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technical reference notes ALQ15XX48X series (open frame dua l output quarter brick) model: alq15 series sheet 1 of 19 march 4, 2004 - revision 01 alq15 dual output open - frame dc - dc converter module industry standard ? brick: 36v - 75v input / 60w output power the alq15 series is astec's latest dual output; high - density converter offering that comes in an industry standard ? brick open - frame package. with its independently controlled output rails, the module effectively minimizes cross regulation, which has been an issue to most dual converters available in the market. the alq15 series has been designed to deliver 60w of clean, well - regulated, low noi se dc power for today's demanding loads at respectable efficiency levels: 3.3v - 2.5v combination @ 87.5% (60w output power). output combinations currently available are 5.0v/3.3v - 3.3v/2.5v - 3.3v/1.8v - 2.5v/1.5v, with each output rail able to deliver 15a max (5v@12a). the module comes with standard feature sets such as output enable with positive or negative options; output voltage - adjust; over current, over voltage and over temperature protection. in addition, it is also being offered at both 5mm (std) a nd 3.7mm pin lengths. special features tight regulation low ripple and noise at < 30mv pk - pk industry standard ? brick footprint positive and negative enable options regulation to zero load high capacitiv e load start - up fixed switching frequency output trim input under - voltage lockout basic insulation environmental specifications - 40oc to 85oc operating temperature - 55oc to 125oc storage temperature designed for > 1 million hours mtbf electrical parameters input input range 36 - 75 vdc input surge 100v / 100ms efficiency 5.0v/3.3v @ 89.5% (typ at 60w) 3.3v/2.5v @ 87.7% 3.3v/1.8v @ 86.5% 2.5v/1.5v @ 84.0% control enable ttl compatible (positive and negative enable options) output load current 15a max per channel (60w max) 5v @ 12a max line/load r egulation < 1% v o (typ) ripple and noise 30mv pk - pk output voltage adjust range 10% vo transient response 3% v o deviation max (3.3v) 50% to 75% load change 220 m sec typical settling time (for 3.3v) over current protection 130% i o,max typical safety ul + cul 60950, recognized en60950 through tuv - ps cb report
technical reference notes ALQ15XX48X series (open frame dua l output quarter brick) model: alq15 series sheet 2 of 19 march 4, 2004 - revision 01 alq15 series model name construction v out / i out alq15af48 open frame 5.0v - 12a / 3.3v - 15a alq15fg48 open frame 3.3v - 15a / 2.5v - 15a alq15fg48n - 6d* open frame 3.3v - 15a / 2.5v - 15a alq15fy48 open frame 3.3v - 15a / 1.8v - 15a alq15gm48 open frame 2.5v - 15a / 1.5v - 15a options: suffix negative enable: "n" positive enable: no suffix 3.7mm (nominal) pin length: " - 6" * check part numbering scheme on table 2 and the correspondin g external trim function on table 1 - d
technical reference notes ALQ15XX48X series (open frame dua l output quarter brick) model: alq15 series sheet 3 of 19 march 4, 2004 - revision 01 electrical specifications standard test condition on a single module unless otherwise specified. ta: 25oc (ambient air) +v in : pin 1 48v 2v enable: pin 2 open (positive enable) - v in : pin 3 return pin for +vin +v out2 : pin 4 connect to load 2 - v out : pin 5 return pin for load 1 & 2 trim: pin 6 open +v out1 : pin 7 connect to load 1 airflow refer to the appropriate derating curve 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 abso lute maximum ratings for extended period can adversely affect device reliability. parameter device symbol min typ max unit input voltage: continuous transient(100ms) : all all v in v i n, trans 0 0 - - 75 100 vdc vdc operating am bient temperature 1 all t a - 40 - +85 oc storage temperature all t stg - 55 - 125 oc operating humidity all - - - 85 % i/o isolation all - 1500 - - vdc maximum enable voltage all 25 vdc note: 1. power derating applies. refer to figures 15 to 18.
