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a a e e v v 2 2 4 4 v v & & 4 4 8 8 v v i i n n p p u u t t s s e e r r i i e e s s t t e e c c h h n n i i c c a a l l r r e e f f e e r r e e n n c c e e n n o o t t e e s s single and dual output series single and dual output series 25 w 25 w att dc-dc converter att dc-dc converter usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com
page 1 aev technical description the aev series of switching dc-dc converters is one of the most cost effective options available in com- ponent power. the aev uses an industry standard package size and pinout configuration, and provides control and trim functions. aev converters come in 24v or 48v input versions, each of which uses a 2:1 input range. outputs are isolat- ed from the input and the convert- ers are capable of providing up to 25 watts of output power. at startup, input current passes through an input filter designed to help meet cispr 22 level a radiat- ed emissions, and bellcore gr1089 conducted emissions. a fuse should be used in line with the input. the aev converters are pulse width modulated (pwm) and operate at a nominal fixed frequency of 330 khz. feedback to the pwm controller uses an opto-isolator, maintaining complete isolation between primary and secondary. caution should be taken to avoid ground loops when connecting the converter to ground. output power is typically available within 10 ms after application of input power. aev series electrical input input the +vin and -vin pins are located as shown in the mechanical drawings at the end of this man- ual. aev converters have a 2:1 input voltage range; 24 vin converters can accept 18-36 vdc, and 48 vin converters can accept 36-72 vdc. care should be taken to avoid applying reverse polarity to the converters which can damage the converter. note: cnt must be tied to -vin for operation. fig. 1. aev single output block diagram note: cnt must be tied to -vin for operation. fig. 2. aev dual output block diagram usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com a a a a e e e e v v v v 2 2 2 2 4 4 4 4 v v v v & & & & 4 4 4 4 8 8 8 8 v v v v i i i i n n n n p p p p u u u u t t t t s s s s e e e e r r r r i i i i e e e e s s s s d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s s s s s i i i i n n n n g g g g l l l l e e e e a a a a n n n n d d d d d d d d u u u u a a a a l l l l o o o o u u u u t t t t p p p p u u u u t t t t , , , , 2 2 2 2 5 5 5 5 w w w w a a a a t t t t t t t t d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s
a a a a e e e e v v v v 2 2 2 2 4 4 4 4 v v v v & & & & 4 4 4 4 8 8 8 8 v v v v i i i i n n n n p p p p u u u u t t t t s s s s e e e e r r r r i i i i e e e e s s s s d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s s s s s i i i i n n n n g g g g l l l l e e e e a a a a n n n n d d d d d d d d u u u u a a a a l l l l o o o o u u u u t t t t p p p p u u u u t t t t , , , , 2 2 2 2 5 5 5 5 w w w w a a a a t t t t t t t t d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s page 2 usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com input reverse voltage protection under installation and cabling conditions where reverse polarity across the input may occur, reverse polarity protection is recommended. protection can easily be provided as shown in figure 3. in both cases the diode used is rated for 4a/100v. placing the diode across the inputs rather than in-line with the input offers an advantage in that the diode only conducts in a reverse polarity condition, which increases circuit efficiency and thermal performance. input undervoltage protection the aev is protected against undervoltage on the input. if the input voltage should drop below the acceptable range, the converter will shut down. it will automatically restart when the undervoltage condition is removed. input overvoltage protection the aev is protected against overvoltage on the input. if the input voltage should rise above the acceptable range, the converter will shut down. it will automatically restart