参数资料
型号: AS2320-7PB1
厂商: POWER-ONE INC
元件分类: 电源模块
英文描述: 2-OUTPUT DC-DC REG PWR SUPPLY MODULE
封装: METAL, CASE S02, MODULE
文件页数: 2/33页
文件大小: 438K
代理商: AS2320-7PB1
S Series Data Sheet
100 Watt AC-DC and DC-DC Converters
APR 26, 2006 revised to SEP 25, 2006
Page 10 of 33
www.power-one.com
Thermal Considerations
If a converter is located in free, quasi-stationary air (convection
cooling) at the indicated maximum ambient temperature TA max
(see table: Temperature specifications) 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 depends heavily on the conditions of operation and
integration 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 operating
conditions TC remains within the limits stated in the table
Temperature specifications.
Notes: Sufficient forced cooling or an additional heat sink allows TA
to be higher than 71
°C (e.g., 85 °C) if TC max is not exceeded.
For -7 or -9 models at ambient temperature TA = 85 °C with only
convection cooling, and the maximum permissible current for each
output is approx. 40% of its nominal value as per the figure below.
Output Protection
Each output is protected against overvoltages which could occur
due to a failure of the internal control circuit. Voltage suppressor
diodes (which under worst case condition may become a short
circuit) provide the required protection. The suppressor diodes are
not designed to withstand externally applied overvoltages.
Overload at any of the outputs will cause a shut-down of all
outputs. A red LED indicates the overload condition.
Parallel or Series Connection
Single or double-output models with equal nominal output voltage
can be connected in parallel without any precautions using
Option T (current sharing).
Single output models and/or main and second outputs of double-
output models can be connected in series with any other (similar)
output.
Notes:
– Parallel connection of double output models should include both,
main and second output to maintain good regulation of both
outputs.
– Not more than 5 models should be connected in parallel.
– Series connection of second outputs without involving their main
outputs should be avoided as regulation may be poor.
– Rated output voltages above 36 V need additional measures in
order to comply with the safety requirements for SELV (Safe Extra
Low Voltage)
– The maximum output current is limited by the output with the lowest
current limitation if several outputs are connected in series.
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
50
60
70
80
90
100
Io/Io nom
TA [C]
0.9
1.0
Forced cooling
05089_052305
TA min
TC max
Convection cooling
Fig. 7
Output current derating versus temperature for -7 and -9
models.
Thermal Protection
A temperature sensor generates an internal inhibit signal which
disables the outputs if the case temperature exceeds TC max.
The outputs are automatically re-enabled when the temperature
drops below this limit.
Continuous operation under simultaneous worst-case conditions
of the following three parameters should be avoided: minimum
input
voltage,
maximum
output
power,
and
maximum
temperature.
Output Voltage Regulation
Fig. 8
Output characteristic Vo1 vs. Io1 (typ.)
Vo
Vo nom
0.98
0.5
0
0.5
1.0
Io1
IoL
Io
Io nom
05098_050605
The following figures apply to single-output or double-output
models with parallel-connected outputs.
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