AEO25Y48-L (Emerson)
DC-DC / Industry Standard Isolated Eighth Brick

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Embedded Power for
Business-Critical Continuity
AEO/ALO Series
66/120 Watts
Total Power: Up to 120 Watts
Input Voltage: 48V
# of Outputs: Single
Rev. 09.30.08_100
AEO/ALO Series
1 of 4
Special Features
• 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 Frequency Switching
for EMI predictability
• Industry Standard features:
Input UVLO with
hysteresis, Enable, OVP, OCP,
OTP, Output, VoltageTrim,
Differential Remote Sense
• Meets Basic Insulation
• EU Directive 2002/95/EC
compliant for RoHS
Electrical Specifications
Input
Input ra­nge:
36 - 75VDC
Input surge:
Input UVLO:
Efficiency2:
100V / 100ms
33-36 V (UVLO ON)
31-31 V (UVLO OFF)
93% @ 5V (typical)
Output
Line / Load Regulation:
Load Current:
<0.1% vo (typical)
Up to 25A for Vo < 1.8V
Noise / Ripple1:
Transient Response:
20mVPK-PK (typical for Vo < 2.5V)
2% typical deviation (50% to 75% Step Load)
<100us settling time (typ)
Over Voltage Protection:
Over Current Protection:
130% Vo typ (autorecovery)
130% Io,max typ (autorecovery)
Over Temperature Protection: 115°C average PCB temperature (autorecovery)
Switching Frequency:
Fixed Frequency
Isolation Voltage:
Control
1500Vdc
Output Voltage Trim:
Enable:
±10% VO,NOM
TTL compatible (Positive or Negative logic)
Safety
UL, cUL 60950-1 Recognized
TUV EN60950-1 Licensed


AEO25Y48-L (Emerson)
DC-DC / Industry Standard Isolated Eighth Brick

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Embedded Power for
Business-Critical Continuity
Environmental Specifications
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 hours
Rev. 09.30.08_100
AEO/ALO25 Series
 of 4
Ordering Information
120W Series
Output Voltage Output Voltage
12.0 V
5.0 V
10.0 A
20.0 A
3.3 V
2.5 V
30.0 A
35.0 A
1.8 V
1.5 V
40.0 A
40.0 A
1.2 V
40.0 A
66W Series
Output Voltage Output Voltage
12.0 V
4.0 A
5.0 V
3.3 V
2.5 V
1.8 V
1.5 V
1.2 V
12.0 A
20.0 A
20.0 A
25.0 A
25.0 A
25.0 A
Efficiency
93.0%
92.0%
91.0%
89.5%
88.0%
86.0%
85.0%
Efficiency
93.0%
92.0%
91.0%
90.0%
88.5%
86.5%
85.5%
Model Number
ALO10B48N-L
ALO20A48N-L
ALO30F48N-L
ALO35G48N-L
ALO40Y48N-L
ALO40M48N-L
ALO40K48N-L
Model Number
ALO4B48N-L
ALO12A48N-L
ALO20F48N-L
ALO20G48N-L
ALO25Y48N-L
ALO25M48N-L
ALO25K48N-L
Not for New Designs - Please check LES A Series
Not for New Designs - Please check LES A Series
Not for New Designs - Please check LES B Series
Not for New Designs - Please check LES B Series
Not for New Designs - Please check LES B Series
Not for New Designs - Please check LES B Series
Not for New Designs - Please check LES B Series
Not for New Designs - Please check LES B Series
Not for New Designs - Please check LES B Series
Not for New Designs - Please check LES B Series
Options
Construction
AL
L = Low Profile;
Openframe
E = Baseplate
Size
O
O = 8th Brick
Output Current Output Voltage
Input Voltage
Remote ON/OFF
Logic
PIN Length O/P
Termination
10
10 = 10 Amps
20 = 20 Amps
30 = 30 Amps
35 = 35 Amps
40 = 40 Amps
B
B = 12.0V
A = 5.0V
F = 3.3V
G = 2.5V
Y = 1.8V
M = 1.5V
K = 1.2V
48
48 = 48V
(36-75 V Range)
N
N = Negative
Blank = Positive
-6
Through Hole:
6 = 3.6mm
Blank = 5mm
S = Surface Mount*
*Available for Low
Profile; Openframe
(ALO) Version only
RoHS
Designation
L
L = RoHS 6/6
Blank = RoHS 5/6


