50 Amps ALQ50 Total Power: Input Voltages: No. of Outputs: 132W 48V Single High Efficiency Quarter Brick Electrical Specs Input Input Range Input Surge Efficiency 36 to 75 VDC 100V /100ms 3.3V @ 91% (typical) Output Line / Load Regulation Output Current Noise/Ripple1 Remote sense Transient Response Special Features • Industry standard Quarter Brick package 1.48" x 2.30" x 0.38" • Openfrmae low profile construction • High capacitive load start-up • Regulation to zero load • Fixed frequency switching for EMI predictability • Industry Standard Features: Input UVLO with hysteresis, Enable, OCP, OCP, OTP, Output Voltage Trim, Differential Remote Sense • Meets Basic Insulation Overvoltage Protection Over Current Protection Over Temperature Protection Switching Frequency Isolation Voltage < 0.3% Vo (typical) up to 50A max (3.3V at 40A max) 40mVPK-PK (typical) Up to 10% of Vo 100mV (typ) deviation 50% to 75% Load change 250µs (typ) recovery 130% typ for Vo < 3.3V 125% typ for 3.3V 120% Iout typ (autorecovery) 115C average PCB temperature (autorecovery) 480kHz 540kHz (2.5V output) 1500Vdc Control Environmental Voltage Voltage Trim ±10% VO,NOM Enable Postive or Negative Logic options Operating Ambient Temperature: -40°C to +85°C Storage Temperature: -40°C to +125°C MTBF: > 1 million hours Safety UL, cUL 60950 TUV 1 EN60950 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 Ordering Information Input Voltage Output Voltage Output Current Efficiency2 Model Number 36V 36V 36V 36V 3.3V 2.5V 1.8V 1.2V 40A 50A 50A 50A 91% Typ 90% Typ 89% Typ 86% Typ ALQ40F48 (N) ALQ50G48(N) ALQ50Y48 (N) ALQ50K48 (N) to to to to 75V 75V 75V 75V OPTIONS: (N) : "N" = designates Negative Logic Enable (default is Positive Enable with no suffix “N” required) Pin Assignments Single Output 1. 2. 3. 4. 5. 6. 7. 8. +Vin Enable (On/Off) -Vin -Vout -Sense Trim +Sense +Vout 2.30 [58.4] 0.36 [9.1] 0.20 [5.0] MIN 0.24 [6.0] MAX 0.06Ø[1.5Ø] 2 PLACES 1 1.48 [37.6] 8 7 6 5 4 2 3 0.04Ø [1.0Ø] 6 PLACES Notes: 1. 20 MHz bandwidth. External 10 uF tant. capacitor in parallel with 1 uF ceramic capacitor placed across the output and secondary return ground. 2. Efficiency measurements are typical values taken at full load, nominal line and TA = 25°C. 3. All specifications are typical at nominal line, full load and TA = 25°C unless otherwise noted. 4. All specifications subject to change without notice. 5. Mechanical drawings are for reference only. Dimensions are in inches [millimeters]. Pin placement tolerance ± 0.005 [0.127]. Mechanical Tolerance ± 0.02 [0.5]. ∅ = 0.060” for Pins 4&8, the rest are ∅ = 0.40”. 6. Technical Reference Notes should be consulted for detailed information when available. 7. Warranty 1yr. SIDE VIEW PIN SIDE DOWN PIN SIDE DOWN 2.00 [50.8] 0.15 [3.8] 0.44 0.74 [11.2] 1.04 [18.8] [26.4] 0.44 0.59 [11.2] [15.0] C L 0.74 0.89 [18.9] [22.7] 1.04 [26.5] PIN SIDE UP Astec reserves the right to make changes to the information contained herein without notice and assumes no liability as a result of its use and application. (REV 07: OCTOBER 19, 2004) www.astecpower.com 2