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  • 參數(shù)資料
    型號: LS4301-7EPD1B1
    元件分類: 電源模塊
    英文描述: 1-OUTPUT 100 W AC-DC PWR FACTOR CORR MODULE
    封裝: METAL, CASE S02, MODULE
    文件頁數(shù): 21/27頁
    文件大?。?/td> 599K
    代理商: LS4301-7EPD1B1
    Cassette Style
    100 Watt AC-DC Converters
    S Series PFC
    Edition 01/01.2001
    3/27
    Functional Description
    The input voltage is fed via an input fuse, an input lter, a
    rectier and an inrush current limiter to a single transistor
    boost converter. This converter provides a sinusoidal input
    current (IEC/EN 61000-3-2, class D equipment) and sour-
    ces a capacitor with a voltage of 360-370 V DC. This ca-
    pacitor sources a single transistor forward converter.
    Each output is powered by a separate secondary winding
    of the main transformer. The resultant voltages are rectied
    and their ripples smoothed by a power choke and an output
    lter. The control logic senses the main output voltage
    Uo1
    and generates, with respect to the maximum admissible
    output currents, the control signal for the primary switching
    transistor.
    The second output of double output units is controlled by
    the main output, but has independent current limiting. If the
    main output is driven into current limitation, the second out-
    put voltage will fall as well and vice versa.
    Input
    filter
    Control
    circuit
    P
    2
    Y
    16
    18
    20
    22
    12
    4
    6
    8
    10
    14
    Y
    Output
    filter
    1
    28
    30
    32
    24
    3
    +
    Y
    Forward
    converter
    (approx.
    80
    kHz)
    +
    Boost
    converter
    (PFC)
    360
    V
    DC
    Ci
    4
    03001
    R
    i
    D/V
    T
    S+
    Vo+
    Vo–
    S–
    26
    N
    P~
    Fig. 1
    Block diagram of single output converters LS 4000
    Input
    filter
    Control
    circuit
    1
    P
    2
    16
    18
    20
    22
    12
    14
    4
    6
    8
    10
    Output
    2
    filter
    Output
    1
    filter
    26
    28
    30
    32
    24
    3
    +
    Y
    Forward
    converter
    (approx.
    80
    kHz)
    Boost
    converter
    (PFC)
    +
    360
    V
    DC
    Ci
    4
    03002
    N~
    P~
    R
    i
    D
    T
    Vo1+
    Vo1–
    Vo2+
    Vo2–
    Fig. 2
    Block diagram of symmetrical double output converters LS 5000
    1 Transient suppressor (VDR)
    2 Inrush current limiter (NTC or Opt. E), -9 versions exclude the NTC
    3 Input fuse
    4 Hold-up capacitor
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