when the undervoltage condition is removed. input filter input filters are included in the converters to help achieve standard system emissions certi- fications. some users however, may find that additional input filtering is necessary. the aev series has an internal switching frequency of 330 khz so a high frequency capacitor mount- ed close to the input terminals produces the best results. to reduce reflected noise, a capacitor can be added across the input as shown in figure 4, forming a filter. a 47 f/100v electrolytic capacitor is recommended for c1. for conditions where emi is a concern, a dif- ferent input filter can be used. figure 5 shows an input filter designed to reduce emi effects. l1 is a 1mh common mode inductor, c 1 is a 47 f/100v electrolytic capacitor, and c 2 is a 1 f/100v metal film or ceramic high frequency capacitor, and c y1 and c y2 are each 4700 pf high frequency ceramic capacitors. +vin -vin c1 +v in -v in c 1 c 2 c y1 c y2 l 1 +vin -vin fig. 4. ripple rejection input filter fig. 5. emi reduction input filter +vin -vin fig. 3. reverse polarity protection circuits
a a a a e e e e v v v v 2 2 2 2 4 4 4 4 v v v v & & & & 4 4 4 4 8 8 8 8 v v v v i i i i n n n n p p p p u u u u t t t t s s s s e e e e r r r r i i i i e e e e s s s s d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s s s s s i i i i n n n n g g g g l l l l e e e e a a a a n n n n d d d d d d d d u u u u a a a a l l l l o o o o u u u u t t t t p p p p u u u u t t t t , , , , 2 2 2 2 5 5 5 5 w w w w a a a a t t t t t t t t d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s page 3 usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com when a filter inductor is connected in series with the power converter input, an input capacitor c 1 should be added. an input capacitor c 1 should also be used when the input wiring is long, since the wiring can act as an inductor. failure to use an input capacitor under these conditions can pro- duce large input voltage spikes and an unstable output. input fusing standard safety agency regulations require input fusing. recommended fuse ratings for the aev series are shown in table 1. aev series electrical output output connections (+vout, -vout) outputs on the aev series are isolated from the input and can therefore be left to float or can be grounded. pin connections for +vout, and -vout are shown in the mechanical drawings at the end of this manual. sharing power between dual outputs each output of a dual output aev is limited to one half of the total power capacity of the converter. for example, if the positive out- put of an aev01cc48 only draws 5w, the negative output will still be limited to 12.5w. voltage regulation performance is best when the outputs are balanced. figure 6 shows typical cross regulation for a 15 volt output. overcurrent protection (ocp) aev series dc/dc converters feature fold- back current limiting as part of their overcurrent protection (ocp) circuits. when output current exceeds 115 to 150% of rated current, such as during a short cir- cuit condition, the output will shutdown immediately, and can tolerate short circuit conditions indefinitely. when the overcur- rent condition is removed, the converter will automatically restart. table 1. fuse ratings aev02b24 AEV02C24 fig. 7. overcurrent performance nominal input fuse 24v 5a 48v 2.5a aev01cc24 aev01cc48 aev01cc24 aev01cc48 fig. 6. cross regulation
a a a a e e e e v v v v 2 2 2 2 4 4 4 4 v v v v & & & & 4 4 4 4 8 8 8 8 v v v v i i i i n n n n p p p p u u u u t t t t s s s s e e e e r r r r i i i i e e e e s s s s d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s s s s s i i i i n n n n g g g g l l l l e e e e a a a a n n n n d d d d d d d d u u u u a a a a l l l l o o o o u u u u t t t t p p p p u u u u t t t t , , , , 2 2 2 2 5 5 5 5 w w w w a a a a t t t t t t t t d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s page 4 usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com overvoltage protection (ovp) the aev series provides overvoltage protection on the