North America (USA): 1-888-41-ASTEC
Europe (UK): 44 (1384) 842-211 Asia (HK): 852-2437-9662
1
Special Features
Electrical Specs
Special Features
Electrical Specs
66Watts
AEO/ALO25
High Efficiency
2.3" x 0.9" Industry Standard 8th brick outline
Baseplate or Openframe construction
Low Ripple and Noise
Regulation to zero load
High Capacitive Load start-up
Fixed Switching Frequency
Industry Standard features: Input UVLO with
hysteresis, Enable, OVP, OCP, OTP, Output
VoltageTrim, Differential Remote Sense
Meets Basic Insulation
Environmental
Operating ambient temperature: -40C to +85C
Storage temperature: -55C to +125C
MTBF: >1 million hours
Input
Input Range
36 to 75 VDC
Input Surge
100V /100ms
Efficiency
1
1.8V @ 90% (typical)
Output
Line / Load Regulation
< 0.1% V
O
Load Current
Up to 25A for Vo 1.8V
Ripple and Noise
2
20mV
PK-PK
at 1.8V
O
(typical)
Transient Response
2% typical deviation
50% to 75% step load
250ms settling time (typical)
Over Voltage Protection
130% V
O
Typ (autorecovery)
Over Current Protection
120% I
O,max
Typ (autorecovery)
Over Temperature
110C average PCB temperature
Protection
(autorecovery)
Switching Frequency
Fixed Frequency
Isolation Voltage
1500Vdc
Control
Output Voltage Trim
10% V
O
Enable
TTL compatible
(Positive or Negative Logic)
Safety
UL, cUL 60950 Recognized
TUV EN60950 Licensed
Total Power:
66 Watts
Input Voltages:
48V
No. of Outputs:
Single
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
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
Ordering Information
Input Voltage
Output Voltage
Output Current
Efficiency
1
Model Number
36V to 75V
12.0V
4A
93.0%
A(X)O04B48 (N) - (6)(S)
36V to 75V
5.0V
12A
93.0%
A(X)O12A48 (N) - (6)(S)
36V to 75V
3.3V
20A
91.0%
A(X)O20F48 (N) - (6)(S)
36V to 75V
2.5V
20A
90.0%
A(X)O20G48 (N) - (6)(S)
36V to 75V
1.8V
25A
90.0%
A(X)O25Y48 (N) - (6)(S)
36V to 75V
1.5V
25A
88.5%
A(X)O25M48(N) - (6)(S)
36V to 75V
1.2V
25A
87.0%
A(X)O25K48 (N) - (6)(S)
OPTIONS:
(X) : "L" = Open Frame / Low Profile
"E" = Baseplate Construction
(N) : "N" = designates Negative Logic Enable (default is Positive Enable with no suffix "N" required)
(6) : "-6"= 3.7mm nominal pin length (default is 5mm nominal pin length with no suffix "-6" required)
(S) : "-S"= Surface Mount Termination (default is Through Hole Termination with no suffix "-S" required)
Single Output
1. +Vin
2. Enable (On/Off)
3. -Vin
4. -V
OUT
5. -Sense
6. Trim
7. +Sense
8. +V
OUT
Notes:
1. Efficiency measurements taken at full load, nominal
line and TA = 25C.
2. 20 MHz bandwidth. External 10 uF tant. capacitor in
parallel with 1 uF ceramic capacitor placed across
the output and secondary return ground.
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. Technical Reference Notes should be consulted for
detailed information.
7. Warranty: 1yr.
Astec Industry Standard
AEO / ALO25
Pin Assignment
* 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 G: AUGUST 25, 2005).
0.75
[19.1]
2.19
[55.5]
0.15
[3.8]
0.30
[7.6]
0.45
[11.4] 0.60
[15.2] 0.75
[19.1]
0.15
[3.8]
0.45
[11.4]
0.31
[7.9]
0.15
[3.9]
0.32
[8.2]
0.15
[3.8]
0.30
[7.6]
0.45
[11.4]
0.60
[15.2]
0.75
[19.0]
0.15
[3.8]
0.45
[11.4]
0.75
[19.0]
2.00
[50.8]
0.40
[10.1]
0.23
[5.8]
0.15
PIN SIDE DOWN
0.39
[9.8]
0.15
[3.9]
ALO - OPENFRAME
SMT - Termination
AEO -BASEPLATE
SMT - Termination
TH - Termination
TH - Termination
See A
PIN LENGTH
A
Std Pin Length: 0.189 [4.8] MIN
0.205 [5.2] MAX
"-6" Option:
0.137 [3.5] MIN
0.152 [3.9] MAX
See A
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