Technical Reference Note
ASA (10W) Family
ASA (10W) Isolated DC/DC Converter Module
Industry Standard Size, 1.25”x0.8”x0.4”
18-36V/36-75V Inputs, 2.5V/3.3V/5V/12V Outputs
The ASA (10W) Isolated DC/DC Converter is Astec’s 2:1 input voltage family for low power applications. With efficiency up
to 82% typical for 5V module, this product is allowed to work at operating temperature range from -40ºC to 60ºC and an
input voltage range of 2:1. Single-output models are available for a wide range of applications in telecommunication,
transportation equipment, etc.. Housed in small package, 1.25”x0.8”x0.4”, with industry standard pinout, 24-pin DIP, ASA
family eases the PCB designs and mechanical designs of customers’ end products.
Electrical Parameters
Input
Input range
Efficiency
18-36 VDC; 36-75 VDC
82%@ 5V (Typical)
Output
Regulation
(Line, Load, Temp)
Ripple and noise
<2%
2% typical
(100mV p-p max@ 5V)
Transient Response
6% max deviation with
50% load to full load
300uS (max) recovery
Short Circuit Protection Indefinite
Industry Standard Size
1.25”
×0.80” ×
0.40”
Special Features
•
•
•
•
•
•
•
•
High efficiency, 82%@5V
-40°C to 85°C case surface operating temperature
Input / Output isolation 1.5KVdc
Low output ripple and noise
Shielded metal case with size (1.25”x0.8”x0.4”)
Industrial standard pinout (24-pin DIP)
Lead-free soldering pins
Fixed switching frequency (350KHz)
Safety
Designed to meet EN60950 (up to SELV limit)
Environmental Specifications
•
•
•
•
Operating temperature: -40°C to +60°C
Storage temperature: -55°C to +105°C
MTBF: >800K hours
ROHS Compliant (Rev02 or above)
DATE: February 2006
MODEL : ASA
Series
SHEET 1 / 15
Technical Reference Note
ASA (10W) Family
ASA (10W) SERIES
THIS SPECIFICATION COVERS THE REQUIREMENTS
FOR AN INDUSTRY STANDARD PACKAGE OF 1.25”x0.8”x0.4”,
2:1 INPUT RANGE, 10W, SINGLE OUTPUT ISOLATED DC/DC CONVERTER
PART NUMBERS
MODEL NAME / SIS CODE
ASA03G24
ASA03F24
ASA02A24
ASA00B24
ASA03G48
ASA03F48
ASA02A48
ASA00B48
Nominal Vin /
Range of Vin
24V / 18-36V
24V / 18-36V
24V / 18-36V
24V / 18-36V
48V / 36-75V
48V / 36-75V
48V / 36-75V
48V / 36-75V
Vout / Iout
2.5V / 3A
3.3V / 3A
5V / 2A
12V / 0.833A
2.5V / 3A
3.3V / 3A
5V / 2A
12V / 0.833A
DATE : February 2006
MODEL : ASA
Series
SHEET 2 / 15
Technical Reference Note
ASA (10W) Family
ELECTRICAL SPECIFICATIONS
Unless otherwise indicated, specifications apply over all operating input voltage and temperature conditions.
Standard test condition on a single unit.
Tambient :
+Vin :
−Vin
:
+Vout :
−Vout
:
25°C
24V
±2%
(ASAxxxx24)
48V
±2%
(ASAxxxx48)
return pin for +Vin
connect to load
connect to load (return)
ABSOLUTE MAXIMUM RATINGS
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute
stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess of
those given in the operational sections of the IPS. Exposure to absolute maximum ratings for extended periods can
adversely affect device reliability.
Parameter
a) Input Voltage:
Continuous:
Transient (100ms)
Continuous:
Transient (100ms)
b) Operating Temperature
Ambient
Case Surface
c) Storage Temperature
d) Operating Humidity
e) I/O Isolation
(Conditions : 0.5mA for 60 sec)
Input-Output
f) Output Power
Device
ASAxxx24
ASAxxx24
ASAxxx48
ASAxxx48
All
All
All
Symbol
V
I
V
I, trans
V
I
V
I, trans
Ta
Tc
T
STG
-
Min
0
0
0
0
-40
-40
-55
-
Typ
-
-
-
-
-
-
-
-
Max
36
44
75
88
60
90
105
95
Unit
Vdc
Vdc
Vdc
Vdc
ºC
ºC
ºC
%
All
2.5V
Others
-
Po,max
Po,max
-
-
-
-
-
-
1500
7.5
10
Vdc
W
W
DATE : February 2006
MODEL : ASA
Series
SHEET 3 / 15
Technical Reference Note
ASA (10W) Family
OUTPUT SPECIFICATIONS
Parameter
a) Output Voltage Setpoint
(V
I
= V
I,min
to V
I,max
: Io = I
o,,max
;
T
A
= 25 ºC)
Device
2.5V
3.3V
5V
12V
Symbol
V
o,set
V
o,set
V
o,set
V
o,set
Min
2.45
3.23
4.90
11.76
Typ
2.50
3.30
5.00
12.00
Max
2.55
3.37
5.10
12.24
Unit
V
dc
V
dc
V
dc
V
dc
b) Output Regulation:
Line (V
I
= V
I,max
toV
I,min
; Io = I
o,,max
)
Load (V
I
= V
I,,nom
; Io = I
o,min
to I
o,max
)
Temperature
(Tc = -40 ºC to +85ºC)
c) Output Ripple and Noise
(Across 1µF @50V, X7R ceramic capacitor
& 10µF @25V tantalum capacitor)
See Figure 1.
All
All
All
-
-
-
-
-
-
-
-
-
0.8
1.2
1.0
%
%
%Vo
Peak-to-Peak (5 Hz to 20 MHz)
d) Rated Output Current
Single Output
2.5V
3.3V
5V
12V
2.5V
3.3V
5V
12V
2.5V
3.3V
5V
12V
All
-
-
-
-
Io
Io
Io
Io
-
-
-
-
-
-
-
-
-
300
300
200
80
-
-
-
-
315
-
-
-
-
-
-
-
-
77
79
82
83
350
100
100
100
120
3000
3000
2000
833
-
-
-
-
385
mVp-p
mVp-p
mVp-p
mVp-p
mA
mA
mA
mA
%
%
%
%
KHz
e) Efficiency
(V
I
= V
I,nom
; I
o,max
; T
A
= 25°C)
f) Switching Frequency
DATE : February 2006
MODEL : ASA
Series
SHEET 5 / 15
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