output, which will shut the output off if the voltage exceeds 120 to 140% of the nominal output voltage. if the ovp circuit activates, power to the converter should be cycled to turn the converter back on. trim the output voltage of the aev series can be trimmed using the trim pin provided. applying a volt- age to the trim pin through a voltage divider from the output will cause the output to increase or decrease by up to 10%. trimming up by more than 10% of the nominal output may activate the ovp circuit or damage the converter. trimming down more than 10% can cause improper regu- lation. when trimming a dual output converter, both outputs trim simultaneously. fixed and variable trim circuits are shown in figures 7 to 9. note that resistor values will change depending on the converter used. for trim ranges not listed, contact the factory for assistance. control function the aev provides a control function allowing the user to turn the output on and off using an exter- nal circuit. applying a voltage greater than 7v to the cnt pin will disable the output, while apply- ing a voltage less than 3.5v will enable it. the performance of the converter between these two points will depend on the individual converter and whether the control voltage is increasing or +v out -v out trim load r 1 r 2 r t = 100k ? all resistor values in k ? 10% 5% r1 r2 r1 r2 3.3v out 5v out 12v out 47 12 86 22 15v out 68 12 12022 single output converters 10% 5% r1 r2 r1 r2 5v out 33 12 63 22 12v out 120 11 20020 15v out 150 10 27020 dual output converters +v out -v out trim load r 1 2.54 3.3v out: r 1 = y - 5.08 5.6 5v out: r 1 = y - 8.67 7.49 12v out: r 1 = y - 10.66 10.38 15v out: r 1 = y - 13.65 where y = v e - v o v e single output converters 5.6 5v out: r 1 = y - 9.67 19.18 12v out: r 1 = y - 23.61 25.11 15v out: r 1 = y - 29.59 where y = v e - v o v e dual output converters all resistor values in k ? fig. 10. fixed trim down fig. 8. variable trim +v out -v out trim load r 2 1.55 3.3v out: r 1 = y - 2.2 1.87 5v out: r 1 = y - 1 1.97 12v out: r 1 = y - 1 2.08 15v out: r 1 = y - 2.2 where y = v o - v e v e single output converters 2.08 5v out: r 1 = y - 2.2 2.23 12v out: r 1 = y - 2.2 2.28 15v out: r 1 = y - 2.2 where y = v o - v e v e dual output converters all resistor values in k ? fig. 9. fixed trim up
a a a a e e e e v v v v 2 2 2 2 4 4 4 4 v v v v & & & & 4 4 4 4 8 8 8 8 v v v v i i i i n n n n p p p p u u u u t t t t s s s s e e e e r r r r i i i i e e e e s s s s d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s s s s s i i i i n n n n g g g g l l l l e e e e a a a a n n n n d d d d d d d d u u u u a a a a l l l l o o o o u u u u t t t t p p p p u u u u t t t t , , , , 2 2 2 2 5 5 5 5 w w w w a a a a t t t t t t t t d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s page 5 usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com decreasing. the cnt pin must be connected to -vin for operation. if the cnt pin is left open, the converter will default to ?control off? and the output will not turn on. the maximum voltage that can be applied to the control pin is 80 volts. output filters when the load is sensitive to ripple and noise, an output filter can be added to minimize the effects. a simple output filter to reduce output ripple and noise can be made by connecting a capacitor across the output as shown in figure 15. the rec- ommended value for the output capacitor is 470 f / 10v for sin- gle outputs up to 5 volts, 100 f / 25v for 12 and 15 volt single outputs, and 220 f / 25v on each output for dual output converters. extra care should be taken when long leads or traces are used to provide power to the load. long lead lengths increase the chance for noise to appear on the lines. under these conditions c2 can be added across the load as shown in figure 16. the recommended component for c2 is 1 f ceramic capacitor. decoupling noise on the power distribution system is not always created by the converter. high speed analog or digital loads with dynamic power demands can cause noise to cross