參數(shù)資料
型號(hào)： TDA7491P
廠(chǎng)商： STMICROELECTRONICS
元件分類(lèi)： 音頻／視頻放大
英文描述： 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36
封裝： ROHS COMPLIANT, SSOP-36
文件頁(yè)數(shù)： 28/40頁(yè)
文件大?。?/td> 714K
代理商： TDA7491P
Applications information
TDA7491P
34/40
Doc ID 13540 Rev 4
7.4
Internal and external clocks
The clock of the class-D amplifier can be generated internally or can be driven by an
external source.
If two or more class-D amplifiers are used in the same system, it is recommended that all
devices operate at the same clock frequency. This can be implemented by using one
TDA7491P as master clock, while the other devices are in slave mode (that is, externally
clocked. The clock interconnect is via pin SYNCLK of each device. As explained below,
SYNCLK is an output in master mode and an input in slave mode.
7.4.1
Master mode (internal clock)
Using the internal oscillator, the output switching frequency, fSW, is controlled by the
resistor, ROSC, connected to pin ROSC:
fSW = 10
6 / ((16 * R
OSC + 182) * 4) kHz
where ROSC is in k.
In master mode, pin SYNCLK is used as a clock output pin, whose frequency is:
fSYNCLK = 2 * fSW
For master mode to operate correctly then resistor ROSC must be less than 60 k as given
below in Table 9.
7.4.2
Slave mode (external clock)
In order to accept an external clock input the pin ROSC must be left open, that is, floating.
This forces pin SYNCLK to be internally configured as an input as given in Table 9.
The output switching frequency of the slave devices is:
fSW = fSYNCLK / 2
Figure 53.
Master and slave connection
Table 9.
How to set up SYNCLK
Mode
ROSC
SYNCLK
Master
ROSC < 60 k
Output
Slave
Floating (not connected)
Input
SYNCLK
ROSC
Rosc
Cosc
ROSC
SYNCLK
39 k
100 nF
Output
Input
Master
Slave
TDA7491P
相關(guān)PDF資料
PDF描述
TDA749213TR 50 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36
TDA7492 50 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36
TDA7492MV13TR 50 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO36
TDA7492MV 50 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO36
TDA7492P 25 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA7491P13TR 功能描述:音頻放大器 20W Dual BTL Class D 18V VCC Audio Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
TDA7492 功能描述:音頻放大器 50W + 50W Dual BTL Class-D 4-Select dB RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
TDA749213TR 功能描述:音頻放大器 50W + 50W Dual BTL Class-D 4-Select dB RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
TDA7492ETR 功能描述:IC AUDIO AMP CLASS D 36POWERSSO 制造商:stmicroelectronics 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 類(lèi)型:D 類(lèi) 輸出類(lèi)型:1-通道（單聲道） 不同負(fù)載時(shí)的最大輸出功率 x 通道數(shù):50W x 1 @ 6 歐姆 電壓 - 電源:10 V ~ 26 V 特性:消除爆音，差分輸入，靜音，短路和熱保護(hù)，待機(jī) 安裝類(lèi)型:表面貼裝 工作溫度:0°C ~ 70°C（TA） 供應(yīng)商器件封裝:PowerSSO-36 EPU 封裝/外殼:36-FSOP（0.295"，7.50mm 寬）裸露焊盤(pán) 標(biāo)準(zhǔn)包裝:1
TDA7492MV 功能描述:音頻放大器 50W Mono BTL Class D 10 to 26V 4Select dB RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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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