Astec Industry Standard 300 Watts Total Power: Input Voltages: No. of Outputs: 300W (12V @ 25A) 48V Single ALQ25B50 DC Transfromer Electrical Specs Input Input Range1 Efficiency Over Voltage Protection Input UVLO1 42 to 53 VDC 96%@12V (Typ) 60V 39V to 42V Output Output Current Line Regulation Special Features • High efficiency (96% Typical) • -40°C to +100°C Ambient Air Operation • Industry standard package Qtr Brick 1.48" x 2.30" x 0.40" • High capacitive load limit on start-up • 12V @ 25A Intermediate Bus Voltage for DPA application • Regulation to zero load • Output Enable Pin • Meets Basic Insulation • Input UVLO and Overvoltage Protection • Over Temperature Protection Load Regulation Noise/Ripple2 Transient Response Over Current Limit1 Switching Frequency 0A to 25A max (300W output power) 10.25V to 13.60V 8.50V to 13.60V (for “-AL” option) ±3% Vo (Typical) 100mV (Typical) 200mV typical deviation 50% to 75% Load Change 100µs max recovery time 115% IO,MAX typical (latching) 800kHz Control Enable TTL compatible (Positive or Negative Enable Logic) Isolation Voltage Input to Output 2000Vdc max Environmental Ambient air operating temperature range: -40°C to +100°C Storage temperature: -55°C to +125°C Overtemperature protection: 115°C typical MTBF: > 1 million hours * Specifications are subject to change without notice. Safety UL, cUL 60950 TUV EN60950 1 North America (USA): 1-888-41-ASTEC Europe (UK): 44 (1384) 842-211Asia (HK): 852-2437-9662 AMERICAS EUROPE ASIA 5810 Van Allen Way Carlsbad, CA 92008 Telephone: 760-930-4600 Facsimile: 760-930-0698 Astec House, Waterfront Business Park Merry Hill, Dudley West Midlands, DY5 1LX, UK Telephone: 44 (1384) 842-211 Facsimile: 44 (1384) 843-355 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 ALQ25B50 Ordering Information Input Voltage Output Voltage Output Current Efficiency Model Number 42V 42V 42V 42V 36V 12.0V 12.0V 12.0V 12.0V 12.0V 25A* 25A* 25A* 25A* 25A* 96% Typ 96% Typ 96% Typ 96% Typ 96% Typ ALQ25B50 ALQ25B50-6 ALQ25B50N ALQ25B50N-6 ALQ25B50N-AL to to to to to 53V 53V 53V 53V 53V OPTIONS: Enable Function "N" = negative logic enable without "N" = positive logic enable (default) Pin Length Option “-6” = 3.7mm (nominal) Standard pin length is 5mm nominal Others “-AL” = Autorecovery mode and lower UVLO range (34V to 36Vdc) * Derating / airflow required at elevated ambient operating temperature, consult the Technical Rreference Notes Pin Assignments Single Output 1. 2. 3. 4. 5. + Vin Enable - Vin - Vout + Vout Notes: 5 4 0.15 [3.8] 1.04 [26.5] 2.00 [50.8] PIN ASSIGNMENT 0.60 [15.2] PIN SIDE UP 1 + Vin 2 Enable (On/Off) 3 -VIN 4 - Vout 5+ Vout NOTES: ALL DIMENSIONS ARE IN INCHES (MILLIMETERS) PIN PLACEMENT TOLERANCE : ± 0.005(0.127) MECHANICAL TOLERANCE ± .002(0.5) Astec Industry Standard www.astecpower.com 0.44 [11.2] 0.44 0.74 [11.2] [18.9] 4. All specifications are typical at nominal line, full load and 25oC ambient temp unless otherwise noted. Astec reserves the right to make changes to the information contained herein without notice and assumes no liability as a result of its use or application. (REV 01: APRIL 7, 2005) SIDE VIEW PIN SIDE DOWN 2. 20MHz BW limited with external 10uF tantalum cap. + 0.1uF ceramic cap across the output. 220uF low ESR cap required across the input pins. 6. Warranty: 1yr 0.04Ø[1.0Ø] 2 3 1. Part number suffix “-AL” designates: - 36V to 53V Input voltage range - lower UVLO range (34V to 36V) - Autorecovery mode after fault protection 5. Technical Reference Notes should be consulted for detailed information when available. 0.38 [9.6] 0.06 Ø[1.5Ø] 1 1.48 [37.6] 3. Output may need to be derated and airflow added when operating at elvetaed ambient temperature. 0.22 0.20 [5.5] [5.0] 2.30 [58.4] 2