technical reference notes ALQ15XX48X series (open frame dua l output quarter brick) model: alq15 series sheet 4 of 19 march 4, 2004 - revision 01 electrical specifications ( continued) input specification parameter device symbol min typ max unit operating input voltage all v in 36 48 75 v dc maximum input current 2 conditions: v in = bet ween 0 to v in,min p o = p o,max ; t a = 25 oc af fg fy gm i in,max - - 2.20 2.20 2.20 2.27 a input reflected ripple current 3 conditions: p o = p o,max ; t a = 25 oc all i i1 / i i2 - 10 20 ma pk - pk standing loss condition: v in = v in,nom ; t a = 25 oc all - - - 3.0 w note: 2. the power module is not internally fused. an input line fuse (e.g. littelfuse type 312003. 3a, 250v) is recommended. 3. see figure 1 for input reflected ripple current test setup. output spe cifications parameter device symbol min typ max unit voltage setpoint conditions: v i = v in,nom ; t a = 25 oc; v o1 : i o1 = i o,max ; p o = 60w v o2 : i o2 = i o,max ; p o = 60w af fg fy gm v o1 / v o2 v o1 / v o2 v o1 / v o2 v o1 / v o2 4.93 / 3.25 3. 25 / 2.46 3.25 / 1.76 2.46 / 1.47 5.00 / 3.30 3.30 / 2.50 3.30 / 1.80 2.50 / 1.50 5.08 / 3.35 3.35 / 2.54 3.35 / 1.84 2.54 / 1.53 vdc load current 5.0v 3.3v 2.5v 1.8v 1.5v i o1 /i o2 i o1 /i o2 i o1 /i o2 i o1 /i o2 i o1 /i o2 0 0 0 0 0 - - - - - 12.0 15 .0 15.0 15.0 15.0 a combined output power p o = p o1 + p o2 af fg fy gm p o p o p o p o - - - - - - - - 60 60 60 60 w line regulation: conditions: v in = v in, min to v in, max ; i o1 = i o, max , i o2 = i o, min v in = v in, min to v in, max ; i o1 = i o, min , i o2 = i o, max 5.0v 3.3v 2.5v 1.8v 1.5v - - - - - 0.06 0.03 0.03 0.03 0.03 0.15 0.10 0.10 0.10 0.10 %vo
technical reference notes ALQ15XX48X series (open frame dua l output quarter brick) model: alq15 series sheet 5 of 19 march 4, 2004 - revision 01 electrical specifications ( continued) output specifications parameter device symbol min typ max unit load regulation 4 conditions: i o = 1a to i o,max ; v in =v in,nom 5.0v 3.3v 2.5v 1.8v 1.5v - - - - - 0.06 0.12 0.20 0.26 0.33 0.40 0.60 0.70 0.90 1.00 %vo cross regulation 4 conditions: v in = v in,nom , i o = i o,max all - - 0.20 %vo temperature conditions: t a = - 40 oc to +65 oc; v in = v in,nom ; i o = i o,max all - - 1.50 %vo output ripple and noise: peak - to - peak 5 conditions: i o = i o,max ; v in =v in,nom ; bw = 20 mhz; t a =25 o c 5.0 3.3 2.5 1.8 1.5 - - - - - 12 12 12 18 18 25 25 25 30 30 mv pk - pk external load capacitance 6 all - - 10000 m f over current limit inception conditions: vo = 90% v o,nom ; i o2 = i o,min; v in = v in,nom characteristics: hiccup mode, auto - recovery all 5.0v i o,ocp i o,ocp 16.5 13.2 - - 25 22 a output short circuit conditions: v in = v in,nom ; i o2 = 0a t a = 25 oc all i opk i orms i odc i ins - - 28 5 1 150 a pk a rms a ma efficiency conditions: v in = v in,nom ; t a = 25 oc p o = p o,max , balanced current loading af fg fy gm h h h h 89.0 87.0 86.0 83.0 89.5 87.7 86.5 84.0 90.5 88.5 87.5 85.0 % switching frequency note: can be determined from output ripple waveform all - - 300 375 khz note: 4. channel under test shall follow the specified conditions while the other channel is set to min load, 0a. 5. channel under test shall be set to full load with the other channel set to i o, min - see fig 2 for the recommended output ripple and noise test setup. 6. refer to ysc plots on fig 19 and 20 to determine loop stability at various output load impedance.
