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
24V Input, 2.5V, 3.3V, 5V Single 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: 20020703
AEH 24V Input
H
alf-
B
rick Series Power Converters
2 . 5 V, 3 . 3 V, 5 V S i n g l e O u t p u t , 5 0 - 1 5 0 W
Introduction
The AEH 24Vin series comes in a industry stan-
dard half-brick package of
2.4" x 2.28" x 0.5"
and footprint. The AEH 24Vin series is available
with 2:1 input range of 18-36V. Outputs of 2.5V,
3.3V, and 5V are fully isolated from input and
the isolation voltage is 1500Vdc.
The typical
efficiencies are 88% for the 5V output, 87%
for the 3.3V output, and 86% for the 2.5V
output.
Designed using a synchronous rectification
topology, AEH 24Vin series incorporates simple
structure, good electrical performance and high
reliability. 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
.
The AEH 24Vin series is designed to meet
CISPR22, FCC Class A, UL, TUV, and CSA
certifications.
Design Features
!
!
!
!
!
!
!
!
!
!
!
!
!
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
!
!
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 24V Input
H
alf-
B
rick Series Power Converters
2 . 5 V, 3 . 3 V, 5 V S i n g l e O u t p u t , 5 0 - 1 5 0 W
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 output : 10A fuse
75W output : 15A fuse
100W output : 20A fuse
150W output : 30A 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 4700p
F/2000V
C4:
Recommended 1
µF/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 24V Input
H
alf-
B
rick Series Power Converters
2 . 5 V, 3 . 3 V, 5 V S i n g l e O u t p u t , 5 0 - 1 5 0 W
Block Diagram
+Vin
+Vout
-Vin
-Vout
+Sense
Trim
CNT
-Sense
Ordering Information
Model
Number
AEH10G24(N)
AEH10F24(N)
AEH10A24(N)
*AEH15G24(N)
*AEH15F24(N)
*AEH15A24(N)
AEH20G24(N)
AEH20F24(N)
AEH20A24(N)
*AEH30G24(N)
*AEH30F24(N)
*AEH30A24(N)
Input
Voltage
18-36V
18-36V
18-36V
18-36V
18-36V
18-36V
18-36V
18-36V
18-36V
18-36V
18-36V
18-36V
Output
Voltage
2.5V
3.3V
5V
2.5V
3.3V
5V
2.5V
3.3V
5V
2.5V
3.3V
5V
Output
Current
10A
10A
10A
15A
15A
15A
20A
20A
20A
30A
30A
30A
Ripple
(mV rms)
40
40
40
40
40
40
40
40
40
40
40
40
Noise
(mV pp)
150
150
150
150
150
150
150
150
150
150
150
150
Efficiency
min
typ
84%
85%
86%
84%
85%
86%
84%
85%
86%
84%
84%
86%
86%
87%
88%
86%
87%
88%
86%
87%
88%
86%
86%
88%
*: detailed information referring to the factory
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 24V Input
H
alf-
B
rick Series Power Converters
2 . 5 V, 3 . 3 V, 5 V S i n g l e O u t p u t , 5 0 - 1 5 0 W
Absolute Maximum Rating
Characteristic
Input Voltage(continuous)
Input Voltage(peak/surge)
Operating temperature
storage temperature
Min
-0.3
-0.3
-40
-55
Typ
Max
40
50
100*
125
Units
Vdc
Vdc
°C
°C
100ms non-repetitive
*:case temperature
Notes
Input Characteristics
Characteristic
Input Voltage Range
Input Reflected Current
Turn-off Input Voltage
Turn-on Input Voltage
Turn On Time
14
15
Min
18
Typ
24
25
15.5
16.5
15
Max
36
80
17
18
25
Units
Vdc
mAp-p
V
V
ms
Notes
Control Function
Characteristic
Logic High
Logic Low
Control Current
Min
3
-0.7
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
1880
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
