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參數(shù)資料
| 型號： | TPA3007D1PW |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 6.5 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| 封裝： | GREEN, PLASTIC, TSSOP-24 |
| 文件頁數(shù)： | 8/22頁 |
| 文件大?。?/td> | 451K |
| 代理商： | TPA3007D1PW |
www.ti.com
BSN AND BSP CAPACITORS
BSN AND BSP RESISTORS
VCLAMP CAPACITOR
MIDRAIL BYPASS CAPACITOR
VREF DECOUPLING CAPACITOR
DIFFERENTIAL INPUT
SWITCHING FREQUENCY
fs +
6.6
R
OSC COSC
(7)
SHUTDOWN OPERATION
SLOS418D – SEPTEMBER 2003 – REVISED MARCH 2008
The full H-bridge output stage uses only NMOS transistors. It therefore requires bootstrap capacitors for the high
side of each output to turn on correctly. A 0.22-
F ceramic capacitor, rated for at least 25 V, must be connected
from each output to its corresponding bootstrap input. Specifically, one 0.22-
F capacitor must be connected
from OUTP to BSP, and one 0.22-
F capacitor must be connected from OUTN to BSN. (See Figure 13.)
To limit the current when charging the bootstrap capacitors, a resistor with a value of 51
(±10% maximum)
must be placed in series with each bootstrap capacitor. The current is limited to less than 500
A.
To ensure that the maximum gate-to-source voltage for the NMOS output transistors is not exceeded, an internal
regulator clamps the gate voltage. A 1-
F capacitor must be connected from VCLAMP (pin 7) to ground and
must be rated for at least 25 V. The voltage at VCLAMP (pin 7) varies with VCC and may not be used for
powering any other circuitry.
The midrail bypass capacitor (C11 of Figure 13) is the most critical capacitor and serves several important
functions. During start-up or recovery from shutdown mode, CBYPASS determines the rate at which the amplifier
starts up. The second function is to reduce noise produced by the power supply caused by coupling into the
output drive signal. This noise is from the midrail generation circuit internal to the amplifier, which appears as
degraded PSRR and THD+N.
Bypass capacitor (C11) values of 0.47
F to 1 F ceramic or tantalum low-ESR capacitors are recommended for
the best THD noise and de-pop performance. The bypass capacitor must be a value greater than the input
capacitors for optimum de-pop performance.
The VREF terminal (pin 23) is the output of an internally-generated 5-V supply, used for the oscillator and gain
setting logic. It requires a 0.1-
F to 1-F capacitor to ground to keep the regulator stable. The regulator may not
be used to power any additional circuitry.
The differential input stage of the amplifier cancels any noise that appears on both input lines of the channel. To
use the TPA3007D1 EVM 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 TPA3007D1 with a single-ended
source, ac ground the INN input through a capacitor and apply the audio signal to the INP input. In a
single-ended input application, the INN input should be ac-grounded at the audio source instead of at the device
input for best noise performance.
The switching frequency is determined using the values of the components connected to ROSC (pin 20) and COSC
(pin 21) and may be calculated with this equation:
The frequency can be varied from 225 kHz to 275 kHz by adjusting the values chosen for ROSC and COSC.
The TPA3007D1 employs a shutdown mode of operation designed to reduce supply current (ICC) to the absolute
minimum level during periods of non-use for battery-power conservation. The SHUTDOWN input terminal should
be held high 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, ICC(SD) = 1 A. SHUTDOWN should never be left
unconnected, because amplifier operation would be unpredictable.
16
Copyright 2003–2008, Texas Instruments Incorporated
Product Folder Link(s): TPA3007D1
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPA3007D1PW | 制造商:Texas Instruments 功能描述:IC AUDIO PWR AMP CLASS D 6.5 |
| TPA3007D1PWG4 | 功能描述:音頻放大器 Mono Med Power Filter-Free Class-D 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA3007D1PWR | 功能描述:音頻放大器 Mono Med Power Filter-Free Class-D 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA3007D1PWRG4 | 功能描述:音頻放大器 Mono Med Power Filter-Free Class-D 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA3008D2 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:10-W STEREO CLASS-D AUDIO POWER AMPLIFIER |
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