DATE: April 2008 MODEL : ASA Series SHEET 1 / 19
Technical Reference Note
ASA (6W) Family
ASA (6W) Isolated DC/DC Converter Module
Industry Standard Size, 1.25”x0.8”x0.4”
9-36V/18-75V Inputs, 3.3V/5V/±5V/12V/±12V/15V/±15V Outputs
The ASA (6W) Isolated DC/DC Converter is Astec’s 4:1 wide input voltage family for low power applications. With
efficiency up to 81% typical for 5V module, this product is allowed to work at operating temperature range from -40ºC to
71ºC and a wide input voltage range of 4:1. Single-output models and dual-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.
Industry Standard Size
1.25” ×0.80” × 0.40”
Environmental Specifications
• Operating temperature: -40°C to +71°C
• Storage temperature: -55°C to +105°C
• MTBF: >1 million hours
• ROHS Compliant
Electrical Parameters
Input
Input range 9-36 VDC; 18-75 VDC
Efficiency 81%@ 5V (Typical)
Output
Regulation
(Line, Load, Temp) <2%
Ripple and noise 2% typical
(100mV p-p max@ 5V)
Transient Response 6% max deviation with
50% load to full load
250uS (max) recovery
Short Circuit Protection Indefinite
Special Features
•Wide 4：1 input range
• High efficiency, 81%@5V
• -40°C to 90°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 (200KHz)
Safety
Designed to meet EN60950 (up to SELV limit)
DATE : April 2008 MODEL : ASA Series SHEET 2 / 19
Technical Reference Note
ASA
(
6W
)
Famil
y
ASA (6W) SERIES
THIS SPECIFICATION COVERS THE REQUIREMENTS
FOR AN INDUSTRY STANDARD PACKAGE OF 1.25”x0.8”x0.4”, 4:1 INPUT RANGE,
4-6W, SINGLE OUTPUT AND DUAL OUTPUT ISOLATED DC/DC CONVERTER
PART NUMBERS
MODEL NAME / SIS CODE Nominal Vin /
Range of Vin Vout / Iout
ASA01F18-L 24V / 9-36V 3.3V / 1.2A
ASA01A18-L 24V / 9-36V 5V / 1A
ASA00AA18-L 24V / 9-36V ±5V / ±0.5A
ASA00B18-L 24V / 9-36V 12V / 0.5A
ASA00BB18-L 24V / 9-36V ±12V / ±0.25A
ASA00C18-L 24V / 9-36V 15V / 0.4A
ASA00CC18-L 24V / 9-36V ±15V / ±0.2A
ASA01F36-L 48V / 18-75V 3.3V / 1.2A
ASA01A36-L 48V / 18-75V 5V / 1A
ASA01AA36-L 48V / 18-75V ±5V / ±0.5A
ASA00B36-L 48V / 18-75V 12V / 0.5A
ASA00BB36-L 48V / 18-75V ±12V / ±0.25A
ASA00C36-L 48V / 18-75V 15V / 0.4A
ASA00CC36-L 48V / 18-75V ±15V / ±0.2A
DATE : April 2008 MODEL : ASA Series SHEET 3 / 19
Technical Reference Note
ASA
(
6W
)
Famil
y
ELECTRICAL SPECIFICATIONS
Unless otherwise indicated, specifications apply over all operating input voltage and temperature conditions.
Standard test condition on a single unit.
Tambient : 25°C
+Vin : 24V ±2% (ASAxxxx18-L)
48V ±2% (ASAxxxx36-L)
−Vin : return pin for +Vin
+Vout : connect to load
−Vout : 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 Device Symbol Min Typ Max Unit
a) Input Voltage:
Continuous:
Transient (100ms)
ASAxxxx18-L
ASAxxxx18-L
VI
VI, trans
0
0
-
-
36
50
Vdc
Vdc
Continuous:
Transient (100ms)
ASAxxxx36-L
ASAxxxx36-L
VI
VI, trans
0
0
-
-
75
100
Vdc
Vdc
b) Operating Temperature
Ambient
Case Surface
All Ta
Tc
-40
-40
-
-
71
90
ºC
ºC
c) Storage Temperature All TSTG -55 - 105 ºC
d) Operating Humidity All - - - 95 %
e) I/O Isolation
(Conditions : 0.5mA for 60 sec)
Input-Output All - - - 1500 Vdc
f) Output Power 3.3V
5V / ±5V
12V / ±12V
15V / ±15V
Po,max
Po,max
Po,max
Po,max
-
-
-
-
-
-
-
-
4
5
6
6
W
W
W
W
DATE : April 2008 MODEL : ASA Series SHEET 4 / 19
Technical Reference Note
ASA
(
6W
)
Famil
y
INPUT SPECIFICATIONS
Parameter Device Symbol Min Typ Max Unit
a) Operating Input Voltage ASAxxxx18-L
ASAxxxx36-L
VI
VI
9
18
24
48
36
75
VDC
VDC
b) Maximum Input Current
ASAxxxx18-L
(VI = 0 to VI ,max : Io = Io,max)
3.3V
5V / ±5V
12V / ±12V
15V / ±15V
II,max
II,max
II,max
II,max
-
-
-
-
-
-
-
-
700
800
950
950
mA
mA
mA
mA
ASAxxxx36-L
(VI = 0 to VI ,max : Io = Io,max)
3.3V
5V / ±5V
12V / ±12V
15V / ±15V
II,max
II,max
II,max
II,max
-
-
-
-
-
-
-
-
350
400
500
500
mA
mA
mA
mA
c) No Load Input Power
(VI = VI,nom )
All - - - 0.4 W
CAUTION: This power module is not internally fused. An input fuse must always be used.
