North America (USA): 1-888-41-ASTEC
Europe (UK): 44 (1384) 842-211
Asia (HK): 852-2437-9662
1
Electrical Specs
Special Features
100Watts
ALH25-Dual
Ultra High Efficiency
100W Output loadsharing
48VDC input
Open frame 2.3"x2.4"x0.50"pkg.
-40C to +120Cboard 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
Environmental
Operating PCB temperature range:
-40C to +120C
Storage temperature: -55C to +125C
Weight: 80 grams
Input
Input range
36-75 VDC (48Vdc Nom.)
Efficiency
88% typical
Input reverse
Voltage protection
Fuse recommended 3A.MB
Input Surge voltage
100V for 100ms
Output
Voltage tolerance
+/-1%
Line regulation
+/-0.2%
Load regulation
+/-0.5%
Ripple/noise
200mV P-P
Temperature coefficient
+/-0.02%/C (max)
Transient response
3% Vo max recovery <500msec
(50% to 75% step load change)
Switching frequency
250 kHz typical
Control
Enable
on = 1.2Vdc Max (Neg Enable)
off = 3Vdc Min (Neg Enable)
Ref. to -Vin. TTL compatible
Input current (enable off)
<2ma.
Output trim
Both outputs +/-10% minimum
Isolation
I/O isolation
1500Vdc
Safety
UL
UL 1950
CAN22.2-950
TUV
EN60950
Total Power:
100 Watts
Input Voltages: 48 V
No. of Outputs: Dual
Astec Industry Standard
EUROPE
Astec House, Waterfront Business Park
Merry Hill, Dudley
West Midlands, DY5 1LX, UK
Telephone: 44 (1384) 842-211
Facsimile: 44 (1384) 843-355
AMERICAS
5810 Van Allen Way
Carlsbad, CA 92008
Telephone: 760-930-4600
Facsimile: 760-930-0698
2
Ordering Information
www.astecpower.com
ASIA
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
Input
Output 1
Output 2
Model Number
Voltage
Voltage / Current
Voltage / Current
36-75V
5.0V @ 20A
3.3V @ 25A
ALH25AF48N
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.
-Vin
CNT
+Vin
+Vo2
-Vo2
Trim2
25.4 (1.0)
4.8 (0.19)
48.26 (1.9)
10.16 (0.4)
10.16 (0.4)
7.62 (0.3)
57.9 (2.28)
61.0 (2.4)
7.62 (0.3)
7.62 (0.3)
7.62 (0.3)
10.2 (0.4)
+Vo1
-Vo1
Trim1
12.70 (0.5)
12.7 (0.5)
5.8(0.23)*
5-
1.0 (0.04)
except Vo pins
only +Vo and -Vo pins
4-
1.5 (0.06)
Pin Assignments
Astec Industry
ALH25AF48N
Dual Outputs
1. -Vin
2. Not present on this converter
3. Control (on/off)
4. +Vin
5. +Vo2
6. -Vo2
7. TRM2
8. +Vo1
9. -Vo1
10. TRM1
Notes:
1. 20 MHz bandwidth. An external 2.20mF ceramic capacitor is
recommended to be placed from +Vout to -Vout.
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: 1yr
Revision date: 20040929
Rev02
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