AK80A
240 Watts
AK80A Economy Series
Total Power
Input Voltages
# of Outputs
240 Watts
24V, 48V
Single
S P E C I A L F E AT U R E S
•
•
•
•
•
•
•
•
•
•
•
•
•
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
E L E C T R I C A L S P E C I F I C AT I O N S
Input
Input Range ........................... 36 to 72 VDC
or
18 to 36 VDC
Efficiency ............................... 83% typical (5V @ 40A);
87% typical (12V @ 18A);
87% typical (15V @ 16A)
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)
E N V I R O N M E N TA L
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)
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
SAFETY
UL
CSA
UL 1950
CSA22.2-234
CSA22.2-950
E132002
LR53982C
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
VDE
EN
CE
IEC950 20366-3336-1002 & 1008
60950
CEMark (LVD)
NOTES
Nominal values apply with sense pins connected and other control pins
unconnected.
Specifications subject to change without notice.
184
USA: 1-888-41-ASTEC
Europe (UK): +44(0)1384-842211
Asia (HK): 852-2437-9662
ASIA
6F., CDW Building
382-392 Castle Peak Road
Tsuen Wan, N.T., Hong Kong
Telephone: 852-2437-9662
Facsimile: 852-2402-4426
EUROPE
Astec House, Waterfront Business Park
Merry Hill, Dudley
West Midlands, DY5 1LX, UK
Telephone:+44(0)1384-842211
Facsimile:+44(0)1384-843355
AMERICAS
5810 Van Allen Way
Carlsbad, CA 92008
Telephone: 760-930-4600
Facsimile: 760-930-0698
O R D E R I N G I N F O R M AT I O N
Input
Voltage
48V
48V
48V
48V
48V
Output
Voltage
3.3V
5V
12V
15V
24V
Output
Current
50A
40A
18A
16A
10A
Model Number
AK80A-048L-033F50
AK80A-048L-050F40
AK80A-048L-120F18
AK80A-048L-150F16
AK80A-048L-240F10
Input
Voltage
24V
24V
24V
24V
24V
Output
Voltage
3.3V
5V
12V
15V
24V
Output
Current
40A
30A
14A
12A
8A
Model Number
D
C
D
C
P
AK80A-024L-033F40
AK80A-024L-050F30
AK80A-024L-120F14
AK80A-024L-150F12
AK80A-024L-240F08
O
W
E
R
Please contact Astec for information on other output voltages, power ranges and configurations.
CONNECTIONS
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).
+ O/P
PIN ASSIGNMENTS
Input
Output
21.
22. +ve
23.
24.
26.
27. –ve
28.
29.
Control Pins
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
+SENSE
Secondary
PG/ID
side
V ADJ
controls
-SENSE
S COM
C SHARE
CLK OUT
Primary
CLK IN
side
ENABLE
controls
C LIM ADJ
TEMP MON
PRI AUX
31. +ve
32. –ve
Temperature monitor output
(e.g. to fan control circuit)
18 to 36V
or
36 to 72V
+ I/P
8
9
– I/P
5
12
2
1
+ SENSE
Load
3 4
– SENSE
– O/P
AK80A
Enable
(close to enable)
Current limit adjust
Output voltage adjust
DIMENSIONS
THERMAL BASE PLATE
*
Connection example
+ O/P
12.7
(0.50)
C SHARE
CLK OUT
8
9
ENABLE
5
12
S COM
2 1
+ SENSE
Load
3 4
– SENSE
8 PRIMARY SIDE
CONTROL PINS
2 INPUT PINS
8 OUTPUT PINS
4 SECONDARY SIDE
CONTROL PINS
– O/P
*Must be connected to protective earth
C SHARE
CLK IN
8
9
ENABLE
5
S COM
AMPSS™ POWER MODULE
2 1
+ SENSE
3 4
– SENSE
32
9
12
5
3
2
4
1
12
8
31
24
23
22
21
Parallel connections
116.8 (4.60)
Rev 02.21.00
www.astec.com
61.0 (2.40)
29
28
27
26
185
Automotive Electronics
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