I o nom If V o is set above V o nom by use of the R or Trim input, V i min will be proportionately increased. Measured with resistive and max. admissible capacitive load. Valid for models with rev. AI or greater. Source impedance according to ETS 00-, version.. Double-output models with both outputs in parallel. External filter as in fig. 6, table 6. Input undervoltage lockout at typ. 80% of V i min. 6 Short time operation down to V i min >. V possible. P o reduced to approx. 8% of P o nom. 7 Initial start-up at V i = 9 V, main output voltage regulation down to 8. V 8 Short time operation up to V possible for s. Page of 9

6 Table b: Input Data of IMS models; general conditions as in table a Input IMS 8IMS Unit Characteristics Conditions min typ max min typ max V i Input voltage range T A min T A max V V i nom Nominal input voltage I o = 0 I o nom 8 V i sur Repetitive surge voltage Abs. max input ( s) 0 00 t startup Converter Switch on Worst case condition at s start-up time SD high V i min, I o = I o nom t rise Rise time V i nom, resistive load ms I o nom, capac. load I i o No-load input current I o = 0, V i min V i max ma I irr Reflected ripple current I o = 0 I o nom 0 0 ma pp I inr p Inrush peak current V i = V i nom. A C i Input capacitance for surge calculation µf V S D Shutdown voltage Converter disabled 0 to to 0.7 V Converter operating open or 0 open or 0 R S D Shutdown input resistance approx. 0 approx. 0 kω I S D Input current, when V i min V i max.. ma disabled SD connected to Vi f s Switching frequency V i min V i max, approx. 00 approx. 00 khz I o = 0 I o nom If V o is set above V o nom by use of the R or Trim input, V i min will be proportionately increased. Measured with resistive and max. admissible capacitive load. Source impedance according to ETS 00-, version.. Double-output models with both outputs in parallel. External filter as in fig. 6, table 6. Input undervoltage lockout at typ. 80% of V i min. Page 6 of 9

7 Inrush Current The inrush current has been made as low as possible by choosing a very small input capacitance. A series resistor may be installed in the input line to further reduce this current. A 00b Model 0IMX IMS 0IMX, 8IMS 0IMY Fuse type F.0 A F. A F.0 A F.0 A Fig. Typical inrush current at V i nom, P o nom versus time (0IMX). Source impedance according to ETS 00- at V i nom. V o V o nom t µs t startup t rise Fig. Converter start-up and rise time 0008b Input Undervoltage Lockout A special feature of these converters is the accurate undervoltage lockout protection, which protects against large currents caused by operation at low voltages. This ensures easier start-up in distributed power systems. Tab. : Turn on and turn off voltage Model Turn on Turn off Unit min max min max 0IMX V IMS.. 0IMX.. 8IMS.. 0IMY Fuse and Reverse Polarity Protection 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 : Recommended external fuses t Input Transient Voltage Protection A built-in suppressor diode provides effective protection against input transients, which typically occur in many installations. Table : Built-in transient voltage suppressor Type Breakdown Peak power Peak pulse voltage at ms current V Br nom [V] P p [W] I pp [A] 0IMX 0 00 IMS IMX IMS IMY For very high energy transients as for example to achieve compliance to IEC/EN (see table Electromagnetic Immunity), an external inductor and a capacitor are required, see Fig. 6. The components are specified in table 6. C + L + C Vi+ 0IMX 0IMX 0IMY Fig. 6 Example for external circuitry to achieve better transient immunity. Values of components in the table below. Table 6: Components for external circuitry for IEC/EN , level compliance. D Model Inductor (L) Capacitor (C) Diode (D) 0IMX 7 µh,. A x 0 µf, 6 V.k E7A IMS 0 µh,. A x 0 µf, 6 V -- 0IMX 0 µh,. A x 0 µf, 00 V -- 8IMS 0 µh, A x 0 µf, 00 V -- 0IMY 0 µh, 0. A x 0 µf, 00 V -- Vi JM Page 7 of 9

