-1-
A
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s
3.3V
3.3V,5V
,5V,5.2V
,5.2V,8V
,8V,12V
,12V,15V Single Output
,15V Single Output
10W DC-DC Converter
10W DC-DC Converter
REV02
REV02
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-2-
Introduction
Introduction
The AEE series of switching DC-DC converters
is one of the most cost effective options avail-
able in component power. The AEE uses an
industry standard package size and pinout con-
figuration, but has a lower profile than most
competitive products. This allows users the
additional headroom often needed in card cage
configurations, or can be used to improve air-
flow and cooling efficiency.
AEE converters come in 24V or 48V input ver-
sions, each of which uses a 2:1 input range.
Outputs are isolated from the input and single
or dual output versions are available.AEE con-
verters are capable of providing up to 10 watts
of output power.
At startup, input current passes through an
input filter designed to help meet CISPR 22
level A radiated emissions, and Bellcore
GR1089 conducted emissions. A fuse should
be used in line with the input to the module.
The AEE converters are pulse width modulated
(PWM) and operate at a nominal fixed frequen-
cy of 330 kHz. Feedback to the PWM controller
uses an opto-isolator, maintaining complete
isolation between primary and secondary.
Caution should be taken to avoid ground loops
when connecting the converter to ground.
Design Features
Design Features
2” X 1” package
High efficiency
High power density
10 watts of output power
2:1 wide input of 18-36V and 36-72V
Output short circuit protection
Output current limiting
Wide operating case temperature range:
-25°C~ +95°C
Application
Application
DATACOM equipment
Computer equipment
Distributed power architecture
Communications equipment
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AA
AAEE
EEEE
EE-
-22
2244
44SS
SS//
//44
4488
88SS
SS
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
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tt
T
Typical Application
ypical Application
Note: For the min. load requirement of AV10-24S/48S series, see ordering information on Page 4.
Recommended :
L1: 10-12µH
C1: m 47µF/100V electrolytic capacitor
C2: 1µF/100V metal film or ceramic high frequency capacitor
(The detailed information about C1 and C2 can refer to the paragraph “ Input Filter“ on page 16.)
C3: See the “Output Filter“ on page 18.
C4: 1µF ceramic capacitor
AA
AAEE
EEEE
EE00
0011
11LL
LL22
2244
44//
//LL
LL44
4488
88
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
uutt
tt
-3-
Fuse
-Vo
+Vo
-Vin
+Vin
Load
C4 C3
Vin
L1
C1
C2
Block Diagram
Block Diagram
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1000
1000
100
100
100
1000
2200
100
100
330
100
Output
Capacitor
(uF)
AA
AAEE
EEEE
EE00
0011
11LL
LL22
2244
44//
//LL
LL44
4488
88
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
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-4-
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Model Numbering
Model Numbering
Ordering Information
Ordering Information
AEE02F24 24 0.62 0.13 2.5 20 75 77 3.3
AEE02A24 24 0.72 0.1 2 20 100 78 5
AEE01L24 24 0.72 0.02 1.25 20 100 80 8
AEE00B24 24 0.7 0.04 0.84 20 100 82 12
AEE00C24 24 0.7 0.03 0.67 20 100 82 15
AEE02F48 48 0.31 0.13 2.5 20 75 77 3.3
AEE02A48 48 0.36 0.1 2 20 100 80 5
AEE02A48-5.2 48 0.36 0.05 2 20 100 78 5 . 2
AEE01L48 48 0.72 0.02 1.25 20 100 80 8
