66Watts Total Power: Input Voltages: No. of Outputs: 66 Watts 48V Single AEO/ALO25 High Efficiency Electrical Specs Input Input Range Input Surge 36 to 75 VDC 100V /100ms Efficiency2 1.8V @ 88.5% (typical) Output Line / Load Regulation < 0.1% VO (typical) Load Current Up to 25A for Vo 1.8V Noise/Ripple1 30mVPK-PK (typical) Transient Response Over Voltage Protection 2% typical deviation (50% to 75% Step Load) < 50s settling time (typ) 130% VO Typ (autorecovery) Over Current Protection 130% IO,max Typ (autorecovery) Over Temperature Protection Switching Frequency Isolation Voltage 115C average PCB temperature (autorecovery) Fixed Frequency 1500Vdc Special Features * * * * * * * 2.3" x 0.9" Industry Standard 8th brick outline Baseplate or Openframe construction Low Ripple and Noise1 < 30mVPK-PK Regulation to zero load High Capacitive Load start-up Fixed Frequency Switching for EMI predictability Industry Standard features: Input UVLO with hysteresis, Enable, OVP, OCP, OTP, Output VoltageTrim, Differential Remote Sense * Meets Basic Insulation Control Output Voltage Trim 10% VO,NOM Enable TTL compatible (Positive or Negative Logic) Environmental Operating Ambient Temperature Openframe: -40C to +85C Ambient Baseplate: -40C to +100C Case Storage temperature: -55C to +125C MTBF: > 1 Million Hrs Safety UL, cUL 60950 Recognized (Pending)6 TUV EN60950 Licensed (Pending)6 2 North America (USA): 1-888-41-ASTEC Europe (UK): 44 (1384) 842-211 Asia (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 36V to 75V 36V to 75V 36V to 75V 36V to 75V 36V to 75V 36V to 75V 36V to 75V OPTIONS: (X) : "L" = "E" = (N) : "N" = (6) : "-6" = (S) : "-S"= Efficiency2 Output Current 12.0V 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 4A 12A 20A 20A 25A 25A 25A Model Number 93.0% 92.0% 91.0% 90.0% 88.5% 86.5% 85.5% A (X)O04B48 (N) A (X)O12A48 (N) A (X)O20F48 (N) A (X)O20G48 (N) A (X)O25Y48 (N) A (X)O25M48(N) A (X)O25K48 (N) - (6)(S) (6)(S) (6)(S) (6)(S) (6)(S) (6)(S) (6)(S) Open Frame / Low Profile Baseplate Construction designates Negative Logic Enable (default is Positive Enable with no suffix "N" required) 3.7mm nominal pin length (default is 5mm nominal pin length with no suffix "-6" required) Surface Mount Termination (default is Through Hole Termination with no suffix "-S" required) ALO - OPENFRAME Pin Assignment 2.19 [55.5] 0.15 [3.8] Single Output 1. +Vin 2. Enable (On/Off) 3. -Vin 4. -VOUT 5. -Sense 6. Trim 7. +Sense 8. +VOUT 0.45 [11.4] 0.15 [3.8] 0.30 [7.6] 0.45 [11.4] 0.60 [15.2] 0.75 [19.1] 0.75 [19.1] SMT - Termination 0.15 [3.9] 0.31 [7.9] TH - Termination 0.32 [8.2] 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 taken at full load, nominal line and TA = 25C. 3. All specifications are typical at nominal line, full load and TA = 25C unless otherwise noted. 4. All specifications subject to change without notice. 5. Mechanical drawings are for reference only. Dimensions are in inches [mm]. Pin placement tolerance 0.005 [0.127]. Mechanical Tolerance 0.02 [0.5], recommended surface mount pads (min: 0.080 x 0.112 [2.03 x 2.84] / max: 0092 x 0.124 [2.34 x 3.15]); through hole pin diameter (Pins 4 & 8) = 0.062 [1.57], others = 0.04 [1.0] (6X). 6. Safety approval for 3.3V version is available. 7. Technical Reference Notes should be consulted for detailed information when available. 8. Warranty 1yr. PIN LENGTH See A "-6" Option: 0.137 [3.5] MIN 0.152 [3.9] MAX AEO -BASEPLATE 0.15 [3.8] A Std Pin Length: 0.189 [4.8] MIN 0.205 [5.2] MAX 2.00 [50.8] 0.15 [3.8] 0.30 [7.6] 0.45 [11.4] 0.45 [11.4] 0.75 [19.0] SMT - Termination 0.60 [15.2] 0.75 [19.0] 0.15 [3.9] 0.39 [9.8] PIN SIDE DOWN TH - Termination 0.40 [10.1] 0.23 [5.8] This is a Preliminary Data Sheet. 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 C: JANUARY 13, 2005). www.astecpower.com See A 0.15 3