參數(shù)資料
    型號(hào): TPA701DGNR
    廠商: TEXAS INSTRUMENTS INC
    元件分類(lèi): 音頻/視頻放大
    英文描述: 0.7 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
    封裝: GREEN, PLASTIC, MSOP-8
    文件頁(yè)數(shù): 11/28頁(yè)
    文件大?。?/td> 790K
    代理商: TPA701DGNR
    TPA701
    700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER
    SLOS229D – NOVEMBER1998 – REVISED MAY 2003
    19
    POST OFFICE BOX 655303
    DALLAS, TEXAS 75265
    APPLICATION INFORMATION
    headroom and thermal considerations (continued)
    This is valuable information to consider when attempting to estimate the heat dissipation requirements for the
    amplifier system. Comparing the absolute worst case, which is 700 mW of continuous power output with 0 dB
    of headroom, against 12 dB and 15 dB applications drastically affects maximum ambient temperature ratings
    for the system. Using the power dissipation curves for a 5-V, 8-
    system, the internal dissipation in the TPA701
    and maximum ambient temperatures is shown in Table 2.
    Table 2. TPA701 Power Rating, 5-V, 8-
    , BTL
    PEAK OUTPUT
    POWER
    AVERAGE OUTPUT
    POWER
    DISSIPATION
    D PACKAGE
    (SOIC)
    DGN PACKAGE
    (MSOP)
    POWER
    (mW)
    AVERAGE OUTPUT
    POWER
    DISSIPATION
    (mW)
    MAXIMUM AMBIENT
    TEMPERATURE
    MAXIMUM AMBIENT
    TEMPERATURE
    700
    700 mW
    675
    34
    °C
    110
    °C
    700
    350 mW (3 dB)
    595
    47
    °C
    115
    °C
    700
    176 mW (6 dB)
    475
    68
    °C
    122
    °C
    700
    88 mW (9 dB)
    350
    89
    °C
    125
    °C
    700
    44 mW (12 dB)
    225
    111
    °C
    125
    °C
    Table 2 shows that the TPA701 can be used to its full 700-mW rating without any heat sinking in still air up to
    110
    °C and 34°C for the DGN package (MSOP) and D package (SOIC) respectively.
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