the power inductor back onto the input lines. noise can be reduced by decoupling the load. in most cases, connecting a 10 f tantalum capacitor in parallel with a 0.1 f ceramic capacitor across the load will decouple it. the capacitors should be connected as close to the load as possible. series operation when converters are connected in series to increase the output voltage, diodes should be added as shown in figure 16. choose low forward voltage drop diodes, such as shottky diodes. the reverse voltage of the diode should be greater than the output voltage, and the diode?s turn-on current should be greater than the series load current. the maximum operating output current of the series connection should not be greater than the maxi- mum output current of any single converter. +v out -v out load c 1 fig. 15. output ripple filter +v out -v out load c 1 c 2 fig. 16. output ripple filter for a distant load -v in cnt fig. 11. simple control circuit -v in cnt fig. 12. transistor control circuit -v in cnt fig. 13. isolated control circuit -v in cnt fig. 14. relay control circuit +v out -v out +v in -v in +v out -v out +v in -v in load fig. 17. series operation
a a a a e e e e v v v v 2 2 2 2 4 4 4 4 v v v v & & & & 4 4 4 4 8 8 8 8 v v v v i i i i n n n n p p p p u u u u t t t t s s s s e e e e r r r r i i i i e e e e s s s s d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s s s s s i i i i n n n n g g g g l l l l e e e e a a a a n n n n d d d d d d d d u u u u a a a a l l l l o o o o u u u u t t t t p p p p u u u u t t t t , , , , 2 2 2 2 5 5 5 5 w w w w a a a a t t t t t t t t d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s page 6 usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com parallel operation under most circumstances, paralleling converters is not desirable. when more power is required, a higher power converter will usually use less space and will cost less than using two lower power converters. one common exception is when redundancy or graceful degradation is required. in this case, multiple converters should be used. please see the discussion on redundant operation in the design considerations section for further information. design considerations parallel power distribution figure 18 shows a typical parallel power distribution design. such designs, sometimes called daisy chains, can be used for very low output currents, but are not normally recommended. the voltage across loads far from the source can vary greatly depending on the ir drops along the leads and changes in the loads closer to the source. dynamic load conditions increase the potential problems. radial power distribution radial power distribution is the preferred method of pro- viding power to the load. figure 19 shows how individual loads are connected directly to the power source. this arrangement requires additional power leads, but it avoids the voltage variation problems associated with the paral- lel power distribution technique. mixed distribution in the real world a combination of parallel and radial power distribution is often used. dynamic and high cur- rent loads are connected using a radial design, while sta- tic and low current loads can be connected in parallel. this combined approach minimizes the drawbacks of a parallel design when a purely radial design is not feasible. redundant operation a common requirement in high reliability systems is to provide redundant power supplies. the easiest way to do this is to place two converters in parallel, providing fault tolerance but not load sharing. oring diodes should be used to ensure that failure of one converter will not cause failure of the second. figure 21 shows such an arrangement. upon application of power, one of the con- verters will provide a slightly higher output voltage and will support the full load demand. the sec- load 1 load 2 load 3 +vout -vout r l1 r l2 r l3 r g1 r g2 r g3 r l = lead resistance r g = ground lead resistance fig. 19. radial distribution load 1 load 2 load 3 +vout -vout r l1 r l2 r l3 r g1 r g2 r g3 i 1 + i 2 + i 3 i 2 + i 3 i 3 r l = lead resistance r g = ground lead resistance fig. 18. parallel power distribution load 1 load 2 load 3 +vout -vout r l1 r l2 r l3 r g1 r g2 r g3 r l = lead resistance r g = ground lead resistance load 4 r l4 r g4 fig. 20. mixed distribution
