參數(shù)資料
    型號(hào): LX1721CDB
    英文描述: AudioMAX Products
    中文描述: AudioMAX產(chǎn)品
    文件頁(yè)數(shù): 4/14頁(yè)
    文件大?。?/td> 357K
    代理商: LX1721CDB
    Microsemi
    Linfinity Microelectronics Division
    11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
    Page 4
    Copyright
    2000
    Rev. 0.1b,2001-09-19
    W
    M
    .
    C
    AudioMAX
    LX1721 / 1722
    Class-D Stereo Power Amplifier Controller
    P
    RELIMINARY
    L I N F I N I T Y D I V I S I O N
    E L E C T R I C A L C H A R A C T E RI S T I C S
    Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C < TA < 70°C.
    Test conditions: RPWM = 34.8k, CPWM = 100pF, VDD = PVDD = 15V
    LX1721 / 1722
    Typ
    Parameter
    Symbol
    Test Conditions
    Min
    Max
    Units
    Evaluation Module (See Figure 2)
    Supply Voltage
    LX1721
    7
    15
    LX1722
    V
    DD
    V
    IN
    = 15V, V
    RIPPLE
    = 1V
    RMS
    , 20Hz
    to 20kHz
    V
    IN
    = 15V, R
    L
    =4
    , THD+N=1%,
    10Hz to 22kHz
    V
    IN
    = 25V, R
    L
    =4
    , THD+N=1%,
    10Hz to 22kHz
    V
    IN
    = 15V, f
    IN
    = 1kHz, P
    O
    = 10W
    7
    25
    V
    Power Supply Rejection Ratio
    PSRR
    -70
    dB
    25
    Output Power (Per Channel)
    P
    O
    60
    W
    82
    Efficiency
    V
    IN
    = 15V, f
    IN
    = 1kHz, P
    O
    = 20W
    85
    %
    f
    IN
    = 1kHz, P
    O
    = 1W
    .06
    Total Harmonic Distortion Plus Noise
    THD+N
    f
    IN
    = 20Hz to 20kHz, P
    O
    = 1W
    R
    L
    = 4
    , P
    O
    = 1W
    .2
    %
    Signal-To-Noise Ratio
    Oscillator Section
    SNR
    81
    dBr
    Oscillator Frequency
    F
    OSC
    I
    CHG
    335
    kHz
    μ
    A
    μ
    A
    V
    Charge Current
    (varies with V
    DD
    pin voltage)
    -110
    Discharge Current
    I
    DIS
    (varies with V
    DD
    pin voltage)
    110
    Oscillator Peak Voltage
    V
    PK
    (varies with V
    DD
    pin voltage)
    3.4
    Oscillator Valley Voltage
    V
    VAL
    (varies with V
    DD
    pin voltage)
    1.6
    V
    Voltage Stability
    V
    DD
    = 8V to 25V
    T
    A
    = 0
    O
    C to 70
    O
    C
    T
    A
    = -40
    O
    C to 125
    O
    C
    0.6
    2
    %
    1.0
    2
    %
    Temperature Stability
    1.5
    %
    Error Amplifier
    Input Offset Voltage
    V
    IO
    A
    OL
    5
    mV
    DC Open Loop Gain
    60
    dB
    Unity Gain Bandwidth
    UGBW
    I
    OUT
    = -100
    μ
    A
    I
    OUT
    = +100
    μ
    A
    7
    mHz
    High Output Voltage
    V
    OH
    V
    REF
    –1
    V
    Low Output Voltage
    V
    OL
    50
    mV
    Input Common Mode Range
    Input Bias Current
    Input Amplifier
    I
    IN
    V
    IN
    = 1V to V
    REF
    1
    μ
    A
    Stage Gain
    Set by Internal Resistors
    I
    OUT
    = -100
    μ
    A
    I
    OUT
    = +100
    μ
    A
    3.465
    3.5
    3.535
    V/V
    Output Voltage, High
    V
    OH
    3.85
    V
    Output Voltage, Low
    V
    OL
    1.3
    mV
    k
    Input Impedance
    42
    E
    L
    E
    C
    T
    R
    I
    C
    A
    L
    S
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