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參數(shù)資料
| 型號(hào)： | CPD200-4530G |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 200 ? 250 Watt CompactPCI?DC-DC Converters |
| 中文描述： | 200？ 250瓦的CompactPCI？的DC - DC轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 6/13頁(yè) |
| 文件大?。?/td> | 259K |
| 代理商： | CPD200-4530G |
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NOV 28, 2006 revised to JAN 29, 2007
Page 6 of 13
www.power-one.com
CPD Series Data Sheet
200 – 250 Watt CompactPCI
DC-DC Converters
Thermal Considerations
If a converter CPD is mounted in an upright position with air
flow of 250 LFM (CPD200) or 400 LFM (CPD250) allowing
unrestricted forced air cooling, and is operated at its
nominal input voltage and power at maximum ambient
temperature
T
A max
(see:
Temperatures
), the temperature
measured at the measurement point of the case
temperature
T
C
(see:
Mechanical Data
) will approach the
indicated maximum value
T
C max
(105 °C) after an initial
warm-up phase. However, the relationship between
T
A
and
T
C
depends heavily on the operating conditions and
system integration. The thermal conditions are influenced
significantly by the input voltage, the output current, the
airflow, and the temperature of the adjacent elements and
surfaces.
T
A max
is therefore contrary to
T
C max
only an
indicative value.
Fig. 3b
Output power versus temperature T
A
(CPD250)
Caution
: The installer must ensure that under all
operating conditions
T
remains within the limits shown in
the diagrams fig. 3 valid for a converter mounted in free
and quasi-stationary air, allowing unrestricted convection
cooling.
Note
: Forced-air cooling or an additional heat sink can
improve the reliability or allow
T
to be increased above
T
A max
provided that
T
C max
is not exceeded.
Thermal Protection
A temperature sensor fitted on the main PCB provides an
over temperature warning (degrade) signal 15 °C before
the temperature
T
c max
at which the thermal derating
begins to reduce the output power. The output power
returns to the nominal value, if the temperature drops
back below this limit. See
Temperature Warning and
Shut-Down.
Auxiliary Functions
Inhibit
The inhibit input enables (logic high, pull up) or disables
(logic low, pull down) all outputs, if a logic signal (TTL,
CMOS) is applied. In systems consisting of several
converters this feature may be used to control the
activation sequence of the converters by means of logic
signals, or to enable the source to start up, before full load
is applied.
Note:
If this function is not used, the inhibit pin 39 can be left
open (not connected). If pin 39 is connected to a return (e.g.
Fig. 4
Definition of V
inh
.
pin 24), the internal logic will disable all outputs. The inhibit
input is protected by a decoupling diode.
Table 5: Inhibit data
Fig. 5
Typical output response as a function of inhibit voltage.
0
t
t
0
Inhibit
1
0.1
1
V
o
/
V
o nom
t
r
t
f
06155a
0
0.5
30
40
50
70
P
o
/
P
o nom
1.0
200 LFM = 1 m/s
05190a
T
A min
Convection cooling
in upright position
90 °C
400 LFM
= 2 m/s
0.6
0
0.5
30
40
50
70
P
o
/
P
o nom
1.0
250 LFM = 1.25 m/s
05190-CPA200
T
A min
90 °C
0.6
Convection cooling
in upright position
Fig. 3a
Output power versus temperature T
A
(CPD200)
Characteristics
Conditions min
typ max Unit
V
inh
Inhibit
voltage
V
o
= on
V
o
= off
V
i min
–
V
i max
–
2
I
o
=
0
–
I
o max
2.4
0.8
V
50
t
r
Rise time
120
ms
t
f
Fall time
depending on
I
o
46
47
RTN
V
inh
06153b
INH#
39
(24)
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