AEE00B48 48 0.35 0.04 0.84 20 100 85 12
AEE00C48 48 0.35 0.03 0.67 20 100 85 15
24: Input Voltage
Output Voltage: 8V
Output Current: 1A
Series
Enhanced Thermals
1 X 2 Thru Hole
A E E 01 - L 24
ModeI Input Input Output Ripple Noise Efficiency Output
Number Voltage Current(A) Current(A) (mV rms) (mV pp) typ Voltage
(V) Max Min Max Max Max (%) (V)
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AA
AAEE
EEEE
EE00
0011
11LL
LL22
2244
44//
//LL
LL44
4488
88
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
uutt
tt
-5-
Absolute Maximum Rating
Input Voltage(continuous) 40/80 Vdc 24Vin/48V in
Input Voltage(peak/surge) 50/100 Vdc 24V in/48Vin,100ms non-repetitive
Case temperature -25 95 °C
storage temperature -40 105 °C
Input Characteristics
Input Voltage Range 18 24 36 Vdc For 24V in
36 48 72 Vdc For 48Vin
Input Reflected Current 10 %Iin
T urn-of f Input Voltage Vdc
T urn-on Input Voltage Vdc
T urn On Time 250 ms
General Specifications
MTBF 3,730 k Hrs Bellcore TR332, Tcase=30°C
Isolation 500 Vdc
Pin solder temperature 260 °C wave solder < 10 s
Hand Soldering T ime 5 s iron temperature 425°C
Weight 24 grams
Characteristic Min Typ Max Units Notes
Characteristic Min Typ Max Units Notes
Characteristic Min Typ Max Units Notes
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AEE02F24 / F48 Output Characteristics
Power 10 W
Output Current 2.55 A
Output Setpoint Voltage 3.23 3.3 3.37 Vdc Vin=24V/48V, Io=2.5A
Line Regulation 0.2 %Vo Vin=18~36V/36~72V, Io=2.5A
Load Regulation 1 %Vo Io=0~2.5A, Vin=24V/48V
Dynamic Response
50-75% load 250 mV Ta=25°C, di/dt=1A/10µs
500 µs Ta=25°C, di/dt=1A/10µs
50-25% load 250 mV Ta=25°C, di/dt=1A/10µs
500 µs Ta=25°C, di/dt=1A/10µs
Current Limit Threshold 2.8 3.0 3.6 A
Short Circuit Current A
Efficiency 75 77 % Vin=24V/48V, Io=2.5A, Ta=25°C
T rim Range %Vo
Over Voltage Protection Setpoint V
Temperature Regulation 0.02 %V o/°C
Ripple (rms) 20 mV ( 0 to 20MHz Bandwidth )
Noise (p-p) 75 mV ( 0 to 20MHz Bandwidth )
Switching Frequency 330 kHz
AA
AAEE
EEEE
EE00
0011
11LL
LL22
2244
44//
//LL
LL44
4488
88
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
uutt
tt
-6-
Characteristic Min Typ Max Units Notes
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AA
AAEE
EEEE
EE00
0011
11LL
LL22
2244
44//
//LL
LL44
4488
88
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
uutt
tt
-7-
AEE02A24/A48 Output Characteristics
Power 10 W
Output Current 2 A
Output Setpoint Voltage 4.95 5 5.05 Vdc Vin=24V/48, Io=2A
Line Regulation 0.2 %Vo Vin=18~36V/36~72V, Io=2A
Load Regulation 0.5 %Vo Io=0~2A, Vin=24V/36V
Dynamic Response
50-75% load 100 mV Ta=25°C, di/dt=1A/10µs
200 µs Ta=25°C, di/dt=1A/10µs
50-25% load 100 mV Ta=25°C, di/dt=1A/10µs
200 µs Ta=25°C, di/dt=1A/10µs
Current Limit Threshold 2.2 3 A
Short Circuit Current A
Efficiency 77/76 78/80 % Vin=24Vor48V, Io=2A, Ta=25°C
T rim Range %Vo
Over Voltage Protection Setpoint V
Temperature Regulation 0.02 %Vo/°C
Ripple (rms) 20 mV ( 0 to 20MHz Bandwidth )
Noise (p-p) 100 mV ( 0 to 20MHz Bandwidth )
Switching Frequency 330 kHz
Characteristic Min Typ Max Units Notes
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AA
AAVV
VV11
1100
00-
-22
2244
44SS
SS//
//44
4488
88SS
SS
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
uutt
tt
-8-
Tel: 28780808 fax: 28788578
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AV1048S5V2 Output Characteristics
Power 10 W
Output Current 2 A