8 Electrical Output Data We recommend connecting an external µf ceramic capacitor across the output pins. General conditions: T A = C, unless T C is specified Shutdown pin and Trim or R pin left open-circuit (not connected) Table 7a: Output data for single-output models -0-8RG and 0-8RG Output. V. V Unit Characteristics Conditions min typ max min typ max V o Output voltage V i nom...0. V I o = 0. I o nom I o nom Output current 0IMX V i min to V i max.. A 0IMX /0IMY.. I o L Current limit V i nom, T C = C V o 9% V o nom V o Line/load regulation V i min to V i max, ±0. ±0. % (0. to ) I o nom V o Output voltage noise V i min to V i max mv pp I o = I o nom V o L Output overvoltage limit. 0 0 % C o ext Admissible capacitive load µf V o d Dynamic Voltage deviat. V i nom ±0 ±0 mv load I t o d Recovery time o nom / I o nom ms regulation IEC/EN 60 α Vo Temperature coefficient V i min to V i max ±0.0 ±0.0 %/K V o / T C (0. to ) I o nom SR Models -8RG (synchr. rectifier) have a minimum case and operating temperature of C. If the revision is BA (or later), it is 0 C. The current limit is primary side controlled. In the event of a sustained overload condition the thermal protection may cause the converter to shut down (automatic restart after cooling down). The overvoltage protection is via a primary side second regulation loop. It is not tracking with R control. BW = 0 MHz Measured with a probe according to EN 60 6 For 0IMY models, C o ext is limited to 000 µf. Page 8 of 9

9 Table 7b: Output data for -0-8R and -00-8R models; general conditions as in table 7a Output. V./. V Unit Characteristics Conditions min typ max min typ max V o, V o Output voltage V i nom V V o I o = 0. I o nom..6 I o nom Output current 0IMX V i min V i max...6 A IMS/8IMS IMX/0IMY...8 I ol, I ol Current limit 0IMX V i nom..7 I ol V o 9% V o nom.8 I ol, I ol IMS/8IMS..0 I ol.8 I ol /I ol 0IMX/0IMY.6.9 I ol.0 V o Line/load regulation. V V i min V i max, ±0. %. V (0. ) I o nom + /. V ±. V o/ Output voltage noise V i min V i max mv pp I o = I o nom V o L Output overvoltage limit % C o ext Admissible capacitive load µf V o d Dynamic Voltage deviat. V i nom ±0 ±0 mv t o d load I Recovery time o nom / I o nom regulation IEC/EN 60 ms α Vo Temperature coefficient V i min V i max ±0.0 ±0.0 %/K V o / T C (0. ) I o nom Flexible load distribution: I o max for one of the outputs; however the total load should not exceed P o nom specified in the table Model Selection. The current limit is primary-side controlled. For -00-models: total capacitive load of both outputs. For -00-models: Conditions for specified output. Other output loaded with constant current I o = 0. I o nom. BW = 0 MHz 6 Measured with a probe according to EN 60 7 The overvoltage protection is via a primary side second regulation loop. It is not tracking with R control. Page 9 of 9

10 able 7c: Output data for double-output models; general conditions as in table 7a Output V V V V Unit Characteristics Conditions min typ max min typ max min typ max min typ max V o Output IMS/8IMS V i nom V other models I o = 0. I o nom V o Output IMS/8IMS other models I o nom Output current 0IMX V i min V i max A other models I ol Current limit, 0IMX V i nom IMS/8IMS V o 9% V o nom IMX/0IMY V o Line/load regulation 8 output V i min V i max, I o nom ± ± ± ± % V o output V i nom, (0. ) I o nom ± ± ± ± V o/ Output voltage noise V i min V i max mv pp I o = I o nom V o L Output overvoltage limit 7 8 Min. load % % C o ext Admissible capacitive load µ F V o d Dynamic Voltage deviat. V i nom ±0 ±00 ±00 ±600 mv t o d load I Recovery time o nom / I o nom regulation ms α Vo Temperature coefficient V i min V i max ±0.0 ±0.0 ±0.0 ±0.0 %/K V o / T C (0. ) I o nom Flexible load distribution: Each output of double-output models is capable of delivering 7% of the total output power; however the total load should not exceed P o nom specified in the table Model Selection. The current limit is primary-side controlled. Measured with both outputs connected in parallel. Conditions for specified output. Other output loaded with constant current I o = 0. I o nom. BW = 0 MHz 6 Measured with a probe according to EN 60 7 The overvoltage protection is via a primary side second regulation loop, not tracking with Trim or R control. 8 At start-up occurs a short overshoot at the output. Page 0 of 9