technical reference notes ALQ15XX48X series (open frame dua l output quarter brick) model: alq15 series sheet 6 of 19 march 4, 2004 - revision 01 electrical specifications ( continued) output specifications parameter device symbol min typ max unit dynamic response 7 conditions: d i o / d t = 0.15a/ m s ; v in = v in,nom ; t a = 25 c peak voltage deviation load change: i o = 50% to 75% or 75% to 50% i o,max 5.0v 3.3v 2.5v 1.8v 1.5v - - - - - - - - - - 0.8 1.3 1.6 2.3 2.8 2.0 3.0 3.0 5.0 5.0 %vo transient settling time note: v o,nom (ref.) (from ref. to 0.1 d v pk ) 5.0v 3.3v 2.5v 1.8v 1.5v - - - - - - - - - - 360 220 210 145 136 500 500 500 300 300 m sec turn - on time conditions: v in = v in,min; i o1 = i o,max , i o2 = i o,min ; t a = 25 c note: v o1 within 1% af fg fy gm - - - - - - - - 21 16 16 14 30 30 30 30 msec output voltage overshoot conditions: v in = v in,nom ; t a = 25 c; p o = 0w 5.0v 3.3v 2.5v 1.8v 1.5v - - - - - - - - - - 0 0 1 2 3 1 1 2 4 4 %v o note: 7. dynamic response tested with 10uf - aluminum and 1uf - tantalum capacitors across the load. feature specification parameter device symbol min typ max unit undervoltage lockout turn - on point turn - off point all all - - - 32 35.0 34.0 36.0 - v v output voltage adjustment range conditions: v in = v in,nom ; t a = 25 c v o1 : i o1 = i o,max , i o2 = i o,min v o2: i o1 = i o,min ; i o2 = i o,max note: tolerance = 1% all - 90 - 110 %v o
technical reference notes ALQ15XX48X series (open frame dua l output quarter brick) model: alq15 series sheet 7 of 19 march 4, 2004 - revision 01 electrical specifications ( continued) feature specification parameter device symbol min typ max unit enable pin vo ltage positive logic logic low: module off logic high: module on w/o n - suffix v enable v enable 0 1.5 - - 2.2 5.0 v v negative logic logic low: module on logic high: module off n - suffix v enable v enable 0 1.5 - - 2.2 5.0 v v enable pin current logic low logic high: (i lkg at v enable = 5v) all all i enable i enable - - - - 1.0 50 ma m a module output voltage at logic high (negative enable) at logic low (positive enable) n - suffi x w/o n - suffix v o v o - - - - 1.2 1.2 v v output over voltage clamp conditions: v in = v in,nom ; t a = 25 c characteristics: hiccup mode; auto - tracking wrt vout trim 5.0v 3.3v 2.5v 1.8v 1.5v v o,clamp v o,clamp v o,clamp v o,clamp v o,clamp 5.7 3.8 2.8 2.0 1.7 6.0 3.9 3.0 2.2 1.8 6.5 4.3 3.4 2.4 2.1 v v v v v over - temperature shutdown note: 1. t comp(max) < 140 c 2. measured in the vicinity of pin 3 and r29 all t b 110 115 120 c isolation specificat ion parameter device symbol min typ max unit isolation capacitance all - - 680 - pf isolation resistance all - 10 - - m w
technical reference notes ALQ15XX48X series (open frame dua l output quarter brick) model: alq15 series sheet 8 of 19 march 4, 2004 - revision 01 safety approval the alq15 series have been certified through: ul + cul 60950, third edition - re cognized en 60950 through tuv - ps cb report basic insulation figure 2. pea k to peak output noise measurement setup. figure 1. input reflected ripple current measurement setup. 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 note: measure the input reflected ripple current with a simulated source inductance (ltest) of 12uh. capac itor cs offsets possible battery/ source impedance. measure current as shown above. vo(+) vo(-) resistive load 10 uf 1 uf scope copper strip note: use a 1 m f 50v x7r ceramic capacitor and a 10 m f 25v tantalum cap. scope measurement should be made using a bnc probe socket positioned about 76mm (3 in.) away from the module?s output terminals. the ext. capacitors should be placed between the bnc socket and the module?s output terminals, with a minimum distance of 51mm (2in.) from the latter.
