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  • 參數(shù)資料
    型號(hào): LK5660-7RD9
    廠商: POWER-ONE INC
    元件分類: 電源模塊
    英文描述: 2-OUTPUT 150 W AC-DC PWR FACTOR CORR MODULE
    封裝: HEAT SINK, METAL, CASE K02, MODULE
    文件頁(yè)數(shù): 2/28頁(yè)
    文件大?。?/td> 1215K
    代理商: LK5660-7RD9
    K Series
    AC-DC Converters >100 Watt
    Rugged Environment
    Edition 4/4.99
    10/28
    MELCHER
    The Power Partners.
    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 if the tem-
    perature drops below this limit.
    Output Protection
    Each output is protected against overvoltage which could
    occur due to a failure of the control circuit by means of a
    voltage suppressor diode which, under worst case condi-
    tions, may become a short circuit. The suppressor diodes
    are not designed to withstand externally applied over-
    voltages. Overload at any of the two outputs will cause a
    shut-down of both outputs. A red LED indicates the over-
    load condition.
    Thermal Considerations
    If a converter is located in free, quasi-stationary air (con-
    vection cooling) at the indicated maximum ambient tem-
    perature
    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 compo-
    nents 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
    allows
    TA to be higher than 71
    °C (e.g. 85°C) if T
    C max is not
    exceeded.
    For -7 or -9 units at an ambient temperature
    TA of 85
    °C with
    only convection cooling, the maximum permissible current
    for each output is approx. 40% of its nominal value as per
    figure.
    It is recommended that continuous operation under simulta-
    neous extreme worst case conditions of the following three
    parameters be avoided: Minimum input voltage, maximum
    output power and maximum temperature.
    -6 versions have reduced
    TA and TC
    0
    0.1
    0.2
    0.3
    0.4
    0.5
    0.6
    0.7
    0.8
    TA min 50
    60
    70
    80
    90
    100
    Io/Io nom
    TA [°C]
    0.9
    1.00
    forced cooling
    convection cooling
    TC max
    -6 -7
    -6
    -7
    05139
    Fig. 8
    Output current derating versus temperature for –7 and –9
    units.
    Efciency versus Load
    0.2
    0.4
    0.6
    0.8
    1
    0
    0.90
    0.30
    0.40
    0.50
    0.60
    0.70
    0.80
    Efficiency
    Io/Io nom
    Ui = 230 V AC
    Ui = 85 V AC
    05007
    Fig. 9
    Efciency versus load at Ui; 230 V AC and 88 V AC
    Switching Frequency versus Load
    0.2
    0.4
    0.6
    0.8
    1
    0
    60
    0
    10
    20
    30
    40
    50
    Frequency [kHz]
    load [Io/Io nom]
    70
    80
    1.2
    05008
    Fig. 10
    Switching frequency versus load. (The boost converter at
    the input stage has a xed frequency of 100 kHz)
    Parallel or Series Connection of Units
    Single or double output units with equal nominal output volt-
    age can be connected in parallel without any precautions
    using option T.
    With option T (current sharing), all units share the current
    approximately equally.
    Single output units and/or main and second outputs of dou-
    ble output units can be connected in series with any other
    (similar) output.
    Note:
    – Parallel connection of double output units should always
    include both, main and second output to maintain good
    regulation of both outputs.
    – Not more than 5 units should be connected in parallel.
    – Series connection of second outputs without involving
    their main outputs should be avoided as regulation may
    be poor.
    – The maximum output current is limited by the output with
    the lowest current limitation if several outputs are con-
    nected in series.
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