Document
40 Amps
ALQ40
High Efficiency Quarter Brick
Total Power: Input Voltages: No. of Outputs:
144W 48V Single
Preliminary
Input
Electrical Specs
Input Range Input Surge Efficiency 36 to 75 VDC 100V /100ms 91%@3.3V Typ
Output
Load Regulation Line Regulation Voltage Tolerance Noise/Ripple 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)
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
Control
Voltage Adjust 90 to 110% for 5V output 80 to 110% for 3.3V and below TTL compatible (positive & negative enable options)
Enable
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
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North America (USA): 1-888-41-ASTEC
Europe (UK): 44 (1384) 842-211Asia (HK): 852-2437-9662
AMERICAS 5810 Van Allen Way Carlsbad, CA 92008 Telephone: 760-930-4600 Facsimile: 760-930-0698
EUROPE Astec House, Waterfront Business Park Merry Hill, Dudley West Midlands, DY5 1LX, UK Telephone: 44 (1384) 842-211 Facsimile: 44 (1384) 843-355
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
Ordering Information
Input Voltage 36V to 75V 36V to 75V 36V to 75V 36V to 75V 36V to 75V 36V to 75V Output Voltage 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V Output Current 25A 35A 40A 40A 40A 40A Efficiency 91% Typ 90% Typ 89% Typ 87% Typ 85% Typ 84% Typ Model Number 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
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