Total Power:100W(5V,12V);62.5W(2.5V);82.5W(3.3V)
25 Amps,20 Amps,8.33 Amps
Astec Industry Standard
Input Voltage :48V
No.of Outputs:Single output
ALQ25 Series
High Efficiency Quarter Brick
Electrical Specs
Input
Input Range
Input Surge
Efficiency (Typ)
36 to 75 VDC
100V /100ms
90% (5V,12V);
88%(2.5V);89.5%(3V)
Output
Special Features
• High efficiency(Typ) :90% (5V,12V);
88%(2.5V); 89.5%(3V)
• -40°C to +70°C Ambient Air Operation
• Industry standard package
2.28" x 1.45" x 0.5"(baseplated)
2.28" x1.45"x 0.4"(open frame)
• High capacitive load limit on start-up
• Basic insulation
Voltage Tolerance
(line, load, temp)
Ripple&Noise
Transient Response
<1.9%
120mV Max.
Load change 25% of Io max from 50%Io max
,<200mv,<400µs
(di/dt =1A/µs,output cap = 1000µF aluminium
electrolyte)
6V to 7.5V (5V)
3V to 3.8V(2.5V)
3.9V to 5V(3.3V)
14.4V to 18V(12V)
>22A (5V)
>9.2A(12V)
>27A(2.5V,3.3V)
Overvoltage Protection
(Hiccup)
Current Limit(Hiccup)
• Regulation to zero load
Environmental
Ambient air operating temperature range:
-40°C to +70°C
Overtemperature protection: 115°C typ
MTBF: > 2 million hours
Overtemperature Protection Auto-recovery
Switching Frequency
300k
Control
Trim range(%)
80 to 110
Enable
Positive & negative enable options
Safety
Thermal Derating
UL,CSA,EN
The module can deliver up to full power at 55°C ambient, Vin: 48V,with
200LFM forced air(output to input).
1 North America (USA): 1-888-41-ASTEC
Europe(UK): 44 (1384) 842-211
Asia (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
ALQ25 Series
Ordering Information
Input Voltage
48V
48V
48V
48V
Output Voltage
5V
2.5V
3.3V
12V
Output Current
20A
25A
25A
8.33A
Efficiency
90% Typ
88% Typ
89.5% Typ
90% Typ
Model Number
ALQ20A48N,AEQ20A48N
ALQ25G48N,AEQ25G48N
ALQ25F48N,AEQ25F48N
ALQ08B48N,AEQ08B48N
NOTES: “N” = Negative logic enable (without “N” = Positive logic enable)
Pin Assignments
Single Output
1. +Vin
2. Enable (On/Off)
3. -Vin
4. + Output
5. +Sense
6. Trim
7. -Sense
8.-Output
Open frame
Open frame
Baseplated (for 12V)
Baseplated (for 2.5V, 3.3V and 5V)
Device code suffix
-4
-6
-8
None
Tolerance: X.Xmm
!
0.5mm; X.XXmm
!
0.25mm
Length
4.8mm
!
0.5mm
3.8mm
!
0.5mm
2.8mm
!
0.25mm
5.8mm
!
0.5mm
Notes:
1. All specifications subject to change without notice. Mechanical
drawings are for reference only.
2. Technical Reference Notes should be consulted for detailed
information when available.
REV 1: Auguest 2005
2
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