technical reference notes ALQ15XX48X series (open frame dua l output quarter brick) model: alq15 series sheet 9 of 19 march 4, 2004 - revision 01 basic operation and features input under voltage lockout to prevent any instability to the converter that may affect and consequently damage the end system, the alq15 series have been designed to turn - on once v in is in the voltage range of 35 - 36 vdc. likewise, it has also been programmed to turn - off when v in drops down to 32 - 34 vdc. output voltage adjust/trim the converter comes with a trim pin (pin 6), which is used to adjust both outputs simultaneously 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 voltages, external r trim - up resistor should be connect ed between trim pin (pin6) and rtn pin (pin 5). please refer to figure 3 for the resistor configuration and table 1 for the required resistor values in attaining the desired output adjustment to decrease the output voltages, external r trim - down resistor should be connected between trim pin (pin 6) and v out1 (pin 7). this trim configuration is true for the af, fg, fy and gm standard versions. please refer to figure 4 for the resistor configuration and table 1 for the required resistor values in attaining t he desired output adjustment. for alq15fg48n - 6d, r trim - dn resistor is connected between the trim pin and v out2 (2.5v output pin). table 1 - a table 1 - b alq15af48 (5v / 3.3v) alq15fg48 / alq15fy48 ? [%} r trim - up [ko] ? [%} r trim - down [ko] ? [%} r trim - up [ko] ? [%} r trim - down [ko] +1 32.45 - 1 32.39 +1 12.42 - 1 12.58 +2 13.66 - 2 15.09 +2 5.26 - 2 5.86 +3 7.83 - 3 8.95 +3 3.02 - 3 3.47 +4 4.99 - 4 5.80 +4 1.93 - 4 2.25 +5 3.31 - 5 3.89 +5 1.28 - 5 1.51 +6 2.20 - 6 2.60 +6 0.85 - 6 1.01 +7 1.41 - 7 1.67 +7 0.55 - 7 0.65 +8 0.82 - 8 0.98 +8 0.32 - 8 0.38 +9 0.36 - 9 0.44 +9 0.14 - 9 0.17 +10 0.00 - 10 0.00 +10 0.00 - 10 0.00 figure 3. external trim resistor setup to increase output for all versions. figu re 4. external trim resistor setup to decrease output for af; fg; fy and gm standard versions only.
