參數(shù)資料
型號(hào)： TPA3004D2PHPG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻控制
英文描述： 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PQFP48
封裝： GREEN, PLASTIC, HTQFP-48
文件頁(yè)數(shù)： 25/46頁(yè)
文件大小： 838K
代理商： TPA3004D2PHPG4
AVDD – POWER-UP RESPONSE
AVCC
(pin 33)
Ch1
(AVDD)
Ch2
(AVCC)
AVDD
(pin 29)
Power–Up
Ch1 5.00 V/div
Ch2 2.00 V/div
M 10.0
s
www.ti.com
SLOS407E – FEBRUARY 2003 – REVISED JANUARY 2011
By driving the outputs into heavy clipping with a sine wave of less than 50 Hz, the bootstrap voltage can
decrease below the minimum Vgs required to keep the high-side output MOSFET turned on. When this occurs,
the output transistor becomes a source-follower and the output drops from VCC to approximately Vclamp (voltage
on pins 25 and 36).
For the majority of applications, driving a square wave at low frequencies is not a design consideration and the
recommended bootstrap capacitor value of 10-nF is acceptable. However, if this is a concern, increasing the
bootstrap capacitors holds the gate voltage for a longer period of time and the drop in the output voltage does
not occur. A value of 220-nF is recommended with a 51
Ω resistor placed in series between the outputs and
bootstrap pins. The 51
Ω series resistor is necessary to limit the current charging and discharging the bootstrap
capacitors.
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 0.1-F to 1-F capacitor, placed very close to the pin, to
ground to keep the regulator stable. The regulator may be used to power an external headphone amplifier or
other circuitry, up to a current limit specified in the specification table. When powering external circuitry, like the
TPA6110A2 headphone amplifier, an additional 10 F or larger capacitor should be added to the AVDD terminal.
Figure 46. Power-Up Response
Differential Input
The differential input stage of the amplifier cancels any noise that appears on both input lines of the channel. To
use the TPA3004D2 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 TPA3004D2 with a single-ended
source, ac ground the INP input through a capacitor equal in value to the input capacitor on INN and apply the
audio source to the INN input. In a single-ended input application, the INP input should be ac-grounded at the
audio source instead of at the device input for best noise performance.
Copyright 2003–2011, Texas Instruments Incorporated
31
Product Folder Link(s): TPA3004D2
相關(guān)PDF資料
PDF描述
TPA3005D2PHPR 6 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48
TPA3005D2PHP 6 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48
TPA3005D2PHPG4 6 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48
TPA3005D2PHPRG4 6 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48
TPA3007D1PWR 6.5 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO24
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPA3004D2PHPR 功能描述:音頻放大器 Stereo Hi-Pwr 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TPA3004D2PHPR 制造商:Texas Instruments 功能描述:AUDIO POWER AMPLIFIER IC
TPA3004D2PHPRG4 功能描述:音頻放大器 Stereo Hi-Pwr 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TPA3005D2 制造商:TI 制造商全稱:Texas Instruments 功能描述:6-W STEREO CLASS-D AUDIO POWER AMPLIFIER
TPA3005D2EVM 功能描述:音頻 IC 開(kāi)發(fā)工具 TPA3005D2 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*