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technical reference notes aeo40x48 / al o40x48 series (single output 8 th brick) model: aeo40x48 / alo40x48 series sheet 1 of 18 january 13, 2005 - revision a2 (preliminary) aeo40x48 / alo40x48 single output 8 th brick: baseplate or open - frame module the aeo40x48 / alo40x48 series is astec?s high current 8 th brick industry standard offering. operating from an input voltage range of 36v to 75v, the series provides 7 configured outputs starting from 1.2v all the way up to 12v. it delivers up to 40a max current for 1.8v and lower at impressive levels of efficiency. it provides tight regulation and exhibits clean and monotonic output start up characteristics. the aeo_alo series co mes with industry standard features such as input uvlo; non - latching ocp, ovp and otp; output trim; differential remote sense pins. both baseplate (aeo) and open frame (alo) construction are available as well as th or smt termination. with its wide operati ng temperature range of - 40c to 85c ambient, the converters are deployable into almost any environment. special features industry standard 8 th brick footprint baseplate or open frame construction low ripple and noise regulation to zero load high capacitive load start - up fixed switching frequency industry standard fea tures: input uvlo; enable; non - latching ovp, ocp and otp; output trim, differential remote sense meets basic insulation environmental specifications - 40oc to 85oc operating temperature - 40oc to 125oc storage temperature mtbf > 1 million hours electrical parameters input input range 3 6 - 75 vdc input surge 100v / 100ms control enable ttl compatible (positive or negative logic enable options) output load current up to 40a max (v o 1.8v) line/load regulation < 1% v o ripple and noise 15mv p - p typical at 1.8v output voltage adjust range 10% v o transient response 2% typical deviation 50% to 75% load change 20 m s settling time (typ) remote sense +10%v o over current 120% max protection over voltage 130% max protection over temperature 110 c protection safety ul + cul 60950, recogn ized en60950 through tuv - ps
technical reference notes aeo40x48 / al o40x48 series (single output 8 th brick) model: aeo40x48 / alo40x48 series sheet 2 of 18 january 13, 2005 - revision a2 (preliminary) electrical specifications absolute maximum ratings stresses in excess of the absolute maximum ratings can cause perm anent damage to the converter. functional operation of the device is converter is not implied at these or any other conditions in excess of those given in the operational section of the specs. exposure to absolute maximum ratings for extended period can ad versely affect device reliability. parameter device symbol min typical max unit input voltage continuous transient (100ms) all vin vin trans - 0.3 - - - 75 100 vdc i/o isolation input - to - output all - 1500 - - vdc operating temperature 1 all t a - 40 - 85 oc storage temperature all t stg - 55 - 125 oc operating humidity all - 10 - 85 % max voltage at enable pin all - 0.6 - 25 vdc max output power b (12v0) p o,max - - 120.0 w a (5v0) - - 100.0 f (3v3) - - 99.0 g (2v5) - - 88.0 y (1v8) - - 72.0 m (1v5) - - 60.0 k (1v2) - - 48.0 input specification parameter device symbol min typical max unit operating input voltage range all v in 36 48 75 vdc input under - voltage lock - out t_on threshold t_off threshold all 33 31 34 32 36 34 vdc max input current 2 b (12v0) a (5v0) f (3v3) g (2v5) y (1v8) m (1v5) k (1v2) iin max - - - - - - - - - - - - tba 3.5 3.5 3.3 tba tba tba a standing loss all - - 4 w input ripple current 3 all i i1 - 10 30 map - p
