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technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 1 of 20 august 17, 2005 ? revision c ald12/18/20/25 single output 16 th brick: 60watts the ald12/18/20/25 series is astec?s latest 16 th brick industry standard offering. operating from an input voltage range of 36v to 75v, the series provides 6 configured outputs from 1.2v all the way up to 5v. it delivers up to 25a max current for 1.8v and lower at impressive levels of efficiency. the series comes with industry standard features such as input uvlo; non-latching ocp , ovp and otp; output trim; differential remote sense pins. with its wide operating temperature range of -40c to 85c ambient, the converters are deployable into almost any environment. special features ? industry standard 16 th brick footprint ? low ripple and noise ? output pre-bias startup ? regulation to zero load ? high capacitive load start-up ? fixed switching frequency ? industry standard features: 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 36-75 vdc input surge 100v / 100ms control enable ttl compatible (positive or negative logic enable options) output load current up to 25a max (v o 1.8v) line/load regulation < 1% v o ripple and noise 40mv p-p typical adjust range 10% v o transient response 3% typical deviation 50% to 75% load change 80 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, recognized en60950 through tuv-ps
technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 2 of 20 august 17, 2005 ? revision c electrical specifications absolute maximum ratings stresses in excess of the absolute maximum ratings can cause permanent 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 adversely affect device reliability. parameter device symbol min typ max unit input voltage 1 continuous transient (100ms) all v in v in, trans -0.3 - - - 75 100 vdc isolation voltage input to output all 1500 - - vdc operating temperature all ta -40 - 85 oc storage temperature all t stg -40 - 125 oc operating humidity all - 10 - 85 % max voltage at enable pin all -0.6 - 25 vdc max output power a (5v0) - - 60 w f (3v3) - - 60 w g (2v5) - - 50 w y (1v8) - - 45 w m (1v5) - - 38 w k (1v2) - - 30 w input specifications parameter device symbol min typ 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 34.0 31.0 34.8 32.5 36.0 33.5 vdc input current 1 (v in = v in, min ; i o = i o, max ) 5v0 (a) 3v3 (f) 2v5 (g) 1v8 (y) 1v5 (m) 1v2 (k) i in-max - - - - - - - - 2.4 2.4 1.9 1.6 1.4 1.1 a max p diss @ i o = 0a (v in = v in, nom ; t a 25c) 5v0 (a) 3v3 (f) 2v5 (g) 1v8 (y) 1v5 (m) 1v2 (k) - - - - - - - - 4.1 3.9 3.4 3.4 3.4 2.6 w input ripple current 2 5hz to 20mhz all i i1 - - 10 map-p input voltage rise time 10% to 90% of vout all - 1 - v/ms inrush current all i 2 /s - - 1 a 2 /s
technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 3 of 20 august 17, 2005 ? revision c electrical specifications ( continued) output specifications parameter device symbol min typ max unit output voltage set point v in = v in, min to v in,max; i o =i o,max 5v0 (a) 3v3 (f) 2v5 (g) 1v8 (y) 1v5 (m) 1v2 (k) v o,set 4.930 3.260 2.465 1.770 1.470 1.180 5.000 3.300 2.500 1.800 1.500 1.200 5.070 3.340 2.535 1.830 1.530 1.220 vdc vdc vdc vdc vdc vdc output regulation line: v in = v in, min to v in, max load: i o = i o, min to i o, max temperature: t a = -40 oc to +85oc all all all - - - - - - 0.1 0.1 0.3 0.4 0.4 0.8 %vo %vo %vo ripple and noise 3 peak-to-peak: (5hz to 20mhz) all - - 40 100 mvp-p output current 5v0 (a) 3v3 (f) 2v5 (g) 1v8 (y) 1v5 (m) 1v2 (k) i o 0 0 0 0 0 0 - - - - - - 12 18 20 25 25 25 a external load capacitance capacitor esr all - - 4 - - 10,000 - f m ? output current-limit inception v out = 90% v o,set (autorecovery) 5v0 (a) 3v3 (f) 2v5 (g) 1v8 (y) 1v5 (m) 1v2 (k) i o 13.0 19.5 21.5 26.5 26.5 26.5 - - - - - - 19 25 30 34 34 34 a over voltage range (autorecovery) 5v0 (a) 3v3 (f) 2v5 (g) 1v8 (y) 1v5 (m) 1v2 (k) 5.9 3.9 3.0 2.1 1.8 1.4 6.2 4.1 3.2 2.4 2.1 1.6 6.9 4.9 3.9 2.9 2.5 2.1 v over temperature range (avg. pcb temp) - auto recovery all 110 - 120 c efficiency v in = v in-nom i o = i o,max t a =25 c 5v0 (a) 3v3 (f) 2v5 (g) 1v8 (y) 1v5 (m) 1v2 (k) 90.0 89.0 88.5 87.0 83.5 82.0 91.0 90.0 89.5 88.0 84.5 83.0 94.0 93.0 92.0 90.0 88.0 86.0 % % % % % %
technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 4 of 20 august 17, 2005 ? revision c electrical specifications ( continued) output specifications (continued) parameter device symbol min typ max unit turn-on response time 4 v in = v in-min to v in-max all - - 2 5 ms enable to output turn-on delay v in = v in-min to v in-max i o = i o,min to i o,max all - - - 10 ms +v in to output turn-on delay enable pin: active v in = v in-min to v in-max i o = i o,min to i o,max all - - - 10 ms switching frequency all 2v5, 5v0 - 560 650 625 725 690 800 khz dynamic response: c o = use figure 2 test setup peak deviation for load step change from i o = 50% to 75% of i o, max : settling time to within 1% of output set point voltage ? v o,set : peak deviation for load step change from i o = 50% to 25% of i o, max : settling time to within 1% of output set point voltage ? v o,set : ? i o / ? t all all all all - - - - - - - - - - 0.1 3 80 3 80 - 6 200 6 200 a/ s % vo s % vo s output overshoot at turn-on passive resistive full load vo 1v8 vo > 1v8 - - - - 0 0 5 4 %vo output enable on/off enable signal slew rate negative enable ("n" suffix) enable pin voltage: mod-on mod-off all n suffix - - - 0.01 -0.5 2.95 - - - - 1.2 20 v/ms v v positive enable (no suffix) enable pin voltage: mod-on mod-off no suffix - - 2.95 -0.5 - - 20 1.2 v output voltage remote sensing all - - - 10 %v o output voltage trim range 5 all 90 110 %v o notes: 1. the converter is not internally fused; an external fuse must be used. 2. refer to figure 1 for the input reflected ripple test setup. 3. refer to figure 2 for the output ripple and noise test measurement setup. 4 . measure output rise time from 10%v o to 90%v o . 5. refer to the output trim equations provided (equations 1 and 2).
technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 5 of 20 august 17, 2005 ? revision c electrical specifications ( continued) safety agency / material rating / isolation parameter device safety approval all ul/cul 60950 tuv en 60950 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 - 10 - mohms input to output insulation type all - basic - - fi g ure 2. peak to peak out p ut noise measurement setu p . figure 1. input reflected ripple current measurement setup. vo(+) vo(-) resistive load 10 uf 0.1 uf scope copper strip use a 0.1 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) of 12 uh. capacitor cs offsets possible battery impedance. measure current as shown above.
technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 6 of 20 august 17, 2005 ? revision c +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 rad j _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 affect the end system, the converter have been designed to turn-on once v in is in the voltage range of 34-36 vdc. likewise, it has also been programmed to turn-off when v in drops down to 31-33.5 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. thi s is achieved by connecting an external resistor as described below. to increase the output, external r adj_up resistor should be connected between trim pin (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 5v equation (1b): 1.2v to decrease the output, external r adj_down resistor should be connected 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: ? % = percent change in output voltage 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. radj_down 510 ? % 10.2 ? ? ? ? ? ? ? k ? ? r adj_up 5.1 vo set 100 ? % + () 0.6 ? % 510 ? % ? 10.2 ? ? ? ? ? ? ? =? r adj_up 5.1 vo set 100 ? % + () 1.225 ? % 510 ? % ? 10.2 ? ? ? ? ? ? ? =?
technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 7 of 20 august 17, 2005 ? revision c basic operation and features (continued) output enable (continued) 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 negative 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 recovery mode. the converter will shut down and attempt to restart u ntil the fault is removed. there is a 20-50ms lockout period between restart attempts. over current protection (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 20-50ms lockout period between restart attempts. note that the ocp threshold will be reduced proportionally with the output voltage trim up and/or remote sense compensation. the percent rise in output voltage will be proportional to the reduction in ocp current inception. over temperature protection (otp) the over temperature protection circuit will shutdown the converter once the average pcb temperature (see figure 43a for otp reference sense point) reaches the otp range. this feature prevents the unit from overheating and consequently going into therm al 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 temperature 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 (-vout) respectively at the point where regulation is desired. the combination of remote sense and trim adjust cannot exceed 11 0% 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. figure 5. typical application circuit +vin -vin +vo -vo l o a d t o sou r c e 33uf 0.1uf 10uf
technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 8 of 20 august 17, 2005 ? revision c performance curves 5v version figure 8. 5v startup characteristic at v in = 48vdc, i o = full load, t a = 25 c. figure 9. 5v output ripple at v in = 48vdc, i o = full load, t a = 25 c. figure 6. 5v efficiency vs. output current at various input line conditions, t a = 25 c. efficiency vs. output current, t a =25c 55% 60% 65% 70% 75% 80% 85% 90% 95% 024681012 output current (amps) efficienc y vin = 36vdc vin = 48vdc vin = 75vdc power dissipation vs. output current, t a =25c 0 2 4 6 8 10 024681012 output current (amps) power dissipation (watts ) vin = 36 vdc vin = 48 vdc vin = 75 vdc figure 7. 5v power dissipation vs. load current at various input line conditions, t a = 25 c.
technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 9 of 20 august 17, 2005 ? revision c performance curves 5v version (continued) 3.3v version ald12a48 current vs. temperature 0 2 4 6 8 10 12 25 40 55 70 85 temperature (c) output current (a ) 0 lfm 100lfm 200 lfm 300lfm 400 lfm figure 10. 5v output current vs. ambient temperature curves at v in = 48vdc. figure 11. 5v transient response 50% to 75% step at v in = 48vdc, t a = 25 c, di/dt = 0.1a/ s, c o = 0. efficiency vs. output current, t a =25c 55% 60% 65% 70% 75% 80% 85% 90% 95% 0369121518 output current (amps) efficienc y vin = 36vdc vin = 48vdc vin = 75vdc figure 12. 3.3v efficiency vs. output current at various input line conditions, t a = 25 c. power dissipation vs. output current, t a =25c 0 2 4 6 8 10 03 69121518 output current (amps) power dissipation (watts ) vin = 36vdc vin = 48vdc vin = 75vdc figure 13. 3.3v power dissipation vs. load current at various input line conditions, t a = 25 c.
technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 10 of 20 august 17, 2005 ? revision c performance curves 3.3v version (continued) figure 14. 3.3v startup characteristic at v in = 48vdc, i o = full load, t a = 25 c, c o = 0. figure 15. 3.3v output ripple at v in = 48vdc, i o = full load, t a = 25 c. ald18f48 current vs. tem perature 0 2 4 6 8 10 12 14 16 18 25 40 55 70 85 temperature (c) output current (a ) 0lfm 10 0 l f m 200lfm 300lfm 400lfm figure 16. 3.3v output current vs. ambient temperature curves at v in = 48vdc. figure 17. 3.3v transient response 50% to 75% step at v in = 48vdc, t a = 25 c, di/dt = 0.1a/ s, c o = 0.
technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 11 of 20 august 17, 2005 ? revision c performance curves 2.5v version efficiency vs. output current, t a =25c 55% 60% 65% 70% 75% 80% 85% 90% 95% 0 4 8 12 16 20 output current (amps) efficienc y vin = 36vdc vin = 48vdc vin = 75vdc figure 18. 2.5v efficiency vs. output current at various input line conditions, t a = 25 c. power dissipation vs. output current, t a =25c 0 2 4 6 8 10 0 5 10 15 20 output current (amps) power dissipation (watts ) vin = 36 vdc vin = 48 vdc vin = 75 vdc figure 19. 2.5v power dissipation vs. load current at various input line conditions, t a = 25 c. figure 20. 2.5v startup characteristic at v in = 36vdc, i o = full load, t a = 25 c, c o = 0. figure 21. 2.5v output ripple at v in = 48vdc, i o = full load, t a = 25 c.
technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 12 of 20 august 17, 2005 ? revision c performance curves 2.5v version (continued) 1.8v version efficiency vs. output current, t a =25c 55% 60% 65% 70% 75% 80% 85% 90% 95% 0 5 10 15 20 25 output current (amps) efficienc y vin = 36vdc vin = 48vdc vin = 75vdc figure 24. 1.8v efficiency vs. output current at various input line conditions, t a = 25 c. power dissipation vs. output current, t a =25c 0 2 4 6 8 10 0 5 10 15 20 25 output current (amps) power dissipation (watts ) vin = 36 vdc vin = 48 vdc vin = 75 vdc figure 25. 1.8v power dissipation vs. load current at various input line conditions, t a = 25 c. figure 23. 2.5v transient response 50% to 75% step at v in = 48vdc, t a = 25 c, di/dt = 0.1a/ s, c o = 0. figure 22. 2.5v output current vs. ambient temperature curves at v in = 48vdc. ald20g48 current vs. temperature 0 5 10 15 20 25 40 55 70 85 ambient temperature (c) output current (a) 0 lfm 100 lfm 200 lfm 300 lfm 400 lfm
technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 13 of 20 august 17, 2005 ? revision c performance curves 1.8v version figure 26. 1.8v startup characteristic at v in = 36vdc, i o = full load, t a = 25 c, c o = 0. figure 27. 1.8v output ripple at v in = 48vdc, i o = full load, t a = 25 c. figure 29. 1.8v transient response 50% to 75% step at v in = 48vdc, t a = 25 c, di/dt = 0.1a/ s, c o = 0. figure 28. 1.8v output current vs. ambient temperature curves at v in = 48vdc. ald25y48 current vs. temperature 0 5 10 15 20 25 25 40 55 70 85 temperature (c) output current (amps ) 0 lfm 1 00 lfm 200 lfm 300 flm 400 flm
technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 14 of 20 august 17, 2005 ? revision c performance curves 1.5v version efficiency vs. output current, t a =25c 55% 60% 65% 70% 75% 80% 85% 90% 95% 0 5 10 15 20 25 output current [a] efficiecny [% ] vin = 36vdc vin = 48vdc vin = 75vdc figure 30. 1.5v efficiency vs. output current at various input line conditions, t a = 25 c. figure 31. 1.5v power dissipation vs. output current at various input line conditions, t a = 25 c. pow er dissipation vs. output current, t a =25c 0 2 4 6 8 10 0 5 10 15 20 25 output current [a] power dissipation [ w vin = 36vdc vin = 48vdc vin = 75vdc figure 32. 1.5v startup characteristic at v in = 48v, t a = 25 c. figure 33. 1.5v output ripple at v in = 48vdc, i o = full load, t a = 25 c.
technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 15 of 20 august 17, 2005 ? revision c performance curves 1.5v version (continued) 1.2v version figure 34. 1.5v output current vs. ambient temperature curves at v in = 48vdc. output current vs. temperature 0 5 10 15 20 25 25 40 55 70 85 ambient temperature [c] current [a ] 0 lfm (0 m/s) 10 0 l f m ( 0 . 5 m / s ) 200 lfm (1 m/s) 400 lfm (3 m/s) figure 35. 1.5v output transient response 50% to 75% step at v in = 48vdc, t a = 25 c, di/dt = 0.1a/ s, c o = 0. efficiency vs. output current, t a =25c 55% 60% 65% 70% 75% 80% 85% 90% 95% 0 5 10 15 20 25 output current [a] efficiecny [% ] vin = 36vdc vin = 48vdc vin = 75vdc figure 36. 1.2v efficiency vs. output current at various input line voltage, t a = 25 c. figure 37. 1.2v power dissipation vs. output current at various input line conditions, t a = 25 c. power dissipation vs. output curtret, t a =25c 0 2 4 6 8 10 0 5 10 15 20 25 output current [a] power dissipation [ w vin = 36vdc vin = 48vdc vin = 75vdc
technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 16 of 20 august 17, 2005 ? revision c performance curves 1.2v version (continued) figure 39. 1.2v output ripple at v in = 48vdc, i o = full load, t a = 25 c. figure 38. 1.2v startup characteristic at v in = 48v, t a = 25 c. figure 41. 1.2v output transient response 50% to 75% step at v in = 48vdc, t a = 25 c, di/dt = 0.1a/ s, c o = 0. figure 40. 1.2v output current vs. ambient temperature v in = 48v, t a = 25 c. ald25k48 current vs. tem perature 0 5 10 15 20 25 25 40 55 70 85 ambient temperature (c) output current (a) 0 lfm 100 lfm 200 lfm 300 lfm 400 lfm
technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 17 of 20 august 17, 2005 ? revision c 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 42). 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 converter 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) through a suitably sized inductor(s) while maintaining the necessary safety bonding. figure 42: class b filter circuit parts list ckt code description common mode choke ctx01-15091 cooper electronic technologies x-cap 0.47 f x 4pcs y-cap 22 nf x 4 pcs cin 33 uf filter
technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 18 of 20 august 17, 2005 ? revision c mechanical specifications parameter device symbol min typ max unit dimension all l 1.28 [32.5] 1.30 [33.0] 1.32 [33.5] in [ mm ] w 0.88 [22.35] 0.90 [22.9] 0.92 [23.36] in [ mm ] h 0.33 [8.38] 0.35 [8.8] 0.37 [9.39] in [ mm ] weight all - 14.17 [0.54] - g [oz] pin assignment 1+v in 5-sense 2enable6 trim 3-v in 7+sense 4-v out 8+v out figure 43a. mechanical outline ? through hole termination pin 1 pin 8 pin side up pin side down side view 0.60 [15.2] 0.30 [7.6] 0.15 [3.8] [1.0?](6x) ( { - 6 option} pin lenght) . 0.04? ( std pin lenght) . 0.137 [3.5] min 0.152 [3.9] max 0.189[4.8]min. 0.205 [5.2]max. 0.19 [4.8] 0.35 [8.8] 0.60 [15.2] 0.45 [11.4] 0.30 [7.6] 0.15 [3.8] 0.15 [3.8] 1.10 [27.9] 0.10 [2.5] 0.10 [2.5] [1.57?] (2x) 0.062 ? 0.90 [22.9] 1.30 [ 33.0] otp sense point
technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 19 of 20 august 17, 2005 ? revision c mechanical specifications (continued) figure 43b. mechanical outline ? smt (solder ball) termination. soldering considerations the through hole terminated converters are compatible with standard wave soldering techniques. when wave soldering, the converter pins should be preheated for 20-30 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 44 for the recommended reflow profile. figure 44. recommended reflow profile for smt modules. 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) pre-heat zone 120 - 180 sec reflow zone < 80 sec 110 c 183 c peak temperat u re 2 00 c - 2 30 c s l o pe < 4 c /sec 0.06 [1.4] 0.30 [ 7.6] 0.30 [7.6] 0.10 [ 2.5] 0.15 [ 3.8] 0.90 [22.9] 0.36 [ 9.0] 0.60 [15.2] 0.45 [11.4] 0.15 [3.8] 0.30 [ 7.6] 0.15 [ 3.8] 1.10 [27.9] pin side down pin side up 0.18 [ 4.6] side view 1.30 [ 33.0] pin 1 pin 8
technical reference notes ald12/18/20/25 series (single output 16 th brick) model: ald12/18/20/25 series sheet 20 of 20 august 17, 2005 ? revision c part numbering scheme construction o/p current o/p voltage vin enable th pin length termination a w d xx y 48 n - 6 s l = open frame e = baseplate 12 = 12a 18 = 18a 20 = 20a 25 = 25a 25 = 25a 25 = 25a 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 (consult with factory) blank = (th) thru-hole note: 1) for through hole termination: - std pin length is 5mm nominal (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) 2) for smt termination: - recommended surface mount pad ? = 0.11 [2.79] 0.005 [0.13] (in [mm]) please call 1-888-41-astec for further inquiries or visit us at www.astecpower.com

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