Technical Reference Notes
AEO40x48 / ALO40x48 Series
(Single Output 8
th
Brick)
AEO40x48 / ALO40x48 Single Output 8
th
Brick: Baseplate or Open-Frame Module
The AEO40x48 / ALO40x48 series is Astec’s High Current 8
th
Brick industry standard offering. Operating from an input
voltage range of 36V to 75V, the series provides 7 configured outputs starting from 1.2V all the way up to 12V. It delivers up
to 40A max current for 1.8V and lower at impressive levels of efficiency. It provides tight regulation and exhibits clean and
monotonic output start up characteristics. The AEO_ALO series comes with industry standard features such as Input UVLO;
non-latching OCP, OVP and OTP; Output Trim; Differential Remote Sense pins. Both baseplate (AEO) and open frame (ALO)
construction are available as well as TH or SMT termination. With its wide operating temperature range of -40°C to 85°C
ambient, the converters are deployable into almost any environment.
Electrical Parameters
Input
Input Range
Input Surge
36-75 VDC
100V / 100ms
Control
Enable
TTL compatible
(Positive or Negative Logic Enable Options)
Output
Load Current
Line/Load Regulation
Ripple and Noise
Output Voltage
Adjust Range
Transient Response
Up to 40A max (V
O
≤
1.8V)
< 1% V
O
15mV
P-P
typical at 1.8V
±10% V
O
2% Typical deviation
50% to 75% Load Change
20µs settling time (Typ)
+10%V
O
120% max
130% max
110
°C
Special Features
•
•
•
•
•
•
•
•
Industry Standard 8
th
Brick Footprint
Baseplate or Open frame construction
Low Ripple and Noise
Regulation to zero load
High Capacitive Load Start-up
Fixed Switching Frequency
Industry standard features: Input UVLO;
Enable; non-latching OVP, OCP and OTP;
Output Trim, Differential Remote Sense
Meets Basic Insulation
Remote Sense
Over Current
Protection
Over Voltage
Protection
Over Temperature
Protection
Environmental Specifications
•
•
•
-40ºC to 85ºC Operating Temperature
-40ºC to 125ºC Storage Temperature
MTBF > 1 million hours
Safety
UL + cUL 60950, Recognized
EN60950 through TUV-PS
MODEL: AEO40x48 / ALO40x48 SERIES
JANUARY 13, 2005 - REVISION A2 (PRELIMINARY)
SHEET 1 OF 18
Technical Reference Notes
AEO40x48 / ALO40x48 Series
(Single Output 8
th
Brick)
Electrical Specifications
ABSOLUTE MAXIMUM RATINGS
Stresses in excess of the absolute maximum ratings can cause permanent damage to the converter. Functional
operation of the device is converter is not implied at these or any other conditions in excess of those given in the
operational section of the specs. Exposure to absolute maximum ratings for extended period can adversely affect
device reliability.