technical reference notes aeo40x48 / al o40x48 series (single output 8 th brick) model: aeo40x48 / alo40x48 series sheet 3 of 18 january 13, 2005 - revision a2 (preliminary) electri cal specifications ( continued) output specifications parameter device symbol min typical max unit output voltage set point v in = v in,min to v in,max i o = i o,max b (12v0) a (5v0) f (3v3) g (2v5) y (1v8) m (1v5) k (1v2) v o,set 11.80 4.90 3.25 2.45 1 .76 1.47 1.17 12.00 5.00 3.30 2.50 1.80 1.50 1.20 12.20 5.10 3.35 2.55 1.84 1.53 1.23 vdc output regulation line v in = v in,min to v in,max load v in = v in,nom i o = i o,min to i o,max temp v in = v in,nom ; i o = i o,max 4 all - - - - - - 0.1 0.1 0.5 0.2 0.5 1.0 % output ripple and noise 5 peak - to - peak i o = i o,max ; v in =v in,nom ; bwl = 20 mhz; t a =25 o c b (12v0) a (5v0) f (3v3) g (2v5) y (1v8) m (1v5) k (1v2) ) - - - - - - - - 50 40 40 20 15 15 15 120 90 75 75 50 50 50 mvp - p output cur rent 6 b (12v0) a (5v0) f (3v3) g (2v5) y (1v8) m (1v5) k (1v2) i o 0 0 0 0 0 0 0 - - - - - - - 10 20 30 35 40 40 40 a output current - limit inception v o = 90% v o,nom ; t a = 25 oc v in = v in,nom non - latching / auto - recovery b (12v0) a (5v0) f (3v3) g (2v5) y (1v8) m (1v5) k (1v2) i o,ocp 11.5 24.0 33.0 42.0 46.0 46.0 46.0 - - - - - - - 17.0 32.0 41.5 47.0 60.0 60.0 60.0 a external load capacitance i o = i o,max , resistive load esr all b (12v0) a (5v0) f (3v3) c ext - - - - 4 - - - - - 20,000 2000 1 0,000 10,000 - m f m w
technical reference notes aeo40x48 / al o40x48 series (single output 8 th brick) model: aeo40x48 / alo40x48 series sheet 4 of 18 january 13, 2005 - revision a2 (preliminary) electrical specifications ( continued) output specifications parameter device symbol min typical max unit efficiency v in = v in,nom ; i o = i o,max t a = 25 oc; b (12v) a (5.0v) f (3.3v) g (2.5v) y (1.8v) m (1.5v) k (1.2v) h h h h h h h 91 92 90 89 87 85 84 92 93 91 90 88 86 85 93 94 93 92 89 87 86 % output over voltage protection non - latching / autorecovery b (12v) a (5.0v) f (3.3v) g (2.5v) y (1.8v) m (1.5v) k (1.2v) v o,ovp 13.8 5.8 3.8 2.9 2.1 1.8 1.4 14.4 6.0 4.0 3.0 2.2 1.9 1.5 15.0 6.2 4.3 3.2 2.4 2.0 1.6 v over temperature protection autorecovery aeo alo 110 110 - - 120 120 c input to output turn - on delay v in = v in,nom, i o = i o,max all 5v, 12v - - - - - 17 20 ms enable to output turn - on delay v in = v in,nom, i o = i o,max all 5v, 12v - - - - 17 20 ms output voltage rise time 10% to 90% of v o,nom v in = v in,nom, i o = i o,max all 5v 12v - - - - - - 3.0 4.0 9.0 9.0 11.0 16.0 ms switching frequency all f sw 380 450 520 khz output voltage rem ote sensing all - - - 10 %v o output voltage trim range 7 all 90 110 %v o output voltage overshoot all - - 0 3 %vo dynamic response di/dt = 0.1 a/ m s peak deviation d i o = 50% to 75% of io max settling time vref = vo nom peak deviati on d i o = 50% to 25% of io max settling time vref = vo nom all all all all - - - - - - - - 2 20 2 20 5 100 5 100 % m s % m s
technical reference notes aeo40x48 / al o40x48 series (single output 8 th brick) model: aeo40x48 / alo40x48 series sheet 5 of 18 january 13, 2005 - revision a2 (preliminary) electrical specifications ( continued) output specifications parameter dev ice symbol min typical max unit output enable on/off open collector ttl compatible positive enable: mod - on mod - off negative enable: mod - on mod - off all all all all - - - - 2.95 - 0.50 - 0.50 2.95 - - - - 20 1.20 1.2 0 20 v v v v note: 1. derating curves for both openframe and baseplate modules are based on derated component junction temperatures of 120 o c or less where applicable. 2. an input line fuse is recommended for use (e.g. little fuse type 314 - 6a m ax, 250v min). 3. external input capacitance required. see input ripple current test measurement setup on fig 1. 4. max output current should meet the appropriate derating curves. 5. refer to fig 2 for output ripple measurement setup. 6. appropriate t hermal derating applies. 7. refer to the output trim equations provided (equation 1 and 2). safety agency / material rating / isolation parameter device safety approval 8 all ul/cul 60950, 35d edition ? recognized (pending) en 60950 through tu v (pending) material flammability rating all ul94v - 0 parameter device symbol min typical max unit input to output capacitance all - 1000 - pf input to output resistance all - tbd - ohms input to output insulation type all - basic - - note: 8. safety approval for 3.3v version is complete.
