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| 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： | 43/64页 |
| 文件大小： | 1052K |
| 代理商： | TDA7572 |
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Diagnostics
TDA7572
10
Diagnostics
Diagnostics are grouped into two categories, those performed only during standby, and
those available during amplifier operation.
When Mode[1:0] indicate the I2C is active, the RunDiag bit must be set (by an I2C write to
the Faults1 register) to initiate diagnostics.
When Mode[1:0]indicate the I2C is not active, the state of Mode[1:0] are further decoded to
determine if the diagnostics should be run automatically during power-up
Diagnostics performed during power-up (Power Up Diagnostic or PUD, sometimes called
"Turn-on-diagnostics") are:
1.
Output shorted to ground
2.
Output shorted to Vs
3.
Shorted transducer
4.
Open Transducer
During operation the following conditions are continuously monitored:
1.
DC offset across the speaker
2.
Die temperature
3.
External temperature
4.
Output Clipping
5.
Output overcurrent
6.
Power supply overcurrent
Faults are reported in a simple manner for bus free operation. The open drain WS/Clip_L pin
asserts when clipping occurs, and the Address0/Fault_L pin asserts if any there are any
other faults. In case of busfree operation the Address0/Fault is the logical OR of all fault
conditions. When I2C bus is present, one can read detailed fault status, as well as control
the diagnostics being performed via TDA7572's registers, Address0/Fault_L is used to
determine which one has to be the I2C bus Address0 of this IC or, in case of DAC operation,
it is used to assert when clipping occurs. In this case the Address0 of I2C bus address is
automatically set to zero, which implies that only two TDA7572 can be addressed. In any
Mode case a clipping output is present.
The detailed procedure implemented to manage these faults follows:
10.1
Faults during operation:
10.1.1
DC offset across the speaker
I2Cbus: If the module of VHOUTF1 - VHOUTF2 > 3Vfor more then 100ms the Offset bit in
register Faults2 is set and the external FET's are tristated. The bit is cleared using the
W1TC procedure. Resetting the bit removes the tristate mode and modulator operation is
restored
No I2Cbus: Operation is as above except the fault is also reported by asserting the
Address0/Fault_L pin. In order to restart the system is necessary to pass through standby
mode.
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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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