north america (usa): 1-888-41-astec europe (uk): 44 (1384) 842-211 asia (hk): 852-2437-9662 1 special features electrical specs special features 50 amps ? industry standard quarter brick package 1.48" x 2.30" x 0.38" ? openfrmae low profile construction ? high capacitive load start-up ? regulation to zero load ? fixed frequency switching for emi predictability ? industry standard features: input uvlo with hysteresis, enable, ocp, ocp, otp, output voltage trim, differential remote sense ? meets basic insulation input input range 36 to 75 vdc input surge 100v /100ms efficiency 3.3v @ 91% (typical) output line / load < 0.3% vo (typical) regulation output current up to 50a max (3.3v at 40a max) noise/ripple 1 40mv pk-pk (typical) remote sense up to 10% of vo transient response 100mv (typ) deviation 50% to 75% load change 250s (typ) recovery overvoltage protection 130% typ for vo < 3.3v 125% typ for 3.3v over current protection 120% iout typ (autorecovery) over temperature 115c average pcb temperature protection (autorecovery) switching frequency 480khz 540khz (2.5v output) isolation voltage 1500vdc control voltage voltage trim 10% v o,nom enable postive or negative logic options operating ambient temperature: -40c to +85c storage temperature: -40c to +125c mtbf: > 1 million hours ul, cul 60950 tuv en60950 environmental total power: 132w input voltages: 48v no. of outputs: single safety alq50 high efficiency quarter brick
europe astec house, waterfront business park merry hill, dudley west midlands, dy5 1lx, uk telephone: 44 (1384) 842-211 facsimile: 44 (1384) 843-355 americas 5810 van allen way carlsbad, ca 92008 telephone: 760-930-4600 facsimile: 760-930-0698 2 ordering information www.astecpower.com asia units 2111-2116, level 21 tower1, metroplaza 223, hing fong road fwai fong, new territories hong kong telephone: 852-2437-9662 facsimile: 852-2402-4426 input output output efficiency 2 model number voltage voltage current 36v to 75v 3.3v 40a 91% typ alq40f48 (n) 36v to 75v 2.5v 50a 90% typ alq50g48 (n) 36v to 75v 1.8v 50a 89% typ alq50y48 (n) 36v to 75v 1.2v 50a 86% typ alq50k48 (n) options: (n) : "n" = designates negative logic enable (default is positive enable with no suffix ?n? required) 2.30 [58.4] 1.48 [37.6] [1.0?] 6 places [1.5?] 2 places 0.04? 0.36 [9.1] pin side down side view 0.06? 0.24 max [6.0] [5.0] 0.20 min 1 2 3 4 5 6 7 8 pin assignments single output 1. +vin 2. enable (on/off) 3. -vin 4. -vout 5. -sense 6. trim 7. +sense 8. +vout notes: 1. 20 mhz bandwidth. external 10 uf tant. capacitor in parallel with 1 uf ceramic capacitor placed across the output and secondary return ground. 2. efficiency measurements are typical values taken at full load, nominal line and t a = 25c. 3. all specifications are typical at nominal line, full load and t a = 25c unless otherwise noted. 4. all specifications subject to change without notice. 5. mechanical drawings are for reference only. dimensions are in inches [millimeters]. pin placement tolerance 0.005 [0.127]. mechanical tolerance 0.02 [0.5]. ? = 0.060? for pins 4&8, the rest are ? = 0.40?. 6. technical reference notes should be consulted for detailed information when available. 7. warranty 1yr. astec reserves the right to make changes to the information contained herein without notice and assumes no liability as a result of its use and application. (rev 07: october 19, 2004) pin side down 1.04 [26.4] 0.44 [11.2] 0.15 [3.8] l c 0.74 [18.8] 1.04 [26.5] 0.89 [22.7] 0.74 [18.9] 0.59 [15.0] 2.00 [50.8] 0.44 [11.2] pin side up
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