Astec Industry Standard
300W
AEH25
Ultra High Efficiency
Total Power:
Input Voltages:
No. of Outputs:
300 Watts (12V @ 25A)
48 V
Single
Electrical Specs
Input
Input range
Input Surge
Efficiency
36-75 VDC
100V / 100ms
93% @ 12V (Typical)
Control
Enable
TTL compatible
(positive or negative enable logic
control options)
Output
Regulation
(Line, Load, Temp)
<2%
120mV tyical
Up to 10%Vout
±10% of nominal output
180mV typical output deviation
25% step change
300 µS recovery time
115% nominal output
116% Io nominal
1500 Vdc
Special Features
•
•
•
•
•
•
•
•
High efficiency, 12V@ 93% (Typical)
Industry Standard Half Brick baseplate design
Low output ripple and noise
High capacitive load limit on start-up
Remote sense compensation
Regulation to zero load
Fixed frequency switching
Industry Std features: Input UVLO, OCP, OVP,
OTP; Short ckt protection; ±10% Output Adjust
• Positive or Negative enable logic control option
• Meets Basic Insulation
Ripple and Noise
1
Remote Sense
Output Voltage Adjust
Range
Transient Response
Overvoltage Protection
Overcurrent Protection
Isolation Voltage
Environmental
Operating temperature
-40°C to +100°C Baseplate
Storage temperature: -55°C to +125°C
Overtemperature protection: 110°C typical
MTBF: >1 million hours
Safety
UL, cUL 60950 Recognized
TUV
EN60950 Licensed
2
North America (USA): 1-888-41-ASTEC
Europe (UK): 44 (1384) 842-211Asia (HK): 852-2437-9662
AMERICAS
5810 Van Allen Way
Carlsbad, CA 92008
Telephone: 760-930-4600
Facsimile: 760-930-0698
EUROPE
Astec House, Waterfront Business Park
Merry Hill, Dudley
West Midlands, DY5 1LX, UK
Telephone: 44 (1384) 842-211
Facsimile: 44 (1384) 843-355
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
AEH25B48
Ordering Information
Input
Voltage
36V to 75V
OPTION:
Output
Voltage / Current
12V @ 25A
suffix “N”
non suffix “N”
suffix “-6”
suffix “-5”
default pin length
suffix “T”
=
=
=
=
=
=
Efficiency
Model Number
93%
AEH25B48(N)-(5)(6)(T)
Negative Enable
Positive Enable (default)
3.7mm pin length
4.5mm pin length
5mm nominal pin length
“Tuned” version for slow start up time
Typical efficiency measurement taken at nominal line, full load, 25°C ambient.
Pin Assignments
Single Output
1.
2.
3.
4.
5.
6.
7.
8.
9.
+Vin
Enable (On/Off)
Case (AEH)
-Vin
- Output
- Sense
Trim
+ Sense
+ Output
0.
20
[ 1]
5.
Notes:
1. 20 MHz BW with external 10uF/25V tantalum in
parallel with 0.1uF/50V X7R ceramic capacitor
placed across the output.
2. Requires a 2.2 uf, 100V film capacitor
connected between +V in and -V in to meet
FCC class A and ETS300-386-1 requirements
for conducted noise. Consult Factory for filtering
information to meet FCC class B, VDE or EIC
specifications.
3. All specifications are typical at nominal line, full
load, and 25°C unless otherwise noted.
4. All specifications subject to change without
notice. Mechanical drawings are for reference
only
5. Technical Reference Notes should be consulted
for detailed information when available
6. Warranty: 1yr
* Astec reserves the right to make changes to the information
contained herein without notice and assumes no liability as a
result of its use or application. (REV06: JANUARY 26, 2006)
2.
30
[ 4]
58.
1.
90
[ 3]
48.
PIN LENGTH OPTION
“-5”: 4.5mm nom
“-6”: 3.7mm nom
default is 5mm nom
M 3 X0. M OUNTI HOLE
5
NG
4 PLACES
0.
50
[ 7]
12.
0.
20
[ 2]
5.
see
A
2.
0.
08Ø [ 0Ø]2 PLACES
0.
20
[ 1]
5.
+ Vi
n
+ Out
put
1.
0.
04Ø [ 0Ø]7 PLACES
2.
00
2.
40
[ 8] [ 0]
50.
61.
-Vi
n
- put
Out
0.
46
[ 8]
11.
PI SI DOW N
N DE
0.
50
[ 7]
12.
1.
90
[ 3]
48.
0.
50
[ 7]
12.
SI VI
DE EW
Astec Industry Standard
PI ASSI
N
GNM ENT
0.
90
1.
20 [ 8]
22.
1.
50 [ 4]
30.
38.
1.
90 [ 1]
[ 3]
48.
4
5
3
6
7
2
9
1
0.
90
[ 9]
22.
1.
20
[ 5] 1.
30.
50
[ 2]
38.
1.
90
[ 3]
48.
PI SI UP
N DE
NOTE:
All dimensions are in Inches [millimeters]
NOTES:
Pin Placement Tolerance: ± 0.005 [0.127]
ALL DI ENSI
M
ONS ARE I I
N NCHES ( I M ETERS)
M LLI
Mechanical Tolerance: ± 0.002 [0.5]
0.
PI PLACEM ENT TOLERANCE :± 0.
N
005( 127)
M ECHANI
CAL TOLERANCE ± .
002( 5)
0.
1 + Vi
n
2 Enabl ( Of)
e On/ f
3 CASE
4 -Vi
n
5 - put
Out
6-
Sense
7 Trm
i
8 + Sense
9 + Out
put
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