參數(shù)資料
型號(hào)： TDA749313TR
廠商： STMICROELECTRONICS
元件分類： 音頻／視頻放大
英文描述： 3 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24
封裝： ROHS COMPLIANT, MO-153ADT, SSOP-24
文件頁(yè)數(shù)： 7/30頁(yè)
文件大小： 863K
代理商： TDA749313TR
TDA7493
Application information
Doc ID 14570 Rev 5
15/30
5.5
Internal clock and external clock
The clock of the class-D amplifier can be generated internally or it can be synchronous with
the external clock. If two or more class-D amplifiers are used in the same system, it is better
to have all devices working at the same frequency. This is realized by using one TDA7493
as clock master and the others as slaves. All SYNCLK pins are connected together as
shown in Figure 8.
In master mode or with a single TDA7493, the output switching frequency is controlled by
the resistor connected to pin ROSC. The switching frequency is:
fSW = 10
6 / (R
OSC * 64 + 840)
where ROSC is in k and fSW is in kHz.
In this configuration pin SYNCLK is an output whose frequency is also determined by ROSC:
fSYNCLK = 10
6 / (R
OSC * 32 + 420) = 2 * fSW
Note:
ROSC should be lower than 60 k in master mode to avoid operating in error mode.
In slave mode, pin ROSC can be floating to force pin SYNCLK as input in order to accept the
master clock. The switching frequency in this mode is:
fSW = fSYNCLK / 2
Figure 8.
Master and slave modes
Table 9.
Master and slave mode
Mode
Pin ROSC
Pin SYNCLK
Master
ROSC < 60 k
Output
Slave
Floating
Input
Master
Slave
ROSC
SYNCLK
ROSC
Output
Input
TDA7493
COSC
100 nF
39 k
ROSC
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA7494 功能描述:音頻放大器 10W DC Amp w/Vol Cnt 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
TDA7494S 功能描述:音頻放大器 Video switch chip 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
TDA7494SA 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5W+5W AMPLIFIER WITH DC VOLUME CONTROL
TDA7495 功能描述:音頻放大器 11W DC Amp w/Vol Cnt 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
TDA7495S 功能描述:音頻放大器 11W/11W AMPLIFIER 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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