technical reference notes aeo40x48 / al o40x48 series (single output 8 th brick) model: aeo40x48 / alo40x48 series sheet 6 of 18 january 13, 2005 - revision a2 (preliminary) electrical specifications ( continued) figure 2. peak to peak output noise measurement setup. figure 1. input reflected ripple current measurement setup. vo(+) vo( - ) resistive load 10 uf 0.1 uf scope copper strip use a 0.1 m f @50v x7r ceramic capacitor (connected an inch away from the output terminals of the uut) and a 10 m f @ 25v tantalum capacitor (2 inches away from the output terminals of the uut). scope measurement should be made using a bnc socket, positioned 3 inches away from output terminals of the converter. battery cs 220 uf esr < 0.1 ohm @ 20 oc, 100 khz ltest 12 uh 33 uf esr < 0.7 ohm @ 20 oc, 100 khz vi(+) vi(-) to oscilloscope measure input reflected - ripple current with a simulated source inductance (ltest) o f 12 uh. capacitor cs offsets possible battery impedance. measure current as shown above.
technical reference notes aeo40x48 / al o40x48 series (single output 8 th brick) model: aeo40x48 / alo40x48 series sheet 7 of 18 january 13, 2005 - revision a2 (preliminary) +vin -vin enable -vout +vout -sense +sense vadj rload radj_up figure 3. external resistor configuration to increase the outputs +vin -vin enable -vout +vout -sense +sense vadj rload radj_down figure 4. external resistor configuration to increase the outputs basic operation and features input under voltage lockout to prevent any instability to the converter, which may affe ct the end system, the converter have been designed to turn - on once v in is in the voltage range of 33 - 36 vdc. likewise, it has also been programmed to turn - off when v in drops down to 31 - 34 vdc. output voltage adjust/trim the converter comes with a trim pin (pin 6), which is used to adjust the output by as much as 90% to 110% of its set point. this is achieved by connecting an external resistor as described below. to increase the output, external r adj_up resistor should be connected between trim p in (pin6) and +sense pin (pin 7). please refer to equation (1) for the required external resistance and output adjust relationship. equation (1a): 1.5v to 12v equation (1b): 1.2v to decrease the output, external r adj_down resistor should be connect ed between trim pin (pin 6) and - sense pin (pin 5). please refer to equation (2) for the required external resistance and output adjust relationship. equation (2): where: d % = percent change in output voltage radj_down 510 d % 10.2 - ? ? ? ? k w r adj_up 5.1 vo set 100 d % + ( ) 0.6 d % 510 d % - 10.2 - ? ? = kw r adj_up 5.1 vo set 100 d % + ( ) 1.225 d % 510 d % - 10.2 - ? ? = kw
technical reference notes aeo40x48 / al o40x48 series (single output 8 th brick) model: aeo40x48 / alo40x48 series sheet 8 of 18 january 13, 2005 - revision a2 (preliminary) basic operation and features (cont inued) output enable the converter comes with an enable pin (pin 2), which is primarily used to turn on/off the converter. both a positive (no ?n? suffix required) and a negative (suffix ?n? required) enable logic options are being offered. please refer t o table 2 for the part numbering scheme. for positive enable, the converter is turned on when the enable pin is at logic high or left open. the unit turns off when the enable pin is at logic low or directly connected to - v in . on the other hand, the negat ive enable version turns unit on when the enable pin is at logic low or directly connected to - v in . the unit turns off when the enable pin is at logic high. output