11 Thermal Considerations If a converter, mounted on a PCB, is located in free, quasistationary air (convection cooling) at the indicated maximum ambient temperature T A max (see table Temperature specifications) and is operated at its nominal input voltage and output power, the case temperature measured at the measuring point of case temperature T C (see Mechanical Data) will approach the indicated value T C max after the warmup phase. However, the relationship between T A and T C 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. T A max is therefore only an indicative value. Caution: The case temperature T C measured at the measuring point of case temperature T C (see Mechanical Data) may under no circumstances exceed the specified maximum value. The installer must ensure that under all operating conditions T C remains within the limits stated in the table Temperature specifications. P o /P o max m/s = 00 LFM 0.6 natural cooling C Fig. 7 Maximum output power versus ambient temperature Overtemperature Protection The converters are protected from 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 in short intervals. This feature helps protect against excessive internal temperatures, which could occur during heavy overload conditions. Output Overvoltage Protection The output of single-output models as well as -00- and -0-0-models are protected against overvoltage by a second control loop. In the event of an overvoltage on one of the outputs, the converter will shut down and attempt to restart in short intervals. Doubel-output models (except -00- and -0-0-models) are protected against overvoltage by a Zener diode across the second output. Under worst case conditions the Zener diode will become a short circuit. Since with double-output models both outputs track each other, the protection diode is only provided in one of the outputs. The main purpose of this feature is to protect against possible overvoltage, which could occur due to a failure in the control logic. This protection circuit is not designed to withstand externally applied overvoltages. JM07 T A Short Circuit Behavior 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 (hiccup mode). Parallel and Series Connection The outputs of one or several single- or double-output models t 0 0. s Fig. 8 Overload switch-off (hiccup mode); typical values can be connected in series without any precautions, taking into consideration that the highest output voltage should remain below V to ensure that the output remains SELV. Both outputs of the same converter with equal voltage (e.g. V / V) can be connected in parallel and will share their output currents equally. Parallel operation of single or double outputs of two or more converters with the same output voltage may cause start-up problems at initial start-up. This is only advisable in applications, where one converter is able to deliver the full load current as, for example, required in true redundant systems. Note: If the nd output of double-output models (except 00) is not used, connect it in parallel to the st output. Typical Performance Curves General conditions: T A = º C, unless T C is specified. Shutdown pin left open-circuit. Trim or R input not connected. V V o [%] overload condition switch-off 00c A Fig. 9 V o versus I o (typ) of converters with V o =. V (0IMY-0-8R) 066a Page of 9

12 V 000a % 90 V i min 068a 0 80 V i nom V i max A I o P o /P o nom Fig. 0 V o versus I o (typ.) of double-output models ( x V), with both outputs in parallel (0IMY---8) Fig. b Efficiency versus input voltage and load. Typical values (0IMY---8) V. 00a % a V i nom V i max V i min. I o = 0.0 A I o = 0. A A I o Fig. Cross load regulation V o versus I o (typ.) for various I o ( x V) I o /I o nom Fig. c Efficiency versus input voltage and load. Typical values (8IMS---9) % 90 V i min 067a Vi nom V 009-Xb 80 V i max 70 V o V o P o /P o nom I o /I o nom Fig. a Efficiency versus input voltage and load. Typical values (0IMX---8). Fig. Flexible load distribution on double-outputs models with option R (0IMY---8R): Load variation from 0 to 0% of I o nom on output ; output loaded with 0% of I o nom. Page of 9

13 Auxiliary Functions Shutdown Function The outputs of the converters may be enabled or disabled by means of a logic signal (TTL, CMOS, etc.) applied to the shutdown pin. If this function is not required, the shut-down pin should be left open-circuit. Converter operating:.0 to 0 V Converter disabled: 0 to +0.7 V Adjustable Output Voltage R input for single-output models and -00-models Trim input for double-output models As a standard feature, the single- and double-output models offer adjustable output voltage(s) by using the control input R or Trim. If the control input is left open-circuit, the output voltage is set to V o nom. For output voltages V o > V o nom, the minimum input voltage V i min (see Electrical Input Data) increases proportionally to V o /V o nom. Single-output models with synchronous rectifier (G): The R input is referenced to the secondary side of the converter. Adjustment of the output voltage is possible by means of an external resistor connected between the R pin and either Vo+ or Vo. Note: For models with synchronous rectifier the logic for V o adjustment differs from other models with R input. Vi+ Vi 06a Vo+ Fig. Output voltage control for single-output models with synchronous rectifier. Table 8: V o versus V ext approximate values V o nom Typ. values of R ext Typ. values of R ext [V] V o [% of V o nom ] R ext [kω] V o [% of V o nom ] R ext [kω] All other models fitted with R-input: The R input is referenced to the secondary side of the converter. Adjustment of the output voltage is possible by means of either an external resistor or a voltage source. R Vo R ext R ext a) Adjustment by means of an external resistor R ext. Depending upon the value of the required output voltage, the resistor shall be connected: either: Between the R pin and Vo to achieve an output voltage adjustment range of V o 80 to 00 % of V o nom. V R o ext kω V o nom V o or: Between the R pin and Vo+ to achieve an output voltage range of V o 00 to 0% of V o nom. (V o.v) R ext kω. V (V o /V o nom ) b) Adjustment by means of an external voltage V ext between Vo and R pin. The control voltage range is.96 to.6 V and allows for adjustment in the range of V o 80 to 0% of V o nom. V o. V V ext V o nom Attempting to adjust the output below this range will cause the converter to shut down (hiccup mode). Note: Applying an external control voltage >.7 V may damage the converter. Fig. Output voltage control for single-output models, -00-models, and double-output models by means of the R input. Double-output models with Trim input: The Trim input is referenced to the primary side. The figure below shows the topology. Adjustment is possible trough either an external resistor or an external voltage source V ext. + Vi+ Vi V ref =. V V ext + Vi+ Trim R ext Vi kω Control logic 0609e Vo a Control circuit V ref. V Vo+ Vo Vo+ Vo Fig. 6 Output voltage control for double-output models (with Trim input) by means of the Trim input. R Vo R ext R ext + V ext Page of 9