technical reference notes ALQ15XX48X series (open frame dua l output quarter brick) model: alq15 series sheet 10 of 19 march 4, 2004 - revision 01 basic operation and features (continued) table 1 - c table 1 - d alq15gm48 ( 2.5v / 1.5v) alq15fg48n - 6d* ? [%} r trim - up [ko] ? [%} r trim - down [ko] ? [%} r trim - up [ko] ? [%} r trim - down [ko] +1 70.46 - 1 70.31 +1 46.84 - 1 66.47 +2 29.65 - 2 32.75 +2 20.82 - 2 27.32 +3 17.00 - 3 19.42 +3 12.14 - 3 15.55 +4 10.83 - 4 12.58 +4 7.81 - 4 9.87 +5 7.18 - 5 8.43 +5 5.20 - 5 6.53 +6 4.77 - 6 5.64 +6 3.47 - 6 4.34 +7 3.06 - 7 3.63 +7 2.23 - 7 2.78 +8 1.78 - 8 2.12 +8 1.30 - 8 1.62 +9 0.79 - 9 0.94 +9 0.58 - 9 0.72 +10 0.00 - 10 0.00 +10 0.00 - 10 0.00 * di/dt?s qd48t025033 trim equivalent alq15 standard trim util izes approximately similar range of trim resistors for both rtrim - up and rtrim - down to adjust the outputs. this facilitates ease of resistor selection and contributes to a decreased number of parts for customer inventory if the trim pin is being utilized. output enable the alq15 comes with an enable pin (pin 2), which is primarily used to turn on/off the converter. both a positive (no part number suffix required) and a negative (suffix ?n? required) enable logic options are being offered. please refer to 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 negativ e enable version turns 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 will shut down the entire conve rter if any of the two output voltages exceeds the ovp threshold limits. the converter will automatically recover once the fault is removed. over current protection (ocp) the over current protection circuit will shutdown the converter if any of the load current of either output reaches the ocp threshold limits. the unit will automatically recover once the over current condition is removed. see figure 12 for typical output characteristic under an over current condition. over temperature protection (otp) the over temperature protection circuit will shutdown the converter once the sensed location reaches the otp range. this feature prevents the unit from 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 temperature of the sensed location drops to less than 110 c.
technical reference notes ALQ15XX48X series (open frame dua l output quarter brick) model: alq15 series sheet 11 of 19 march 4, 2004 - revision 01 performance curves alq15fg48 3.3v/2.5v efficiency @ p o1 = p o2 50 55 60 65 70 75 80 85 90 5 10 15 20 25 30 35 40 45 50 55 60 total output power [w] efficiency (%) 36vin 48vin 75vin 3.3v/2.5v efficiency @ balanced current 55 60 65 70 75 80 85 90 0 2 4 6 8 10 load current i o1 = i o2 [a] efficiency (%) 36vin 48vin 75vin figure 5. efficiency at balanced power (p o1 = p o2 ) f or various input voltages; taken at t a =25oc with the converter mounted vertically and with 200lfm airflow directed from pin 3 to pin 1. figure 6. efficiency curve for balanced output current (i o1 = i o2 ) at various input voltages; taken at t a =25oc with t he converter mounted vertically and with 200lfm airflow directed from pin 3 to pin 1. figure 7. start - up characteristic of vo1 (ch1) and vo2 (ch2) at balanced load current; v in = 48v. figure 8. typical output current waveform under an over current condition. output current scale at 0.5a/ mv.
technical reference notes ALQ15XX48X series (open frame dua l output quarter brick) model: alq15 series sheet 12 of 19 march 4, 2004 - revision 01 performance curves (continued) alq15af48 (5.0v / 3.3v) series 5v/3.3v efficiency @ p o1 = p o2 50 55 60 65 70 75 80 85 90 95 5 10 15 20 25 30 35 40 45 50 55 60 total output power [w] efficiency (%) 36vin 48vin 75vin 5v/3.3v efficiency @ balanced current 60 65 70 75 80 85 90 95 0 1 2 3 4 5 6 7 load current i o1 = i o2 [a] efficiency (%) 36vin 48vin 75vin alq15fy48 (3.3v / 1.8v) series 3.3v/1.8v efficiency @ p o1 = p o2 50 55 60 65 70 75 80 85 90 5 10 15 20 25 30 35 40 45 50 55 60 total output power [w] efficiency (%) 36vin 48vin 75vin 3.3v/1.8v efficiency @ balanced current 55 60 65 70 75 80 85 90 0 2 4 6 8 10 12 load current i o1 = i o2 [a] efficiency (%) 36vin 48vin 75vin figure 9. efficiency at balanced power (p o1 = p o2 ) for various input voltages; taken at t a =25oc with the converter mounted vertically and with 100lfm airflow directed from pin 3 to pin 1. figure 10. efficiency curve for balanced output current (i o1 = i o2 ) at various input voltages; taken at t a =25oc with the converter mounted vertically and with 100lfm airflow directed from pin 3 to pin 1. figu re 11. efficiency at balanced power (p o1 = p o2 ) for various input voltages; taken at t a =25oc with the converter mounted vertically and with 300lfm airflow directed from pin 3 to pin 1. figure 12. efficiency curve for balanced output current (i o1 = i o2 ) at various input voltages; taken at t a =25oc with the converter mounted vertically and with 300lfm airflow directed from pin 3 to pin 1.
