• 參數(shù)資料
    型號(hào)： LH1781-2RD5
    廠商： POWER-ONE INC
    元件分類： 電源模塊
    英文描述： 1-OUTPUT AC-DC REG PWR SUPPLY MODULE
    封裝： ROHS COMPLIANT PACKAGE-32/11
    文件頁數(shù)： 21/21頁
    文件大?。?/td> 984K
    代理商： LH1781-2RD5
    H Series Data Sheet
    70 Watt AC-DC Converters
    BCD20019 Rev AA
    Page 9 of 21
    www.power-one.com
    1.6
    0.8
    0
    –0.8
    –50
    V
    inh [V]
    I
    inh [mA]
    –30
    0
    –10
    10
    30
    50
    2.0
    1.2
    0.4
    –0.4
    V
    inh = 0.8 V
    V
    o = on
    V
    o = off
    V
    inh = 2.4 V
    06032a
    Vo–
    i
    Vo+
    I
    inh
    V
    inh
    06115a
    N
    L
    Table 5: Output response time tr and tf (see fig. 4). Values not applicable for models equipped with option E.
    Type of converter
    tr at Po = 0 and tf at Po = Po nom
    tr and tf at Po = 3/4 Po nom
    tr at Po = Po nom
    Unit
    typ
    max
    typ
    max
    typ
    max
    LH1001-2R
    3
    17
    3
    17
    5
    25
    ms
    LH1301-2R
    5
    25
    8
    30
    10
    40
    LH1501-2R
    3
    17
    5
    25
    15
    50
    LH1601-2R
    8
    30
    15
    45
    20
    70
    LH1901-2R
    35
    100
    50
    150
    85
    230
    LH2320-9
    10
    40
    15
    50
    25
    80
    LH2540-9
    8
    30
    20
    40
    20
    60
    LH3020-9
    30
    85
    45
    130
    75
    210
    LH3040-9
    20
    70
    30
    90
    50
    150
    Auxiliary Functions
    i Inhibit
    The outputs of the converters may be enabled or disabled by
    means of a logic signal (TTL, CMOS, etc.) applied between the
    inhibit input i and the negative pin of output 1 (Vo1–). In
    systems with several converters, this feature can be used, for
    example, to control the activation sequence of the converters.
    If the inhibit function is not required, connect the inhibit pin 2 to
    pin 23 to enable the outputs (active low logic, fail safe). The
    response times are specified in fig. 12.
    Fig. 11
    Definition of Vinh and Iinh.
    Fig. 10
    Typical inhibit current Iinh versus inhibit voltage Vinh
    Table 4: Inhibit data
    Characteristics
    Conditions
    min
    typ
    max
    Unit
    Vinh
    Inhibit input voltage to keep
    Vo = on
    Vi min – Vi max
    –50
    0.8
    V
    output voltage
    Vo = off
    TC min – TC max
    2.4
    50
    I inh
    Inhibit current
    Vinh = 0
    –60
    –100
    –220
    A
    0
    tr
    tf
    t
    0
    Inhibit
    1
    Vo/Vo nom
    0.1
    t
    0
    1
    0.95
    th
    Vi
    05025a
    Fig. 12
    Output response as a function of Vi or inhibit control
    Conditions:
    R input not connected. For multiple-output models the figures indicated in the table relate to the output, which reacts slowest. All
    outputs are resistively loaded. Variation of the input voltage within Vi min – Vi max does not influence the values considerably.
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