over voltage protection (ovp) the over voltage protection circuit is non - latching - auto r ecovery mode. the output of the converter is terminated under an ovp fault condition (vo > ovp threshold). the converter will attempt to restart until the fault is removed. there is a 100ms lockout period between restart attempts. over current protecti on (ocp) the over current protection is non - latching - auto recovery mode. the converter shuts down once the output current reaches the ocp range. the converter will attempt to restart until the fault is removed. there is a 100ms lockout period between res tart attempts. over temperature protection (otp) the over temperature protection circuit will shutdown the converter once the average pcb temperature (see figure 90b for otp reference sense point) reaches the otp range. this feature prevents the unit f rom overheating and consequently going into thermal runaway, which may further damage the converter and the end system. such overheating may be an effect of operation outside the given power thermal derating conditions. restart is possible once the tempera ture of the sensed location drops to less than 110 c. remote sense the remote sense pins can be used to compensate for any voltage drops (per indicated max limits) that may occur along the connection between the output pins to the load. pin 7 (+sense ) and pin 5 ( - sense) should be connected to pin 8 (+vout) and pin 4 (return) respectively at the point where regulation is desired. the combination of remote sense and trim adjust cannot exceed 110% of v o . when output voltage is trimmed up (through remote sensing and/or trim pin), output current must be derated and maximum output power must not be exceeded.
technical reference notes aeo40x48 / al o40x48 series (single output 8 th brick) model: aeo40x48 / alo40x48 series sheet 9 of 18 january 13, 2005 - revision a2 (preliminary) performance curves 3.3v @ 30a efficiency vs. output current t a =25c 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 0 5 10 15 20 25 30 output current (amps) efficiency vin = 36vdc vin = 48vdc vin = 75vdc 0 2 4 6 8 10 12 14 0 5 10 15 20 25 30 output current (amps) power dissipation (watts) vin = 36vdc vin = 48vdc vin = 75vdc power dissipation vs. output current, t a =25c efficiency vs. output current, t a =85c 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 0 5 10 15 20 25 30 output current (amps) efficiency vin = 36vdc vin = 48vdc vin = 75vdc power dissipation vs. output current, t a =85c 0 2 4 6 8 10 12 14 0 5 10 15 20 25 30 output current (amps) power dissipation (watts) vin = 36vdc vin = 48vdc vin = 75vdc figure 6. efficiency vs. load current at minimum, nominal and high line, t a = 25 c. figure 7. power dissipation vs. load current at minimum, nominal and high line, t a = 25 c. figure 8. efficiency vs. load current at minimum, nominal and high line, t a = 85 c. figure 9. power dissipation vs. load current at minimum, nominal and high line, t a = 85 c.
technical reference notes aeo40x48 / al o40x48 series (single output 8 th brick) model: aeo40x48 / alo40x48 series sheet 10 of 18 january 13, 2005 - revision a2 (preliminary) performance curves 3.3v @ 30a (continued) figure 12. 3.3v output transient respo nse 25% to 50% step change at v in = 48vdc, t a = 25 c, c o = 0. figure 13. 3.3v output transient response 50% to 75% step change at v in = 48vdc, t a = 25 c, c o = 0. figure 11. 3.3v output ripple at v in = 48vdc, i o = full load, t a = 25 c. figure 10. 3.3v output startup characteristic at v in = 48vdc, i o = full load, t a = 25 c, c o = 0.
