40 Amps Total Power: Input Voltages: No. of Outputs: 144W 48V Single ALQ40 High Efficiency Quarter Brick Electrical Specs Preliminary Input Input Range Input Surge Efficiency 36 to 75 VDC 100V /100ms 91%@3.3V Typ Output Load Regulation Line Regulation Voltage Tolerance Noise/Ripple Special Features • High efficiency (91% Typical) • -40°C to +70°C Ambient Air Operation • Industry standard package 1.48" x 2.30" x 0.38" • High capacitive load limit on start-up • Remote sense compensation • Basic insulation • Regulation to zero load • Fixed frequency switching (200KHz) Remote sense Transient Response Overvoltage Protection Current Limit Switching Frequency 10mV typical down to no load (3V3 output and below) 10mV typical (3V3 output and below) ±1% 100mV max typ 150mV max for 5V Up to 10% of Vo 5% max deviation with 25% to 75% full (output 5V and above) 200mV (output below 5V) 500µs (max) recovery 140% nominal output 140% nominal output 200KHz (typ) Control Voltage Adjust 90 to 110% for 5V output 80 to 110% for 3.3V and below Enable TTL compatible (positive & negative enable options) Environmental Ambient air operating temperature range: -40°C to +70°C Storage temperature: -40°C to +125°C Overtemperature protection: 115°C typical MTBF: > 1 million hours Safety UL,cUL 60950 TUV EN60950 REV 03: Dec 2003 1 North America (USA): 1-888-41-ASTEC Europe (UK): 44 (1384) 842-211Asia (HK): 852-2437-9662 AMERICAS EUROPE ASIA 5810 Van Allen Way Carlsbad, CA 92008 Telephone: 760-930-4600 Facsimile: 760-930-0698 Astec House, Waterfront Business Park Merry Hill, Dudley West Midlands, DY5 1LX, UK Telephone: 44 (1384) 842-211 Facsimile: 44 (1384) 843-355 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 Ordering Information Input Voltage Output Voltage Output Current Efficiency Model Number 36V to 75V 36V to 75V 36V to 75V 36V to 75V 36V to 75V 36V to 75V 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 25A 35A 40A 40A 40A 40A 91% Typ 90% Typ 89% Typ 87% Typ 85% Typ 84% Typ ALQ25A48 ALQ35F48 ALQ40G48 ALQ40Y48 ALQ40M48 ALQ40K48 NOTES: “N” = Negative logic enable (without “N” = Positive logic enable) Pin Assignments J1: -Vin J2: ENABLE J3: +Vin J4: -Vo J5: -SENSE J6: TRIM J7: +SENSE J8: +Vo Notes: Nominal values apply with sense pins connected to+Vout and Ground Return with other control pins unconnected. Specifications subject to change without REV 3: Dec 2003 www.astecpower.com 2