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
1
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
www.astecpower.com
2
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