14 a) Adjustment by means of an external resistor R ext : Programming of the output voltage by means of an external resistor R ext is possible within 00 to 0% of V o nom. R ext should be connected between the Trim pin and Vi. Connection of R ext to Vi+ may damage the converter. The table below indicates suitable resistor values for typical output voltages under nominal conditions (V i nom, I o = 0. I o nom ) with either parallel-connected outputs or equal-load conditions on both outputs. Table 9: R ext for V o > V o nom ; approximate values (V i nom, I o, = 0. I o/ nom ) V o [% V o nom ] R ext [kω] 0 to 08 (07 typically) b) Adjustment by an external voltage source V ext : For programming the output voltage in the range 7 to 0% of V o nom, a source V ext (0 to 0 V) is required, connected between the Trim pin and Vi. The table below indicates values V o versus V ext (nominal conditions V i nom, I o = 0. I o nom ), with either parallel-connected outputs or equal load conditions on both outputs. Applying a control voltage >0 V will set the converter into a hiccup mode. Direct paralleling of the Trim pins of parallel connected converters is possible. Table 0: V o versus V ext for V o = 7 to 0% V o nom ; typical values (V i nom, I o/ = 0. I o/ nom ) V o [% V o nom ] V ext [V] Electromagnetic Compatibility (EMC) A suppressor diode together with an input filter forms an effective protection against high input transient voltages, which typically occur in many installations, but especially in batterydriven mobile applications. Electromagnetic Immunity Table : Immunity type tests Phenomenon Standard Class Coupling Value Waveform Source Test In Perf. Level mode applied Imped. procedure oper. crit. Electrostatic IEC/EN contact discharge 6000 V p /0 ns 0 Ω 0 positive and yes A discharge to case pf 0 negative R-pin open air discharge 8000 V p discharges Electromagnetic IEC / EN x antenna 0 V/m AM 80%, khz n.a. 80 to 000 MHz yes A field antenna 0 V/m 80% AM, khz n.a MHz yes A 0 Vm MHz V/m MHz V/m MHz Electrical fast IEC / EN 7 direct +i/ i 000 V p bursts of /0 ns, 0 Ω 60 s positive yes A transients/burst khz over ms, 60 s negative burst period: 00 transients per ms coupling mode Surges IEC/EN +i/ i 000 V p./0 µs Ω pos. and neg. yes A µf surges RF conducted IEC/EN 8 +i/ i 0 VAC 8 AM modulated 0 Ω 0. to 80 MHz yes A immunity VAC 9 80%, khz External components required; see Fig. 6 and table 6. Exceeds the railway standard EN 0--:06, table.. i = input A = normal operation, no deviation from specs., B = temporary deviation from specs possible. Corresponds to the railway standard EN 0--:06, table. Corresponds to the railway standard EN 0--:06, table.. 6 Corresponds to the railway standard EN 0--:06, table.. 7 Corresponds to the railway standard EN 0--:06, table.. 8 Corresponds to the railway standard EN 0--:06, table.. 9 Valid for IMS and 8IMS Page of 9