technical reference notes aeo40x48 / al o40x48 series (single output 8 th brick) model: aeo40x48 / alo40x48 series sheet 11 of 18 january 13, 2005 - revision a2 (preliminary) performance curves 3.3v @ 30a (con tinued) alo30f48 current vs. temperature 0 5 10 15 20 25 30 25 40 55 70 85 ambient temperature [c] current [a] 0 lfm (0 m/s) 100 lfm (0.5m/s) 200 lfm (1 m/s) 400 lfm (2 m/s) aeo30f48 current vs. temperature 0 5 10 15 20 25 30 25 40 55 70 85 ambient temperature [c] current [a] 0 lfm (0 m/s) 100 lfm (0.5m/s) 200 lfm (1 m/s) 400 lfm (2 m/s) output frequency spectrum, 0 - 1mhz -1.00e+02 -8.00e+01 -6.00e+01 -4.00e+01 -2.00e+01 0.00e+00 0.0e+00 2.0e+05 4.0e+05 6.0e+05 8.0e+05 1.0e+06 frequency (hz) dbm 480khz 960khz alo30f48 conducted emi 0 10 20 30 40 50 60 70 80 90 100 1.5e+05 2.4e+05 3.8e+05 6.0e+05 9.6e+05 1.5e+06 2.4e+06 3.9e+06 6.2e+06 9.8e+06 1.6e+07 2.5e+07 frequency db/uv figure 14. output current vs. temperature for open frame version at v in = 48vdc (t j 120 c). figure 15. output current vs. temperature for baseplate version at v in = 48vdc (t j 120 c). figure 16. typical output frequency spectrum at v in = 48vdc, i o = 100% load, c out = 0. figure 17. 3.3v open frame conducted emi per filter defined in fig 28. v in = 48 vdc, i o = 100% resistive load, c in =220uf, c out = 4700uf, t a = 25 c.
technical reference notes aeo40x48 / al o40x48 series (single output 8 th brick) model: aeo40x48 / alo40x48 series sheet 12 of 18 january 13, 2005 - revision a2 (preliminary) performance curves 5v @ 20a efficiency vs. output current, t a =25c 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 0 4 8 12 16 20 output current (amps) efficiency vin = 36vdc vin = 48vdc vin = 75vdc power dissipation vs. output current, t a =25c 0 2 4 6 8 10 0 5 10 15 20 output current (amps) power dissipation [w] vin = 36vdc vin = 48vdc vin = 75vdc efficiency vs. output current, t a = 85c 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 0 4 8 12 16 20 output current (amps) efficiency vin = 36vdc vin = 48vdc vin = 75vdc power dissipation vs. output current, t a =85c 0 2 4 6 8 10 0 5 10 15 20 output current (amps) power dissipation (w) vin = 36vdc vin = 48vdc vin = 75vdc figure 18. efficiency vs. load current a t minimum, nom and high line, t a = 25 c. figure 19. power dissipation vs. load current at min, nominal and high line, t a = 25 c. figure 20. efficiency vs. load current at minimum, nom and high line, t a = 85 c. figure 21. power dissipation vs. load current at minimum, nominal and high line, t a = 85 c.
technical reference notes aeo40x48 / al o40x48 series (single output 8 th brick) model: aeo40x48 / alo40x48 series sheet 13 of 18 january 13, 2005 - revision a2 (preliminary) performance curves 5v @ 20a (continued) figure 23. 5v output ripple at v in = 4 8vdc, i o = full load, t a = 25 c. figure 22. 5v output startup characteristic at v in = 48vdc, i o = full load, t a = 25 c, c o = 0. figure 24. 5v output transient response 25% to 50% step change at v in = 48vdc, t a = 25 c, c o = 0. figure 25. 5v output transient response 50% to 75% step change at v in = 48vdc, t a = 25 c, c o = 0.