a a a a e e e e v v v v 2 2 2 2 4 4 4 4 v v v v & & & & 4 4 4 4 8 8 8 8 v v v v i i i i n n n n p p p p u u u u t t t t s s s s e e e e r r r r i i i i e e e e s s s s d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s s s s s i i i i n n n n g g g g l l l l e e e e a a a a n n n n d d d d d d d d u u u u a a a a l l l l o o o o u u u u t t t t p p p p u u u u t t t t , , , , 2 2 2 2 5 5 5 5 w w w w a a a a t t t t t t t t d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s page 7 usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com ond converter will see a zero load condition and will ?idle?. if the first converter should fail, the second con- verter will support the full load. when designing redun- dant converter circuits, shottky diodes should be used to minimize the forward voltage drop. the voltage drop across the shottky diodes must also be considered when determining load voltage requirements. ground loops ground loops occur when different circuits are given multiple paths to common or earth ground, as shown in figure 22. multiple ground points can have slightly different potential and cause current flow through the circuit from one point to another. this can result in additional noise in all the circuits. to eliminate the problem, circuits should be designed with a single ground connec- tion as shown in figure 23. hot plugging when a power source or load is inserted or removed from a system while the system is opera- tional, it is called ?hot plugging?. designing a system for hot plug operation is challenging and sev- eral issues should be considered. the input to a converter is largely capacitive and it will draw a high inrush current when power is first applied. this will place a large demand on the power bus which must be designed to handle the current spike. it also presents the risk of arcing when the converter is connected. a common way to minimize inrush current is to disable the output until after the inrush current has subsided. disabling the output eliminates power draw from the converter and reduces capacitor charge times. the output only has to be disabled for a very short time and can usually be done through mechanical connections. making the input connections physically longer lets them con- nect first and initiate the inrush current. when the shorter output or output enable connections are made, the inrush has already subsided. +vout -vout load load r line r line r line r line r line fig. 23. single point ground +vout -vout load load r line r line r line r line r line r line ground loop fig. 22 ground loops +v out -v out +v out -v out load fig 21. redundant operation
a a a a e e e e v v v v 2 2 2 2 4 4 4 4 v v v v & & & & 4 4 4 4 8 8 8 8 v v v v i i i i n n n n p p p p u u u u t t t t s s s s e e e e r r r r i i i i e e e e s s s s d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s s s s s i i i i n n n n g g g g l l l l e e e e a a a a n n n n d d d d d d d d u u u u a a a a l l l l o o o o u u u u t t t t p p p p u u u u t t t t , , , , 2 2 2 2 5 5 5 5 w w w w a a a a t t t t t t t t d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s page 8 usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com aev series mechanical considerations thermal derating aev single and dual output converters are rated for full power up to a case temperature of 90c. under typical conditions this equates to an ambi- ent temperature of 70c. for operation above ambient air temperatures of 70c, output power must be derated as shown in figure 24, or airflow over the converter must be provided. when air- flow is provided, the case temperature should be used to determine maximum temperature limits. the minimum operating temperature for the aev is -25c. operation at temperatures as low