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參數資料
| 型號： | TPA3008D2PHPRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48 |
| 封裝： | GREEN, PLASTIC, HTQFP-48 |
| 文件頁數： | 10/31頁 |
| 文件大?。?/td> | 654K |
| 代理商： | TPA3008D2PHPRG4 |
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SLOS435C – MAY 2004 – REVISED AUGUST 2010
www.ti.com
VCLAMP Capacitors
To ensure that the maximum gate-to-source voltage for the NMOS output transistors is not exceeded, two
internal regulators clamp the gate voltage. Two 1-F capacitors must be connected from VCLAMPL (pin 25) and
VCLAMPR (pin 36) to ground and must be rated for at least 25 V. The voltages at the VCLAMP terminals vary
with VCC and may not be used for powering any other circuitry.
Internal Regulated 5-V Supply (AVDD)
The AVDD terminal (pin 29) is the output of an internally generated 5-V supply, used for the oscillator,
preamplifier, and volume control circuitry. It requires a 1-F capacitor, placed close to the pin, to keep the
regulator stable.
This regulated voltage can be used to control GAIN0 and GAIN1 terminals, but should not be used to drive
external circuitry.
Differential Input
The differential input stage of the amplifier cancels any noise that appears on both input lines of the channel. To
use the TPA3008D2 with a differential source, connect the positive lead of the audio source to the INP input and
the negative lead from the audio source to the INN input. To use the TPA3008D2 with a single-ended source, ac
ground the INP or INN input through a capacitor equal in value to the input capacitor on INN or INP and apply
the audio source to either input. In a single-ended input application, the unused input should be ac grounded at
the audio source instead of at the device input for best noise performance.
SHUTDOWN OPERATION
The TPA3008D2 employs a shutdown mode of operation designed to reduce supply current (ICC) to the absolute
minimum level during periods of nonuse for power conservation. The SHUTDOWN input terminal should be held
high (see specification table for trip point) during normal operation when the amplifier is in use. Pulling
SHUTDOWN low causes the outputs to mute and the amplifier to enter a low-current state. Never leave
SHUTDOWN unconnected, because amplifier operation would be unpredictable.
For the best power-off pop performance, place the amplifier in the shutdown mode prior to removing the power
supply voltage.
USING LOW-ESR CAPACITORS
Low-ESR capacitors are recommended throughout this application section. A real (as opposed to ideal) capacitor
can be modeled simply as a resistor in series with an ideal capacitor. The voltage drop across this resistor
minimizes the beneficial effects of the capacitor in the circuit. The lower the equivalent value of this resistance,
the more the real capacitor behaves like an ideal capacitor.
18
Copyright 2004–2010, Texas Instruments Incorporated
Product Folder Link(s): TPA3008D2
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA3009D2PHP | 制造商:Texas Instruments 功能描述: |
| TPA3009D2PHPR | 制造商:Texas Instruments 功能描述: |
| TPA301 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:350-mW MONO AUDIO POWER AMPLIFIER |
| TPA301_07 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:350-mW MONO AUDIO POWER AMPLIFIER |
| TPA301D | 功能描述:音頻放大器 0.35W Mono Audio RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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