DATE : April 2008 MODEL : ASA Series SHEET 5 / 19
Technical Reference Note
ASA
(
6W
)
Famil
y
OUTPUT SPECIFICATIONS
Parameter Device Symbol Min Typ Max Unit
a) Output Voltage Setpoint
(VI = VI,min to VI,max: Io = Io,,max ;
TA = 25 ºC)
3.3V
5V
12V
15V
±5V
±12V
±15V
Vo,set
Vo,set
Vo,set
Vo,set
Vo,set
Vo,set
Vo,set
3.23
4.90
11.76
14.70
±4.90
±11.76
±14.70
3.30
5.00
12.00
15.00
±5.00
±12.00
±15.00
3.37
5.10
12.24
15.30
±5.10
±12.24
±15.30
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
b) Output Regulation:
Line (VI = VI,max toVI,min; Io = Io,,max)
Load (VI = VI,,nom; Io = Io,min to Io,max)
Cross (VI = VI,,nom; Io = +Io,max, -Io,min
or +Io,min, -Io,max to +Io,max, -Io,max )
Temperature
(Tc = -40 ºC to +90ºC)
All
3.3V
Others
±5V/±12V/
±15V
All
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0.5
1
0.5
3
1.0
%
%
%
%
%Vo
c) Output Ripple and Noise
(Across 1µF @50V, X7R ceramic capacitor
& 10µF @25V tantalum capacitor)
See Figure 1.
Peak-to-Peak (5 Hz to 20 MHz)
3.3V
5V
12V
15V
-
-
-
-
-
-
-
-
-
-
-
-
100
100
120
150
mVp-p
mVp-p
mVp-p
mVp-p
d) Rated Output Current
Single Output
3.3V
5V
12V
15V
Io
Io
Io
Io
120
100
50
40
-
-
-
-
1200
1000
500
400
mA
mA
mA
mA
Dual Output ±5V
±12V
±15V
Io
Io
Io
±50
±25
±20
-
-
-
±500
±250
±200
mA
mA
mA
e) Efficiency
(VI = VI,nom ; Io,max ; TA = 25°C) 3.3V
5V
12V
15V
-
-
-
-
-
-
-
-
78
81
82
83
-
-
-
-
%
%
%
%
±5V
±12V
±15V
-
-
-
-
-
-
81
82
83
-
-
-
%
%
%
f) Switching Frequency All - 180 200 220 KHz
DATE : April 2008 MODEL : ASA Series SHEET 6 / 19
Technical Reference Note
ASA
(
6W
)
Famil
y
OUTPUT SPECIFICATIONS (Cont.)
