148 USA: 1-888-41-ASTEC Europe (UK): 01384-842211 Asia (HK): 852-2437-9662
SPECIAL FEATURES
• High Efficiency - up to 86%
• 500 KHz fixed frequency
•85°C baseplate operating
temperature (with no derating)
• Low output ripple and noise
• Excellent transient response
• Safety isolated low voltage control and
monitoring
• High Reliability
• Wide input voltage range
• Parallelable with accurate current
sharing
• Adjustable output voltage and current
limit
• Current and temperature monitoring
outputs
• Regulation to zero load
ENVIRONMENTAL
Operating Temperature (baseplate):
-20°C to +85°C
Storage Temperature: -40°C to +105°C
Overtemperature Protection: 90°C typical
MTBF: > 1 million hours (50°C baseplate)
SAFETY
ULUL 1950E132002
CSACSA22.2-234LR53982C
CSA22.2-950
VDEIEC95020396-3336-1004 & 1010
EN 60950
CE CEMark (LVD)
ELECTRICAL SPECIFICATIONS
Input
Input Range ..........................180 to 400 VDC
or
36 to 72 VDC
Efficiency...............................82% typical (5V @ 40A);
86% typical (12V @ 18A)
Control
Voltage Adjust .......................90 to 110% Vo
Enable ................................... TTL compatible (low to enable)
Current Limit Adjust............... 20% to 100% Io
Clock Input (external sync) ...3.3 to 5.5Vp-p @ 1MHz ± 10%
Clock Output (internal clock) . 4.5Vp-p typical @ 1MHz ± 0.5%
Power Good/Identification ..... High (Vo) = power good
Temperature Monitor Output .10 mV/°K (2.73V = 0°C)
Current Monitor Output .........0 to 1mA (1 mA = 100% Io rated)
Output
Load Regulation .................... 0.2% typical down to no load
Line Regulation .....................0.1% typical
Noise/Ripple..........................100 mV typical (output below 5V)
2% typical (output 5V and over)
Remote Sense ......................Up to 0.5V
Output Voltage
Adjust Range ........................±10% of nominal output
Transient Response ..............3% typical deviation with 200µs recovery
(25-75% full load)
Current Share Accuracy ........3% typical
Overvoltage Protection .........125% nominal Vo
Current Limit..........................110% Io typical max
NOTES
Nominal values apply with sense pins connected and other control pins
unconnected.
Specifications subject to change without notice.
AL80A
240 Watts
AL80A Enhanced Series
Input Voltages
48V or 300V
# of Outputs
Single
Total Power
240 Watts
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View AL80A Technical Manual
Power Fax 760-930-0881 149
DC/DC
CONVERTERS
ASTEC AMERICA
5810 Van Allen Way
Carlsbad, CA 92008
Telephone: 760-930-4600
Facsimile: 760-930-0698
ASTEC EUROPE
Astec House, Waterfront Business Park
Merry Hill, Dudley
West Midlands, DY5 1LX, UK
Telephone: 01384-842211
Facsimile: 01384-843355
ASTEC ASIA
6F., China Dyeing Works Building
382-392 Castle Peak Road
Tsuen Wan, N.T., Hong Kong
Telephone: 852-2437-9662
Facsimile: 852-2402-4426
12.7
(0.50)
Thermal Base Plate*
2 Input Pins 12 Control Pins
8 Output Pins
61.0 (2.40)
116.8 (4.60)
Load
+ SENSE
– SENSE
+ O/P
– O/P
36 to 72V
or
180 to 400V
+ I/P
– I/P
7
61
12
Current limit adjust
Output voltage adjust
Enable (close to enable)
Temperature monitor output
Current monitor output
(e.g. to fan control circuit)
(e.g. to load indicator)
PG/ID goes high (to Vo) to indicate power good.
Resistance between PG/ID and +O/P
with no power applied indicates nominal
O/P voltage, where 1K Ohm = 1 volt 
(eg 3K3 = 3.3 V).
Load
+ SENSE
– SENSE
C SHARE
1
12
+ SENSE
– SENSE
C SHARE
1
8
CLK OUT
CLK IN
+ O/P
– O/P
5
4
7
6
+ O/P
– O/P
AL80A
AL60A
ORDERING INFORMATION
Input Output Output Model Number Input Output Output Model Number
Voltage Voltage Current Voltage Voltage Current
300V 2.0V 60A AL80A-300L-020F60 300V 12V 18A AL80A-300L-120F18
300V 3.3V 50A AL80A-300L-033F50 300V 15V 16A AL80A-300L-150F16
300V 5V 40A AL80A-300L-050F40 48V 5V 40A AL80A-048L-050F40
300V 6.3V 34A AL80A-300L-063F34
Please contact Astec for information on other output voltages, power ranges and configurations.
Input Output Control Pins
31. +ve 21. 1. +SENSE
32. –ve 22. 2. TEMP MON
23. 3. C MON
24. 4. C SHARE
26. 5. CLK OUT
27. 6. CLK IN
28. 7. PG/ID
29. 8. C LIM ADJ
9. RSV (Reserved)
10. V ADJ
11. ENABLE
12. –SENSE
DIMENSIONS
–ve
+ve
Secondary
side
controls
Doc No: 1201 • Rev 12.22.98
CONNECTIONS
Connection example
*Must be connected to protective earth
Parallel connections Viewed from pins side. Dimensions in mm (inches)
AL80A
PIN ASSIGNMENT
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