as - 40c is possible, but output performance below -25c is not specified. installation aev series converters can be mounted in any orientation, but care should be taken to allow for free airflow. common placement techniques put heat sources such as power components at the end of the airflow path or provide separate airflow paths. this arrangement keeps other system equipment cooler and increases component life spans. soldering aev series converters are compatible with standard wave soldering techniques. when wave soldering, the converter pins should be preheated for 20-30 seconds at 110c, and wave sol- dered at 260c for less than 15 seconds. when hand soldering, the iron temperature should be maintained at 450c and applied to the converter pins for less than 5 seconds. longer exposure can cause internal damage to the con- verter. cleaning can be performed with cleaning solvent ipa or with water. 0 20 40 60 80 100 70 60 50 40 30 20 10 0 -10 -20 ambient temperature in degrees c percent maximum output power safe operating area 80 90 maximum case temperature fig. 24. temperature derating
usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com a a a a e e e e v v v v 2 2 2 2 4 4 4 4 v v v v & & & & 4 4 4 4 8 8 8 8 v v v v i i i i n n n n p p p p u u u u t t t t s s s s e e e e r r r r i i i i e e e e s s s s d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s s s s s i i i i n n n n g g g g l l l l e e e e a a a a n n n n d d d d d d d d u u u u a a a a l l l l o o o o u u u u t t t t p p p p u u u u t t t t , , , , 2 2 2 2 5 5 5 5 w w w w a a a a t t t t t t t t d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s page 9 aev single and dual outputs 5.08 (0.20) 50.0 (1.97) 5.08 (0.20) 15.24 (0.60) 55.88 (2.20) 65.0 (2.56) 5.44 (0.21) 3.81 (0.15) 15.24 (0.60) 5.08 (0.20) +vo -vo trim +vin -vin cnt electrical specs nominal output output short circuit overvoltage input voltage current current ripple noise efficiency lockout (v) (v) (a) (a) (mv rms) (mv pp) (%) (v) typ typ max typ max min typ min max aev05f24 24 3.3 5 6.7 10 20 50 75 78 80 3.96 5.0 aev04a24 24 5 4 5.3 10 20 50 75 82 83 5.75 7.0 aev02b24 24 12 2.1 2.9 10 20 75 100 83 85 13.8 15.5 AEV02C24 24 15 1.7 2.6 10 20 75 100 83 86 17.0 19.5 aev05f48 48 3.3 5 6.7 10 20 50 75 78 80 3.96 5.0 aev04a48 48 5 4 5.3 10 20 50 75 82 83 5.75 7.0 aev02b48 48 12 2.1 2.9 10 20 75 100 84 86 13.8 15.5 aev02c48 48 15 1.7 2.6 10 20 75 100 84 86 17.0 19.5 aev02aa24 24 5 2 6.6 10 20 50 75 82 83 12 14 aev01bb24 24 12 1.05 3.4 10 20 75 100 84 86 27 33 aev01cc24 24 15 0.85 3.2 10 20 75 100 84 86 33.5 42 aev02aa48 48 5 2 6.2 10 20 50 75 82 83 12 14 aev01bb48 48 12 1.05 2.9 10 20 75 100 84 86 27 33 aev01cc48 48 15 0.85 2.7 10 20 75 100 84 86 33.5 42 5.08 (0.20) 50.0 (1.97) 5.08 (0.20) 15.24 (0.60) 55.88 (2.20) 65.0 (2.56) 5.44 (0.21) 3.81 (0.15) 7.62 (0.30) 5.08 (0.20) 7.62 (0.30) +vin -vin cnt +vo com -vo trim 6.6 (0.26) 6- 1.0 (0.039) standoff typ, 4 places 2.4 (0.09) 3.0 (0.12) 0.5 (0.02) 8.5 (0.33) 6.6 (0.26) 7- 1.0 (0.039) standoff typ, 4 places 2.4 (0.09) 3.0 (0.12) 0.5 (0.02) 8.5 (0.33)
usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com a a a a e e e e v v v v 2 2 2 2 4 4 4 4 v v v v & & & & 4 4 4 4 8 8 8 8 v v v v i i i i n n n n p p p p u u u u t t t t s s s s e e e e r r r r i i i i e e e e s s s s d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s s s s s i i i i n n n n g g g g l l l l e e e e a a a a n n n n d d d d d d d d u u u u a a a a l l l l o o o o u u u u t t t t p p p p u u u u t t t t , , , , 2 2 2 2 5 5 5 5 w w w w a a a a t t t t t t t t d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s page 10 common specs input min nom max units notes input voltage 18 24 36 vdc 50 vdc max < 100 ms 36 48 72 vdc 100 vdc max < 100 ms isolation input-output 500 vdc input-case 500 vdc output-case 500 vdc i/o isolation resistance 300 m ? control voltage 80 vdc absolute maximum control logic logic low = on 3.5 vdc logic high = off 7 vdc control current 0.6 ma undervoltage shutdown 24 vin 14 16 18 vdc 48 vin 30 33 36 vdc overvoltage