Parameter Device
(Series) Symbol Min Typ Max Unit
g) Dynamic Response :
(∆Io/∆t = 0.08A/µs ;
VI = VI,,nom; TA = 25°C)
Load Change from Io = 50% to
100% of Io,max :
Peak Deviation Settling Time
(to Vo,nom)
3.3V/5V/
±5V
12V/±12V/
15V/±15V
All
-
-
-
-
-
-
-
-
-
6
2
250
%Vo
%Vo
µsec
i) Output Voltage Overshoot
(Io = Io,max ; TA = 25°C)
All - - 0 4 %Vo
FEATURE SPECIFICATIONS
Parameter Device
(Series) Symbol Min Typ Max Unit
Undervoltage Lockout
Turn-on Point
(Io = Io,max)
Turn-off Point
(Io = Io,max)
ASAxxxx18-L
ASAxxxx36-L
ASAxxxx18-L
ASAxxxx36-L
-
-
-
-
-
-
-
-
8.4
9.4
5
8
8.9
16
V
V
V
V
Isolation Capacitance All - - 1000 - PF
Isolation Resistance All - 10 - - MΩ
Calculated MTBF
(Io = Io,max ; TA = 25°C)
All - 1M - - Hours
Weight All - - - 20 g
DATE : April 2008 MODEL : ASA Series SHEET 7 / 19
Technical Reference Note
ASA
(
6W
)
Famil
y
MAXIMUM CAPACITIVE LOAD
Maximum Capacitive Load @ Full Load
Astec Model
Number Vin = Low Line Vin = Nominal Line Full Load
ASA01F18 200uF 320uF 1.2A
ASA01F36 590uF 540uF 1.2A
ASA01A18 200uF 310uF 1A
ASA01A36 300uF 320uF 1A
ASA00B18 200uF 240uF 0.5A
ASA00B36 110uF 120uF 0.5A
ASA00C18 80uF 120uF 0.4A
ASA00C36 75uF 75uF 0.4A
ASA00AA18 ±200uF ±300uF ±0.5A
ASA00AA36 ±400uF ±440uF ±0.5A
ASA00BB18 ±80uF ±120uF ±0.25A
ASA00BB36 ±50uF ±70uF ±0.25A
ASA00CC18 ±50uF ±45uF ±0.2
ASA00CC36 ±80uF ±90uF ±0.2
DATE : April 2008 MODEL : ASA Series SHEET 8 / 19
Technical Reference Note
ASA
(
6W
)
Famil
y
Basic Operation and Features
The ASA converters were designed specifically to address applications where high power density is required.
These modules provide 1500V isolation and operate from the input ranges of 9V-36V and 18V-75V with standard features
such as short circuit protection.
Output Current Protection
To provide protection in a short circuit condition, the converter is equipped with current limiting circuitry and can endure the
fault condition for an unlimited duration. At the point of current-limit inception, the converter goes into “Hiccup Mode”,
causing the output current to be limited both in peak and duration. The converter operates normally once the output current is
brought back into its specified range.
DATE : April 2008 MODEL : ASA Series SHEET 9 / 19
Technical Reference Note
ASA
(
6W
)
Famil
y
TEST SETUP
Note: Use a 0.1µF @50V X7R ceramic capacitor and a 10µF @ 25V tantalum capacitor. Scope measurement should be made
using a BNC socket. Position the load between 51 mm and 76 mm (2 in. and 3 in.) from module.
Figure 1 : Peak-to-Peak Output Noise Measurement Test Setup.
Vo(+
Vo(-
0.1 uF 10 uF LOAD
RESISTIVE
SCOPE
COPPER STRIP
DATE : April 2008 MODEL : ASA Series SHEET 10 / 19
Technical Reference Note
ASA
(
6W
)
Famil
y
Performance Curves – Efficiency Curve
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
120.0
240.0
360.0
480.0
600.0
720.0
840.0
960.0
1080.0
1200.0
Output Load (mA)
Efficiency %
9Vin
24Vin
36Vin
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
100.0
300.0
500.0
700.0
900.0
Output Load (mA)
Efficiency %
9Vin
24Vin
36Vin
Efficiency vs. Load @ +25° Ambient, ASA01F18-L Efficiency vs. Load @ +25° Ambient, ASA01A18-L
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
50.0
100.0
150.0
200.0
250.0
300.0
350.0
400.0
450.0
500.0
Output Load (mA)
Efficiency %
9Vin
24Vin
36Vin
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
40.0
80.0
120.0
160.0
200.0
240.0
280.0
320.0
360.0
400.0
Output Load (mA)
Efficiency %
9Vin
24Vin
36Vin
Efficiency vs. Load @ +25° Ambient, ASA00B18-L Efficiency vs. Load @ +25° Ambient, ASA00C18-L
DATE : April 2008 MODEL : ASA Series SHEET 11 / 19
Technical Reference Note
ASA
(
6W
)
Famil
y
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
120.0
240.0
360.0
480.0
600.0
720.0
840.0
960.0
1080.0
1200.0
