Special Features
Electrical Specs
240 Watts
AK80A
• High efficiency - up to 87%
• 500 KHz fixed frequency
• 85°C baseplate operating
temperature (with no derating)
• Low output ripple and noise
• Excellent transient response
• High reliability - over 1 million hours MTBF
• Wide input voltage range
• TTL compatible enable control
• Parallelable
• Adjustable output voltage and current limit
• Temperature monitor output
• Overtemperature and short circuit
protection
• Regulation to zero load
Operating temperature (baseplate):
0°C to +85°C
Storage temperature: -40°C to +105°C
Overtemperature protection: 90°C typical
MTBF: > 1 million hours (50°C baseplate)
UL UL 1950 E132002
CSA CSA22.2-234 LR53982C
CSA22.2-950
VDE IEC950 20366-3336-1002 & 1008
EN 60950
CE CEMark (LVD)
Input
Input Range 18 to 36 VDC
Efficiency83% typical @ 5V;
87% typical @ 12V;
87% typical @ 15V
Output
Load Regulation 0.3% 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 10% typical deviation with 300µs
recovery (25-75% full load)
Current Share Accuracy 5% typical
Overvoltage Protection 130% nominal Vo
Current Limit 115% Io max
Control
Voltage Adjust 90 to 110% Vo
Enable TTL compatible (low to enable)
Current Limit Adjust 20 to 100% Io rated
Clock Input
(external sync) 3.5 to 5Vp-p @ 1MHz ± 10%
Clock Output
(internal clock) 4.4 to 5.5Vp-p @ 1MHz ± 0.5%
Power
Good/Identification High (Vo) = power good
Temperature
Monitor Output 10 mV/°K (2.73V = 0°C)
Notes
Nominal values apply with sense pins connected and other control
pins unconnected.
Specifications subject to change without notice.
Environmental
Total Power: 240 Watts
Input Voltages: 24V
No. of Outputs: Single
Safety
Astec Integrated Power
America’s (USA): 1-888-41-ASTEC Europe (UK): 44 (1384) 842-211 Asia (HK): 852-2437-9662
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EUROPE
Astec House, Waterfront Business Park
Merry Hill, Dudley
West Midlands, DY5 1LX, UK
Telephone: 44 (1384) 842-211
Facsimile: 44 (1384) 843-355
AMERICAS
5810 Van Allen Way
Carlsbad, CA 92008
Telephone: 760-930-4600
Facsimile: 760-930-0698
Ordering Information
ASIA
Units 2111-2116, Level 21
Tower1, Metroplaza
223, Hing Fong Road
Fwai Fong, New Territories
Hong Kong
Telephone: 852-2437-9662
Facsimile: 852-2402-4426
Input Output Output Model Number
Voltage Voltage Current
24V 3.3V 40A AK80A-024L-033F40
24V 5V 30A AK80A-024L-050F30
24V 12V 14A AK80A-024L-120F14
24V 15V 12A AK80A-024L-150F12
24V 24V 8A AK80A-024L-240F08
Please contact Astec for information on other output voltages, power ranges and configurations.
Input Output Control Pins
31. +ve 21. +ve 1. +SENSE
32. –ve 22. +ve 2. PG/ID
23. +ve 3. V ADJ
24. +ve 4. -SENSE
26. -ve 5. S COM
27. -ve 6. C SHARE
28. -ve 7. CLK OUT
29. -ve 8. CLK IN
9. ENABLE
10. C LIM ADJ
11. TEMP MON
12. PRI AUX
Pin Assignments
Secondary
side
controls
Primary
side
controls
AK80A Astec Integrated Power
THERMAL BASE PLATE*
2 INPUT PINS 4 SECONDARY SIDE
CONTROL PINS
8 OUTPUT PINS
116.8 (4.60)
61.0 (2.40)
29
21
28
27
26
24
23
22
21
58
32
31
AMPSS™ POWER MODULE
12.7
(0.50)
34
129
8 PRIMARY SIDE
CONTROL PINS
Load
+ SENSE
– SENSE
C SHARE
1
4
+ SENSE
– SENSE
C SHARE
CLK OUT
5
CLK IN
+ O/P
– O/P
3
2
12
81
4
5
3
2
912
8
9
ENABLE
ENABLE
S COM
S COM
Load
+ SENSE
– SENSE
+ O/P
– O/P
18 to 36V
or
36 to 72V
+ I/P
– I/P
9
81
4
Current limit adjust
Output voltage adjust
Enable
(close to enable)
Temperature monitor output
(e.g. to fan control circuit)
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).
3
2
12
5
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