Parameter
Input Voltage
Continuous
Transient (100ms)
I/O Isolation
Input-to-Output
Operating Temperature
Storage Temperature
Operating Humidity
Max Voltage at Enable Pin
Max Output Power
1
Device
All
Symbol
Vin
Vin
trans
-
T
A
T
STG
-
P
O,MAX
Min
-0.3
-
1500
-40
-55
10
-0.6
-
-
-
-
-
-
-
Typical
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Max
75
100
-
85
125
85
25
120.0
100.0
99.0
88.0
72.0
60.0
48.0
Unit
Vdc
All
All
All
All
All
B (12V0)
A (5V0)
F (3V3)
G (2V5)
Y (1V8)
M (1V5)
K (1V2)
Vdc
ºC
ºC
%
Vdc
W
INPUT SPECIFICATION
Parameter
Operating Input Voltage Range
Input Under-Voltage Lock-out
T_ON Threshold
T_OFF Threshold
Max Input Current
2
Device
All
All
B (12V0)
A (5V0)
F (3V3)
G (2V5)
Y (1V8)
M (1V5)
K (1V2)
All
All
Iin
max
Symbol
V
IN
Min
36
33
31
-
-
-
-
-
-
-
I
I1
-
Typical
48
34
32
-
-
-
-
-
-
-
10
Max
75
36
34
TBA
3.5
3.5
3.3
TBA
TBA
TBA
4
30
Unit
Vdc
Vdc
A
Standing Loss
Input Ripple Current
3
W
mAp-p
MODEL: AEO40x48 / ALO40x48 SERIES
JANUARY 13, 2005 - REVISION A2 (PRELIMINARY)
SHEET 2 OF 18
Technical Reference Notes
AEO40x48 / ALO40x48 Series
(Single Output 8
th
Brick)
Electrical Specifications (continued)
OUTPUT SPECIFICATIONS
Parameter
Output Voltage Set point
V
IN
= V
IN,MIN
to V
IN,MAX
I
O
= I
O,MAX
Device
B (12V0)
A (5V0)
F (3V3)
G (2V5)
Y (1V8)
M (1V5)
K (1V2)
All
Symbol
V
O,SET
Min
11.80
4.90
3.25
2.45
1.76
1.47
1.17
-
-
Typical
12.00
5.00
3.30
2.50
1.80
1.50
1.20
0.1
0.1
Max
12.20
5.10
3.35
2.55
1.84
1.53
1.23
0.2
0.5
Unit
Vdc
Output Regulation
Line
V
IN
= V
IN,MIN
to V
IN,MAX
Load
V
IN
= V
IN,NOM
I
O
= I
O,MIN
to I
O,MAX
Temp
V
IN
= V
IN,NOM
; I
O
= I
O,MAX4
Output Ripple and Noise
5
Peak-to-Peak
I
O
= I
O,MAX
; V
IN
=V
IN,NOM
;
BWL = 20 MHz; T
A
=25
o
C
-
-
%
-
-
0.5
1.0
Output Current
6
Output Current-limit Inception
V
O
= 90% V
O,NOM
; T
A
= 25 ºC
V
IN
= V
IN,NOM
Non-latching / auto-recovery
External Load Capacitance
I
O
= I
O,MAX
, resistive load
ESR
B (12V0)
A (5V0)
F (3V3)
G (2V5)
Y (1V8)
M (1V5)
K (1V2))
B (12V0)
A (5V0)
F (3V3)
G (2V5)
Y (1V8)
M (1V5)
K (1V2)
B (12V0)
A (5V0)
F (3V3)
G (2V5)
Y (1V8)
M (1V5)
K (1V2)
All
B (12V0)
A (5V0)
F (3V3)
-
-
-
-
-
-
-
-
I
O
I
O,OCP
C
EXT
0
0
0
0
0
0
0
11.5
24.0
33.0
42.0
46.0
46.0
46.0
-
-
-
-
4
50
40
40
20
15
15
15
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
120
90
75
75
50
50
50
10
20
30
35
40
40
40
17.0
32.0
41.5
47.0
60.0
60.0
60.0
20,000
2000
10,000
10,000
-
mVp-p
A
A
µF
mΩ
MODEL: AEO40x48 / ALO40x48 SERIES
JANUARY 13, 2005 - REVISION A2 (PRELIMINARY)
SHEET 3 OF 18
Technical Reference Notes
AEO40x48 / ALO40x48 Series
(Single Output 8
th
Brick)
Electrical Specifications (continued)
OUTPUT SPECIFICATIONS
Parameter
Efficiency
V
IN
= V
IN,NOM
; I
O
= I
O,MAX
T
A
= 25 ºC;
Device
B (12V)
A (5.0V)
F (3.3V)
G (2.5V)
Y (1.8V)
M (1.5V)
K (1.2V)
