參數(shù)資料
型號： AM80A-048L-050P25
元件分類： 電源模塊
英文描述： 1-OUTPUT 125 W DC-DC REG PWR SUPPLY MODULE
文件頁數(shù)： 15/32頁
文件大?。?/td> 372K
代理商： AM80A-048L-050P25
AM80A
P
er
formance
S
er
ies
Rev. 05 Mar 99
AMPSS Reference Manual
22
Design Considerations
Input Bulk Capacitors
Electrolytic bulk reservoir capacitors placed close to
the module input pins are recommended to ensure
the module is fed with a low source impedance. For
the AM80A Performance Series module typical
values are 220F/100V for 48V modules and 220F/
450V for 300/320V modules.
Input Fusing
AMPSS modules do not have an in-line fuse fitted
internally. In order to comply with CSA, VDE and UL
safety regulations it is recommended that a fuse of
the following rating be fitted at the module's input.
Remote Loads
If the sensed load is some distance from the module,
the module's output voltage may rise sufficiently to
trigger the OVP protection circuit during a step load
change due to bus inductance. For this reason the
OVP margin should be increased in extreme cases.
Fitting a decoupling capacitor at the load can reduce
this effect.
It should be noted that a distributed power solution,
using AMPSSTM modules placed close to their loads,
will optimize transient response.
Thermal Data
Natural convection thermal impedance of the AM80A
package without a heatsink is approximately 4°C/W.
The below characteristic is for a standard horizontal
fin heatsink available from Astec (part number
APA501-80-002) with 11mm fins and 8mm pitch. The
heatsink will reduce module thermal impedance to
1°C /W with a forced air flow of 250 LFM when
mounted with a thermal pad (ASTEC P/N APA502-
80-001) between heatsink and module.
Overtemperature Protection
If the module's baseplate temperature exceeds
110°C, the module will latch OFF. To reset the
module the input supply or the enable pin of the
module must be cycled off and then on again, allow-
ing a period of time for the module to cool down.
Overtemperature shutdown can also be programmed
to occur at lower temperatures by using the TEMP
MON output to control the ENABLE pin.
0
0.2
0.4
0.6
0.8
1
1.2
0
200
40 0
600
80 0
1000
Vai r (L F M )
Thermal
Resistance
Baseplate
to
Ambient
(°C/W)
F or ced Con vecti on f o r AP A501-80-002
at 200W Ou tpu t
Input
Fuse Rating
300V/320V
10A / 250V
150V
10A / 250V
48V
10A / 250V
+
+I/P
-I/P
220F
VI
+SENSE
-SENSE
+O/P
-O/P
Load
0.1F
7
6
1
12
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