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参数资料
| 型号： | TDA7572 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQFP64 |
| 封装： | ROHS COMPLIANT, HIQUAD-64 |
| 文件页数： | 36/64页 |
| 文件大小： | 1052K |
| 代理商： | TDA7572 |
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TDA7572
Modulator
7
Modulator
The modulator PWM is the main function of device. Two modulators are provided which are
operated independently but configured for bridged mono operations. They are synchronized
by virtue of the common clock that drives them and operate as a three-state modulator
(phase shifting PWM modulation type) when the audio is inverted going to one modulator.
This inversion is accommodated by a dedicated inverter block present between the InvIn
and InvOut pin.
Figure 5.
Modulator block diagram
The above scheme reports the application circuits and internal block involved in the PWM
modulator. The analog signal is differential to single ended converted by the amplifier. The
signal obtained is inserted as current in the virtual ground of modulator MOD0. The
conversion is obtained trough R1 resistor. The same signal, output of AOUT, is inverted and
inserted in the virtual ground MOD1 through the resistor R1.
In order to obtain a PWM signal a square wave is inserted in both MOD0 and MOD1 through
the RQ resistor. The Gain of Modulator is equal to the ratio of R1/R2. In Order to choose the
value of RQ has to take into account the stability of modulator, guarantee if the following
relation is respected:
Equation 1
Clocked PWM modulators using an integrated T-network double integrator are implemented.
The end user has the ability to trade distortion for EMI by switching faster or slower,
controlled by PWMClock[1:0] in the modulator register.
SVR
R2
InvOut
InvIn
OSCOut
MOD1
MOD2
HB1Out
HB2Out
VHB1OutF
VHB2OutF
R2
Aout
R1
RQ
OSC
Diff -To S.E.
Inv
MOD0
MOD1
AC00017
VP2.5
RQ
-----------------
VAOUTmax
R1
----------------------------------
VSP
VSVR
–
R2
------------------------------------
+
>
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA7572TR | 功能描述:音频放大器 200W Mono Bridge PWM Amplifier Built-In RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TDA7575 | 功能描述:音频放大器 MULTI F DUAL AMP RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TDA7575B | 功能描述:音频放大器 2 x 75W Multifunct Dual-Bridge Pwr Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TDA7575BPD | 功能描述:音频放大器 2 x 75W Multifunct Dual-Bridge Pwr Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TDA7575BPDTR | 功能描述:音频放大器 2 x 75W Multifunct Dual-Bridge Pwr Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
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