148 usa: 1-888-41-astec europe (uk): +44(0)1384-842211 asia (hk): 852-2437-9662 special features surface mount high power density 15w/cu. in. full power capability without external heat sink input differential and common mode filtering hot insertable with inrush current limit ability to limit inrush current in an external input capacitor input undervoltage lockout with hysteresis output overvoltage protection remote shutdown loadsharing on dual outputs environmental operating ambient temperature range: -40 to +75 c (no derating) cooling method: convection mtbf: 7.5 mhrs storage temperature: -55 to +125 c safety ul 1950 iec 950 csa c22.2-9.50 cb 52719-106 electrical specifications input input range: ......................... 36 to 75 vdc for 48v 18 to 36 vdc for 24v maximum inrush current limit: ........................ 1.0 a max. maximum external capacitor to limit inrush current to 1.0 a .................... 4.0 f low input shutdown: ........... 34.0 +/- 2.0 v for 48v 17.0v +/- 1.0v for 24 v auto recovery: .................... 37.0v +/- 2.0 v for 48v 18.5v +/- 1.0 v for 24v hysteresis: ........................... 3 v +/- 1 v for 48v 1.5v +/- 0.5v for 24v efficiency: ............................. 85% enable: ................................. open circuit or up to 0.5v max. disable: ................................ 4v min., 75v max. output voltage tolerance: ................ +/- 3% for single output +/- 5% for dual output noise/ripple: ........................ 75mv rms max. output voltage adjust range: ...................... +/- 10% for single output dual output non adjustable output voltage protection .... self-limiting clamp, 140% max. short circuit protection ........ continuous auto start switching frequency: ........... 200khz nominal ak42a dual 15 watts total power 15 watts input voltages 48v, 24vdc # of outputs dual ak42a dual series surface mount notes 1. all specifications are typical at nominal input and full load unless otherwise noted. 2. specification subject to change without notice. 3. mechanical drawings for reference only. 4. minimum load: 0.2 a (min 15%) 5. max. capacitive load: 330 mf
1 asia 6f., cdw building 382-392 castle peak road tsuen wan, n.t., hong kong telephone: 852-2437-9662 facsimile: 852-2402-4426 europe astec house, waterfront business park merry hill, dudley west midlands, dy5 1lx, uk telephone: +44(0)1384-842211 facsimile: +44(0)1384-843355 americas 5810 van allen way carlsbad, ca 92008 telephone: 760-930-4600 facsimile: 760-930-0698 www.astec.com 149 i nput voltage output 1 output 2 maximum model number voltage voltage power dual output- 15 watts total output power 18-36 2.5v 1.8v 10w/7.2w ak42a-024l-025d018sm 18-36 3.3v 2.5v 13.2w/10w ak42a-024l-033d025sm 18-36 5v 3.3v 15w/13.2w ak42a-024l-050d033sm 36-75 2.5v 1.8v 10w/7.2w ak42a-048l-025d018sm 36-75 3.3v 2.5v 13.2w/10w ak42a-048l-033d025sm 36-75 5v 3.3v 15w/13.2w ak42a-048l-050d033sm ordering information dimensions dual output 1. +vout 2. +vout 3. +vout 4. +vout 5. -vout 6. -vout 7.- v out 8. -vout 9. reserved 10. adjust 11. reserved 12. reserved 13. reserved 14. reserved 15. reserved 16. reserved 17. +vin 18. shutdown 19. -vin 20. reserved pin assignments notes: 1. all dimensions in mm and (inches) 2. basic tolerances: .x 0.05 (0.02) .xx 0.25 (0.010) 3.18 (0.125) 12.70 max (.500) 47.90 (1.886) 49.12 (1.934) 50.8 (2.00) 35.43 (1.395 6.34 (0.250) 1.27 ref (0.050) 2.54 typ (0.100 38.10 (1.500) 39.6 30.63 (1.56) (1.206) 2.97 (0.117) 2.54 typ (0.100) 48.01 (1.890) 3.56 typ (0.140) 1.27 typ (0.050) recommended pad layout 30 16 15 1 derating curve (t ref <105?) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 20 30 40 50 60 70 80 90 100 110 ambient temperature (?) t ref between pins 26&27 output power/max. rated o u power free convection (50lfm) 200lfm 400lfm 600lfm maximum weight: dual output: 30 grams dual output version d c d c p o w e r ak42a dual
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