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參數資料
| 型號： | EQ2660-7P |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 2-OUTPUT 106 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | METAL, CASE Q01, MODULE |
| 文件頁數： | 5/25頁 |
| 文件大?。?/td> | 747K |
| 代理商： | EQ2660-7P |
Cassette Style
DC-DC Converters
Q Series
Edition 5/5.2000
13/25
Thermal Considerations
If a converter is located upright in free flowing, quasi-sta-
tionary air (convection cooling) at the indicated maximum
ambient temperature
TA max (see table: Temperature specifi-
cations) and is operated at its nominal input voltage and
output power, the temperature measured at the
Measuring
point of case temperature TC (see: Mechanical Data) will
approach the indicated value
TC max after the warm-up
phase. However, the relationship between
TA and TC de-
pends heavily on the conditions of operation and integra-
tion into a system. The thermal conditions are influenced by
input voltage, output current, airflow and temperature of
surrounding components and surfaces.
TA max is therefore,
contrary to
TC max, an indicative value only.
Caution: The installer must ensure that under all operat-
ing conditions
TC remains within the limits stated in the
table:
Temperature specifications.
Notes: Sufficient forced cooling or an additional heat sink
improves the reliability or allows
TA to be higher than TA max
(e.g. 85
°C) as long as T
C max is not exceeded. In rack sys-
tems without proper thermal management, the modules
must not be packed too densely! In such cases the use of a
5 or 6TE front panel is recommended.
TA min 50
60
70
80
90
100
Po
TA [C]
forced
cooling
convection
cooling
TC max
05116
Po max
Po nom
0.45
Po nom
Fig. 16
Output current derating versus TA.
12
3
4
5
90
h [%]
Io [A]
Ui max
Ui nom
Ui min
05115
85
80
75
Fig. 15
Efficiency versus input voltage and output current (per
output). Typical values of EQ 2320 at Uo nom.
Typical Efficiency
Thermal Protection
A temperature sensor generates an internal inhibit signal
which disables the outputs if the case temperature ex-
ceeds
TC max. The outputs are automatically re-enabled if
the temperature drops below this limit.
Output Power at Reduced Temperature
Operating the units with output current from
Io nom...Io max
requires a reduction of ambient temperature to
TA max =
50
°C or forced cooling in order to keep T
C below 85
°C. If
TC max is exceeded, the unit runs into its thermal protection
and switches off (e.g.
TA
> 50°C and P
o
> P
o nom).
Important: Short-term operation within the shaded area
(e.g. start-up current, peak current) is possible without
additional measures, provided the case temperature re-
mains below
TC max.
Fig. 17
Output current versus ambient temperature
0
TA [°C]
Io
Io nom
71
50
Io max
Forced cooling
Convection cooling
05117
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