technical reference notes ALQ15XX48X series (open frame dua l output quarter brick) model: alq15 series sheet 13 of 19 march 4, 2004 - revision 01 performance curves (continued) alq15gm48 (2.5v / 1.5v) series 2.5v/1.5v efficiency @ p o1 = p o2 50 55 60 65 70 75 80 85 90 5 10 15 20 25 30 35 40 45 50 55 60 total power [w] efficiency (%) 36vin 48vin 75vin 2.5v/1.5v efficiency @ balanced current 55 60 65 70 75 80 85 90 0 3 6 9 12 15 load current i o1 = i o2 [a] efficiency (%) 36vin 48vin 75vin figure 13. efficiency at balanced power (p o1 = p o2 ) for various input voltages; taken at t a =25oc with the conv erter mounted vertically and with 400lfm airflow directed from pin 3 to pin 1. figure 14. efficiency curve for balanced output current (i o1 = i o2 ) at various input voltages; taken at t a =25oc with the converter mounted vertically and with 400lfm airflow directed from pin 3 to pin 1.
technical reference notes ALQ15XX48X series (open frame dua l output quarter brick) model: alq15 series sheet 14 of 19 march 4, 2004 - revision 01 performance curves (continued) current vs. temperature curves output power vs ambient temperature (5v/3.3v) 0 10 20 30 40 50 60 70 5 15 25 35 45 55 65 75 85 ambient temperature ( o c) total power (w) 0 lfm 100 lfm 200 lfm 300 lfm 400 lfm output power vs. ambient temperature (3.3v/2.5v) 0 10 20 30 40 50 60 70 5 15 25 35 45 55 65 75 85 ambient temperature ( o c) total power (w) 0 lfm 100 lfm 200 lfm 300 lfm 400 lfm 500 lfm 600 lfm figure 15. total output power (balanced load: i o1 = i o2 ) vs. ambient temperature curves for alq15af48 version taken at various airflow conditions (converter mounted horizontally with airflow direction from pin 3 to pin1; v in = 48v nomina l). figure 16. total output power (balanced load: i o1 = i o2 ) vs. ambient temperature curves for alq15fg48 version taken at various airflow conditions (converter mounted horizontally with airflow direction from pin 3 to pin1; v in = 48v nominal).
technical reference notes ALQ15XX48X series (open frame dua l output quarter brick) model: alq15 series sheet 15 of 19 march 4, 2004 - revision 01 performance curves (continued) current vs. temperature curves output power vs. ambient temperature (3.3v/1.8v) 0 10 20 30 40 50 60 70 5 15 25 35 45 55 65 75 85 ambient temperature ( o c) total power (w) 0 lfm 100 lfm 200 lfm 300 lfm 400 lfm 500 lfm 600 lfm output power vs. ambient temperature (2.5v/1.5v) 0 10 20 30 40 50 60 70 5 15 25 35 45 55 65 75 85 ambient temperature ( o c) total power (w) 0 lfm 100 lfm 200 lfm 300 lfm 400 lfm 500 lfm 600 lfm figure 17. total output power (balanced load: i o1 = i o2 ) vs. ambient temperature curves for alq15fy48 version taken at various airflow conditions (converter mounted horizontally with airflow direction from pin 3 t o pin1; v in = 48v nominal). figure 18. total output power (balanced load: i o1 = i o2 ) vs. ambient temperature curves for alq15gm48 version taken at various airflow conditions (converter mounted horizontally with airflow direction f rom pin 3 to pin1; v in = 48v nominal).
