Astec Industry Standard W9959_02_DCDC_001-073_73 2/8/02 3:38 PM Page 42 100 Watts ALH25-Dual Total Power: Input Voltages: No. of Outputs: 100 Watts 48V Dual Electrical Specs Input Input range Efficiency Input reverse Voltage protection Input surge voltage 36 to 75 VDC (48Vdc Nom.) 88% typical Fuse recommended 3A.MB 100V for 100mS Output Special Features * * * * * * * * * 100W Output loadsharing 48VDC Input Open Frame 2.3" x 2.4" x 0.50" pkg. -40 to 120C board temperature Trim feature, both rails Industry standard pin-out Enable (on/off) (pos or neg logic) OC, OV, OT protection 5.0V/3.3V dual outputs Voltage tolerance 1% Line regulation 0.2% Load regulation 0.5% Ripple/noise Temperature coefficient Transient response 200mV P-P +0.02%/C (max) 3% Vo max recovery <500msec (50% to 75% step load change) 250 kHz typical Switching frequency Control Enable Input current (enable off) Output trim Environmental on =1.2Vdc Max (Neg Enable) off = 3Vdc Min (Neg Enable) Ref. to -Vin. TTL compatible <2ma. Both outputs 10% minimum Isolation I/O isolation 1500 VDC Operating PCB temperature range: -40C to +120C Storage temperature: -55C to +125C Weight 80 grams Safety UL TUV 42 UL 1950 Pending CAN22.2-950 Pending EN60950 Pending 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 3:38 PM Page 43 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 ALH25-Dual Ordering Information Input Voltage Output 1 Voltage Output 2 Voltage Model Number 36 - 75VDC 5.0V @ 20A 3.3V @ 25A ALH25AF48 Note: Enable Function "N" = negative logic enable (without "N" = positive enable) 1. Maximum output power not to exceed 100W total for 5/3.3V version 20/25A). 2. Any output loading ratio within the maximum specified limits is possible. Pin Assignments Dual Output 1. -Vin 2. Case 3. Control (on/off) 4. Vin+ 5. V2 6. Rtn (V2) 7. Trim (V2) 8. V1 9. Rtn (V1) 10. Trim (V1) Notes: www.astec.com Astec Industry Standard 1. 20MHz bandwidth. An external 2.2mf ceramic capacitor is recommended to be placed from +V out to -V out. 2. Recommended External components below: C1 = 100uF/100V, C2=C4= metallic film .47uF/50V C3= C5 = Electrolytic 1000uF/10V, C6 = .01uF/1500V 3. All specifications are typical at nominal line, full load, and 25C unless otherwise noted. 4. All specifications subject to change without notice. Mechanical drawings are for reference only. 5. Please refer to the Technical Reference Notes for more information. 6. Warranty: 1 yr 43