North America (USA): 1-888-41-ASTEC Europe (UK): 44 (1384) 842-211 Asia (HK): 852-2437-9662
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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 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
Environmental
Operating Ambient Temperature
Openframe: -40°C to +85°C Ambient
Baseplate: -40°C to +100°C Case
Storage temperature: -55°C to +125°C
MTBF: > 1 Million Hrs
Input
Input Range 36 to 75 VDC
Input Surge 100V /100ms
Efficiency21.8V @ 88.5% (typical)
Output
Line / Load Regulation < 0.1% VO (typical)
Load Current Up to 25A for Vo ≤ 1.8V
Noise/Ripple130mVPK-PK (typical)
Transient Response 2% typical deviation
(50% to 75% Step Load)
< 50µs settling time (typ)
Over Voltage Protection 130% VOTyp (autorecovery)
Over Current Protection 130% IO,max Typ (autorecovery)
Over Temperature 115ºC average PCB temperature
Protection (autorecovery)
Switching Frequency Fixed Frequency
Isolation Voltage 1500Vdc
Control
Output Voltage Trim ±10% VO,NOM
Enable TTL compatible
(Positive or Negative Logic)
Safety
UL, cUL 60950 Recognized (Pending)6
TUV EN60950 Licensed (Pending)6
Total Power: 66 Watts
Input Voltages: 48V
No. of Outputs: Single
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
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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 Efficiency2Model Number
36V to 75V 12.0V 4A 93.0% A(X)O04B48 (N) -(6)(S)
36V to 75V 5.0V 12A 92.0% 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 88.5% A(X)O25Y48 (N) -(6)(S)
36V to 75V 1.5V 25A 86.5% A(X)O25M48(N) -(6)(S)
36V to 75V 1.2V 25A 85.5% 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. -VOUT
5. -Sense
6. Trim
7. +Sense
8. +VOUT
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= 25°C.
3. All specifications are typical at nominal line, full load
and TA= 25°C 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 Assignment
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).
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 APIN 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