shutdown 24 vin 36 38 42 vdc 48 vin 72 76 82 vdc output power 25 w voltage setpoint accuracy 1 %vo line regulation 0.05 0.1 %vo load regulation 0.35 0.5 %vo trim range -10 +10 %vo both outputs trim together. dynamic response 50-75% load 4 %vo t=25c, di/dt=1a/10s 200 s t=25c, di/dt=1a/10s 50-25% load 4 %vo t=25c, di/dt=1a/10s 200 s t=25c, di/dt=1a/10s temperature regulation 0.02 %v o/c general mtbf 2,030 k hrs bellcore tr332, 25c case temperature -25 90 c storage temperature -40 105 c switching frequency 330 khz pin solder temperature 260 c wave solder < 15 s hand soldering time 5 s iron temperature 450c weight 63 grams
usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com a a a a e e e e v v v v 2 2 2 2 4 4 4 4 v v v v & & & & 4 4 4 4 8 8 8 8 v v v v i i i i n n n n p p p p u u u u t t t t s s s s e e e e r r r r i i i i e e e e s s s s d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s s s s s i i i i n n n n g g g g l l l l e e e e a a a a n n n n d d d d d d d d u u u u a a a a l l l l o o o o u u u u t t t t p p p p u u u u t t t t , , , , 2 2 2 2 5 5 5 5 w w w w a a a a t t t t t t t t d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s page 11 aev05f24 aev04a24 aev02b24 AEV02C24 aev05f24 aev04a24 aev02b24 AEV02C24 aev single output typical startup delay from cnt on aev single output typical shutdown delay from cnt off aev single performance curves aev05f48 aev04a48 aev02b48 aev02c48 aev05f48 aev04a48 aev02b48 aev02c48
usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com a a a a e e e e v v v v 2 2 2 2 4 4 4 4 v v v v & & & & 4 4 4 4 8 8 8 8 v v v v i i i i n n n n p p p p u u u u t t t t s s s s e e e e r r r r i i i i e e e e s s s s d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s s s s s i i i i n n n n g g g g l l l l e e e e a a a a n n n n d d d d d d d d u u u u a a a a l l l l o o o o u u u u t t t t p p p p u u u u t t t t , , , , 2 2 2 2 5 5 5 5 w w w w a a a a t t t t t t t t d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s page 12 aev05f24 aev04a24 aev02b24 AEV02C24 typical step up load response from 50% to 75% load. aev04a48 typical step down load response from 50% to 25% load. aev04a48 aev single performance curves aev02b48 aev02c48 aev05f48 aev04a48
usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com a a a a e e e e v v v v 2 2 2 2 4 4 4 4 v v v v & & & & 4 4 4 4 8 8 8 8 v v v v i i i i n n n n p p p p u u u u t t t t s s s s e e e e r r r r i i i i e e e e s s s s d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s s s s s i i i i n n n n g g g g l l l l e e e e a a a a n n n n d d d d d d d d u u u u a a a a l l l l o o o o u u u u t t t t p p p p u u u u t t t t , , , , 2 2 2 2 5 5 5 5 w w w w a a a a t t t t t t t t d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s page 13 0 10 20 30 40 50 60 70 80 90 0 0.5 1 1.5 2 2.5 output current (amps) efficiency (%) aev02aa24 aev01bb24 aev01cc24 aev02aa24 aev01bb24 aev01cc24 aev dual output typical startup delay from cnt on aev dual output typical shutdown delay from cnt off aev dual performance curves aev02aa48 aev01bb48 aev01cc48 0 10 20 30 40 50 60 70 80 90 0 0.5 1 1.5 2 2.5 output current (amps) efficiency (%) aev02aa48 aev01bb48 aev01cc48
usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com a a a a e e e e v v v v 2 2 2 2 4 4 4 4 v v v v & & & & 4 4 4 4 8 8 8 8 v v v v i i i i n n n n p p p p u u u u t t t t s s s s e e e e r r r r i i i i e e e e s s s s d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s s s s s i i i i n n n n g g g g l l l l e e e e a a a a n n n n d d d d d d d d u u u u a a a a l l l l o o o o u u u u t t t t p p p p u u u u t t t t , , , , 2 2 2 2 5 5 5 5 w w w w a a a a t t t t t t t t d d d d c c c c - - d d d d c c c c c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s page 14 aev02aa24 aev02aa48 aev02aa24 aev02aa48 aev01bb24 aev01bb48 aev01bb24 aev01bb48 aev01cc24 aev01cc48 aev01cc24 aev01cc48 aev dual performance curves aev01bb24 aev01cc24 aev02aa24 aev02aa48

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