technical reference notes aeo40x48 / al o40x48 series (single output 8 th brick) model: aeo40x48 / alo40x48 series sheet 14 of 18 january 13, 2005 - revision a2 (preliminary) performance curves 5v @ 20a (continued) alo20a48 current vs. temperature 0 5 10 15 20 25 40 55 70 85 temperature (c) output current (amps) 0 lfm (0 m/s) 100 lfm (0.5m/s) 200 lfm (1 m/s) 400 lfm (3 m/s) alo20a48 conducted emi 0 10 20 30 40 50 60 70 80 90 100 1.5e+05 2.4e+05 3.8e+05 6.0e+05 9.6e+05 1.5e+06 2.4e+06 3.9e+06 6.1e+06 9.7e+06 1.5e+07 2.5e+07 frequency db/uv tba figure 26. output current vs. temperature for open frame version at v in = 48vdc (t j 120 c). figure 27. output current vs. temperature for bas eplate version at v in = 48vdc (t j 120 c). figure 28. typical output frequency spectrum (0 ? 500khz) at v in = 48vdc, i o = 50% load, c out = 0. figure 29. 5v open frame conducted emi per filter defined in fig 28. v in = 48vdc, i o = 50% resistive load, t a = 25 c.
technical reference notes aeo40x48 / al o40x48 series (single output 8 th brick) model: aeo40x48 / alo40x48 series sheet 15 of 18 january 13, 2005 - revision a2 (preliminary) input filter for fcc class b conducted noise a reference design for an input filter that can provide fcc class b conducted noise levels is shown below (see figure 89). two common mode connected inductors are used in the circuit along with balanced bypass capacitors to shunt common mode currents into the ground plane. shunting noise current back to the converter reduces the amount of energy reaching the input lisn for measurement. the application circuit shown has an earth ground (frame ground) connected to the conv erter output ( - ) terminal. such a configuration is common practice to accommodate safety agency requirements. grounding an output terminal results in much higher conducted emissions as measured at the input lisn because a hard path for common mode current back to the lisn is created by the frame ground. ?floating? loads generally result in much lower measured emissions. the electrical equivalent of a floating load, for emi measurement purposes, can be created by grounding the converter output (load) throu gh a suitably sized inductor(s) while maintaining the necessary safety bonding. figure 89: class b filter circuit parts list ckt code description inductor ctx01 - 15091 cooper electronic technologies x - cap 0.47 f x 4pcs y - cap 22 nf x 4 pcs filter
technical reference notes aeo40x48 / al o40x48 series (single output 8 th brick) model: aeo40x48 / alo40x48 series sheet 16 of 18 january 13, 2005 - revision a2 (preliminary) mechanical specifications parameter device symbol min typ max unit dimension all l - 2.30 [58.42] - in [ mm ] w - 1.48 [37.59] - in [ mm ] aeo alo h h - - - - 0.40 [10.1] 0.32 [8.2] in [ mm ] weight aeo - 34.02 [1.2] - g [oz] alo - 22.68 [0.8] - g [oz] pin assignment 1 +v in 5 - sense 2 enable 6 trim 3 - v in 7 +sense 4 - vo 8 +vo figure 90a. alo (openframe) mechanical outline. 0.90 [22.9] 2.30 [58.4] pin side down - vin +vin e -sense trim +sense -output +output 0.32 [8.2] 2.00 [50.8] 0.15 [3.8] 0.30 [7.6] 0.45 [11.4] 0.60 [15.2] 0.75 [19.0] 0.15 [3.8] 0.45 [11.4] 0.75 [19.0] pin side down 2.30 [58.4] e - vin +vin -sense trim +sense -output +output 0.90 [22.9] 0.31 [7.9] 0.15 [3.9] 0.75 [19.1] 2.19 [55.5] 0.15 [3.8] 0.30 [7.6] 0.45 [11.4] 0.60 [15.2] 0.75 [19.1] 0.15 [3.8] 0.45 [11.4] thru - hole surface mount