Output Load (mA)
Efficiency %
18Vin
48Vin
75Vin
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
100.0
200.0
300.0
400.0
500.0
600.0
700.0
800.0
900.0
1000.0
Output Load (mA)
Efficiency %
18Vin
48Vin
75Vin
Efficiency vs. Load @ +25° Ambient, ASA01F36-L Efficiency vs. Load @ +25° Ambient, ASA01A36-L
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
50.0
100.0
150.0
200.0
250.0
300.0
350.0
400.0
450.0
500.0
Output Load (mA)
Efficiency %
18Vin
48Vin
75Vin
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
40.0
80.0
120.0
160.0
200.0
240.0
280.0
320.0
360.0
400.0
Output Load (mA)
Efficiency %
18Vin
48Vin
75Vin
Efficiency vs. Load @ +25° Ambient, ASA00B36-L Efficiency vs. Load @ +25° Ambient, ASA00C36-L
DATE : April 2008 MODEL : ASA Series SHEET 12 / 19
Technical Reference Note
ASA
(
6W
)
Famil
y
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
50.0
100.0
150.0
200.0
250.0
300.0
350.0
400.0
450.0
500.0
Output Load (mA)
Efficiency %
9Vin
24Vin
36Vin
45
50
55
60
65
70
75
80
85
90
95
100
25.0
50.0
75.0
100.0
125.0
150.0
175.0
200.0
225.0
250.0
Output Load (mA)
Efficiency %
9vin
24vin
36vin
Efficiency vs. Load @ +25° Ambient, ASA00AA18-L Efficiency vs. Load @ +25° Ambient, ASA00BB18-L
45
50
55
60
65
70
75
80
85
90
95
100
20.0
40.0
60.0
80.0
100.0
120.0
140.0
160.0
180.0
200.0
Output Load (mA)
Efficiency %
9Vin
24Vin
36Vin
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
50.0
100.0
150.0
200.0
250.0
300.0
350.0
400.0
450.0
500.0
Output Load (mA)
Efficiency %
18Vin
48Vin
75Vin
Efficiency vs. Load @ +25° Ambient, ASA00CC18-L Efficiency vs. Load @ +25° Ambient, ASA00AA36-L
DATE : April 2008 MODEL : ASA Series SHEET 13 / 19
Technical Reference Note
ASA
(
6W
)
Famil
y
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
25.0
50.0
75.0
100.0
125.0
150.0
175.0
200.0
225.0
250.0
Output Load (mA)
Efficiency %
18Vin
48Vin
75Vin
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
20.0
40.0
60.0
80.0
100.0
120.0
140.0
160.0
180.0
200.0
Output Load (mA)
Efficiency %
18Vin
48Vin
75Vin
Efficiency vs. Load @ +25° Ambient, ASA00BB36-L Efficiency vs. Load @ +25° Ambient, ASA00CC36-L
DATE : April 2008 MODEL : ASA Series SHEET 14 / 19
Technical Reference Note
ASA
(
6W
)
Famil
y
Performance Curves
Transient Response – 50% to 100% load (ASA01A36-L) Start-Up Time (ASA01A36-L)
0
10
20
30
40
50
60
70
80
90
100
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
100
110
Case Surface Temperature ( ℃ )
Output Power ( % )
Ripple & Noise (ASA01A36-L) Power Derating
DATE : April 2008 MODEL : ASA Series SHEET 15 / 19
Technical Reference Note
ASA
(
6W
)
Famil
y
Conducted EMI Performance
DATE : April 2008 MODEL : ASA Series SHEET 16 / 19
Technical Reference Note
ASA
(
6W
)
Famil
y
DATE : April 2008 MODEL : ASA Series SHEET 17 / 19
Technical Reference Note
ASA
(
6W
)
Famil
y
Mechanical Dimensions and Module Pin Assignment
Pb
2.54
(0.10)
20.32
(0.80)
3.05
(0.12)
Label
10.16
(0.40)
31.75
(1.25)
22.86
(0.90)
φ0.50
(0.02)
15.24
(0.60)
IN=48Vdc Nom. OUT=5Vdc
RoHS Date Code
Dot
Dot
Top View
-Vin NC NC
+Vin -Vout +Vout+Vin
-Vin
Outline Drawing for ASA Single Series
31.75
(1.25)
20.32
(0.80)
Date Code
OUT=
5Vdc
RoHS
IN=9~36Vdc
Pb
3.05
(0.12)
Label
10.16
(0.40)
2.54
(0.10)
22.86
(0.90)
φ0.50
(0.02)
15.24
(0.60)
+Vin
-Vin
+Vin
-Vin
Dot
+Vout
COM
COM -Vout
Top View
Dot
Outline Drawing for ASA Dual Series
DATE : April 2008 MODEL : ASA Series SHEET 18 / 19
Technical Reference Note
ASA
(
6W
)
Famil
y
Package Information
DATE : April 2008 MODEL : ASA Series SHEET 19 / 19
Technical Reference Note
ASA
(
6W
)
Famil
y
Recommended Lead-Free Wave Soldering Temperature Profile
20
0
30
60
90
120
150
180
210
240
270
°C
300
5°CMAX
40 60 80 100 140120 160 180
30-50sec
200 sec
90°C
100-110°C
255°C-265°C
3.0~5.0sec
60-90sec preheat area
