參數(shù)資料
    型號(hào): SI3216M-B-FM
    廠商: Silicon Laboratories Inc
    文件頁(yè)數(shù): 47/122頁(yè)
    文件大?。?/td> 0K
    描述: IC SLIC/CODEC 1CH 38QFN
    標(biāo)準(zhǔn)包裝: 43
    系列: ProSLIC®
    功能: 用戶線路接口概念(SLIC),CODEC
    接口: GCI,PCM,SPI
    電路數(shù): 1
    電源電壓: 3.13 V ~ 5.25 V
    電流 - 電源: 88mA
    功率(瓦特): 700mW
    工作溫度: 0°C ~ 70°C
    安裝類型: 表面貼裝
    封裝/外殼: 38-VFQFN 裸露焊盤
    供應(yīng)商設(shè)備封裝: 38-QFN(5x7)
    包裝: 管件
    包括: 音頻音調(diào)生成,BORSCHT 功能,F(xiàn)SK 生成,振鈴和電池電壓生成
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    Si3216
    30
    Rev. 1.0
    Not
    Recommended
    fo
    r N
    ew
    D
    esi
    gn
    s
    2.1.5. Power Monitoring and Line Fault Detection
    In addition to reporting voltages and currents, the
    ProSLIC continuously monitors the power dissipated in
    each external bipolar transistor. Real time output power
    of any one of the six linefeed transistors can be read by
    setting the Power Monitor Pointer (direct Register 76) to
    point to the desired transistor and then reading the Line
    Power Output Monitor (direct Register 77).
    The real time power measurements are low-pass
    filtered and compared to a maximum power threshold.
    Maximum power thresholds and filter time constants are
    software-programmable and should be set for each
    transistor pair based on the characteristics of the
    transistors used. Table 24 describes the registers
    associated with this function. If the power in any
    external transistor exceeds the programmed threshold,
    a power alarm event is triggered. The ProSLIC sets the
    Power Alarm register bit, generates an interrupt (if
    enabled), and automatically enters the Open state (if
    AOPN = 1).
    This
    feature
    protects
    the
    external
    transistors from fault conditions and, combined with the
    loop voltage and current monitors, allows diagnosis of
    the type of fault condition present on the line.
    The value of each thermal low-pass filter pole is set
    according to the following equation:
    where
    is the thermal time constant of the transistor
    package; 4096 is the full range of the 12-bit register, and
    800 is the sample rate in Hertz. Generally
    = 3 seconds
    for SOT223 packages and 0.16 seconds for SOT23, but
    check with the manufacturer for the thermal time
    constant of a specific device. For example, the power
    alarm threshold and low-pass filter values for Q5 and
    Q6 using an SOT223 package transistor are computed
    as follows:
    Thus, indirect Register 34 should be set to 150Dh.
    Note: The power monitor resolution for Q3 and Q4 is different
    from that of Q1, Q2, Q5, and Q6.
    Table 23. Measured Real Time Linefeed Interface Characteristics
    Parameter
    Measurement
    Range
    Resolution
    Register
    Bits
    Location*
    Loop Voltage Sense (VTIP – VRING)
    –94.5 to +94.5 V
    1.5 V
    LVSP,
    LVS[6:0]
    Direct Register 78
    Loop Current Sense
    –80 to +80 mA
    1.27 mA
    LCSP,
    LCS[5:0]
    Direct Register 79
    TIP Voltage Sense
    0 to –95.88 V
    0.376 V
    VTIP[7:0]
    Direct Register 80
    RING Voltage Sense
    0 to –95.88 V
    0.376 V
    VRING[7:0]
    Direct Register 81
    Battery Voltage Sense 1 (VBAT)
    0 to –95.88 V
    0.376 V
    VBATS1[7:0]
    Direct Register 82
    Battery Voltage Sense 2 (VBAT)
    0 to –95.88 V
    0.376 V
    VBATS2[7:0]
    Direct Register 83
    Transistor 1 Current Sense
    0 to 81.35 mA
    0.319 mA
    IQ1[7:0]
    Direct Register 84
    Transistor 2 Current Sense
    0 to 81.35 mA
    0.319 mA
    IQ2[7:0]
    Direct Register 85
    Transistor 3 Current Sense
    0 to 9.59 mA
    37.6 A
    IQ3[7:0]
    Direct Register 86
    Transistor 4 Current Sense
    0 to 9.59 mA
    37.6 A
    IQ4[7:0]
    Direct Register 87
    Transistor 5 Current Sense
    0 to 80.58 mA
    0.316 mA
    IQ5[7:0]
    Direct Register 88
    Transistor 6 Current Sense
    0 to 80.58 mA
    0.316 mA
    IQ6[7:0]
    Direct Register 89
    *Note: The ProSLIC uses registers that are both directly and indirectly mapped. A direct register is one that is mapped
    directly.
    thermal LPF register
    4096
    800
    ------------------
    2
    3
    =
    PPT56
    P
    MAX
    Resolution
    -------------------------------
    2
    7
    1.28
    0.0304
    ------------------
    2
    7
    5389
    150Dh
    ==
    =
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