15 Conducted Emissions Compliance with EN 0, group, class A, was tested with the filter fig. 6 (values table 6). The resuts are shown in fig. 7a, b, c. Compliance with EN 0, group, class B can be performed with the filter in fig. 8. The result is shown in fig. 9. dbµv PMM 8000 PLUS Name: 0d_ Date:.0.06 Time: 6: 0IMX---8 Peak Vi+ µh JM EN 0 A 0IMXD-con-p Vi 7 µf nf 7 µf 0 nf 0IMX MHz Fig. 7a 0IMX---8: Typ. disturbance voltage (peak) at pos. input according to EN 0, measured at V i nom and I o nom. Fig. 8 Example for external circuitry to comply with EN 0, Group, Class B, conducted. This filter was designed for a 0IMX---8. All capacitors are rated to 00 V, the chokes to. A. dbµv PMM 8000 PLUS Name: 0d_ Date: Time: 09:8 0IMX---8-Peak dbµv PMM 8000 PLUS Name: 0d_ Date:.0.06 Time: : 0IMX---8 Peak 60 EN 0 B 80 EN 0 A 0 0IMXD-F IMXD-con-p MHz MHz Fig. 7b 0IMX---8: Typ. disturbance voltage (peak) at pos. input according to EN 0, measured at V i nom and I o nom. Fig. 9 Typ. disturbance voltage (peak) at input according to EN 0, group, class A, measured at V i nom and I o nom. Output leads 0. m, twisted, input filter as in fig. 8 (0IMX---8) dbµv PMM 8000 PLUS Name: 0d_ Date:.0.06 Time: 08:07 0IMY---9 Peak 80 EN 0 A IMY-D-con-p MHz Fig. 7c 0IMY---8: Typ. disturbance voltage (peak) at pos. input according to EN 0, measured at V i nom and I o nom. Page of 9

16 Immunity to Environmental Conditions Table : Mechanical and climatic stress Test Method Standard Test Conditions Status Cab Damp heat IEC/EN Temperature: 0 ± C Converter steady state MIL-STD-80D sect. 07. Relative humidity: 9 +/- % not Duration: 6 days operating Ea Shock IEC/EN Acceleration amplitude: 0 g n = 90 m/s Converter (half-sinusoidal) MIL-STD-80D sect. 6. Bump duration: ms operating Number of bumps: 8 ( each direction) Fc Vibration IEC/EN Acceleration amplitude: 0. mm (0 to 60 Hz) Converter (sinusoidal) g n = 9 m/s (60 to 000 Hz) operating Frequency ( Oct/min): 0 to 000 Hz Test duration: 7. h (. h each axis) Fda Random vibration IEC/EN Acceleration spectral density: 0.0 g n /Hz Converter wide band Frequency band: 0 to 00 Hz operating reproducibility Acceleration magnitude:.9 g n rms high Test duration: h ( h each axis) Ka Salt mist test EN 0:007, Temperature: ± C Converter sodium chloride clause..0, Duration: 6 h not (NaCl) solution class ST operating Temperatures Table : Temperature specifications Valid for air pressure of 800 to 00 hpa (800 to 00 mbar) Temperature -9-8 Unit Characteristics Conditions min max min max T A Ambient temperature Operational 0 7 0, 8 C T C Case temperature 0 9 0, 0 T S Storage temperature Non operational 8 8 See Thermal Considerations Start-up at C, except models with synchronous rectifier SR C for all models with synchronous rectifier SR with Revision lower than BA. Reliability Table : MTBF Model Standard Ground Benign Ground Fixed Ground Mobile Unit T C = 0 C T C = 0 C T C = 70 C T C = 0 C 0IMX---8 MIL-HDBK-7F h 0IMX---8 Bellcore IMS MIL-HDBK-7F IMY-0-8R MIL-HDBK-7F Bellcore Page 6 of 9

17 Mechanical Data Dimensions in mm (inches). Tolerances ±0. mm, unless otherwise noted. European Projection Measuring point of case temperature T C 0. ±0. (0.") 0.8 (0.0").7 (.8") for holes with S090d.6 mm 0.6 (.6") x.08 (0."). (0.") bottom view 7.08 (0.") 6.8 (.") (0.9") 7 (.8") 0.8 (") Fixing holes for M or KA self-tapping screws Fig. 0 Case IMX, IMS, IMY Material: Fortron 0L6 Weight: g 0. ±0. (0.").7 (.8") S900d 0.8 (0.0") for holes with.6 mm x.08 (0."). (0.") bottom view 7 6 x.08 (0.") 8.8 (.") (0.9") 8. (.9") Fig. Open frame (option Z) Weight: 6 g Page 7 of 9