Output Setpoint Voltage 5.5 5.2 5.25 Vdc Vin=24V/48, Io=2A
Line Regulation 0.2 %Vo Vin=18~36V/36~72V, Io=2A
Load Regulation 0.5 %Vo Io=0~2A, Vin=24V/36V
Dynamic Response
50-75% load 200 mV Ta=25°C, di/dt=1A/10µs
200 µs Ta=25°C, di/dt=1A/10µs
50-25% load 200 mV Ta=25°C, di/dt=1A/10µs
200 µs Ta=25°C, di/dt=1A/10µs
Current Limit Threshold 2.2 3 A
Short Circuit Current A
Efficiency 76 78 % Vin=24Vor48V, Io=2A, Ta=25°C
T rim Range %Vo
Over Voltage Protection Setpoint V
Temperature Regulation 0.02 %Vo/°C
Ripple (rms) 20 mV ( 0 to 20MHz Bandwidth )
Noise (p-p) 100 mV ( 0 to 20MHz Bandwidth )
Switching Frequency 330 kHz
Characteristic Min Typ Max Units Notes
AA
AAEE
EEEE
EE00
0011
11LL
LL22
2244
44//
//LL
LL44
4488
88
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
uutt
tt
AEE01L24/L48 Output Characteristics
Power 10 W
Output Current 1.25 A
Output Setpoint Voltage 7.92 8 9.08 Vdc Vin=24V/48v, Io=1.25A
Line Regulation 0.2 %Vo Vin=18~36V/36~48, Io=0.84A
Load Regulation 0.5 %Vo Io=0~0.84A, Vin=24V/48V
Dynamic Response
50-75% load 120 mV Ta=25°C, di/dt=1A/10µs
200 µs Ta=25°C, di/dt=1A/10µs
50-25% load 120 mV Ta=25°C, di/dt=1A/10µs
200 µs Ta=25°C, di/dt=1A/10µs
Current Limit Threshold 1.5 2 A
Short Circuit Current A
Efficiency 78 80 % Vin=24/48V, Io=1.25A,Ta=25°C
T rim Range %Vo
Over Voltage Protection Setpoint V
Temperature Regulation 0.02 %Vo/°C
Ripple (rms) 20 mV ( 0 to 20MHz Bandwidth )
Noise (pp) 100 mV ( 0 to 20MHz Bandwidth )
Switching Frequency 330 kHz
-9-
Characteristic Min Typ Max Units Notes
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AEE00B24/B48 Output Characteristics
Power 10 W
Output Current 0.84 A
Output Setpoint Voltage 11.88 12 12.12 Vdc Vin=24V/48v, Io=0.84A
Line Regulation 0.2 %Vo Vin=18~36V/36~48, Io=0.84A
Load Regulation 0.5 %Vo Io=0~0.84A, Vin=24V/48V
Dynamic Response
50-75% load 100 mV Ta=25°C, di/dt=1A/10µs
200 µs Ta=25°C, di/dt=1A/10µs
50-25% load 100 mV Ta=25°C, di/dt=1A/10µs
200 µs Ta=25°C, di/dt=1A/10µs
Current Limit Threshold 0.93 1.26 A
Short Circuit Current A
Efficiency 81/81 82/85 % Vin=24/48V, Io=0.84A,Ta=25°C
T rim Range %Vo
Over Voltage Protection Setpoint V
Temperature Regulation 0.02 %Vo/°C
Ripple (rms) 20 mV ( 0 to 20MHz Bandwidth )
Noise (pp) 100 mV ( 0 to 20MHz Bandwidth )
Switching Frequency 330 kHz
AA
AAEE
EEEE
EE00
0011
11LL
LL22
2244
44//
//LL
LL44
4488
88
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
uutt
tt
-10-
Characteristic Min Typ Max Units Notes
www.astec.com
USA Europe Asia
TEL: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662
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AA
AAEE
EEEE
EE00
0011
11LL
LL22
2244
44//
//LL
LL44
4488
88
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
uutt
tt
-11-
AEE00C24/C48 Output Characteristics
Power 10 W
Output Current 0.67 A
Output Setpoint Voltage 14.85 15 15.15 Vdc Vin=24/48V, Io=0.67A
Line Regulation 0.2 %Vo Vin=18~36V/36~72V, Io=0.67A
Load Regulation 0.5 %Vo Io=0~0.67A, Vin=24V/48V
Dynamic Response
50-75% load 100 mV Ta=25°C, di/dt=1A/10µs
200 µs Ta=25°C, di/dt=1A/10µs
50-25% load 100 mV Ta=25°C, di/dt=1A/10µs
200 µs Ta=25°C, di/dt=1A/10µs
Current Limit Threshold 0.74 1 A
Short Circuit Current A
Efficiency 81/81 82/85 % V in=24/48V, Io=0.67A, Ta=25°C
T rim Range %Vo
Over Voltage Protection Setpoint V
Temperature Regulation 0.02 %Vo/°C
Ripple (rms) 20 mV ( 0 to 20MHz Bandwidth )
Noise (pp) 100 mV ( 0 to 20MHz Bandwidth )
Switching Frequency 330 kHz
Characteristic Min Typ Max Units Notes
