ALQ25_03 Datasheet, PDF (1/15 Pages) Astec America, Inc – Single Output Open-Frame DC-DC Converter Module Industry Standard ¼ Brick: 36V-75V Input / 5V Output

Technical Reference Notes
ALQ25 Series
(Open Frame Single Output Quarter Brick)
ALQ25 Single Output Open-Frame DC-DC Converter Module
Industry Standard ¼ Brick: 36V-75V Input / 5V Output
The ALQ25 series is Astec's next generation single output, high-density standard quarter brick offering. It operates from a 36V
to 75V DC Bus and comes in different Isolated Logic Output voltages (ILO) well suited for DPA applications. It’s designed to
conservatively handle 25A of output current for 5V and at high levels of efficiency (5V @ 91%). It provides tight regulation
and exhibits clean and monotonic output start up characteristics. The ALQ25’s come with industry standard features such as
Input UVLO, OCP, OVP, OTP, Output Trim, differential output Sense pins.
Special Features
• Industry Standard ¼ Brick Footprint
• Positive and Negative Enable Options
• Regulation to Zero Load
• High Capacitive Load Start-up
• Fixed Switching Frequency at 200kHz
• Output Trim
• Input Under-Voltage Lockout
• Low profile / open-frame
Environmental Specifications
• -40ºC to 85ºC Operating Temperature
(200LFM)
• -40ºC to 120ºC Storage Temperature
• MTBF > 1 million hours
Electrical Parameters
Input
Input Range
Input Surge
Efficiency
36-75 VDC
100V / 100ms
91% (Typ)
Control
Enable
TTL compatible
(Positive and Negative Enable Options)
Output
Load Current
Load Regulation
Ripple and Noise
5.0V @ 25A max
Line Regulation 0.2 % Vo
0.4 % V_O
150mV_PK-PK max for 5V
Output Voltage
Adjust Range
Transient Response
Remote Sense
Over Current
Protection
±10% V_O
5% V_O deviation (Typ)
50% to 75% Load Change
400µsec settling time (Typ)
+10% V_O
140% I_O,MAX
Safety
UL + cUL 60950, Recognized (Pending)
EN60950 through TUV-PS (Pending)
MODEL: ALQ25 SERIES
Dec 1, 2003 - REVISION B
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