18 Safety and Installation Instructions Pin allocation Fig. Footprint Table : Pin allocation Pin Standard and Option Z single double -00- Vi+ Vi+ Vi+ Vi Vi Vi - Trim n.c. SD SD SD Vo+ Vo+ - Vo Go Vo+ Vo+ Vo+ Vo Vo Go 7 R n.c. R Installation Instructions Bottom view 000 Installation 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. The converter must be connected to a secondary circuit. Do not open the converter. Ensure that a converter failure (e.g., by an internal short-circuit) does not result in a hazardous condition. Input Fuse To prevent excessive current flowing through the input supply lines in case of a malfunction an external fuse should be installed in a non-earthed input supply line; see table. Standards and Approvals The converters are approved according to the latest edition of EN/IEC and UL/CSA IMY models are fitted with a CE mark. 7 The converters have been evaluated for: Building in Supplementary insulation input to output, based on their maximum input voltage (IMX, IMS) Reinforced insulation input to output, based on their maximum input voltage (IMY models) Pollution degree environment (not option Z) Connecting the input to a secondary circuit subject to a maximum transient rating of 00 V (IMX, IMS) Connecting the input to a secondary circuit subject to a maximum transient rating of 00 V (IMY) The converters are subject to manufacturing surveillance in accordance with the above mentioned UL standards and with ISO900:008. 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 of the converters is IP 0, except openframe models (option Z). In order to avoid possible damage, any penetration of cleaning fluids should be prevented, since the power supplies are not hermetical sealed. However, open-frame models (option Z) leave the factory unlacquered; they may be lacquered by the customer, for instance together with the mother board. Cleaning liquids are not permitted except washing at room temperature with isopropyl alcohol. If necessary, the mother board must be cleaned, before fitting the open-frame converter. Note: Cleaning liquids may damage the adhesive joints of the ferrite cores. Isolation The electric strength test is performed in the factory as routine test in accordance with EN 0 and IEC/EN The Company will not honor any warranty claims resulting from incorrectly executed electric strength field tests. Table 6: Electric strength test voltages Characteristic Input to output Output to Unit IMS IMX IMY output Factory test s kvac Equivalent DC voltage (.7) (.) (.) 0. kvdc Insulation resistance >00 >00 >00 - MΩ at 00 VDC Partial discharge Consult the Company - kv extinction voltage. kvac according to IEC 6090, sect. 6., Telecom equipment; type test with. kvac / 60 s (IEE 80.). IMX units produced before 0 were tested only with. kvac. The test voltage between outputs is not applied as routine test. Page 8 of 9

19 Description of Options Table 7: Survey of options Option Function of option Characteristic -9 Temperature range, NFND See table Temperatures specifications i Inhibit Replaces the shutdown function with inverted logic Z Open frame See Mechanical Data Option -9 versus -8 IMX and IMY models with -9 (not for new designs) have a limited temperature range. Standard models with suffix -8 are rated up to T A = 8 C; see table Temperature specifications. Option i: Inhibit Replaces the shut-down function with inverted logic. The output(s) of the converter may be enabled or disabled by means of a logic signal (TTL, CMOS, etc.) applied to the inhibit pin. No output voltage overshoot will occur, when the converter is turned on. If the inhibit function is not required, the inhibit pin should be connected to Vi to enable the output (active low logic, fail safe). Voltage on pin i: Converter operating: 0 V to 0.8 V Converter inhibited:. V to V i max (<7 V) or pin i left open-circuit. i Vi Option Z Open frame and not lacquered. This option can be chosen for mounting onto a mother board, which is subject to be lacquered. See Protection Degree and Cleaning Liquids (page 8). Fig. If the inhibit function is not used, the inhibit pin should be connected to Vi. Vi Option G or -G Products RoHS-compliant for all 6 substances. See RoHS- Compliant Models (page ) for the correct denotation. Accessories Supports are available for chassis mounting CMBIMX (HZZ0066) and for DIN-rail mounting DMBIMX (HZZ006). They exhibit the connectors and allow for placing different external components. For details see our Mounting Supports Data Sheet BCD0007 on our website. Fig. DIN-rail mounting support DMBIMX (HZZ006) NUCLEAR AND MEDICAL APPLICATIONS - These products are not designed or intended for use as critical components in life support systems, equipment used in hazardous environments, or nuclear control systems. TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the date manufactured. Specifications are subject to change without notice. Copyright 08, Bel Power Solutions Inc. All rights reserved. belfuse.com/power-solutions Page 9 of 9