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Characteristic Curves
Characteristic Curves
AA
AAEE
EEEE
EE00
0011
11LL
LL22
2244
44//
//LL
LL44
4488
88
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
uutt
tt
-12-
Efficiency (%)
Output Current (amps)
AEE02F24
AEE02A24
AEE01L24
AEE00B24
AEE00C24
Typical Efficiency Curves
AEE 48V input Series
Efficiency (%)
Output Current (amps)
AEE02F48
AEE02A48/5V2
AEE01L48
AEE00BF48
AEE00C48
Input Current (amps)
Input V oltage (volts)
AEE02F24
AEE02A24
AEE00B24
AEE00C24
AEE01L24
Input Current (amps)
Input V oltage (volts)
AEE00C48
AEE02F48
AEE02A48-5V2
AEE01L48
AEE00B48
Typical Input Current
AEE 24input Series Typical Input Current
AEE 48input Series
Typical Efficiency Curves
AEE 24V input Series
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AA
AAEE
EEEE
EE00
0011
11LL
LL22
2244
44//
//LL
LL44
4488
88
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
uutt
tt
-13-
Characteristic Curves
Characteristic Curves
Output V oltage (volts)
Output Current (amps)
AEE02F24
AEE02A24
AEE01L24
7
8
Typical Overcurrent Curves
AEE02-01 F/A/L 48
Output V oltage (volts)
Output Current (amps)
AEE02F48
AEE02A48/-5V2
AEE01L48
7
8
Output V oltage (volts)
Output Current (amps)
AEE00B24
AEE00C24
Output Voltage (volts)
Output Current (amps)
AEE00B48
AEE00C48
Typical Overcurrent Curves
AEE 00B/C 24 Typical Overcurrent Curves
AEE 00B/C 48
Typical Overcurrent Curves
AEE02-01 F/A/L 24
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AA
AAEE
EEEE
EE00
0011
11LL
LL22
2244
44//
//LL
LL44
4488
88
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
uutt
tt
-14-
T
Transient response
ransient response (rated input voltage, step load, at 25 °C)
(rated input voltage, step load, at 25 °C)
Typical Transient Response to Step Load
Change from 50%-25%Iomax
AEE00B24
Typical Transient Response to Step Load
Change from 50%-75%Iomax
AEE00B24
Typical Output Startup From Power On
AEE00B24 Typical Output Startup From Power On
AEE00B48
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Characteristic
Characteristic
AA
AAEE
EEEE
EE00
0011
11LL
LL22
2244
44//
//LL
LL44
4488
88
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
uutt
tt
-15-
Typical Output Ripple and Noise
AEE 48V Input
Measurement of reflected noise current (with an
simulated source impedance of 12 uH, and current
is detected at the input of the module)
C2 C1
L
Measurement of output ripple (p-p)
ground wire loop
0
20
40
60
80
100
706050403020100-10-20
Ambient Temperature in degrees C
Percent maximum output power
Safe Operating Area
80 90
Maximum Case Temperature
100
Derating Curves
AEE 48V Input
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AA
AAEE
EEEE
EE00
0011
11LL
LL22
2244
44//
//LL
LL44
4488
88
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
uutt
tt
-16-
Pin Location
Pin Location
The +Vin and -Vin input connection pins are
located as shown in Figure 1. AEE converters
have a 2:1 input voltage range of 18-36V or 36-
72V.
Care should be taken to avoid applying
reverse polarity to the input which can dam-
age the converter.
Input Characteristic
Input Characteristic
Fusing
Fusing
The AEE series power module has no inter-
nal fuse. An external fuse must always be
employed!
To meet international safety requirements, a
250 V olt rated fuse should be used. If one of the
input lines is connected to chassis ground, then
the fuse must be placed in the other input line.
