參數(shù)資料
型號(hào)： TAS5601DCARG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻／視頻放大
英文描述： 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56
封裝： GREEN, PLASTIC, HTSSOP-56
文件頁(yè)數(shù)： 5/26頁(yè)
文件大?。?/td> 2698K
代理商： TAS5601DCARG4
APPLICATION INFORMATION
CLOSED-LOOP POWER STAGE CHARACTERISTICS
POWER SUPPLIES
DEVICE PROTECTION SYSTEM
www.ti.com....................................................................................................................................... SLAS585A – FEBRUARY 2008 – REVISED SEPTEMBER 2008
The TAS5601 is PWM input power stage with a closed loop architecture. A 2nd order feedback loop varies the
PWM output duty cycle with changes in the supply voltage. This ensures that the output voltage (and output
power) remain the same over transitions in the power supply.
Open-loop power stages have an output duty cycle that is equal to the input duty cycle. Since the duty cycle
does NOT change to compensate for changes in the supply voltage, the output voltage (and power) change with
supply voltage changes. This is undesirable effect that closed-loop architecture of the TAS5601 solves.
The single-ended (SE) gain of the TAS5601 is fixed, and specified below:
TAS5601 Gain = 0.13 / Modulation Level (Vrms/%)
Modulation level = fraction of full-scale modulation of the PWM signal at the input of the power stage.
TAS5601 (SE) Voltage Level (in Vrms) = 0.13 x Modulation Level
The bridge-tied (BTL) gain of the TAS5601 is equal to 2x the SE gain:
TAS5601 (BTL) Voltage Level (in Vrms) = 0.26 x Modulation Level
For a digital modulator like the TAS5706, the default maximum modulation limit is 97.7%. For a full scale input,
the PWM output switches between 2.3% and 97.7%. This equates to a modulation level of 95.4% for a full scale
input (0 dBFS).
For example, calculate the output voltage in RMS volts given a –20 dBFS signal to a digital modulator with a
maximum modulation limit of 97.7% in a BTL output configuration:
TAS5601 Output Voltage = 0.1 (–20dB) x 0.26 (Gain) x 95.4 (Modulation Level)
= 2.48 Vrms
It is also important to maintain a switching signal at the PWM inputs of the TAS5601 while the RESET terminal is
held HIGH (>1.9V). If a switching signal is not maintained on the inputs under the previous condition, a loud
“pop” can occur in the speaker. The TAS5601 is not compatible with modulators that hard mute the outputs
(output go to LOW-LOW state). For MUTE case, the modulator needs to hold outputs switching at 50% duty
cycle.
For power-up, ensure that the PWM inputs are switching before RESET is transitioned HIGH (>1.9V). For
shutdown and power-down, the PWM inputs should remain switching for the “turn-off” time specified in the DC
Electrical Characteristics table. For SE mode, this is approximately 500ms. For BTL mode, the time is much
faster, at 30ms. This ensures the best “pop” performance in the system.
To allow simplified system design, the TAS5601 requires only a single supply (PVCC) for the the power blocks
and a 3.3 V (DVDD) supply for PWM input blocks. In addition, the high-side gate drive is provided by built-in
bootstrap circuits requiring only an external capacitor for each half-bridge.
In order for the bootstrap circuit to function properly, it is necessary to connect a small ceramic capacitor from
each bootstrap pin (BS_) to the corresponding output pin (OUT_). When the power-stage output is low, the
bootstrap capacitor is charged through an internal diode. 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 drive.
The TAS5601 contains a complete set of protection circuits carefully designed to make system design efficient as
well as to protect the device against any kind of permanent failures due to short circuits, overload,
overtemperature, and undervoltage.
Copyright 2008, Texas Instruments Incorporated
13
Product Folder Link(s): TAS5601
相關(guān)PDF資料
PDF描述
TAS5601DCAR 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56
TAS5601DCA 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56
TAS5611DKD 125 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO44
TAS5611PHD 125 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64
TAS5611PHDR 125 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TAS5601EVM4 功能描述:音頻 IC 開(kāi)發(fā)工具 TAS5601EVM4 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
TAS5602 制造商:TI 制造商全稱:Texas Instruments 功能描述:20W STEREO DIGITAL AMPLIFIER POWER STAGE
TAS5602_1 制造商:TI 制造商全稱:Texas Instruments 功能描述:20W STEREO DIGITAL AMPLIFIER POWER STAGE
TAS5602DCA 功能描述:音頻放大器 20W Stereo Dig Amp 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
TAS5602DCAG4 功能描述:音頻放大器 20W Stereo Dig Amp Pwr Stage w/ FB 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
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

*
*
*