參數(shù)資料
    

    


    


    
型號(hào)：
TAS5613PHDR

    

    
廠商：
TEXAS INSTRUMENTS INC

    

    
元件分類：
音頻／視頻放大

    

    
英文描述：
150 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64

    

    
封裝：
GREEN, PLASTIC, HTQFP-64

    

    
文件頁(yè)數(shù)：
9/28頁(yè)

    

    
文件大?。?/td>
1505K

    

    
代理商：
TAS5613PHDR


    

    

    

	
    
    
    

    
    
	
    SLAS711A
    – JUNE 2010 – REVISED MARCH 2011
    THEORY OF OPERATION
    POWER SUPPLIES
    To facilitate system design, the TAS5613A needs only a 12V supply in addition to the (typical) 36V power-stage
    supply. An internal voltage regulator provides suitable voltage levels for the digital and low-voltage analog
    circuitry. Additionally, all circuitry requiring a floating voltage supply, e.g., the high-side gate drive, is
    accommodated by built-in bootstrap circuitry requiring only an external capacitor for each half-bridge.
    In order to provide outstanding electrical and acoustical characteristics, the PWM signal path including gate drive
    and output stage is designed as identical, independent half-bridges. For this reason, each half-bridge has
    separate gate drive supply (GVDD_X), bootstrap pins (BST_X), and power-stage supply pins (PVDD_X).
    Furthermore, an additional pin (VDD) is provided as supply for all common circuits. Although supplied from the
    same 12V source, separating to GVDD_A, GVDD_B, GVDD_C, GVDD_D, and VDD on the printed-circuit board
    (PCB) by RC filters (see application diagram for details) is recommended. These RC filters provide the
    recommended high-frequency isolation. Special attention should be paid to placing all decoupling capacitors as
    close to their associated pins as possible. In general, inductance between the power supply pins and decoupling
    capacitors must be avoided. (See reference board documentation for additional information.)
    For a properly functioning bootstrap circuit, a small ceramic capacitor must be connected from each bootstrap pin
    (BST_X) to the power-stage output pin (OUT_X). When the power-stage output is low, the bootstrap capacitor is
    charged through an internal diode connected between the gate-drive power-supply pin (GVDD_X) and the
    bootstrap pin. When the power-stage output is high, the bootstrap capacitor potential is shifted above the output
    potential and thus provides a suitable voltage supply for the high-side gate driver. In an application with PWM
    switching frequencies in the range from 300kHz to 400kHz, it is recommended to use 33nF ceramic capacitors,
    size 0603 or 0805, for the bootstrap supply. These 33nF capacitors ensure sufficient energy storage, even during
    minimal PWM duty cycles, to keep the high-side power stage FET (LDMOS) fully turned on during the remaining
    part of the PWM cycle.
    Special attention should be paid to the power-stage power supply; this includes component selection, PCB
    placement, and routing. As indicated, each half-bridge has independent power-stage supply pins (PVDD_X). For
    optimal electrical performance, EMI compliance, and system reliability, it is important that each PVDD_X pin is
    decoupled with a 2-
    μF ceramic capacitor placed as close as possible to each supply pin. It is recommended to
    follow the PCB layout of the TAS5613A reference design. For additional information on recommended power
    supply and required components, see the application diagrams in this data sheet.
    The 12V supply should be from a low-noise, low-output-impedance voltage regulator. Likewise, the 36V
    power-stage supply is assumed to have low output impedance and low noise. The power-supply sequence is not
    critical as facilitated by the internal power-on-reset circuit. Moreover, the TAS5613A is fully protected against
    erroneous power-stage turn on due to parasitic gate charging. Thus, voltage-supply ramp rates (dV/dt) are
    non-critical within the specified range (see the Recommended Operating Conditions table of this data sheet).
    SYSTEM POWER-UP/POWER-DOWN SEQUENCE
    Powering Up
    The TAS5613A does not require a power-up sequence. The outputs of the H-bridges remain in a
    high-impedance state until the gate-drive supply voltage (GVDD_X) and VDD voltage are above the undervoltage
    protection (UVP) voltage threshold (see the Electrical Characteristics table of this data sheet). Although not
    specifically required, it is recommended to hold RESET in a low state while powering up the device. This allows
    an internal circuit to charge the external bootstrap capacitors by enabling a weak pulldown of the half-bridge
    output.
    Powering Down
    The TAS5613A does not require a power-down sequence. The device remains fully operational as long as the
    gate-drive supply (GVDD_X) voltage and VDD voltage are above the undervoltage protection (UVP) voltage
    threshold (see the Electrical Characteristics table of this data sheet). Although not specifically required, it is a
    good practice to hold RESET low during power down, thus preventing audible artifacts including pops or clicks.
    Copyright
     2010–2011, Texas Instruments Incorporated
    17
    Product Folder Link(s): TAS5613A
    
    
    
    
    
    


    


    

    相關(guān)PDF資料
    		

    PDF描述
    		

    
    

    
TAS5613PHD
150 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64

    

    
TAS5613APHDR
150 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64

    

    
TAS5613APHD
150 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64

    

    
TAS5614ADKDR
150 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO44

    

    
TAS5614ADKD
150 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO44

    

    

    

    


    


    

    相關(guān)代理商/技術(shù)參數(shù)
    		

    參數(shù)描述
    		

    
    

    
TAS5614
 制造商:TI 制造商全稱:Texas Instruments 功能描述:150W STEREO / 300W MONO PurePath? HD DIGITAL-INPUT POWER STAGE

    

    
TAS5614A
 制造商:TI 制造商全稱:Texas Instruments 功能描述:150W STEREO / 300W MONO PurePath? HD DIGITAL-INPUT POWER STAGE

    

    
TAS5614ADKD
功能描述:音頻放大器 150W St/300W MONO HD Dig-In Pwr Stage RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel

    

    
TAS5614ADKDR
功能描述:音頻放大器 150W St/300W MONO HD Dig-In Pwr Stage RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel

    

    
TAS5614APHD
功能描述:音頻放大器 150W Stereo/300W Mono PurePath RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel

    

    
    
    
    
	
    	
    
    
     
     
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