Standard safety agency regulations require
input fusing. Recommended fuse ratings for the
AEE series are shown in Table 1.
T
Table 1
able 1
Input Reverse V
Input Reverse Voltage Protection
oltage Protection
Under installation and cabling conditions where
reverse polarity across the input may occur,
reverse polarity protection is recommended.
Protection can easily be provided as shown in
Figure 2. In both cases the diode rating is rated
for 2A/100V.
Placing the diode across the inputs rather
than in-line with the input offers an advan-
tage in that the diode only conducts in a
reverse polarity condition, which increases
circuit efficiency and thermal performance.
Input Filter
Input Filter
Input filters are included in the converters to
help achieve standard system emissions certifi-
cations. Some users however, may find that
additional input filtering is necessary. The AEE
series has an internal switching frequency of
330 kHz so a high frequency capacitor mount-
ed close to the input terminals produces the
best results. To reduce reflected noise, a
capacitor can be added across the input as
shown in Figure 3, forming a πfilter. A
Fig.1 Pin Location
Series Fuse Rating
24Vin 2A
48Vin 1A
+Vin
-Vin
+Vin
-Vin
Fig.2 Reverse Polarity Protection Circuits
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AA
AAEE
EEEE
EE00
0011
11LL
LL22
2244
44//
//LL
LL44
4488
88
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
uutt
tt
-17-
47µF/100V electrolytic capacitor is recom-
mended for C1.
For conditions where EMI is a concern, a differ-
ent input filter can be used. Figure 4 shows an
input filter designed to reduce EMI effects. L1 is
a 12 µH differential inductor, C1is a 47µF/100V
electrolytic capacitor, and C2 is a 1µF/100V
metal film or ceramic high frequency capacitor.
When a filter inductor L1 is connected in series
with the power converter input, an input capac-
itor C2 should be added. An input capacitor C2
should also be used when the input wiring is
long, since the wiring can act as an inductor.
Failure to use an input capacitor under these
conditions can produce large input voltage
spikes and an unstable output.
Input-Output
Input-Output
Characteristic
Characteristic
Isolation
Isolation
The isolation voltage between input to output,
input to case and case to output are all greater
than 500 Volt DC. If the system using the power
module needs to meet safety agency approval,
certain rules must be followed in the design of
the system using the module. In particular, all of
the creepage and clearance requirements of
the end-use safety requirement must be
observed. These documents include EN60950,
UL-1950, and CSA 22.2-960. Also specific
applications need to receive other or additional
requirements.
Safety Consideration
Safety Consideration
For safety-agency approval of the system in
which the power module is used, the power
module must be installed in compliance with the
spacing and separation requirements of the
end-use safety agency standard, i.e., UL1950,
CSA C22.2 No. 950-95, and EN60950. The
input-to-output 500VDC isolation is an opera-
tional insulation. The DC/DC power module
should be installed in end-use equipment, in
compliance with the requirements of the ulti-
mate application, and is intended to be supplied
by an isolated secondary circuit. When the sup-
ply to the DC/DC power module meets all the
requirements for SELV(<60Vdc), the output is
considered to remain within SELV limits (level
3). If connected to a 60Vdc power system, dou-
ble or reinforced insulation must be provided in
the power supply that isolates the input from
any hazardous voltages, including the ac
mains. One Vi pin and one Vo pin are to be
grounded or both the input and output pins are
to be kept floating. Single fault testing in the
power supply must be performed in combina-
tion with the DC/DC power module to demon-
strate that the output meets the requirement for
SELV. The input pins of the module are not
operator accessible.
Note: Do not ground either of the input pins of
the module, without grounding one of the output
pins. This may allow a non-SELV voltage to
appear between the output pin and ground.
+Vin
-Vin
C1
Fig.3 Ripple Rejection Input Filter
+Vin
-Vin
C1
C2
L1
Fig.4 EMI Reduction Input Filter
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AA
AAEE
EEEE
EE00
0011
11LL
LL22
2244
44//
//LL
LL44
4488
88
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
uutt
tt
-18-
Output Characteristics
Output Characteristics
Minimum Load Requirements
Minimum Load Requirements
There is 3% minimum load required for the AEE
series modules.
