North America (USA): 1-888-41-ASTEC Europe (UK): 44 (1384) 842-211Asia (HK): 852-2437-9662
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Special Features
Electrical Specs
Special Features
40 Amps
•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)
Input
Input Range 36 to 75 VDC
Input Surge 100V /100ms
Efficiency 91%@3.3V Typ
Output
Load Regulation 10mV typical down to no load
(3V3 output and below)
Line Regulation 10mV typical
(3V3 output and below)
Voltage Tolerance ±1%
Noise/Ripple 100mV max typ
150mV max for 5V
Remote sense Up to 10% of Vo
Transient Response 5% max deviation with 25% to 75% full
(output 5V and above)
200mV (output below 5V)
500µs (max) recovery
Overvoltage Protection 140% nominal output
Current Limit 140% nominal output
Switching Frequency 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)
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
UL,cUL 60950
TUV EN60950
Environmental
Total Power: 144W
Input Voltages: 48V
No. of Outputs: Single
Safety
ALQ40
High Efficiency Quarter Brick
Preliminary
REV 03: Dec 2003
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
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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 Model Number
Voltage Voltage Current
36V to 75V 5.0V 25A 91% Typ ALQ25A48
36V to 75V 3.3V 35A 90% Typ ALQ35F48
36V to 75V 2.5V 40A 89% Typ ALQ40G48
36V to 75V 1.8V 40A 87% Typ ALQ40Y48
36V to 75V 1.5V 40A 85% Typ ALQ40M48
36V to 75V 1.2V 40A 84%Typ ALQ40K48
NOTES: “N” = Negative logic enable (without “N” = Positive logic enable)
Pin Assignments
Notes:
Nominal values apply with sense pins
connected to+Vout and Ground Return
with other control pins unconnected.
Specifications subject to change without
J1: -Vin
J2: ENABLE
J3: +Vin
J4: -Vo
J5: -SENSE
J6: TRIM
J7: +SENSE
J8: +Vo
REV 3: Dec 2003