B (12V)
A (5.0V)
F (3.3V)
G (2.5V)
Y (1.8V)
M (1.5V)
K (1.2V)
AEO
ALO
All
5V, 12V
All
5V, 12V
All
5V
12V
All
All
All
All
Symbol
η
η
η
η
η
η
η
V
O,OVP
Min
91
92
90
89
87
85
84
13.8
5.8
3.8
2.9
2.1
1.8
1.4
110
110
-
-
-
Typical
92
93
91
90
88
86
85
14.4
6.0
4.0
3.0
2.2
1.9
1.5
-
-
-
-
-
-
3.0
4.0
9.0
450
-
0
Max
93
94
93
92
89
87
86
15.0
6.2
4.3
3.2
2.4
2.0
1.6
120
120
17
20
17
20
9.0
11.0
16.0
520
10
110
3
Unit
%
Output Over Voltage Protection
Non-latching / autorecovery
V
Over Temperature Protection
Autorecovery
Input to Output Turn-On Delay
V
IN
= V
IN,NOM,
I
O
= I
O,MAX
Enable to Output Turn-On Delay
V
IN
= V
IN,NOM,
I
O
= I
O,MAX
Output Voltage Rise Time
10% to 90% of V
O,NOM
V
IN
= V
IN,NOM,
I
O
= I
O,MAX
Switching Frequency
Output Voltage Remote Sensing
Output Voltage Trim Range
7
Output Voltage Overshoot
Dynamic Response
di/dt = 0.1 A/µs
Peak Deviation
∆I
O
= 50% to 75% of Io
max
°C
ms
ms
-
-
-
-
-
F
SW
-
-
-
-
-
380
-
90
-
ms
kHz
%V
O
%V
O
%Vo
All
-
-
2
5
%
µs
%
µs
All
Settling Time
Vref = Vo
nom
Peak Deviation
∆I
O
= 50% to 25% of Io
max
Settling Time
Vref = Vo
nom
All
All
-
-
-
-
-
-
20
2
20
100
5
100
MODEL: AEO40x48 / ALO40x48 SERIES
JANUARY 13, 2005 - REVISION A2 (PRELIMINARY)
SHEET 4 OF 18
Technical Reference Notes
AEO40x48 / ALO40x48 Series
(Single Output 8
th
Brick)
Electrical Specifications (continued)
OUTPUT SPECIFICATIONS
Parameter
Output Enable ON/OFF
Open collector TTL compatible
Positive Enable: Mod-ON
Mod-OFF
Negative Enable: Mod-ON
Mod-OFF
Note:
Device
Symbol
Min
Typical
Max
Unit
All
All
All
All
-
-
-
-
2.95
-0.50
-0.50
2.95
-
-
-
-
20
1.20
1.20
20
V
V
V
V
1. Derating curves for both openframe and baseplate modules are based on derated component junction
temperatures of 120
o
C or less where applicable.
2. An input line fuse is recommended for use (e.g. Little Fuse Type 314 - 6A max, 250V min).
3. External input capacitance required. See Input Ripple Current test measurement setup on Fig 1.
4. Max output current should meet the appropriate derating curves.
5. Refer to Fig 2 for output ripple measurement setup.
6. Appropriate Thermal Derating applies.
7. Refer to the output trim equations provided (Equation 1 and 2).
SAFETY AGENCY / MATERIAL RATING / ISOLATION
Parameter
Safety Approval
8
Material Flammability Rating
Parameter
Input to Output Capacitance
Input to output Resistance
Input to Output Insulation Type
Device
All
All
Device
All
All
All
UL/cUL 60950, 35d Edition – Recognized (PENDING)
EN 60950 through TUV (PENDING)
UL94V-0
Symbol
Min
Typical
Max
Unit
-
1000
-
pF
-
TBD
-
Ohms
-
Basic
-
-
Note:
8. Safety approval for 3.3V version is complete.
MODEL: AEO40x48 / ALO40x48 SERIES
JANUARY 13, 2005 - REVISION A2 (PRELIMINARY)
SHEET 5 OF 18
Embedded System
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