Overcurrent Protection (OCP)
Overcurrent Protection (OCP)
AEE series DC/DC converters feature foldback
current limiting as part of their Overcurrent
Protection (OCP) circuits. When output current
exceeds 110 to 150% of rated current, such as
during a short circuit condition, the output will
shutdown.
Note: If input voltage exceeds 60V, the con-
tinuous shortcircuit may damage the mod-
ule or decrease its life.
When the overcurrent condition is removed, the
converter will automatically restart.
Output Filters
Output Filters
When the load is sensitive to ripple and noise,
an output filter can be added to minimize the
effects. A simple output filter to reduce output
ripple and noise can be made by connecting a
capacitor C3 across the output as shown in
Figure 6. The recommended output capacitor is
100uF/25V aluminum (or tantalum) electrolytic
capacitor.
Extra care should be taken when long leads or
traces are used to provide power to the load.
Long lead lengths increase the chance for
noise to appear on the lines. Under these con-
ditions a capacitor C4 can be added across the
load as shown in Figure 7. The recommended
component for C4 is 1µF ceramic capacitor.
Decoupling
Decoupling
Noise on the power distribution system is not
always created by the converter. High speed
analog or digital loads with dynamic power
demands can cause noise to cross the power
inductor back onto the input lines. Noise can be
reduced by decoupling the load. In most cases,
connecting a 10 µF tantalum capacitor in paral-
lel with a 0.1µF ceramic capacitor across the
load will decouple it. The capacitors should be
connected as close to the load as possible.
Output V oltage (volts)
AEE00B24
AEE00C24
Fig.5 Overcurrent Foldback
+Vout
-Vout
Load
C3
Fig.6 Output Ripple Filter
+Vout
-Vout
Load
C3C4
Fig.7 Output Ripple Filter For a Distant
Load
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AA
AAEE
EEEE
EE00
0011
11LL
LL22
2244
44//
//LL
LL44
4488
88
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
uutt
tt
-19-
Design Considerations
Design Considerations
Ground Loops
Ground Loops
Ground loops occur when different circuits are
given multiple paths to common or earth
ground, as shown in Figure 8. Multiple ground
points can slightly different potential and cause
current flow through the circuit from one point to
another. This can result in additional noise in all
the circuits. To eliminate the problem, circuits
should be designed with a single ground con-
nection as shown in Figure 9.
Parallel Power Distribution
Parallel Power Distribution
Figure 10 shows a typical parallel power distri-
bution design. Such designs, sometimes called
daisy chains, can be used for very low output
currents, but are not normally recommended.
The voltage across loads far from the source
can vary greatly depending on the IR drops
along the leads and changes in the loads clos-
er to the source. Dynamic load conditions
increase the potential problems.
Radial Power Distribution
Radial Power Distribution
Radial power distribution is the preferred
method of providing power to the load. Figure
11 shows how individual loads are connected
directly to the power source. This arrangement
requires additional power leads, but it avoids
the voltage variation problems associated with
the parallel power distribution technique.
Mixed Distribution
Mixed Distribution
In the real world a combination of parallel and
radial power distribution is often used. Dynamic
and high current loads are connected using a
radial design, while static and low current loads
can be connected in parallel. This combined
approach minimizes the drawbacks of a parallel
design when a purely radial design is not feasi-
ble.
+Vout
-Vout
Load Load
RLine
RLine RLine
RLine
RLine
RLine
Ground
Loop
Fig.8. Ground Loops
Fig.9 Single Point Ground
+Vout
-Vout
Load Load
RLine
RLine RLine
RLine
RLine
Load 1 Load 2 Load 3
+Vout
-Vout
RL1 RL2 RL3
RG1 RG2 RG3
I1 + I2 + I3I2 + I3I3
RL = Lead Resistance
RG = Ground Lead Resistance
Fig.10 Parallel Power Distribution
Load 1 Load 2 Load 3
+Vout
-Vout
RL1 RL2
RL3
RG1 RG2
RG3
RL = Lead Resistance
RG = Ground Lead Resistance
Fig.11 Radial Power Distribution
Load 1 Load 2 Load 3
+Vout
-Vout
RL1 RL2
RL3
RG1 RG2
RG3
RL = Lead Resistance
RG = Ground Lead Resistance
Load 4
RL4
RG4
Fig.12 Mixed Power Distribution
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AA
AAEE
EEEE
EE00
0011
11LL
LL22
2244
44//
//LL
LL44
4488
88
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
uutt
tt
-20-
Redundant Operation
Redundant Operation
A common requirement in high reliability sys-
tems is to provide redundant power supplies.