technical reference notes ALQ15XX48X series (open frame dua l output quarter brick) model: alq15 series sheet 16 of 19 march 4, 2004 - revision 01 young?s stability curves alq15 3.3 volt channel 100 1 . 10 3 1 . 10 4 1 . 10 5 1 . 10 3 0.01 0.1 1 impedance magnitude ohms 100 1 . 10 3 1 . 10 4 1 . 10 5 100 0 100 frequency hz phase angle deg alq15 2v5 volt channel 100 1 . 10 3 1 . 10 4 1 . 10 5 1 . 10 4 1 . 10 3 0.01 0.1 1 frequency hz impedance magnitude ohms 100 1 . 10 3 1 . 10 4 1 . 10 5 100 0 100 frequency hz phase deg _______ 15 _______ 30 _______ 45 _______ 60 _______ 75 _______90 figure 19. ysc plots of 3v3 and 2v5 output channels.
technical reference notes ALQ15XX48X series (open frame dua l output quarter brick) model: alq15 series sheet 17 of 19 march 4, 2004 - revision 01 young?s stability curves ( continued) alq15 1v8 volt channel 100 1 . 10 3 1 . 10 4 1 . 10 5 1 . 10 3 0.01 0.1 1 frequency hz impedance magnitude ohms 100 1 . 10 3 1 . 10 4 1 . 10 5 100 0 100 frequency hz pahse deg 100 1 . 10 3 1 . 10 4 1 . 10 5 1 . 10 3 0.01 0.1 1 frequency hz impedance magnitude ohms alq15 1v5 volt channel 100 1 . 10 3 1 . 10 4 1 . 10 5 100 0 100 frequency hz phase deg _______ 15 _______ 30 _______ 45 _______ 60 _______ 75 _______90 figure 20. ysc plots of 1v8 and 1v5 output channels.
technical reference notes ALQ15XX48X series (open frame dua l output quarter brick) model: alq15 series sheet 18 of 19 march 4, 2004 - revision 01 mechanical specifications parameter device symbol min typ max unit dimension all l - 2.30 [58.4] - in [ mm ] w - 1.48 [37.6] - in [ mm ] h - 0.50 [12.6] - in [ mm ] weight - tbd g [oz] pin assignment 1 +v in 5 secondary return/ ground 2 enable 6 trim 3 - v in 7 +v o1 4 +v o2 note: pin diameters at ? = 0.04" [1.02 mm] nominal. pin placement tolerance 0.005 [0.127] mechanical tolerance 0.02 [0.5] front side top 2 c 3 l 1 6 4 5 7 figure 21. alq15 series mechanical outline ( inches [(mm ]). p in side up pin side down side
technical reference notes ALQ15XX48X series (open frame dua l output quarter brick) model: alq15 series sheet 19 of 19 march 4, 2004 - revision 01 mechanical specifications (continued) soldering considerations the alq15 series converters are compatible with standard wave soldering techniques. when wave soldering, the converter pins should be preheated for 20 - 30 seconds at 110 c and wave soldered at 260 c for less than 10 seconds. 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. part numbering scheme for ordering output voltage 1 output voltage 2 enable logic pin length option special feature alq15 v w 48 x - y z a = 5.0v f = 3.3v ?blank? = positive ?blank? = 5 mm (std) ?d? ? special f = 3.3v g = 2.5v "n" = negative ? - 6? = 3.7mm trim function f = 3.3v y = 1.8v g = 2.5v m = 1.5v table 2. part numbering information. please call 1 - 888 - 41 - astec for further inq uiries or visit us at www.astecpower.com

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