參數(shù)資料
型號(hào)： TAS5704PAPR
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻／視頻放大
英文描述： 20.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64
封裝： GREEN, PLASTIC, HTQFP-64
文件頁(yè)數(shù)： 18/38頁(yè)
文件大?。?/td> 735K
代理商： TAS5704PAPR
www.ti.com
SLOS563A – MARCH 2008 – REVISED AUGUST 2010
PROTECTION MECHANISMS IN THE TAS5704
SCP (short-circuit protection) protects against shorts across the load, to GND, and to PVCC.
OTP turns off the device if Tjunction (typical) > 150°C.
UVP turns off the device if PVCC (typical) < 8.4 V
OVP turns off the device if PVCC (typical) > 27.5 V
A short-circuit condition can be detected also by an external controller. The VALID pin goes low in the event of a
short circuit. The VALID pin can be monitored by an external mC. The TAS5704 initiates a back-end error
sequence by itself to recover from the error, which involves settling VALID low for 300 ms and then retrying to
check whether the short-circuit condition still exists.
RECOVERY FROM ERROR
OTP turns on the device back when Tdie(typical) < 135°C.
UVP turns on the device if PVCC (typical) is > 8.5 V.
OVP turns on the device if PVCC (typical) is < 27.2 V.
SCP (short-circuit protection) turns on the device if the short-circuit is removed. See the Back-End Error
section for the sequence.
SINGLE-ENDED OUTPUT CAPACITOR, CO
In single-ended (SE) applications, the dc blocking capacitor forms a high-pass filter with the speaker impedance.
The frequency response rolls of with decreasing frequency at a rate of 20 dB/decade. The cutoff frequency is
determined by
fc = 1/2pCOZL
(1)
Table 4 shows some common component values and the associated cutoff frequencies:
Table 4. Common Filter Responses
CSE – DC BLOCKING CAPACITOR (mF)
SPEAKER IMPEDANCE (
)
fc = 60 Hz (–3 dB)
fc = 40 Hz (–3 dB)
fc = 20 Hz (–3 dB)
4
680
1000
2200
8
330
470
1000
OUTPUT FILTER AND FREQUENCY RESPONSE
For the best frequency response, a flat-passband output filter (second-order Butterworth) may be used. The
output filter components consist of the series inductor and capacitor to ground at the output pins. There are
several possible configurations, depending on the speaker impedance and whether the output configuration is
single-ended (SE) or bridge-tied load (BTL). Table 5 lists the recommended values for the filter components. It is
important to use a high-quality capacitor in this application. A rating of at least X7R is required.
Table 5. Recommended Filter Output Components
OUTPUT CONFIGURATION
SPEAKER IMPEDANCE (
)
FILTER INDUCTOR (mH)
FILTER CAPACITOR (nF)
4
22
680
Single Ended (SE)
8
47
390
4
10
1500
Bridge Tied Load (BTL)
8
22
680
Copyright 2008–2010, Texas Instruments Incorporated
25
Product Folder Link(s): TAS5704
相關(guān)PDF資料
PDF描述
TAS5704PAP 20.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64
TAS5704PAPG4 20.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64
TAS5705PAPG4 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64
TAS5705PAPRG4 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64
TAS5705PAPR 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TAS5704PAPRG4 功能描述:音頻放大器 20W stereo Dig Aud Pwr Amp 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
TAS5705 制造商:TI 制造商全稱:Texas Instruments 功能描述:20-W STEREO DIGITAL AUDIO POWER AMPLIFIER WITH EQ AND DRC
TAS5705EVM2 功能描述:音頻 IC 開(kāi)發(fā)工具 TAS5705EVM2 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
TAS5705PAP 功能描述:音頻放大器 20W stereo Dig Audio Pwr Amp 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
TAS5705PAPG4 功能描述:音頻放大器 20W stereo Dig Aud Pwr Amp 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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