The easiest way to do this is to place two con-
verters in parallel, providing fault tolerance but
not load sharing. Oring diodes should be used
to ensure that failure of one converter will not
cause failure of the second. Figure 13 shows
such an arrangement. Upon application of
power, one of the converters will provide a
slightly higher output voltage and will support
the full load demand. The second converter will
see a zero load condition and will “idle”. If the
first converter should fail, the second converter
will support the full load. When designing
redundant converter circuits, Shottky diodes
should be used to minimize the forward voltage
drop. The voltage drop across the Shottky
diodes must also be considered when deter-
mining load voltage requirements.
Module Derating
Module Derating
Thermal Derating
Thermal Derating
AEE single and dual output converters are
rated for full power up to a case temperature
of 95°C. Under typical conditions this equates
to an ambient temperature of 65°C. For opera-
tion above ambient air temperatures of 65°C,
output power must be derated as shown in
Figure 14, or airflow over the converter must
be provided. When airflow is provided, the
case temperature of the converter should be
used to determine maximum temperature lim-
its. The minimum operating temperature for
the AEE is -25°C. Operation at temperatures
as low as -40°C is possible, but output perfor-
mance below -25°C is not specified.
Mechanical
Mechanical
Considerations
Considerations
Installation
Installation
Although AEE series converters can be mount-
ed in any orientation, free air-flowing must be
taken. Normally power components are always
put at the end of the airflow path or have the
separate airflow paths. This can keep other
system equipment cooler and increase compo-
nent life spans.
Soldering
Soldering
AEE series converters are compatible with
standard wave soldering techniques. When
wave soldering, the converter pins should be
preheated for 20-30 seconds at 110°C, and
wave soldered at 260°C for less than 10 sec-
onds.
When hand soldering, the iron temperature
+Vout
-Vout
+Vout
-Vout
Load
Fig.13 Redundant Operation
0
20
40
60
80
100
706050403020100-10-20
Ambient Temperature in degrees C
Percent maximum output power
Safe Operating Area
80 90
Maximum Case Temperature
100
Fig.14 Derating Curves
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AA
AAEE
EEEE
EE00
0011
11LL
LL22
2244
44//
//LL
LL44
4488
88
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
uutt
tt
-21-
should be maintained at 425°C and applied to the converter pins for less than 5 seconds. Longer
exposure can cause internal damage to the converter. Cleaning can be performed with cleaning sol-
vent IPA or with water.
MTBF
MTBF
The MTBF, calculated in accordance with Bellcore TR-NWT-000332 is 3,730,000 hours. Obtaining this
MTBF in practice is entirely possible. If the ambient air temperature is expected to exceed +25°C, then
we also advise a oriented for the best possible cooling in the air stream.
Emerson Network Power can supply replacements for converters from other manufacturers, or offer
custom solutions. Please contact the company for details.
Mechanical Chart
Mechanical Chart (pin-side view)
(pin-side view)
-Vin
+Vin
-Vo
+Vo
Tolerances:
Inches Millimeters
.xx !0.020 .x !0.5
.xxx !0.010 .xx !0.25
Pins
>4mm !0.02inch ( !0.5mm)
<4mm !0.01inch ( !0.25mm)
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AA
AAVV
VV11
1100
00-
-22
2244
44SS
SS//
//44
4488
88SS
SS
DD
DDCC
CC-
-DD
DDCC
CC
CC
CCoo
oonn
nnvv
vvee
eerr
rrtt
ttee
eerr
rrss
ss
11
1188
88-
-33
3366
66VV
VVdd
ddcc
cc
aa
aann
nndd
dd
33
3366
66-
-77
7722
22VV
VVdd
ddcc
cc
II
IInn
nnpp
ppuu
uutt
tt,,
,,
11
1100
00
WW
WWaa
aatt
tttt
tt
SS
SSii
iinn
nngg
ggll
llee
ee
OO
OOuu
uutt
ttpp
ppuu
uutt
tt
-22-
Tel: 28780808 fax: 28788578
www.emersonnetworkpower.com.cn