AEO25Y48-L (Emerson)
DC-DC / Industry Standard Isolated Eighth Brick

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Embedded Power for
Business-Critical Continuity
Mechanical Drawing
OPEN FRAME THROUGH HOLE
0.90
[22.9]
+ Vin
0E.90
[22.9]
- Vin
+ Vin
E
- Vin
AALOLSEORIESS ETHRRUIEHOSLETPIHN RU HOLE PIN
2.30
[58.4]
2.30
[58.4]
PIN SIDPEINDOSWIDNE DOWN
+--+TOSrOSeiumnutepstnpuesute+--+tTOSrOSeiumnutepstnpuesutet
0.32 0.32
[8.2] [8.2]
0.45 0.45
[11.4]
[11.4]
0.15 0.15
[3.8] [3.8]
0.75
[19.0]
0.75
[19.0]
2.00
[50.8]
2.00
[50.8]
0.15 0.15
[3.8] [3.8]
0.30 0.30
[7.6] [7.6]
0.45 0.45
[11.4] 0.6[101.4] 0.60
[15.2]
0[1.755.2]
[19.0]
0.75
[19.0]
BASEPLATE THROUGH HOLE
PIN SIDPEINUPSIDE UP
AEO SERIES THRU HOLE PIN
+ Vin
0.90
[22.9]
E
- Vin
2.30
[58.4]
+ Vin
2.30
[58.4]
0.90
[22.9]
E
- Vin
+ Output
+ Sense
Trim
-Sense
-Output
PIN SIDE DOWN
PIN SIDE DOWN
0.40
[10.1]
0.23
[5.8]
SIDE VSIIEDWE VIEW
+ Output
+ Sense
Trim
-Sense
-Output
0.40
[10.1]
0.23
[5.8]
Rev. 09.30.08_100
AEO/ALO25 Series
 of 4
Pin Assignments
Single Output
1. +Vin
2. Enable (On/off)
3. -Vin
4. -VOUT
5. -Sense
6. Trim
7. +Sense
8. +VOUT
Notes:
1. Measured at 20 MHz bandwidth
with external 10 µF tant.
capacitor in parallel with 0.1 µF
ceramic capacitor connected
across
+Vout and -Vout; 220 µF e-cap or
equivalent connected across
+Vin and -Vin.
2. Efficiency measurements are
typical values 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) f = 0.062
[1.57], others f = 0.04 [1.0] (6X).
6. Technical Reference Notes should
be consulted for detailed
information when available.
8. Warranty 2yrs.
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
0.45
[11.4]
0.75
[19.0]
0.15
[3.8]
0.45
[11.4]
0.75
[19.0]
0.15
[3.8[25].00.08]
2.00
[50.8]
0.15
[3.8] 0.30
[7.6]
0.15
[3.8] 0.30
[7.6]
0.45
[11.4] 0.60
[15.2]
0.75
[19.0]
0.45
[11.4] 0.60
[15.2]
0.75
[19.0]
PIN SIDE UP
PIN SIDE UP
SIDE VIEW
SIDE VIEW


AEO25Y48-L (Emerson)
DC-DC / Industry Standard Isolated Eighth Brick

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Embedded Power for
Business-Critical Continuity
Mechanical Drawing
OPEN FRAME SURFACE MOUN2.3T0
[58.4]
+ Vin
0.90
[22.9] E
- Vin
+ Vin
ALO OPEN FRAME SMT PIN
+ Output
2.30
[58.4]
+ Sense
Trim
-Sense
-Output
0.90
[22.9] E
- VinPIN SIDE DOWN
+ Output
+ Sense
Trim
-Sense
-Output
PIN SIDE DOWN
0.31
[7.9]
0.45
[11.4]
0.75
[19.1]
0.31
[7.9]
0.15
[3.8]
2.19
[55.5]
0.45
[11.4]
0.75
[19.1]
0.15
[3.8]
PIN SIDE UP
2.19
[55.5]
0.15
[3.9]
0.15
[3.9]
0.15
[3.8]
0.30
[7.6]
0.15
[3.8]
0.45
[11.4] 0.60
0.30
[7.6]
[15.2] 0.75
[19.1]
0.45
[11.4] 0.60
[15.2] 0.75
[19.1]
SIDE VIEW
Rev. 09.30.08_100
­Americas
5810 Van Allen Way
AEO/ALO25 Series
 of 4
Carlsbad, CA 92008
USA
Telephone: +1 760 930 4600
Facsimile: +1 760 930 0698
+ Vin
Europe (UK)
Waterfront Business Park
0.90
[22.9] E
- Vin
Merry Hill, Dudley
West Midlands, DY5 1LX
United Kingdom
Telephone: +44 (0) 1384 842 211
Facsimile: +44 (0) 1384 843 355
Asia (HK)
14/F, Lu Plaza
2 Wing Yip Street
Kwun Tong, Kowloon
Hong Kong
Telephone: +852 2176 3333
Facsimile: +852 2176 3888
0.31
[7.9]
For global contact, visit:
www.powerconversion.com
techsupport.embeddedpower
@emerson.com
0.45
[11.4]
0.75
[19.1]
While every precaution has been taken to ensure
accuracy and completeness in this literature, Emerson
Network Power assumes no responsibility, and disclaims
all liability for damages resulting from use of this
information or for any errors or omissions.
0.15
[3.8]
PIN SIDE UP
SIDE VIEW Emerson Network Power.
The global leader in enabling
business-critical continuity.
AC Power
Connectivity
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Embedded Computing
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Outside Plant
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Emerson Network Power and the Emerson
Network Power logo are trademarks and
service marks of Emerson Electric Co.
©2008 Emerson Electric Co.




AEO25Y48-L.pdf
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