Astec Industry Standard W9959_02_DCDC_001-073_73 2/8/02 3:19 PM Page 28 20 Watts Total Power: Input Voltages: No. of Outputs: AA20C 20 Watts 48V Single Electrical Specs Input Input range Input capacitance No load input power Efficiency 36 to 75 VDC 1.6µF typ (48 models) 150mW max 84% typical (5V) Output Voltage tolerance Overall regulation Noise/ripple Short circuit protection Overvoltage protection Transient response ±1.0% ±2% max 1% (mV P-P) Continuous Power Cycle Zener Clamp (125% of nom) 1 msec typical (50% step load change to within 1%Vo) Temperature Coefficient ±0.02 °C Switching frequency 400kHz Special Features • • • • • • 20 W, Single output 2:1 Input range Unencapsulated package 1.6" x 2.0" x 0.38 case Replaces AA20B series Industry standard package Isolation I/O isolation Isolation resistance Isolation capacitance 1500 VDC 1 x 109 (Ohms) 220pF Environmental Operating base temperature range: -40°C to +105°C (full load, no derating) Storage temperature: -55°C to +125°C Humidity: 5% to 95% (non-condensing) EMI RFI Shielding: Six sided (except 033-M1) MTBF: 361,000 hours (MIL HDBK-217) Safety 28 UL UL1950 Recognition CSA CSA22.2-950 Recognition TUV EN60950 Recognition America’s (USA): 1-888-41-ASTEC Europe (UK): 44 (1384) 842-211 Asia (HK): 852-2437-9662 W9959_02_DCDC_001-073_73 2/8/02 3:19 PM Page 29 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 AA20C Ordering Information Input Voltage Output Voltage Efficiency Model Number 36-75 V 36-75 V 36-75 V 3.3V @ 6.0 A 5.0V @ 4.0 A 12V @ 2.0 A 79% 84% 87% AA20C-048L-0335-M1 AA20C-048L-050S AA20C-048L-120S NOTES: Enable Function "1" = negative logic enable (std, without "1 or 4" = no enable) "4" = positive logic enable (std, without "1 or 4" = no enable) Trim Feature "9" = Trim feature (std, without "9" no Trim) Pin Assignments Single Output 1. 2. 3. 4. 5. 6. 7. 8. +Vin -Vin No pin Enable No pin Output 1 COM Trim 0.40 (10.15) 0.15 MIN (3.81) 0.40 (1.01) DIA TYP 0.10 (2.54) Note: 2.00 (50.80) 1.80 (45.72) Pins 0.040 in Dia x 0.15 in min Warranty: 1 yr 0.20 (5.08) 5 0.70 (17.75) .40 (10.16) 6 SINGLE OUTPUT 1.60 (40.64) 6 TRIM DOWN 0.40 (10.16) 6 8 8 ADJ. TRIM .40 (10.16) 1 0.20 (5.08) 2 7 .40 (10.16) 3 4 8 7 Astec Industry Standard TRIM UP BOTTOM VIEW 7 ALL DIMENSIONS ARE IN INCHES (mm) 8 www.astec.com Case Material: Metal base/cover Weight: 2.0 oz./56 grams. 29