technical reference notes aeo40x48 / al o40x48 series (single output 8 th brick) model: aeo40x48 / alo40x48 series sheet 17 of 18 january 13, 2005 - revision a2 (preliminary) mechanical specifications 0.90 [22.9] 2.30 [58.4] 0.40 [10.1] 0.23 [5.8] 0.15 [3.8] 0.30 [7.6] 0.45 [11.4] 0.60 [15.2] 0.75 [19.0] 0.15 [3.8] 0.45 [11.4] 0.75 [19.0] pin side down 2.00 [50.8] e +vin - vin +output -output +sense trim -sense e - vin +vin +output -output +sense trim -sense 0.90 [22.9] pin side down 2.30 [58.4] 0.15 [3.8] 0.30 [7.6] 0.45 [11.4] 0.60 [15.2] 0.75 [19.1] 0.15 [3.8] 0.45 [11.4] 0.75 [19.1] 2.19 [55.5] 0.39 [9.8] 0.15 [3.9] thru - hole surface mount 0.124 [3.15] 0.092 [2.34] min: 0.080 x 0.112 [2.03 x 2.84 ] max: 0.092 x 0.124 [2.34 x 3.15 ] mechanical tolerance .002(0.5) all dimensions are in inches (millimeters) recommended surface mount pads notes: 0.30 [7.6] 0.15 [3.8] 0.15 [3.8] 0.15 [3.8] 0.15 [3.8] 0.90 [22.9] 0.30 [7.6] 0.30 [7.6] l c 2.30 [58.4] 2.19 [55.7] 0.30 [7.6] figure 91. recommended pad layout for smt (suffix ?s?) version. otp reference sense points: vicinity of pin 2 - enable pin figure 90b. aeo (baseplate) mechanical outline.
technical reference notes aeo40x48 / al o40x48 series (single output 8 th brick) model: aeo40x48 / alo40x48 series sheet 18 of 18 january 13, 2005 - revision a2 (preliminary) recommended reflow profile 0 20 40 60 80 100 120 140 160 180 200 220 240 0 30 60 90 120 150 180 210 240 270 300 time (seconds) temperature (deg c) soldering considerations the aeo (baseplate) series converters are compatible with standard wave soldering techniques. when wave soldering, the converter pins should be preheated for 20 - 3o sec at 110 c and wave soldered at 260 c for less than 10 sec. when hand soldering, the iron temperature should be maintained at 425 c and applied to the converter pins for less than 5 seconds. longer exposure can cause internal damage to the converter. cleaning can be performed with cleaning solvent ipa or with water. for smt terminated modules, refer to figure 92 for the recommended reflow profile. table 2: part numbering scheme construction o/p current o/p voltage vin enable th pin length termination a w o xx y 48 n - 6 s l = open frame e = baseplate 10 = 10a 20 = 20a 30 = 30a 35 = 35a 40 = 40a 40 = 40a 40 = 40a b = 12v a = 5.0v f = 3.3v g = 2.5v y = 1.8v m = 1.5v k = 1.2v n = negative blank = positive 6 = 3.7mm blank = 5mm default s = smt termination (option exists for 30a and below) blank = (th) thru - hole note: 1) for through hole termination: - std pin length is 5mm nomin al (min: 0.189 [4.8]; max: 0.205 [5.2] / in [mm]) - ? - 6? option is 3.7mm nominal (min: 0.137 [3.5]; max: 0.152 [3.9] / in [mm]) - pins 4&8 diameter: ? = 0.062 [1.57], others: ? = 0.04 [1.0] (6x) please call 1 - 888 - 41 - astec for further inquiries or visit us at www.astecpower.com figure 92. recommended reflow profile for smt modules. pre - heat zone 120 - 180 sec reflow zone < 80 sec 110 c 183 c peak temperature 200 c - 230 c s lope < 4 c /sec

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