AEH Half-brick Series
Te c h n i c a l R e f e r e n c e N o t e s
48V Input, 2.5V Output
50-150W DC-DC Converter
(Rev01)
-1-
TEL:
FAX:
USA
1-760-930-4600
1-760-930-0698
Europe
44-(0)1384-842-211
44-(0)1384-843-355
Asia
852-2437-9662
852-2402-4426
Publishing Date: 20020702
AEH Half-Brick Power Converters
36VDC to 75VDC Input, 2.5V Output, 50-150W
Introduction
The AEH series comes in a industry standard
half-brick package of
2.4" x 2.28" x 0.5"
and
footprint, and incorporates the super high effi-
ciency up to 87% in 2.5V output and high power
density up to 54.8W/in
3
. The AEH series is
available with 2:1 input range of 36V-75V ( and
36V-72V is for 5V output ). Outputs of 2.5V,
3.3V, and 5V are fully isolated from input and
the isolation voltage is 1500Vdc.
The typical
efficiencies are 90% for the 5V output, 89%
for the 3V output, and 87% for the 2.5V out-
put.
Designed using a synchronous rectification
topology, AEH series incorporates simple struc-
ture, good electrical performance and high reli-
ability. Standard features include input LVP,
OCP, output OVP, short circuit protection, and
over-temperature protection. Using aluminum
based plate, the maximum case temperature
can reach 100 °C without derating.
The AEH series is designed to meet CISPR22,
FCC Class A, UL, TUV, and CSA certifications.
Design Features
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High Efficiency
High power density
Low output noise
Metal baseplate
CNT function
Remote sense
Trim function
Input under-voltage lockout
Output short circuit protection
Output current limiting
Output over-voltage protection
Overtemperature protection
High input-output isolation voltage
Options
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Heat sink available for extended operation.
Choice of CNT logic configuration.
TEL:
FAX:
USA
1-760-930-4600
1-760-930-0698
Europe
44-(0)1384-842-211
44-(0)1384-843-355
Asia
852-2437-9662
852-2402-4426
-2-
www.astec.com
AEH Half-Brick Power Converters
36VDC to 75VDC Input, 2.5V Output, 50-150W
Typical Application
Fuse*
+Vin
CNT
C1
Case
Trim
-Vout
-Vin
-Sense
+Sense
+Vout
Vin
C4
C2
Load
C3
Fuse*:
Use external fuse ( fast blow type ) for each unit.
50W rated output : 5A fuse
75W rated output : 7.5A fuse
100W rated output : 10A fuse
150W rated output : 20A fuse
C1:
Recommended input capacitor C1
-40 °C~ +100 °C:
m
47µF/100V electrolytic capacitor.
C2:
Recommended output capacitor C2
0°C~ +100°C: one 2200 µF/ 6.3V electrolytic capacitor
Below 0°C: use 1 X 220µF tantalum capacitor parallel with a 2200µF/ 6.3V electrolytic capacitor
C3:
Recommended 4700pF/2000V
C4:
Recommended 1µF/10V
TEL:
FAX:
USA
1-760-930-4600
1-760-930-0698
Europe
44-(0)1384-842-211
44-(0)1384-843-355
Asia
852-2437-9662
852-2402-4426
-3-
www.astec.com
AEH Half-Brick Power Converters
36VDC to 75VDC Input, 2.5V Output, 50-150W
Block Diagram
+Vin
+Vout
-Vin
-Vout
+Sense
Trim
CNT
-Sense
Ordering Information
Model
Number
AEH10G48N
AEH10G48
AEH15G48N
AEH15G48
AEH20G48N
AEH20G48
AEH30G48N
AEH30G48
Input
Voltage
36-75V
36-75V
36-75V
36-75V
36-75V
36-75V
36-75V
36-75V
CNT
Logic
Negative
Positive
Negative
Positive
Negative
Positive
Negative
Positive
Output
Current
10A
10A
15A
15A
20A
20A
30A
30A
Ripple
(mV rms)
40
40
40
40
40
40
40
40
Noise
(mV pp)
150
150
150
150
150
150
150
150
Efficiency
min
typ
84%
84%
83%
83%
85%
85%
83%
83%
86%
86%
85%
85%
87%
87%
85%
85%
TEL:
FAX:
USA
1-760-930-4600
1-760-930-0698
Europe
44-(0)1384-842-211
44-(0)1384-843-355
Asia
852-2437-9662
852-2402-4426
-4-
www.astec.com
AEH Half-Brick Power Converters
36VDC to 75VDC Input, 2.5V Output, 50-150W
Absolute Maximum Rating
Characteristic
Input Voltage(continuous)
Input Voltage(peak/surge)
Operating temperature
Storage temperature
Min
-0.3
-0.3
-40
-55
Typ
Max
80
100
100*
125
Units
Vdc
Vdc
°C
°C
100ms non-repetitive
*: case temperture
Notes
Input Characteristics
Characteristic
Input Voltage Range
Input Reflected Current
Turn-off Input Voltage
Turn-on Input Voltage
Turn On Time
30
31
Min
36
Typ
48
25
33
34
15
Max
75
50
35
36
25
Units
Vdc
mAp-p
V
V
ms
Notes
CNT Function
Characteristic
Logic High
Logic Low
Control Current
Min
3
Typ
Max
15
1.2
2
Units
Vdc
Vdc
mA
Notes
General Specifications
Characteristic
MTBF
Isolation
Pin solder temperature
Hand Soldering Time
Weight
70
Min
Typ
2080
1500
260
5
Max
Units
k Hrs
Vdc
°C
s
grams
wave solder < 10 s
iron temperature 425°C
Notes
Bellcore TR332, Tc=30°C
TEL:
FAX:
USA
1-760-930-4600
1-760-930-0698
Europe
44-(0)1384-842-211
44-(0)1384-843-355
Asia
852-2437-9662
852-2402-4426
-5-
www.astec.com
